./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.06.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.06.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF --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 446a871a3cd47ea45eeb885eff35eb33cc93ddc5fa339490f1703fb03f5dc129 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:34:20,493 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:34:20,497 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:34:20,556 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:34:20,557 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:34:20,562 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:34:20,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:34:20,568 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:34:20,571 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:34:20,577 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:34:20,578 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:34:20,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:34:20,581 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:34:20,584 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:34:20,587 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:34:20,592 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:34:20,594 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:34:20,595 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:34:20,598 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:34:20,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:34:20,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:34:20,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:34:20,614 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:34:20,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:34:20,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:34:20,626 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:34:20,626 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:34:20,629 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:34:20,629 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:34:20,631 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:34:20,631 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:34:20,633 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:34:20,635 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:34:20,637 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:34:20,639 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:34:20,639 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:34:20,640 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:34:20,640 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:34:20,641 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:34:20,642 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:34:20,643 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:34:20,644 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 02:34:20,693 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:34:20,694 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:34:20,695 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:34:20,695 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:34:20,696 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:34:20,696 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:34:20,696 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:34:20,697 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:34:20,703 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:34:20,704 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:34:20,705 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:34:20,705 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:34:20,705 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:34:20,706 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:34:20,706 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:34:20,706 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:34:20,707 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:34:20,707 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:34:20,708 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:34:20,708 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:34:20,708 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:34:20,708 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:34:20,709 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:34:20,709 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:34:20,709 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:34:20,709 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:34:20,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:34:20,710 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:34:20,710 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:34:20,712 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:34:20,712 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:34:20,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:34:20,713 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:34:20,713 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:34:20,714 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:34:20,714 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:34:20,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:34:20,714 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:34:20,715 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:34:20,715 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:34:20,715 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_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 446a871a3cd47ea45eeb885eff35eb33cc93ddc5fa339490f1703fb03f5dc129 [2021-11-13 02:34:21,070 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:34:21,091 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:34:21,094 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:34:21,096 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:34:21,097 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:34:21,098 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.06.cil-1.c [2021-11-13 02:34:21,181 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/data/606dd13f3/07a00c334d9e424ab1084986ffad81b3/FLAGefa5892d3 [2021-11-13 02:34:22,388 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:34:22,390 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/sv-benchmarks/c/combinations/Problem05_label49+token_ring.06.cil-1.c [2021-11-13 02:34:22,450 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/data/606dd13f3/07a00c334d9e424ab1084986ffad81b3/FLAGefa5892d3 [2021-11-13 02:34:22,600 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/data/606dd13f3/07a00c334d9e424ab1084986ffad81b3 [2021-11-13 02:34:22,603 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:34:22,605 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:34:22,610 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:34:22,610 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:34:22,614 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:34:22,615 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:34:22" (1/1) ... [2021-11-13 02:34:22,616 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1756343d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:22, skipping insertion in model container [2021-11-13 02:34:22,617 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:34:22" (1/1) ... [2021-11-13 02:34:22,624 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:34:22,923 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:34:25,431 WARN L228 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_e9105030-4056-47bc-b82f-1e37bea5515a/sv-benchmarks/c/combinations/Problem05_label49+token_ring.06.cil-1.c[380593,380606] [2021-11-13 02:34:25,472 WARN L228 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_e9105030-4056-47bc-b82f-1e37bea5515a/sv-benchmarks/c/combinations/Problem05_label49+token_ring.06.cil-1.c[383339,383352] [2021-11-13 02:34:25,815 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:34:25,827 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:34:27,098 WARN L228 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_e9105030-4056-47bc-b82f-1e37bea5515a/sv-benchmarks/c/combinations/Problem05_label49+token_ring.06.cil-1.c[380593,380606] [2021-11-13 02:34:27,120 WARN L228 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_e9105030-4056-47bc-b82f-1e37bea5515a/sv-benchmarks/c/combinations/Problem05_label49+token_ring.06.cil-1.c[383339,383352] [2021-11-13 02:34:27,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:34:27,206 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:34:27,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:27 WrapperNode [2021-11-13 02:34:27,207 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:34:27,208 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:34:27,209 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:34:27,209 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:34:27,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:27" (1/1) ... [2021-11-13 02:34:27,352 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:27" (1/1) ... [2021-11-13 02:34:27,821 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:34:27,822 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:34:27,822 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:34:27,822 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:34:27,831 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:27" (1/1) ... [2021-11-13 02:34:27,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:27" (1/1) ... [2021-11-13 02:34:27,957 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:27" (1/1) ... [2021-11-13 02:34:27,958 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:27" (1/1) ... [2021-11-13 02:34:28,122 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:27" (1/1) ... [2021-11-13 02:34:28,181 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:27" (1/1) ... [2021-11-13 02:34:28,206 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:27" (1/1) ... [2021-11-13 02:34:28,270 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:34:28,272 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:34:28,272 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:34:28,272 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:34:28,273 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:27" (1/1) ... [2021-11-13 02:34:28,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:34:28,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:34:28,312 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:34:28,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:34:28,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:34:28,368 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-13 02:34:28,368 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-13 02:34:28,369 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-13 02:34:28,369 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-13 02:34:28,369 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-13 02:34:28,369 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-13 02:34:28,369 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-11-13 02:34:28,370 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-11-13 02:34:28,370 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-13 02:34:28,370 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-13 02:34:28,370 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-13 02:34:28,370 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-13 02:34:28,370 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-13 02:34:28,371 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-13 02:34:28,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 02:34:28,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:34:28,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:34:39,239 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:34:39,240 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-13 02:34:39,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:34:39 BoogieIcfgContainer [2021-11-13 02:34:39,247 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:34:39,250 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:34:39,251 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:34:39,255 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:34:39,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:34:22" (1/3) ... [2021-11-13 02:34:39,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7248b161 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:34:39, skipping insertion in model container [2021-11-13 02:34:39,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:34:27" (2/3) ... [2021-11-13 02:34:39,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7248b161 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:34:39, skipping insertion in model container [2021-11-13 02:34:39,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:34:39" (3/3) ... [2021-11-13 02:34:39,259 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.06.cil-1.c [2021-11-13 02:34:39,265 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:34:39,265 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-13 02:34:39,341 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:34:39,351 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 [2021-11-13 02:34:39,351 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-13 02:34:39,409 INFO L276 IsEmpty]: Start isEmpty. Operand has 1771 states, 1739 states have (on average 1.968372627947096) internal successors, (3423), 1744 states have internal predecessors, (3423), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-13 02:34:39,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-13 02:34:39,419 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:39,419 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] [2021-11-13 02:34:39,420 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:39,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:39,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1415769424, now seen corresponding path program 1 times [2021-11-13 02:34:39,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:34:39,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696847023] [2021-11-13 02:34:39,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:39,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:34:39,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:39,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:39,884 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:34:39,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696847023] [2021-11-13 02:34:39,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696847023] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:39,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:39,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:34:39,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282913270] [2021-11-13 02:34:39,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:39,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:34:39,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:34:39,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:34:39,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:34:39,944 INFO L87 Difference]: Start difference. First operand has 1771 states, 1739 states have (on average 1.968372627947096) internal successors, (3423), 1744 states have internal predecessors, (3423), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2021-11-13 02:34:40,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:40,996 INFO L93 Difference]: Finished difference Result 3646 states and 7111 transitions. [2021-11-13 02:34:40,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:34:41,000 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 50 [2021-11-13 02:34:41,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:41,034 INFO L225 Difference]: With dead ends: 3646 [2021-11-13 02:34:41,034 INFO L226 Difference]: Without dead ends: 1874 [2021-11-13 02:34:41,043 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 [2021-11-13 02:34:41,047 INFO L933 BasicCegarLoop]: 3338 mSDtfsCounter, 3589 mSDsluCounter, 3535 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 554.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3589 SdHoareTripleChecker+Valid, 6600 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 49.30ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 776.58ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:41,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3589 Valid, 6600 Invalid, 648 Unknown, 0 Unchecked, 49.30ms Time], IncrementalHoareTripleChecker [14 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 776.58ms Time] [2021-11-13 02:34:41,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2021-11-13 02:34:41,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1873. [2021-11-13 02:34:41,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1821 states have (on average 1.9406919275123558) internal successors, (3534), 1825 states have internal predecessors, (3534), 38 states have call successors, (38), 13 states have call predecessors, (38), 12 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2021-11-13 02:34:41,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 3608 transitions. [2021-11-13 02:34:41,219 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 3608 transitions. Word has length 50 [2021-11-13 02:34:41,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:41,223 INFO L470 AbstractCegarLoop]: Abstraction has 1873 states and 3608 transitions. [2021-11-13 02:34:41,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2021-11-13 02:34:41,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 3608 transitions. [2021-11-13 02:34:41,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-13 02:34:41,241 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:41,244 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:41,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 02:34:41,244 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:41,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:41,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1378952097, now seen corresponding path program 1 times [2021-11-13 02:34:41,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:34:41,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929470768] [2021-11-13 02:34:41,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:41,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:34:41,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:41,466 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 02:34:41,466 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:34:41,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929470768] [2021-11-13 02:34:41,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929470768] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:34:41,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382334075] [2021-11-13 02:34:41,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:41,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:41,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:34:41,480 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:34:41,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 02:34:41,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:41,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:34:41,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:41,963 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 02:34:41,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:42,167 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-13 02:34:42,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382334075] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:34:42,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:34:42,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-13 02:34:42,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082517320] [2021-11-13 02:34:42,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:42,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:34:42,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:34:42,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:34:42,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:34:42,180 INFO L87 Difference]: Start difference. First operand 1873 states and 3608 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 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) [2021-11-13 02:34:42,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:42,722 INFO L93 Difference]: Finished difference Result 2320 states and 4279 transitions. [2021-11-13 02:34:42,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:34:42,723 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 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 95 [2021-11-13 02:34:42,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:42,761 INFO L225 Difference]: With dead ends: 2320 [2021-11-13 02:34:42,762 INFO L226 Difference]: Without dead ends: 2093 [2021-11-13 02:34:42,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:34:42,765 INFO L933 BasicCegarLoop]: 3255 mSDtfsCounter, 3419 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 347.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3419 SdHoareTripleChecker+Valid, 3397 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.08ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 427.49ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:42,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3419 Valid, 3397 Invalid, 285 Unknown, 0 Unchecked, 19.08ms Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 427.49ms Time] [2021-11-13 02:34:42,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2021-11-13 02:34:42,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 2087. [2021-11-13 02:34:42,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2087 states, 1993 states have (on average 1.8991470145509282) internal successors, (3785), 1998 states have internal predecessors, (3785), 68 states have call successors, (68), 25 states have call predecessors, (68), 24 states have return successors, (66), 64 states have call predecessors, (66), 66 states have call successors, (66) [2021-11-13 02:34:42,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 3919 transitions. [2021-11-13 02:34:42,892 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 3919 transitions. Word has length 95 [2021-11-13 02:34:42,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:42,893 INFO L470 AbstractCegarLoop]: Abstraction has 2087 states and 3919 transitions. [2021-11-13 02:34:42,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 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) [2021-11-13 02:34:42,893 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 3919 transitions. [2021-11-13 02:34:42,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-13 02:34:42,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:42,898 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:42,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:43,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:43,111 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:43,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:43,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1835530559, now seen corresponding path program 1 times [2021-11-13 02:34:43,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:34:43,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778852655] [2021-11-13 02:34:43,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:43,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:34:43,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:43,253 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 02:34:43,254 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:34:43,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778852655] [2021-11-13 02:34:43,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778852655] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:34:43,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71054807] [2021-11-13 02:34:43,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:43,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:43,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:34:43,258 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:34:43,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 02:34:43,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:43,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:34:43,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:43,709 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:34:43,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:43,994 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 02:34:43,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71054807] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:34:43,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:34:43,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-13 02:34:43,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70988000] [2021-11-13 02:34:43,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:43,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:34:43,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:34:43,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:34:43,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:34:43,998 INFO L87 Difference]: Start difference. First operand 2087 states and 3919 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 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) [2021-11-13 02:34:44,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:44,569 INFO L93 Difference]: Finished difference Result 2956 states and 5218 transitions. [2021-11-13 02:34:44,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:34:44,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 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 95 [2021-11-13 02:34:44,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:44,595 INFO L225 Difference]: With dead ends: 2956 [2021-11-13 02:34:44,595 INFO L226 Difference]: Without dead ends: 2515 [2021-11-13 02:34:44,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:34:44,604 INFO L933 BasicCegarLoop]: 3254 mSDtfsCounter, 3428 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 350.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3428 SdHoareTripleChecker+Valid, 3396 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.74ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 436.04ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:44,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3428 Valid, 3396 Invalid, 285 Unknown, 0 Unchecked, 12.74ms Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 436.04ms Time] [2021-11-13 02:34:44,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2515 states. [2021-11-13 02:34:44,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2515 to 2507. [2021-11-13 02:34:44,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2507 states, 2331 states have (on average 1.833976833976834) internal successors, (4275), 2338 states have internal predecessors, (4275), 126 states have call successors, (126), 49 states have call predecessors, (126), 48 states have return successors, (124), 120 states have call predecessors, (124), 124 states have call successors, (124) [2021-11-13 02:34:44,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2507 states to 2507 states and 4525 transitions. [2021-11-13 02:34:44,751 INFO L78 Accepts]: Start accepts. Automaton has 2507 states and 4525 transitions. Word has length 95 [2021-11-13 02:34:44,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:44,753 INFO L470 AbstractCegarLoop]: Abstraction has 2507 states and 4525 transitions. [2021-11-13 02:34:44,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 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) [2021-11-13 02:34:44,753 INFO L276 IsEmpty]: Start isEmpty. Operand 2507 states and 4525 transitions. [2021-11-13 02:34:44,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-13 02:34:44,760 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:44,760 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:44,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:44,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-13 02:34:44,983 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:44,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:44,984 INFO L85 PathProgramCache]: Analyzing trace with hash 225355681, now seen corresponding path program 1 times [2021-11-13 02:34:44,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:34:44,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921413553] [2021-11-13 02:34:44,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:44,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:34:45,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:45,080 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 02:34:45,080 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:34:45,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921413553] [2021-11-13 02:34:45,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921413553] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:34:45,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435071967] [2021-11-13 02:34:45,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:45,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:45,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:34:45,082 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:34:45,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 02:34:45,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:45,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:34:45,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:45,449 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 02:34:45,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:45,709 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-13 02:34:45,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435071967] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:34:45,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:34:45,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-13 02:34:45,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851544098] [2021-11-13 02:34:45,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:45,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:34:45,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:34:45,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:34:45,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:34:45,715 INFO L87 Difference]: Start difference. First operand 2507 states and 4525 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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) [2021-11-13 02:34:46,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:46,278 INFO L93 Difference]: Finished difference Result 4204 states and 7046 transitions. [2021-11-13 02:34:46,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:34:46,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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 95 [2021-11-13 02:34:46,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:46,309 INFO L225 Difference]: With dead ends: 4204 [2021-11-13 02:34:46,310 INFO L226 Difference]: Without dead ends: 3343 [2021-11-13 02:34:46,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:34:46,439 INFO L933 BasicCegarLoop]: 3221 mSDtfsCounter, 3425 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 344.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3425 SdHoareTripleChecker+Valid, 3363 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.23ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 415.78ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:46,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3425 Valid, 3363 Invalid, 281 Unknown, 0 Unchecked, 10.23ms Time], IncrementalHoareTripleChecker [2 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 415.78ms Time] [2021-11-13 02:34:46,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3343 states. [2021-11-13 02:34:46,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3343 to 3331. [2021-11-13 02:34:46,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3331 states, 2995 states have (on average 1.7465776293823039) internal successors, (5231), 3006 states have internal predecessors, (5231), 238 states have call successors, (238), 97 states have call predecessors, (238), 96 states have return successors, (236), 228 states have call predecessors, (236), 236 states have call successors, (236) [2021-11-13 02:34:46,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3331 states to 3331 states and 5705 transitions. [2021-11-13 02:34:46,612 INFO L78 Accepts]: Start accepts. Automaton has 3331 states and 5705 transitions. Word has length 95 [2021-11-13 02:34:46,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:46,613 INFO L470 AbstractCegarLoop]: Abstraction has 3331 states and 5705 transitions. [2021-11-13 02:34:46,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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) [2021-11-13 02:34:46,614 INFO L276 IsEmpty]: Start isEmpty. Operand 3331 states and 5705 transitions. [2021-11-13 02:34:46,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-13 02:34:46,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:46,621 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:46,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:46,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:46,847 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:46,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:46,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1398361407, now seen corresponding path program 1 times [2021-11-13 02:34:46,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:34:46,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21860230] [2021-11-13 02:34:46,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:46,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:34:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:46,969 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 02:34:46,969 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:34:46,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21860230] [2021-11-13 02:34:46,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21860230] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:46,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:46,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:34:46,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191022470] [2021-11-13 02:34:46,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:46,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:34:46,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:34:46,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:34:46,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:34:46,972 INFO L87 Difference]: Start difference. First operand 3331 states and 5705 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 02:34:47,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:47,641 INFO L93 Difference]: Finished difference Result 4647 states and 7668 transitions. [2021-11-13 02:34:47,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:34:47,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 95 [2021-11-13 02:34:47,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:47,673 INFO L225 Difference]: With dead ends: 4647 [2021-11-13 02:34:47,674 INFO L226 Difference]: Without dead ends: 3771 [2021-11-13 02:34:47,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:34:47,682 INFO L933 BasicCegarLoop]: 3283 mSDtfsCounter, 73 mSDsluCounter, 3452 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 406.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 6496 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.83ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 492.79ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:47,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 6496 Invalid, 506 Unknown, 0 Unchecked, 11.83ms Time], IncrementalHoareTripleChecker [0 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 492.79ms Time] [2021-11-13 02:34:47,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3771 states. [2021-11-13 02:34:47,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3771 to 3615. [2021-11-13 02:34:47,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3615 states, 3263 states have (on average 1.7428746552252528) internal successors, (5687), 3274 states have internal predecessors, (5687), 246 states have call successors, (246), 105 states have call predecessors, (246), 104 states have return successors, (244), 236 states have call predecessors, (244), 244 states have call successors, (244) [2021-11-13 02:34:47,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3615 states to 3615 states and 6177 transitions. [2021-11-13 02:34:47,881 INFO L78 Accepts]: Start accepts. Automaton has 3615 states and 6177 transitions. Word has length 95 [2021-11-13 02:34:47,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:47,885 INFO L470 AbstractCegarLoop]: Abstraction has 3615 states and 6177 transitions. [2021-11-13 02:34:47,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 02:34:47,885 INFO L276 IsEmpty]: Start isEmpty. Operand 3615 states and 6177 transitions. [2021-11-13 02:34:47,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-13 02:34:47,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:47,897 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:47,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 02:34:47,898 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:47,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:47,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1904805552, now seen corresponding path program 1 times [2021-11-13 02:34:47,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:34:47,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410547091] [2021-11-13 02:34:47,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:47,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:34:47,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:48,023 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-13 02:34:48,024 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:34:48,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410547091] [2021-11-13 02:34:48,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410547091] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:48,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:48,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:34:48,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997770300] [2021-11-13 02:34:48,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:48,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:34:48,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:34:48,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:34:48,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:34:48,027 INFO L87 Difference]: Start difference. First operand 3615 states and 6177 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 02:34:48,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:48,747 INFO L93 Difference]: Finished difference Result 7480 states and 11970 transitions. [2021-11-13 02:34:48,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:34:48,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 127 [2021-11-13 02:34:48,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:48,792 INFO L225 Difference]: With dead ends: 7480 [2021-11-13 02:34:48,792 INFO L226 Difference]: Without dead ends: 5511 [2021-11-13 02:34:48,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:34:48,805 INFO L933 BasicCegarLoop]: 3223 mSDtfsCounter, 3417 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 358.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3417 SdHoareTripleChecker+Valid, 3365 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.39ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 460.32ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:48,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3417 Valid, 3365 Invalid, 279 Unknown, 0 Unchecked, 10.39ms Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 460.32ms Time] [2021-11-13 02:34:48,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5511 states. [2021-11-13 02:34:49,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5511 to 5483. [2021-11-13 02:34:49,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5483 states, 4803 states have (on average 1.6537580678742452) internal successors, (7943), 4822 states have internal predecessors, (7943), 470 states have call successors, (470), 209 states have call predecessors, (470), 208 states have return successors, (468), 452 states have call predecessors, (468), 468 states have call successors, (468) [2021-11-13 02:34:49,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5483 states to 5483 states and 8881 transitions. [2021-11-13 02:34:49,135 INFO L78 Accepts]: Start accepts. Automaton has 5483 states and 8881 transitions. Word has length 127 [2021-11-13 02:34:49,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:49,135 INFO L470 AbstractCegarLoop]: Abstraction has 5483 states and 8881 transitions. [2021-11-13 02:34:49,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 02:34:49,137 INFO L276 IsEmpty]: Start isEmpty. Operand 5483 states and 8881 transitions. [2021-11-13 02:34:49,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-13 02:34:49,154 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:49,155 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:49,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 02:34:49,155 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:49,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:49,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1703604669, now seen corresponding path program 1 times [2021-11-13 02:34:49,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:34:49,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420379224] [2021-11-13 02:34:49,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:49,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:34:49,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:49,252 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-13 02:34:49,252 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:34:49,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420379224] [2021-11-13 02:34:49,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420379224] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:49,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:49,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:34:49,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284196606] [2021-11-13 02:34:49,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:49,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:34:49,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:34:49,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:34:49,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:34:49,256 INFO L87 Difference]: Start difference. First operand 5483 states and 8881 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 02:34:50,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:50,033 INFO L93 Difference]: Finished difference Result 13012 states and 20058 transitions. [2021-11-13 02:34:50,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:34:50,034 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 127 [2021-11-13 02:34:50,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:50,119 INFO L225 Difference]: With dead ends: 13012 [2021-11-13 02:34:50,119 INFO L226 Difference]: Without dead ends: 9175 [2021-11-13 02:34:50,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:34:50,143 INFO L933 BasicCegarLoop]: 3223 mSDtfsCounter, 3419 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 336.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3419 SdHoareTripleChecker+Valid, 3365 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.98ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 405.15ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:50,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3419 Valid, 3365 Invalid, 279 Unknown, 0 Unchecked, 8.98ms Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 405.15ms Time] [2021-11-13 02:34:50,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9175 states. [2021-11-13 02:34:50,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9175 to 9123. [2021-11-13 02:34:50,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9123 states, 7803 states have (on average 1.575676022042804) internal successors, (12295), 7838 states have internal predecessors, (12295), 902 states have call successors, (902), 417 states have call predecessors, (902), 416 states have return successors, (900), 868 states have call predecessors, (900), 900 states have call successors, (900) [2021-11-13 02:34:50,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9123 states to 9123 states and 14097 transitions. [2021-11-13 02:34:50,826 INFO L78 Accepts]: Start accepts. Automaton has 9123 states and 14097 transitions. Word has length 127 [2021-11-13 02:34:50,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:50,828 INFO L470 AbstractCegarLoop]: Abstraction has 9123 states and 14097 transitions. [2021-11-13 02:34:50,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 02:34:50,829 INFO L276 IsEmpty]: Start isEmpty. Operand 9123 states and 14097 transitions. [2021-11-13 02:34:50,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-13 02:34:50,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:50,863 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:50,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 02:34:50,864 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:50,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:50,865 INFO L85 PathProgramCache]: Analyzing trace with hash 731720327, now seen corresponding path program 1 times [2021-11-13 02:34:50,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:34:50,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814527547] [2021-11-13 02:34:50,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:50,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:34:50,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:50,968 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-13 02:34:50,969 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:34:50,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814527547] [2021-11-13 02:34:50,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814527547] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:50,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:50,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:34:50,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680519174] [2021-11-13 02:34:50,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:50,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:34:50,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:34:50,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:34:50,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:34:50,972 INFO L87 Difference]: Start difference. First operand 9123 states and 14097 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 02:34:51,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:51,879 INFO L93 Difference]: Finished difference Result 23788 states and 35642 transitions. [2021-11-13 02:34:51,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:34:51,879 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 127 [2021-11-13 02:34:51,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:51,960 INFO L225 Difference]: With dead ends: 23788 [2021-11-13 02:34:51,960 INFO L226 Difference]: Without dead ends: 16311 [2021-11-13 02:34:52,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:34:52,001 INFO L933 BasicCegarLoop]: 3238 mSDtfsCounter, 3422 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 314.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3422 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.50ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 379.04ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:52,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3422 Valid, 3380 Invalid, 280 Unknown, 0 Unchecked, 8.50ms Time], IncrementalHoareTripleChecker [2 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 379.04ms Time] [2021-11-13 02:34:52,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16311 states. [2021-11-13 02:34:52,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16311 to 16211. [2021-11-13 02:34:52,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16211 states, 13643 states have (on average 1.5157223484570843) internal successors, (20679), 13710 states have internal predecessors, (20679), 1734 states have call successors, (1734), 833 states have call predecessors, (1734), 832 states have return successors, (1732), 1668 states have call predecessors, (1732), 1732 states have call successors, (1732) [2021-11-13 02:34:52,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16211 states to 16211 states and 24145 transitions. [2021-11-13 02:34:52,683 INFO L78 Accepts]: Start accepts. Automaton has 16211 states and 24145 transitions. Word has length 127 [2021-11-13 02:34:52,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:52,683 INFO L470 AbstractCegarLoop]: Abstraction has 16211 states and 24145 transitions. [2021-11-13 02:34:52,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 02:34:52,684 INFO L276 IsEmpty]: Start isEmpty. Operand 16211 states and 24145 transitions. [2021-11-13 02:34:52,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-13 02:34:52,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:52,750 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:52,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 02:34:52,751 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:52,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:52,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1759001705, now seen corresponding path program 1 times [2021-11-13 02:34:52,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:34:52,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346103714] [2021-11-13 02:34:52,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:52,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:34:52,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:52,863 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 02:34:52,863 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:34:52,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346103714] [2021-11-13 02:34:52,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346103714] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:34:52,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826095775] [2021-11-13 02:34:52,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:52,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:52,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:34:52,867 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:34:52,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 02:34:53,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:53,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:34:53,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:53,381 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:34:53,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:53,706 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-13 02:34:53,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826095775] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:34:53,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:34:53,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 4] total 8 [2021-11-13 02:34:53,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350303434] [2021-11-13 02:34:53,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:53,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:34:53,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:34:53,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:34:53,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:34:53,710 INFO L87 Difference]: Start difference. First operand 16211 states and 24145 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 02:34:54,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:54,815 INFO L93 Difference]: Finished difference Result 23755 states and 35511 transitions. [2021-11-13 02:34:54,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:34:54,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 146 [2021-11-13 02:34:54,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:54,880 INFO L225 Difference]: With dead ends: 23755 [2021-11-13 02:34:54,880 INFO L226 Difference]: Without dead ends: 16279 [2021-11-13 02:34:54,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:34:54,909 INFO L933 BasicCegarLoop]: 3332 mSDtfsCounter, 140 mSDsluCounter, 3440 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 401.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 6532 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.69ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 488.90ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:54,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 6532 Invalid, 516 Unknown, 0 Unchecked, 10.69ms Time], IncrementalHoareTripleChecker [2 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 488.90ms Time] [2021-11-13 02:34:54,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16279 states. [2021-11-13 02:34:55,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16279 to 16147. [2021-11-13 02:34:55,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16147 states, 13579 states have (on average 1.4993003903085647) internal successors, (20359), 13646 states have internal predecessors, (20359), 1734 states have call successors, (1734), 833 states have call predecessors, (1734), 832 states have return successors, (1732), 1668 states have call predecessors, (1732), 1732 states have call successors, (1732) [2021-11-13 02:34:55,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16147 states to 16147 states and 23825 transitions. [2021-11-13 02:34:55,584 INFO L78 Accepts]: Start accepts. Automaton has 16147 states and 23825 transitions. Word has length 146 [2021-11-13 02:34:55,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:55,585 INFO L470 AbstractCegarLoop]: Abstraction has 16147 states and 23825 transitions. [2021-11-13 02:34:55,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 02:34:55,586 INFO L276 IsEmpty]: Start isEmpty. Operand 16147 states and 23825 transitions. [2021-11-13 02:34:55,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-13 02:34:55,648 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:55,648 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:55,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:55,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:55,871 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:55,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:55,871 INFO L85 PathProgramCache]: Analyzing trace with hash 912764745, now seen corresponding path program 1 times [2021-11-13 02:34:55,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:34:55,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811935008] [2021-11-13 02:34:55,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:55,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:34:55,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:55,976 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 02:34:55,978 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:34:55,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811935008] [2021-11-13 02:34:55,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811935008] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:34:55,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274199892] [2021-11-13 02:34:55,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:55,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:55,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:34:55,983 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:34:56,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 02:34:56,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:56,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:34:56,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:56,581 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 02:34:56,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:56,862 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-13 02:34:56,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274199892] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:56,862 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:34:56,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 8 [2021-11-13 02:34:56,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138812692] [2021-11-13 02:34:56,863 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:56,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:34:56,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:34:56,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:34:56,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:34:56,865 INFO L87 Difference]: Start difference. First operand 16147 states and 23825 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 02:34:58,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:58,002 INFO L93 Difference]: Finished difference Result 23659 states and 35031 transitions. [2021-11-13 02:34:58,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:34:58,003 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 146 [2021-11-13 02:34:58,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:58,070 INFO L225 Difference]: With dead ends: 23659 [2021-11-13 02:34:58,070 INFO L226 Difference]: Without dead ends: 16215 [2021-11-13 02:34:58,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:34:58,107 INFO L933 BasicCegarLoop]: 3340 mSDtfsCounter, 3577 mSDsluCounter, 3532 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 493.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3577 SdHoareTripleChecker+Valid, 6606 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.28ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 603.12ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:58,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3577 Valid, 6606 Invalid, 625 Unknown, 0 Unchecked, 24.28ms Time], IncrementalHoareTripleChecker [3 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 603.12ms Time] [2021-11-13 02:34:58,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16215 states. [2021-11-13 02:34:58,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16215 to 16083. [2021-11-13 02:34:58,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16083 states, 13515 states have (on average 1.482722900480947) internal successors, (20039), 13582 states have internal predecessors, (20039), 1734 states have call successors, (1734), 833 states have call predecessors, (1734), 832 states have return successors, (1732), 1668 states have call predecessors, (1732), 1732 states have call successors, (1732) [2021-11-13 02:34:58,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16083 states to 16083 states and 23505 transitions. [2021-11-13 02:34:58,785 INFO L78 Accepts]: Start accepts. Automaton has 16083 states and 23505 transitions. Word has length 146 [2021-11-13 02:34:58,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:58,786 INFO L470 AbstractCegarLoop]: Abstraction has 16083 states and 23505 transitions. [2021-11-13 02:34:58,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 02:34:58,787 INFO L276 IsEmpty]: Start isEmpty. Operand 16083 states and 23505 transitions. [2021-11-13 02:34:58,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-13 02:34:58,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:58,828 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:58,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:59,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-13 02:34:59,055 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:59,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:59,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1617385942, now seen corresponding path program 1 times [2021-11-13 02:34:59,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:34:59,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120686361] [2021-11-13 02:34:59,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:59,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:34:59,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:59,150 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 02:34:59,151 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:34:59,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120686361] [2021-11-13 02:34:59,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120686361] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:34:59,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607495020] [2021-11-13 02:34:59,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:59,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:59,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:34:59,155 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:34:59,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 02:34:59,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:59,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:34:59,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:59,649 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-13 02:34:59,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:59,940 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 02:34:59,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607495020] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:59,940 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:34:59,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 8 [2021-11-13 02:34:59,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585397608] [2021-11-13 02:34:59,941 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:59,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:34:59,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:34:59,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:34:59,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:34:59,943 INFO L87 Difference]: Start difference. First operand 16083 states and 23505 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 02:35:01,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:35:01,256 INFO L93 Difference]: Finished difference Result 27201 states and 38574 transitions. [2021-11-13 02:35:01,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:35:01,256 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 146 [2021-11-13 02:35:01,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:35:01,342 INFO L225 Difference]: With dead ends: 27201 [2021-11-13 02:35:01,343 INFO L226 Difference]: Without dead ends: 19853 [2021-11-13 02:35:01,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:35:01,371 INFO L933 BasicCegarLoop]: 3243 mSDtfsCounter, 3451 mSDsluCounter, 3443 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 459.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3451 SdHoareTripleChecker+Valid, 6441 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.97ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 557.38ms IncrementalHoareTripleChecker+Time [2021-11-13 02:35:01,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3451 Valid, 6441 Invalid, 556 Unknown, 0 Unchecked, 17.97ms Time], IncrementalHoareTripleChecker [5 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 557.38ms Time] [2021-11-13 02:35:01,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19853 states. [2021-11-13 02:35:02,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19853 to 19853. [2021-11-13 02:35:02,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19853 states, 16905 states have (on average 1.4237799467613133) internal successors, (24069), 16972 states have internal predecessors, (24069), 1860 states have call successors, (1860), 1087 states have call predecessors, (1860), 1086 states have return successors, (1858), 1794 states have call predecessors, (1858), 1858 states have call successors, (1858) [2021-11-13 02:35:02,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19853 states to 19853 states and 27787 transitions. [2021-11-13 02:35:02,394 INFO L78 Accepts]: Start accepts. Automaton has 19853 states and 27787 transitions. Word has length 146 [2021-11-13 02:35:02,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:35:02,395 INFO L470 AbstractCegarLoop]: Abstraction has 19853 states and 27787 transitions. [2021-11-13 02:35:02,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 02:35:02,395 INFO L276 IsEmpty]: Start isEmpty. Operand 19853 states and 27787 transitions. [2021-11-13 02:35:02,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-13 02:35:02,451 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:35:02,452 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:35:02,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 02:35:02,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:35:02,671 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:35:02,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:35:02,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1953330758, now seen corresponding path program 1 times [2021-11-13 02:35:02,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:35:02,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802918183] [2021-11-13 02:35:02,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:02,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:35:02,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:02,782 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 02:35:02,782 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:35:02,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802918183] [2021-11-13 02:35:02,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802918183] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:35:02,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504365176] [2021-11-13 02:35:02,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:02,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:35:02,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:35:02,787 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:35:02,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 02:35:02,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:02,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:35:02,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:03,290 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-13 02:35:03,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:03,596 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-13 02:35:03,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504365176] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:35:03,597 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:35:03,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2021-11-13 02:35:03,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077478934] [2021-11-13 02:35:03,598 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:35:03,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:35:03,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:35:03,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:35:03,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:35:03,600 INFO L87 Difference]: Start difference. First operand 19853 states and 27787 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-13 02:35:05,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:35:05,020 INFO L93 Difference]: Finished difference Result 44457 states and 61892 transitions. [2021-11-13 02:35:05,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:35:05,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 146 [2021-11-13 02:35:05,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:35:05,149 INFO L225 Difference]: With dead ends: 44457 [2021-11-13 02:35:05,149 INFO L226 Difference]: Without dead ends: 26251 [2021-11-13 02:35:05,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:35:05,196 INFO L933 BasicCegarLoop]: 3230 mSDtfsCounter, 80 mSDsluCounter, 3434 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 349.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 6427 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.49ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 422.06ms IncrementalHoareTripleChecker+Time [2021-11-13 02:35:05,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 6427 Invalid, 492 Unknown, 0 Unchecked, 17.49ms Time], IncrementalHoareTripleChecker [2 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 422.06ms Time] [2021-11-13 02:35:05,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26251 states. [2021-11-13 02:35:06,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26251 to 21813. [2021-11-13 02:35:06,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21813 states, 18733 states have (on average 1.44563070517269) internal successors, (27081), 18801 states have internal predecessors, (27081), 1926 states have call successors, (1926), 1153 states have call predecessors, (1926), 1152 states have return successors, (1924), 1859 states have call predecessors, (1924), 1924 states have call successors, (1924) [2021-11-13 02:35:06,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21813 states to 21813 states and 30931 transitions. [2021-11-13 02:35:06,270 INFO L78 Accepts]: Start accepts. Automaton has 21813 states and 30931 transitions. Word has length 146 [2021-11-13 02:35:06,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:35:06,271 INFO L470 AbstractCegarLoop]: Abstraction has 21813 states and 30931 transitions. [2021-11-13 02:35:06,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-13 02:35:06,271 INFO L276 IsEmpty]: Start isEmpty. Operand 21813 states and 30931 transitions. [2021-11-13 02:35:06,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-13 02:35:06,324 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:35:06,325 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:35:06,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 02:35:06,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-13 02:35:06,551 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:35:06,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:35:06,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1356239262, now seen corresponding path program 2 times [2021-11-13 02:35:06,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:35:06,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409539492] [2021-11-13 02:35:06,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:06,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:35:06,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:06,654 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-13 02:35:06,655 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:35:06,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409539492] [2021-11-13 02:35:06,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409539492] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:35:06,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709145819] [2021-11-13 02:35:06,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:35:06,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:35:06,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:35:06,657 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:35:06,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 02:35:06,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-13 02:35:06,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:35:06,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:35:06,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:07,082 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-13 02:35:07,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:07,350 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-13 02:35:07,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709145819] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:35:07,351 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:35:07,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2021-11-13 02:35:07,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055938754] [2021-11-13 02:35:07,351 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:35:07,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:35:07,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:35:07,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:35:07,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:35:07,353 INFO L87 Difference]: Start difference. First operand 21813 states and 30931 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-13 02:35:08,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:35:08,850 INFO L93 Difference]: Finished difference Result 42137 states and 59153 transitions. [2021-11-13 02:35:08,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:35:08,851 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 146 [2021-11-13 02:35:08,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:35:08,967 INFO L225 Difference]: With dead ends: 42137 [2021-11-13 02:35:08,967 INFO L226 Difference]: Without dead ends: 31925 [2021-11-13 02:35:08,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:35:08,998 INFO L933 BasicCegarLoop]: 3321 mSDtfsCounter, 264 mSDsluCounter, 3491 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 485.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 6568 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.37ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 582.89ms IncrementalHoareTripleChecker+Time [2021-11-13 02:35:08,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 6568 Invalid, 535 Unknown, 0 Unchecked, 14.37ms Time], IncrementalHoareTripleChecker [16 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 582.89ms Time] [2021-11-13 02:35:09,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31925 states. [2021-11-13 02:35:10,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31925 to 25525. [2021-11-13 02:35:10,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25525 states, 22189 states have (on average 1.4771733741944206) internal successors, (32777), 22257 states have internal predecessors, (32777), 2054 states have call successors, (2054), 1281 states have call predecessors, (2054), 1280 states have return successors, (2052), 1987 states have call predecessors, (2052), 2052 states have call successors, (2052) [2021-11-13 02:35:10,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25525 states to 25525 states and 36883 transitions. [2021-11-13 02:35:10,274 INFO L78 Accepts]: Start accepts. Automaton has 25525 states and 36883 transitions. Word has length 146 [2021-11-13 02:35:10,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:35:10,275 INFO L470 AbstractCegarLoop]: Abstraction has 25525 states and 36883 transitions. [2021-11-13 02:35:10,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-13 02:35:10,276 INFO L276 IsEmpty]: Start isEmpty. Operand 25525 states and 36883 transitions. [2021-11-13 02:35:10,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-13 02:35:10,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:35:10,326 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:35:10,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-13 02:35:10,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-13 02:35:10,539 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:35:10,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:35:10,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1253953887, now seen corresponding path program 1 times [2021-11-13 02:35:10,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:35:10,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078132221] [2021-11-13 02:35:10,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:10,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:35:10,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:10,623 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 13 proven. 41 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 02:35:10,624 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:35:10,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078132221] [2021-11-13 02:35:10,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078132221] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:35:10,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426865284] [2021-11-13 02:35:10,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:10,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:35:10,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:35:10,627 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:35:10,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 02:35:10,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:10,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:35:10,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:11,099 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 02:35:11,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:11,472 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-13 02:35:11,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426865284] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:35:11,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:35:11,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 9 [2021-11-13 02:35:11,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753659407] [2021-11-13 02:35:11,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:35:11,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:35:11,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:35:11,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:35:11,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:35:11,475 INFO L87 Difference]: Start difference. First operand 25525 states and 36883 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-13 02:35:13,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:35:13,874 INFO L93 Difference]: Finished difference Result 74111 states and 105015 transitions. [2021-11-13 02:35:13,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:35:13,875 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 147 [2021-11-13 02:35:13,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:35:14,060 INFO L225 Difference]: With dead ends: 74111 [2021-11-13 02:35:14,060 INFO L226 Difference]: Without dead ends: 50233 [2021-11-13 02:35:14,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:35:14,111 INFO L933 BasicCegarLoop]: 3355 mSDtfsCounter, 3445 mSDsluCounter, 3766 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 397.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3445 SdHoareTripleChecker+Valid, 6833 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.99ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 477.22ms IncrementalHoareTripleChecker+Time [2021-11-13 02:35:14,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3445 Valid, 6833 Invalid, 584 Unknown, 0 Unchecked, 20.99ms Time], IncrementalHoareTripleChecker [6 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 477.22ms Time] [2021-11-13 02:35:14,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50233 states. [2021-11-13 02:35:16,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50233 to 49965. [2021-11-13 02:35:16,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49965 states, 43243 states have (on average 1.431329926230835) internal successors, (61895), 43504 states have internal predecessors, (61895), 4035 states have call successors, (4035), 2558 states have call predecessors, (4035), 2685 states have return successors, (4829), 3903 states have call predecessors, (4829), 4033 states have call successors, (4829) [2021-11-13 02:35:16,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49965 states to 49965 states and 70759 transitions. [2021-11-13 02:35:16,401 INFO L78 Accepts]: Start accepts. Automaton has 49965 states and 70759 transitions. Word has length 147 [2021-11-13 02:35:16,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:35:16,401 INFO L470 AbstractCegarLoop]: Abstraction has 49965 states and 70759 transitions. [2021-11-13 02:35:16,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-13 02:35:16,402 INFO L276 IsEmpty]: Start isEmpty. Operand 49965 states and 70759 transitions. [2021-11-13 02:35:16,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-13 02:35:16,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:35:16,512 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:35:16,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-13 02:35:16,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:35:16,739 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:35:16,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:35:16,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1085692194, now seen corresponding path program 2 times [2021-11-13 02:35:16,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:35:16,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184899842] [2021-11-13 02:35:16,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:16,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:35:16,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:16,822 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 02:35:16,822 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:35:16,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184899842] [2021-11-13 02:35:16,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184899842] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:35:16,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791132649] [2021-11-13 02:35:16,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:35:16,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:35:16,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:35:16,840 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:35:16,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-13 02:35:17,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-13 02:35:17,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:35:17,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:35:17,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:17,343 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 02:35:17,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:17,762 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 49 proven. 16 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-13 02:35:17,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791132649] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:35:17,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:35:17,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 4] total 8 [2021-11-13 02:35:17,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047877741] [2021-11-13 02:35:17,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:35:17,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:35:17,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:35:17,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:35:17,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:35:17,765 INFO L87 Difference]: Start difference. First operand 49965 states and 70759 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 02:35:20,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:35:20,809 INFO L93 Difference]: Finished difference Result 98407 states and 141519 transitions. [2021-11-13 02:35:20,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:35:20,810 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 147 [2021-11-13 02:35:20,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:35:21,335 INFO L225 Difference]: With dead ends: 98407 [2021-11-13 02:35:21,335 INFO L226 Difference]: Without dead ends: 72937 [2021-11-13 02:35:21,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:35:21,412 INFO L933 BasicCegarLoop]: 3243 mSDtfsCounter, 3413 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 306.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3413 SdHoareTripleChecker+Valid, 3383 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.10ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 388.16ms IncrementalHoareTripleChecker+Time [2021-11-13 02:35:21,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3413 Valid, 3383 Invalid, 282 Unknown, 0 Unchecked, 8.10ms Time], IncrementalHoareTripleChecker [4 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 388.16ms Time] [2021-11-13 02:35:21,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72937 states. [2021-11-13 02:35:24,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72937 to 72417. [2021-11-13 02:35:24,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72417 states, 62439 states have (on average 1.4227486026361729) internal successors, (88835), 62764 states have internal predecessors, (88835), 6015 states have call successors, (6015), 3834 states have call predecessors, (6015), 3961 states have return successors, (7829), 5819 states have call predecessors, (7829), 6013 states have call successors, (7829) [2021-11-13 02:35:24,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72417 states to 72417 states and 102679 transitions. [2021-11-13 02:35:24,640 INFO L78 Accepts]: Start accepts. Automaton has 72417 states and 102679 transitions. Word has length 147 [2021-11-13 02:35:24,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:35:24,641 INFO L470 AbstractCegarLoop]: Abstraction has 72417 states and 102679 transitions. [2021-11-13 02:35:24,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 02:35:24,641 INFO L276 IsEmpty]: Start isEmpty. Operand 72417 states and 102679 transitions. [2021-11-13 02:35:24,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-13 02:35:24,780 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:35:24,780 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:35:24,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-13 02:35:24,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-13 02:35:24,995 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:35:24,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:35:24,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1575717844, now seen corresponding path program 3 times [2021-11-13 02:35:24,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:35:24,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118677451] [2021-11-13 02:35:24,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:24,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:35:25,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:25,097 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 02:35:25,097 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:35:25,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118677451] [2021-11-13 02:35:25,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118677451] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:35:25,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80555479] [2021-11-13 02:35:25,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 02:35:25,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:35:25,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:35:25,103 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:35:25,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-13 02:35:25,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 02:35:25,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:35:25,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:35:25,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:25,569 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 02:35:25,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:25,916 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-13 02:35:25,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80555479] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:35:25,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:35:25,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 4] total 8 [2021-11-13 02:35:25,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917778292] [2021-11-13 02:35:25,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:35:25,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:35:25,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:35:25,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:35:25,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:35:25,918 INFO L87 Difference]: Start difference. First operand 72417 states and 102679 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 02:35:28,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:35:28,988 INFO L93 Difference]: Finished difference Result 125327 states and 177820 transitions. [2021-11-13 02:35:28,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:35:28,989 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 147 [2021-11-13 02:35:28,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:35:29,289 INFO L225 Difference]: With dead ends: 125327 [2021-11-13 02:35:29,290 INFO L226 Difference]: Without dead ends: 84363 [2021-11-13 02:35:29,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:35:29,378 INFO L933 BasicCegarLoop]: 3232 mSDtfsCounter, 3395 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 218.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3395 SdHoareTripleChecker+Valid, 3278 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.70ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 264.66ms IncrementalHoareTripleChecker+Time [2021-11-13 02:35:29,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3395 Valid, 3278 Invalid, 266 Unknown, 0 Unchecked, 6.70ms Time], IncrementalHoareTripleChecker [4 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 264.66ms Time] [2021-11-13 02:35:29,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84363 states. [2021-11-13 02:35:32,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84363 to 83875. [2021-11-13 02:35:32,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83875 states, 73085 states have (on average 1.382622973250325) internal successors, (101049), 73474 states have internal predecessors, (101049), 6197 states have call successors, (6197), 4400 states have call predecessors, (6197), 4591 states have return successors, (8755), 6001 states have call predecessors, (8755), 6195 states have call successors, (8755) [2021-11-13 02:35:32,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83875 states to 83875 states and 116001 transitions. [2021-11-13 02:35:32,798 INFO L78 Accepts]: Start accepts. Automaton has 83875 states and 116001 transitions. Word has length 147 [2021-11-13 02:35:32,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:35:32,799 INFO L470 AbstractCegarLoop]: Abstraction has 83875 states and 116001 transitions. [2021-11-13 02:35:32,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 02:35:32,799 INFO L276 IsEmpty]: Start isEmpty. Operand 83875 states and 116001 transitions. [2021-11-13 02:35:32,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-13 02:35:32,942 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:35:32,942 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:35:32,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-13 02:35:33,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-13 02:35:33,144 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:35:33,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:35:33,144 INFO L85 PathProgramCache]: Analyzing trace with hash 662828878, now seen corresponding path program 1 times [2021-11-13 02:35:33,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:35:33,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517546008] [2021-11-13 02:35:33,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:33,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:35:33,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:33,206 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-13 02:35:33,207 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:35:33,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517546008] [2021-11-13 02:35:33,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517546008] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:35:33,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848380500] [2021-11-13 02:35:33,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:33,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:35:33,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:35:33,209 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:35:33,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9105030-4056-47bc-b82f-1e37bea5515a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-13 02:35:33,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:33,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:35:33,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:33,646 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-13 02:35:33,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:33,878 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-13 02:35:33,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848380500] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:35:33,878 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:35:33,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2021-11-13 02:35:33,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205733018] [2021-11-13 02:35:33,878 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:35:33,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:35:33,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:35:33,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:35:33,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:35:33,880 INFO L87 Difference]: Start difference. First operand 83875 states and 116001 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-13 02:35:37,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:35:37,453 INFO L93 Difference]: Finished difference Result 150629 states and 210047 transitions. [2021-11-13 02:35:37,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:35:37,453 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 143 [2021-11-13 02:35:37,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:35:37,712 INFO L225 Difference]: With dead ends: 150629 [2021-11-13 02:35:37,713 INFO L226 Difference]: Without dead ends: 94309 [2021-11-13 02:35:37,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:35:37,796 INFO L933 BasicCegarLoop]: 3304 mSDtfsCounter, 191 mSDsluCounter, 3468 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 293.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 6532 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.97ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 360.71ms IncrementalHoareTripleChecker+Time [2021-11-13 02:35:37,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 6532 Invalid, 527 Unknown, 0 Unchecked, 5.97ms Time], IncrementalHoareTripleChecker [16 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 360.71ms Time] [2021-11-13 02:35:37,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94309 states.