./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.11.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.11.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs --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 58ba472d0eab58f0bee7768d9e5b3bb2a3404d90b32bd7c010fe277536e64fd4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:50:04,682 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:50:04,684 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:50:04,715 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:50:04,716 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:50:04,718 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:50:04,720 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:50:04,722 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:50:04,725 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:50:04,726 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:50:04,727 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:50:04,729 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:50:04,730 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:50:04,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:50:04,733 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:50:04,735 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:50:04,737 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:50:04,738 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:50:04,741 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:50:04,743 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:50:04,746 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:50:04,747 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:50:04,749 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:50:04,750 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:50:04,755 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:50:04,755 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:50:04,756 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:50:04,757 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:50:04,758 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:50:04,759 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:50:04,760 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:50:04,761 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:50:04,762 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:50:04,763 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:50:04,765 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:50:04,765 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:50:04,766 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:50:04,766 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:50:04,767 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:50:04,768 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:50:04,769 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:50:04,770 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:50:04,797 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:50:04,802 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:50:04,803 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:50:04,803 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:50:04,803 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:50:04,804 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:50:04,804 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:50:04,804 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:50:04,804 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:50:04,805 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:50:04,809 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:50:04,809 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:50:04,809 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:50:04,810 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:50:04,810 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:50:04,810 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:50:04,811 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:50:04,811 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:50:04,811 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:50:04,812 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:50:04,812 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:50:04,812 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:50:04,812 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:50:04,813 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:50:04,813 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:50:04,813 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:50:04,813 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:50:04,814 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:50:04,815 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:50:04,816 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:50:04,817 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:50:04,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:50:04,817 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:50:04,818 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:50:04,818 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:50:04,818 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:50:04,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:50:04,819 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:50:04,820 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:50:04,820 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:50:04,820 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 58ba472d0eab58f0bee7768d9e5b3bb2a3404d90b32bd7c010fe277536e64fd4 [2021-11-19 14:50:05,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:50:05,226 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:50:05,229 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:50:05,231 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:50:05,232 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:50:05,233 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.11.cil-1.c [2021-11-19 14:50:05,314 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/data/990723a7a/6ade3b3b5fb646d483a6a2602da0d066/FLAG130c7fb86 [2021-11-19 14:50:06,444 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:50:06,445 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/sv-benchmarks/c/combinations/Problem05_label43+token_ring.11.cil-1.c [2021-11-19 14:50:06,529 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/data/990723a7a/6ade3b3b5fb646d483a6a2602da0d066/FLAG130c7fb86 [2021-11-19 14:50:06,642 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/data/990723a7a/6ade3b3b5fb646d483a6a2602da0d066 [2021-11-19 14:50:06,644 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:50:06,646 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:50:06,648 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:50:06,648 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:50:06,652 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:50:06,653 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:50:06" (1/1) ... [2021-11-19 14:50:06,654 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b94bb8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:06, skipping insertion in model container [2021-11-19 14:50:06,654 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:50:06" (1/1) ... [2021-11-19 14:50:06,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:50:06,942 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:50:09,494 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/sv-benchmarks/c/combinations/Problem05_label43+token_ring.11.cil-1.c[381679,381692] [2021-11-19 14:50:09,531 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/sv-benchmarks/c/combinations/Problem05_label43+token_ring.11.cil-1.c[383339,383352] [2021-11-19 14:50:09,934 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:50:09,949 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:50:11,250 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/sv-benchmarks/c/combinations/Problem05_label43+token_ring.11.cil-1.c[381679,381692] [2021-11-19 14:50:11,255 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/sv-benchmarks/c/combinations/Problem05_label43+token_ring.11.cil-1.c[383339,383352] [2021-11-19 14:50:11,280 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:50:11,370 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:50:11,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:11 WrapperNode [2021-11-19 14:50:11,371 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:50:11,373 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:50:11,373 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:50:11,373 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:50:11,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:11" (1/1) ... [2021-11-19 14:50:11,506 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:11" (1/1) ... [2021-11-19 14:50:11,936 INFO L137 Inliner]: procedures = 66, calls = 75, calls flagged for inlining = 43, calls inlined = 43, statements flattened = 13146 [2021-11-19 14:50:11,937 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:50:11,938 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:50:11,938 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:50:11,938 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:50:12,043 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:11" (1/1) ... [2021-11-19 14:50:12,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:11" (1/1) ... [2021-11-19 14:50:12,165 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:11" (1/1) ... [2021-11-19 14:50:12,165 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:11" (1/1) ... [2021-11-19 14:50:12,349 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:11" (1/1) ... [2021-11-19 14:50:12,416 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:11" (1/1) ... [2021-11-19 14:50:12,547 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:11" (1/1) ... [2021-11-19 14:50:12,721 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:50:12,723 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:50:12,723 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:50:12,723 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:50:12,724 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:11" (1/1) ... [2021-11-19 14:50:12,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:50:12,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:50:12,772 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:50:12,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:50:12,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:50:12,876 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-19 14:50:12,876 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-19 14:50:12,876 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-19 14:50:12,876 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-19 14:50:12,876 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-19 14:50:12,877 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-19 14:50:12,877 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-11-19 14:50:12,877 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-11-19 14:50:12,877 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-19 14:50:12,878 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-19 14:50:12,878 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-19 14:50:12,878 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-19 14:50:12,878 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-19 14:50:12,878 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-19 14:50:12,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 14:50:12,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:50:12,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:50:13,132 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:50:13,147 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:50:21,510 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:50:25,421 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:50:25,421 INFO L301 CfgBuilder]: Removed 15 assume(true) statements. [2021-11-19 14:50:25,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:50:25 BoogieIcfgContainer [2021-11-19 14:50:25,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:50:25,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:50:25,428 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:50:25,436 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:50:25,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:50:06" (1/3) ... [2021-11-19 14:50:25,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57a5fdb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:50:25, skipping insertion in model container [2021-11-19 14:50:25,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:11" (2/3) ... [2021-11-19 14:50:25,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57a5fdb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:50:25, skipping insertion in model container [2021-11-19 14:50:25,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:50:25" (3/3) ... [2021-11-19 14:50:25,440 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.11.cil-1.c [2021-11-19 14:50:25,446 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:50:25,446 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-19 14:50:25,512 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:50:25,519 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 14:50:25,520 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-19 14:50:25,592 INFO L276 IsEmpty]: Start isEmpty. Operand has 1826 states, 1789 states have (on average 1.9580771380659587) internal successors, (3503), 1794 states have internal predecessors, (3503), 27 states have call successors, (27), 7 states have call predecessors, (27), 7 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-19 14:50:25,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-19 14:50:25,612 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:25,613 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:25,613 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:25,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:25,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1167172770, now seen corresponding path program 1 times [2021-11-19 14:50:25,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:50:25,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532839114] [2021-11-19 14:50:25,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:25,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:50:25,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:26,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:50:26,141 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:50:26,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532839114] [2021-11-19 14:50:26,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532839114] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:50:26,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:50:26,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:50:26,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604077344] [2021-11-19 14:50:26,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:26,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:50:26,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:50:26,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:50:26,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:50:26,193 INFO L87 Difference]: Start difference. First operand has 1826 states, 1789 states have (on average 1.9580771380659587) internal successors, (3503), 1794 states have internal predecessors, (3503), 27 states have call successors, (27), 7 states have call predecessors, (27), 7 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 14:50:27,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:27,446 INFO L93 Difference]: Finished difference Result 3811 states and 7391 transitions. [2021-11-19 14:50:27,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:50:27,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 65 [2021-11-19 14:50:27,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:27,483 INFO L225 Difference]: With dead ends: 3811 [2021-11-19 14:50:27,483 INFO L226 Difference]: Without dead ends: 1984 [2021-11-19 14:50:27,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:50:27,504 INFO L933 BasicCegarLoop]: 3488 mSDtfsCounter, 3754 mSDsluCounter, 3695 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3754 SdHoareTripleChecker+Valid, 6880 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:27,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3754 Valid, 6880 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:50:27,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2021-11-19 14:50:27,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1983. [2021-11-19 14:50:27,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1983 states, 1921 states have (on average 1.9229567933368037) internal successors, (3694), 1925 states have internal predecessors, (3694), 48 states have call successors, (48), 13 states have call predecessors, (48), 12 states have return successors, (46), 45 states have call predecessors, (46), 46 states have call successors, (46) [2021-11-19 14:50:27,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1983 states to 1983 states and 3788 transitions. [2021-11-19 14:50:27,708 INFO L78 Accepts]: Start accepts. Automaton has 1983 states and 3788 transitions. Word has length 65 [2021-11-19 14:50:27,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:27,709 INFO L470 AbstractCegarLoop]: Abstraction has 1983 states and 3788 transitions. [2021-11-19 14:50:27,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 14:50:27,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1983 states and 3788 transitions. [2021-11-19 14:50:27,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 14:50:27,719 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:27,719 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-11-19 14:50:27,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 14:50:27,723 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:27,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:27,726 INFO L85 PathProgramCache]: Analyzing trace with hash -684144021, now seen corresponding path program 1 times [2021-11-19 14:50:27,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:50:27,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130079447] [2021-11-19 14:50:27,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:27,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:50:27,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:27,918 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:50:27,918 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:50:27,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130079447] [2021-11-19 14:50:27,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130079447] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:27,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762430149] [2021-11-19 14:50:27,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:27,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:50:27,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:50:27,921 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:50:27,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 14:50:28,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:28,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:50:28,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:28,510 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:50:28,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:28,886 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-19 14:50:28,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762430149] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:28,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:50:28,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-19 14:50:28,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031692446] [2021-11-19 14:50:28,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:28,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:50:28,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:50:28,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:50:28,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:50:28,911 INFO L87 Difference]: Start difference. First operand 1983 states and 3788 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:50:29,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:29,468 INFO L93 Difference]: Finished difference Result 2650 states and 4829 transitions. [2021-11-19 14:50:29,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:50:29,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2021-11-19 14:50:29,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:29,491 INFO L225 Difference]: With dead ends: 2650 [2021-11-19 14:50:29,492 INFO L226 Difference]: Without dead ends: 2313 [2021-11-19 14:50:29,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 257 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:50:29,497 INFO L933 BasicCegarLoop]: 3340 mSDtfsCounter, 3497 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3497 SdHoareTripleChecker+Valid, 3557 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:29,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3497 Valid, 3557 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:50:29,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2021-11-19 14:50:29,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 2307. [2021-11-19 14:50:29,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2307 states, 2193 states have (on average 1.8718650250797995) internal successors, (4105), 2198 states have internal predecessors, (4105), 88 states have call successors, (88), 25 states have call predecessors, (88), 24 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-19 14:50:29,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2307 states to 2307 states and 4279 transitions. [2021-11-19 14:50:29,613 INFO L78 Accepts]: Start accepts. Automaton has 2307 states and 4279 transitions. Word has length 130 [2021-11-19 14:50:29,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:29,613 INFO L470 AbstractCegarLoop]: Abstraction has 2307 states and 4279 transitions. [2021-11-19 14:50:29,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:50:29,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2307 states and 4279 transitions. [2021-11-19 14:50:29,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 14:50:29,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:29,625 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-11-19 14:50:29,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:29,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:50:29,850 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:29,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:29,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1787353111, now seen corresponding path program 1 times [2021-11-19 14:50:29,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:50:29,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636781300] [2021-11-19 14:50:29,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:29,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:50:29,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:50:29,951 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:50:29,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636781300] [2021-11-19 14:50:29,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636781300] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:29,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471247286] [2021-11-19 14:50:29,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:29,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:50:29,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:50:29,970 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:50:29,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 14:50:30,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:30,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:50:30,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:30,509 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 14:50:30,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:30,774 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 14:50:30,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471247286] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:30,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:50:30,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-19 14:50:30,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175959386] [2021-11-19 14:50:30,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:30,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:50:30,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:50:30,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:50:30,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:50:30,778 INFO L87 Difference]: Start difference. First operand 2307 states and 4279 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:50:31,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:31,383 INFO L93 Difference]: Finished difference Result 3616 states and 6318 transitions. [2021-11-19 14:50:31,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:50:31,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2021-11-19 14:50:31,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:31,413 INFO L225 Difference]: With dead ends: 3616 [2021-11-19 14:50:31,413 INFO L226 Difference]: Without dead ends: 2955 [2021-11-19 14:50:31,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 257 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:50:31,424 INFO L933 BasicCegarLoop]: 3339 mSDtfsCounter, 3509 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3509 SdHoareTripleChecker+Valid, 3556 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:31,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3509 Valid, 3556 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:50:31,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2021-11-19 14:50:31,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2947. [2021-11-19 14:50:31,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2947 states, 2731 states have (on average 1.7997070670084219) internal successors, (4915), 2738 states have internal predecessors, (4915), 166 states have call successors, (166), 49 states have call predecessors, (166), 48 states have return successors, (164), 160 states have call predecessors, (164), 164 states have call successors, (164) [2021-11-19 14:50:31,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2947 states to 2947 states and 5245 transitions. [2021-11-19 14:50:31,569 INFO L78 Accepts]: Start accepts. Automaton has 2947 states and 5245 transitions. Word has length 130 [2021-11-19 14:50:31,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:31,570 INFO L470 AbstractCegarLoop]: Abstraction has 2947 states and 5245 transitions. [2021-11-19 14:50:31,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:50:31,570 INFO L276 IsEmpty]: Start isEmpty. Operand 2947 states and 5245 transitions. [2021-11-19 14:50:31,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 14:50:31,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:31,577 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-11-19 14:50:31,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:31,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:50:31,792 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:31,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:31,793 INFO L85 PathProgramCache]: Analyzing trace with hash -460375961, now seen corresponding path program 1 times [2021-11-19 14:50:31,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:50:31,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626484711] [2021-11-19 14:50:31,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:31,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:50:31,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:50:31,883 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:50:31,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626484711] [2021-11-19 14:50:31,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626484711] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:31,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852094739] [2021-11-19 14:50:31,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:31,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:50:31,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:50:31,885 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:50:31,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 14:50:32,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:32,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:50:32,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:32,483 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:50:32,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 14:50:32,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852094739] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:32,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:50:32,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-19 14:50:32,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939963365] [2021-11-19 14:50:32,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:32,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:50:32,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:50:32,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:50:32,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:50:32,852 INFO L87 Difference]: Start difference. First operand 2947 states and 5245 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:50:33,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:33,662 INFO L93 Difference]: Finished difference Result 5524 states and 9246 transitions. [2021-11-19 14:50:33,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:50:33,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2021-11-19 14:50:33,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:33,697 INFO L225 Difference]: With dead ends: 5524 [2021-11-19 14:50:33,697 INFO L226 Difference]: Without dead ends: 4223 [2021-11-19 14:50:33,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 257 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:50:33,704 INFO L933 BasicCegarLoop]: 3301 mSDtfsCounter, 3491 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3491 SdHoareTripleChecker+Valid, 3518 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:33,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3491 Valid, 3518 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:50:33,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4223 states. [2021-11-19 14:50:33,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4223 to 4211. [2021-11-19 14:50:33,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4211 states, 3795 states have (on average 1.7156785243741766) internal successors, (6511), 3806 states have internal predecessors, (6511), 318 states have call successors, (318), 97 states have call predecessors, (318), 96 states have return successors, (316), 308 states have call predecessors, (316), 316 states have call successors, (316) [2021-11-19 14:50:33,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4211 states to 4211 states and 7145 transitions. [2021-11-19 14:50:33,959 INFO L78 Accepts]: Start accepts. Automaton has 4211 states and 7145 transitions. Word has length 130 [2021-11-19 14:50:33,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:33,960 INFO L470 AbstractCegarLoop]: Abstraction has 4211 states and 7145 transitions. [2021-11-19 14:50:33,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:50:33,960 INFO L276 IsEmpty]: Start isEmpty. Operand 4211 states and 7145 transitions. [2021-11-19 14:50:33,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 14:50:33,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:33,970 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-11-19 14:50:34,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:34,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:50:34,195 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:34,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:34,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1380519013, now seen corresponding path program 1 times [2021-11-19 14:50:34,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:50:34,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906124177] [2021-11-19 14:50:34,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:34,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:50:34,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:34,316 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:50:34,317 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:50:34,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906124177] [2021-11-19 14:50:34,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906124177] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:34,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803008227] [2021-11-19 14:50:34,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:34,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:50:34,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:50:34,319 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:50:34,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 14:50:34,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:34,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:50:34,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:34,815 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 14:50:34,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:35,140 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 14:50:35,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803008227] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:35,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:50:35,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-19 14:50:35,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763682337] [2021-11-19 14:50:35,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:35,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:50:35,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:50:35,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:50:35,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:50:35,143 INFO L87 Difference]: Start difference. First operand 4211 states and 7145 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:50:35,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:35,889 INFO L93 Difference]: Finished difference Result 9292 states and 15002 transitions. [2021-11-19 14:50:35,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:50:35,890 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2021-11-19 14:50:35,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:35,947 INFO L225 Difference]: With dead ends: 9292 [2021-11-19 14:50:35,948 INFO L226 Difference]: Without dead ends: 6727 [2021-11-19 14:50:35,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 257 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:50:35,966 INFO L933 BasicCegarLoop]: 3337 mSDtfsCounter, 3515 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3515 SdHoareTripleChecker+Valid, 3554 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:35,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3515 Valid, 3554 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:50:35,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6727 states. [2021-11-19 14:50:36,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6727 to 6707. [2021-11-19 14:50:36,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6707 states, 5899 states have (on average 1.6367180878114935) internal successors, (9655), 5918 states have internal predecessors, (9655), 614 states have call successors, (614), 193 states have call predecessors, (614), 192 states have return successors, (612), 596 states have call predecessors, (612), 612 states have call successors, (612) [2021-11-19 14:50:36,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6707 states to 6707 states and 10881 transitions. [2021-11-19 14:50:36,334 INFO L78 Accepts]: Start accepts. Automaton has 6707 states and 10881 transitions. Word has length 130 [2021-11-19 14:50:36,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:36,335 INFO L470 AbstractCegarLoop]: Abstraction has 6707 states and 10881 transitions. [2021-11-19 14:50:36,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:50:36,336 INFO L276 IsEmpty]: Start isEmpty. Operand 6707 states and 10881 transitions. [2021-11-19 14:50:36,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 14:50:36,351 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:36,351 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-11-19 14:50:36,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:36,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:50:36,578 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:36,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:36,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1550206563, now seen corresponding path program 1 times [2021-11-19 14:50:36,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:50:36,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896224278] [2021-11-19 14:50:36,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:36,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:50:36,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:36,659 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:50:36,659 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:50:36,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896224278] [2021-11-19 14:50:36,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896224278] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:36,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838747013] [2021-11-19 14:50:36,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:36,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:50:36,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:50:36,673 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:50:36,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 14:50:36,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:36,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:50:36,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:37,151 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:50:37,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:37,446 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:50:37,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838747013] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:37,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:50:37,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-19 14:50:37,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888968372] [2021-11-19 14:50:37,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:37,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:50:37,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:50:37,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:50:37,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:50:37,449 INFO L87 Difference]: Start difference. First operand 6707 states and 10881 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:50:38,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:38,378 INFO L93 Difference]: Finished difference Result 16732 states and 26314 transitions. [2021-11-19 14:50:38,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:50:38,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2021-11-19 14:50:38,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:38,470 INFO L225 Difference]: With dead ends: 16732 [2021-11-19 14:50:38,470 INFO L226 Difference]: Without dead ends: 11671 [2021-11-19 14:50:38,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 257 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:50:38,506 INFO L933 BasicCegarLoop]: 3336 mSDtfsCounter, 3518 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3518 SdHoareTripleChecker+Valid, 3553 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:38,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3518 Valid, 3553 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:50:38,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11671 states. [2021-11-19 14:50:39,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11671 to 11635. [2021-11-19 14:50:39,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11635 states, 10059 states have (on average 1.575405109851874) internal successors, (15847), 10094 states have internal predecessors, (15847), 1190 states have call successors, (1190), 385 states have call predecessors, (1190), 384 states have return successors, (1188), 1156 states have call predecessors, (1188), 1188 states have call successors, (1188) [2021-11-19 14:50:39,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11635 states to 11635 states and 18225 transitions. [2021-11-19 14:50:39,216 INFO L78 Accepts]: Start accepts. Automaton has 11635 states and 18225 transitions. Word has length 130 [2021-11-19 14:50:39,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:39,216 INFO L470 AbstractCegarLoop]: Abstraction has 11635 states and 18225 transitions. [2021-11-19 14:50:39,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:50:39,217 INFO L276 IsEmpty]: Start isEmpty. Operand 11635 states and 18225 transitions. [2021-11-19 14:50:39,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 14:50:39,244 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:39,244 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-11-19 14:50:39,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:39,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:50:39,458 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:39,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:39,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1535501221, now seen corresponding path program 1 times [2021-11-19 14:50:39,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:50:39,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397069374] [2021-11-19 14:50:39,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:39,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:50:39,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:39,576 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:50:39,576 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:50:39,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397069374] [2021-11-19 14:50:39,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397069374] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:39,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681722557] [2021-11-19 14:50:39,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:39,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:50:39,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:50:39,579 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:50:39,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 14:50:39,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:39,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 955 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:50:39,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:40,105 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:50:40,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:40,449 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 14:50:40,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681722557] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:40,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:50:40,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-19 14:50:40,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382811027] [2021-11-19 14:50:40,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:40,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:50:40,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:50:40,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:50:40,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:50:40,454 INFO L87 Difference]: Start difference. First operand 11635 states and 18225 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:50:41,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:41,644 INFO L93 Difference]: Finished difference Result 31420 states and 48538 transitions. [2021-11-19 14:50:41,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:50:41,645 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2021-11-19 14:50:41,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:41,775 INFO L225 Difference]: With dead ends: 31420 [2021-11-19 14:50:41,775 INFO L226 Difference]: Without dead ends: 21431 [2021-11-19 14:50:41,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 257 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:50:41,834 INFO L933 BasicCegarLoop]: 3301 mSDtfsCounter, 3503 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3503 SdHoareTripleChecker+Valid, 3518 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:41,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3503 Valid, 3518 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:50:41,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21431 states. [2021-11-19 14:50:43,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21431 to 21363. [2021-11-19 14:50:43,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21363 states, 18283 states have (on average 1.53361045780233) internal successors, (28039), 18350 states have internal predecessors, (28039), 2310 states have call successors, (2310), 769 states have call predecessors, (2310), 768 states have return successors, (2308), 2244 states have call predecessors, (2308), 2308 states have call successors, (2308) [2021-11-19 14:50:43,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21363 states to 21363 states and 32657 transitions. [2021-11-19 14:50:43,180 INFO L78 Accepts]: Start accepts. Automaton has 21363 states and 32657 transitions. Word has length 130 [2021-11-19 14:50:43,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:43,181 INFO L470 AbstractCegarLoop]: Abstraction has 21363 states and 32657 transitions. [2021-11-19 14:50:43,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:50:43,182 INFO L276 IsEmpty]: Start isEmpty. Operand 21363 states and 32657 transitions. [2021-11-19 14:50:43,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 14:50:43,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:43,237 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-11-19 14:50:43,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-19 14:50:43,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:50:43,450 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:43,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:43,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1608799581, now seen corresponding path program 1 times [2021-11-19 14:50:43,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:50:43,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314302020] [2021-11-19 14:50:43,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:43,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:50:43,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:43,642 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-19 14:50:43,643 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:50:43,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314302020] [2021-11-19 14:50:43,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314302020] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:50:43,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:50:43,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 14:50:43,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650547792] [2021-11-19 14:50:43,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:43,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:50:43,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:50:43,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:50:43,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:50:43,646 INFO L87 Difference]: Start difference. First operand 21363 states and 32657 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 14:50:46,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:46,045 INFO L93 Difference]: Finished difference Result 55355 states and 83479 transitions. [2021-11-19 14:50:46,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:50:46,046 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 130 [2021-11-19 14:50:46,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:46,268 INFO L225 Difference]: With dead ends: 55355 [2021-11-19 14:50:46,268 INFO L226 Difference]: Without dead ends: 35639 [2021-11-19 14:50:46,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:50:46,365 INFO L933 BasicCegarLoop]: 3331 mSDtfsCounter, 4170 mSDsluCounter, 7144 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4176 SdHoareTripleChecker+Valid, 9953 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:46,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4176 Valid, 9953 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 943 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:50:46,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35639 states. [2021-11-19 14:50:47,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35639 to 30963. [2021-11-19 14:50:47,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30963 states, 26379 states have (on average 1.5154099852155123) internal successors, (39975), 26478 states have internal predecessors, (39975), 3430 states have call successors, (3430), 1153 states have call predecessors, (3430), 1152 states have return successors, (3428), 3332 states have call predecessors, (3428), 3428 states have call successors, (3428) [2021-11-19 14:50:48,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30963 states to 30963 states and 46833 transitions. [2021-11-19 14:50:48,115 INFO L78 Accepts]: Start accepts. Automaton has 30963 states and 46833 transitions. Word has length 130 [2021-11-19 14:50:48,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:48,116 INFO L470 AbstractCegarLoop]: Abstraction has 30963 states and 46833 transitions. [2021-11-19 14:50:48,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 14:50:48,116 INFO L276 IsEmpty]: Start isEmpty. Operand 30963 states and 46833 transitions. [2021-11-19 14:50:48,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 14:50:48,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:48,188 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-11-19 14:50:48,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 14:50:48,188 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:48,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:48,189 INFO L85 PathProgramCache]: Analyzing trace with hash 243725470, now seen corresponding path program 1 times [2021-11-19 14:50:48,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:50:48,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548578393] [2021-11-19 14:50:48,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:48,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:50:48,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:48,339 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-19 14:50:48,339 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:50:48,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548578393] [2021-11-19 14:50:48,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548578393] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:50:48,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:50:48,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 14:50:48,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792706150] [2021-11-19 14:50:48,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:48,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:50:48,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:50:48,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:50:48,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:50:48,342 INFO L87 Difference]: Start difference. First operand 30963 states and 46833 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 14:50:51,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:51,763 INFO L93 Difference]: Finished difference Result 99579 states and 149272 transitions. [2021-11-19 14:50:51,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:50:51,764 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 131 [2021-11-19 14:50:51,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:52,338 INFO L225 Difference]: With dead ends: 99579 [2021-11-19 14:50:52,339 INFO L226 Difference]: Without dead ends: 70263 [2021-11-19 14:50:52,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:50:52,407 INFO L933 BasicCegarLoop]: 3309 mSDtfsCounter, 4211 mSDsluCounter, 7046 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4231 SdHoareTripleChecker+Valid, 9847 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:52,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4231 Valid, 9847 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:50:52,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70263 states. [2021-11-19 14:50:55,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70263 to 59123. [2021-11-19 14:50:55,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59123 states, 50155 states have (on average 1.494387399062905) internal successors, (74951), 50350 states have internal predecessors, (74951), 6662 states have call successors, (6662), 2305 states have call predecessors, (6662), 2304 states have return successors, (6660), 6468 states have call predecessors, (6660), 6660 states have call successors, (6660) [2021-11-19 14:50:55,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59123 states to 59123 states and 88273 transitions. [2021-11-19 14:50:55,657 INFO L78 Accepts]: Start accepts. Automaton has 59123 states and 88273 transitions. Word has length 131 [2021-11-19 14:50:55,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:55,659 INFO L470 AbstractCegarLoop]: Abstraction has 59123 states and 88273 transitions. [2021-11-19 14:50:55,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 14:50:55,660 INFO L276 IsEmpty]: Start isEmpty. Operand 59123 states and 88273 transitions. [2021-11-19 14:50:55,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-19 14:50:55,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:55,757 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-11-19 14:50:55,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 14:50:55,758 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:55,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:55,759 INFO L85 PathProgramCache]: Analyzing trace with hash -725345917, now seen corresponding path program 1 times [2021-11-19 14:50:55,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:50:55,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86983890] [2021-11-19 14:50:55,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:55,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:50:55,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:55,910 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-19 14:50:55,910 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:50:55,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86983890] [2021-11-19 14:50:55,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86983890] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:50:55,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:50:55,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 14:50:55,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975598522] [2021-11-19 14:50:55,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:55,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:50:55,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:50:55,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:50:55,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:50:55,915 INFO L87 Difference]: Start difference. First operand 59123 states and 88273 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 14:51:02,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:51:02,293 INFO L93 Difference]: Finished difference Result 202619 states and 300632 transitions. [2021-11-19 14:51:02,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:51:02,294 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 132 [2021-11-19 14:51:02,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:51:02,961 INFO L225 Difference]: With dead ends: 202619 [2021-11-19 14:51:02,962 INFO L226 Difference]: Without dead ends: 145143 [2021-11-19 14:51:03,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:51:03,455 INFO L933 BasicCegarLoop]: 3303 mSDtfsCounter, 4328 mSDsluCounter, 7056 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4348 SdHoareTripleChecker+Valid, 9848 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:51:03,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4348 Valid, 9848 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:51:03,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145143 states. [2021-11-19 14:51:08,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145143 to 114291. [2021-11-19 14:51:08,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114291 states, 96747 states have (on average 1.4798908493286613) internal successors, (143175), 97134 states have internal predecessors, (143175), 12934 states have call successors, (12934), 4609 states have call predecessors, (12934), 4608 states have return successors, (12932), 12548 states have call predecessors, (12932), 12932 states have call successors, (12932) [2021-11-19 14:51:09,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114291 states to 114291 states and 169041 transitions. [2021-11-19 14:51:09,219 INFO L78 Accepts]: Start accepts. Automaton has 114291 states and 169041 transitions. Word has length 132 [2021-11-19 14:51:09,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:51:09,220 INFO L470 AbstractCegarLoop]: Abstraction has 114291 states and 169041 transitions. [2021-11-19 14:51:09,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 14:51:09,221 INFO L276 IsEmpty]: Start isEmpty. Operand 114291 states and 169041 transitions. [2021-11-19 14:51:09,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-19 14:51:09,408 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:51:09,408 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 14:51:09,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 14:51:09,409 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:51:09,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:51:09,410 INFO L85 PathProgramCache]: Analyzing trace with hash 2038336066, now seen corresponding path program 1 times [2021-11-19 14:51:09,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:51:09,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725548855] [2021-11-19 14:51:09,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:09,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:51:09,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:09,538 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 38 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 14:51:09,538 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:51:09,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725548855] [2021-11-19 14:51:09,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725548855] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:51:09,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434828053] [2021-11-19 14:51:09,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:09,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:51:09,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:51:09,546 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:51:09,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567a9261-3f5d-4d29-a560-9052b25c6dc1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 14:51:09,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:09,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 1017 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:51:09,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:10,023 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 14:51:10,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:10,351 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-19 14:51:10,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434828053] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:51:10,351 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:51:10,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2021-11-19 14:51:10,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157083134] [2021-11-19 14:51:10,352 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:51:10,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:51:10,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:51:10,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:51:10,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:51:10,355 INFO L87 Difference]: Start difference. First operand 114291 states and 169041 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:51:16,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:51:16,205 INFO L93 Difference]: Finished difference Result 205431 states and 307028 transitions. [2021-11-19 14:51:16,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:51:16,206 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 155 [2021-11-19 14:51:16,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:51:16,914 INFO L225 Difference]: With dead ends: 205431 [2021-11-19 14:51:16,915 INFO L226 Difference]: Without dead ends: 147571 [2021-11-19 14:51:17,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:51:17,028 INFO L933 BasicCegarLoop]: 3407 mSDtfsCounter, 233 mSDsluCounter, 3551 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 6704 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:51:17,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 6704 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:51:17,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147571 states.