./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.10.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.10.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V --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 a7e5f5a1db53b7a411af936e12a734750394ab6a9f7be60b4c793a1fb07a048c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:20:54,553 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:20:54,555 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:20:54,595 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:20:54,596 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:20:54,598 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:20:54,600 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:20:54,603 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:20:54,607 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:20:54,608 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:20:54,610 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:20:54,612 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:20:54,613 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:20:54,615 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:20:54,617 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:20:54,619 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:20:54,629 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:20:54,630 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:20:54,633 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:20:54,637 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:20:54,640 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:20:54,646 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:20:54,653 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:20:54,654 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:20:54,667 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:20:54,668 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:20:54,669 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:20:54,671 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:20:54,672 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:20:54,674 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:20:54,675 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:20:54,677 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:20:54,680 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:20:54,681 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:20:54,683 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:20:54,684 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:20:54,685 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:20:54,685 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:20:54,685 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:20:54,690 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:20:54,691 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:20:54,692 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:20:54,742 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:20:54,743 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:20:54,744 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:20:54,744 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:20:54,752 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:20:54,753 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:20:54,753 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:20:54,753 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:20:54,754 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:20:54,754 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:20:54,755 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:20:54,755 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:20:54,756 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:20:54,756 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:20:54,756 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:20:54,757 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:20:54,757 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:20:54,757 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:20:54,758 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:20:54,758 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:20:54,759 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:20:54,759 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:20:54,759 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:20:54,760 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:20:54,760 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:20:54,760 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:20:54,762 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:20:54,762 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:20:54,763 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:20:54,763 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:20:54,763 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:20:54,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:20:54,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:20:54,764 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:20:54,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:20:54,765 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:20:54,765 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:20:54,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:20:54,766 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:20:54,766 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:20:54,766 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:20:54,766 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_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a7e5f5a1db53b7a411af936e12a734750394ab6a9f7be60b4c793a1fb07a048c [2021-11-23 03:20:55,131 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:20:55,156 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:20:55,159 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:20:55,161 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:20:55,162 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:20:55,164 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.10.cil-2.c [2021-11-23 03:20:55,253 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/data/3fd3a81a5/07340444c4bb41ee95e4e5e4426dcfee/FLAG89f89b62e [2021-11-23 03:20:56,615 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:20:56,616 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/sv-benchmarks/c/combinations/Problem05_label48+token_ring.10.cil-2.c [2021-11-23 03:20:56,715 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/data/3fd3a81a5/07340444c4bb41ee95e4e5e4426dcfee/FLAG89f89b62e [2021-11-23 03:20:57,139 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/data/3fd3a81a5/07340444c4bb41ee95e4e5e4426dcfee [2021-11-23 03:20:57,142 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:20:57,148 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:20:57,152 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:20:57,152 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:20:57,158 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:20:57,159 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:20:57" (1/1) ... [2021-11-23 03:20:57,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@283b992f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:20:57, skipping insertion in model container [2021-11-23 03:20:57,163 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:20:57" (1/1) ... [2021-11-23 03:20:57,174 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:20:57,494 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:21:00,598 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/sv-benchmarks/c/combinations/Problem05_label48+token_ring.10.cil-2.c[375709,375722] [2021-11-23 03:21:00,654 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/sv-benchmarks/c/combinations/Problem05_label48+token_ring.10.cil-2.c[383339,383352] [2021-11-23 03:21:01,164 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:21:01,186 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:21:02,608 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/sv-benchmarks/c/combinations/Problem05_label48+token_ring.10.cil-2.c[375709,375722] [2021-11-23 03:21:02,626 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/sv-benchmarks/c/combinations/Problem05_label48+token_ring.10.cil-2.c[383339,383352] [2021-11-23 03:21:02,688 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:21:02,794 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:21:02,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:02 WrapperNode [2021-11-23 03:21:02,794 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:21:02,795 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:21:02,795 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:21:02,796 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:21:02,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:02" (1/1) ... [2021-11-23 03:21:02,974 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:02" (1/1) ... [2021-11-23 03:21:03,584 INFO L137 Inliner]: procedures = 64, calls = 71, calls flagged for inlining = 42, calls inlined = 42, statements flattened = 13083 [2021-11-23 03:21:03,585 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:21:03,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:21:03,587 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:21:03,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:21:03,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:02" (1/1) ... [2021-11-23 03:21:03,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:02" (1/1) ... [2021-11-23 03:21:03,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:02" (1/1) ... [2021-11-23 03:21:03,682 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:02" (1/1) ... [2021-11-23 03:21:04,098 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:02" (1/1) ... [2021-11-23 03:21:04,204 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:02" (1/1) ... [2021-11-23 03:21:04,241 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:02" (1/1) ... [2021-11-23 03:21:04,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:21:04,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:21:04,361 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:21:04,361 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:21:04,362 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:02" (1/1) ... [2021-11-23 03:21:04,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:21:04,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:21:04,437 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:21:04,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:21:04,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:21:04,500 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-23 03:21:04,500 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-23 03:21:04,500 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-23 03:21:04,500 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-23 03:21:04,501 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-23 03:21:04,501 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-23 03:21:04,501 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-23 03:21:04,501 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-23 03:21:04,501 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-23 03:21:04,502 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-23 03:21:04,502 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-23 03:21:04,502 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-23 03:21:04,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:21:04,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:21:04,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:21:04,842 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:21:04,844 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:21:14,937 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:21:18,636 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:21:18,637 INFO L301 CfgBuilder]: Removed 14 assume(true) statements. [2021-11-23 03:21:18,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:21:18 BoogieIcfgContainer [2021-11-23 03:21:18,643 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:21:18,646 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:21:18,646 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:21:18,651 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:21:18,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:20:57" (1/3) ... [2021-11-23 03:21:18,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@896d44f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:21:18, skipping insertion in model container [2021-11-23 03:21:18,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:02" (2/3) ... [2021-11-23 03:21:18,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@896d44f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:21:18, skipping insertion in model container [2021-11-23 03:21:18,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:21:18" (3/3) ... [2021-11-23 03:21:18,655 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label48+token_ring.10.cil-2.c [2021-11-23 03:21:18,663 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:21:18,663 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 03:21:18,744 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:21:18,753 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 [2021-11-23 03:21:18,753 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 03:21:18,853 INFO L276 IsEmpty]: Start isEmpty. Operand has 1809 states, 1776 states have (on average 1.9600225225225225) internal successors, (3481), 1779 states have internal predecessors, (3481), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-23 03:21:18,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-23 03:21:18,865 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:21:18,866 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:21:18,867 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:21:18,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:21:18,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1349524805, now seen corresponding path program 1 times [2021-11-23 03:21:18,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:21:18,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573122729] [2021-11-23 03:21:18,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:21:18,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:21:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:21:19,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:21:19,520 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:21:19,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573122729] [2021-11-23 03:21:19,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573122729] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:21:19,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:21:19,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:21:19,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001472772] [2021-11-23 03:21:19,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:21:19,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:21:19,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:21:19,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:21:19,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:21:19,580 INFO L87 Difference]: Start difference. First operand has 1809 states, 1776 states have (on average 1.9600225225225225) internal successors, (3481), 1779 states have internal predecessors, (3481), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 03:21:20,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:21:20,960 INFO L93 Difference]: Finished difference Result 3767 states and 7315 transitions. [2021-11-23 03:21:20,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:21:20,964 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2021-11-23 03:21:20,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:21:20,996 INFO L225 Difference]: With dead ends: 3767 [2021-11-23 03:21:20,996 INFO L226 Difference]: Without dead ends: 1957 [2021-11-23 03:21:21,007 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 [2021-11-23 03:21:21,012 INFO L933 BasicCegarLoop]: 3451 mSDtfsCounter, 3713 mSDsluCounter, 3657 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3713 SdHoareTripleChecker+Valid, 6812 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:21:21,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3713 Valid, 6812 Invalid, 708 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 03:21:21,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2021-11-23 03:21:21,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1956. [2021-11-23 03:21:21,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1898 states have (on average 1.9262381454162276) internal successors, (3656), 1901 states have internal predecessors, (3656), 44 states have call successors, (44), 12 states have call predecessors, (44), 12 states have return successors, (44), 43 states have call predecessors, (44), 44 states have call successors, (44) [2021-11-23 03:21:21,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 3744 transitions. [2021-11-23 03:21:21,207 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 3744 transitions. Word has length 61 [2021-11-23 03:21:21,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:21:21,208 INFO L470 AbstractCegarLoop]: Abstraction has 1956 states and 3744 transitions. [2021-11-23 03:21:21,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 03:21:21,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 3744 transitions. [2021-11-23 03:21:21,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-23 03:21:21,221 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:21:21,221 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:21:21,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:21:21,222 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:21:21,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:21:21,224 INFO L85 PathProgramCache]: Analyzing trace with hash -524350286, now seen corresponding path program 1 times [2021-11-23 03:21:21,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:21:21,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870289333] [2021-11-23 03:21:21,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:21:21,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:21:21,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:21:21,456 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 03:21:21,459 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:21:21,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870289333] [2021-11-23 03:21:21,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870289333] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:21:21,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040297580] [2021-11-23 03:21:21,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:21:21,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:21:21,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:21:21,473 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:21:21,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:21:21,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:21:21,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:21:21,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:21:22,228 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 03:21:22,228 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:21:22,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040297580] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:21:22,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:21:22,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-23 03:21:22,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877165150] [2021-11-23 03:21:22,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:21:22,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:21:22,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:21:22,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:21:22,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:21:22,233 INFO L87 Difference]: Start difference. First operand 1956 states and 3744 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 03:21:22,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:21:22,767 INFO L93 Difference]: Finished difference Result 2569 states and 4695 transitions. [2021-11-23 03:21:22,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:21:22,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2021-11-23 03:21:22,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:21:22,786 INFO L225 Difference]: With dead ends: 2569 [2021-11-23 03:21:22,787 INFO L226 Difference]: Without dead ends: 2259 [2021-11-23 03:21:22,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:21:22,791 INFO L933 BasicCegarLoop]: 3309 mSDtfsCounter, 3471 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3471 SdHoareTripleChecker+Valid, 3504 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:21:22,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3471 Valid, 3504 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:21:22,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2021-11-23 03:21:22,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 2255. [2021-11-23 03:21:22,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2255 states, 2147 states have (on average 1.8765719608756404) internal successors, (4029), 2151 states have internal predecessors, (4029), 82 states have call successors, (82), 24 states have call predecessors, (82), 24 states have return successors, (82), 80 states have call predecessors, (82), 82 states have call successors, (82) [2021-11-23 03:21:22,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 4193 transitions. [2021-11-23 03:21:22,883 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 4193 transitions. Word has length 122 [2021-11-23 03:21:22,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:21:22,884 INFO L470 AbstractCegarLoop]: Abstraction has 2255 states and 4193 transitions. [2021-11-23 03:21:22,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 03:21:22,884 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 4193 transitions. [2021-11-23 03:21:22,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-23 03:21:22,888 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:21:22,888 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:21:22,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:21:23,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-23 03:21:23,104 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:21:23,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:21:23,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1739153170, now seen corresponding path program 1 times [2021-11-23 03:21:23,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:21:23,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230262456] [2021-11-23 03:21:23,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:21:23,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:21:23,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:21:23,220 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 03:21:23,221 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:21:23,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230262456] [2021-11-23 03:21:23,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230262456] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:21:23,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338581619] [2021-11-23 03:21:23,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:21:23,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:21:23,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:21:23,224 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:21:23,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:21:23,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:21:23,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:21:23,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:21:23,687 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-23 03:21:23,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:21:23,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338581619] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:21:23,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:21:23,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-23 03:21:23,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580592297] [2021-11-23 03:21:23,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:21:23,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:21:23,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:21:23,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:21:23,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:21:23,691 INFO L87 Difference]: Start difference. First operand 2255 states and 4193 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 03:21:24,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:21:24,276 INFO L93 Difference]: Finished difference Result 3460 states and 6056 transitions. [2021-11-23 03:21:24,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:21:24,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2021-11-23 03:21:24,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:21:24,305 INFO L225 Difference]: With dead ends: 3460 [2021-11-23 03:21:24,305 INFO L226 Difference]: Without dead ends: 2851 [2021-11-23 03:21:24,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:21:24,312 INFO L933 BasicCegarLoop]: 3308 mSDtfsCounter, 3483 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3483 SdHoareTripleChecker+Valid, 3503 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:21:24,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3483 Valid, 3503 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 03:21:24,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-11-23 03:21:24,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2845. [2021-11-23 03:21:24,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2639 states have (on average 1.8048503220917014) internal successors, (4763), 2645 states have internal predecessors, (4763), 156 states have call successors, (156), 48 states have call predecessors, (156), 48 states have return successors, (156), 152 states have call predecessors, (156), 156 states have call successors, (156) [2021-11-23 03:21:24,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 5075 transitions. [2021-11-23 03:21:24,479 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 5075 transitions. Word has length 122 [2021-11-23 03:21:24,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:21:24,480 INFO L470 AbstractCegarLoop]: Abstraction has 2845 states and 5075 transitions. [2021-11-23 03:21:24,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 03:21:24,480 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 5075 transitions. [2021-11-23 03:21:24,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-23 03:21:24,490 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:21:24,490 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:21:24,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:21:24,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:21:24,713 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:21:24,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:21:24,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1221271922, now seen corresponding path program 1 times [2021-11-23 03:21:24,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:21:24,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143731674] [2021-11-23 03:21:24,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:21:24,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:21:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:21:24,878 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 03:21:24,878 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:21:24,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143731674] [2021-11-23 03:21:24,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143731674] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:21:24,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188624891] [2021-11-23 03:21:24,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:21:24,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:21:24,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:21:24,882 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:21:24,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:21:25,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:21:25,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:21:25,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:21:25,404 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 03:21:25,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:21:25,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188624891] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:21:25,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:21:25,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-23 03:21:25,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183489038] [2021-11-23 03:21:25,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:21:25,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:21:25,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:21:25,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:21:25,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:21:25,409 INFO L87 Difference]: Start difference. First operand 2845 states and 5075 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 03:21:26,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:21:26,049 INFO L93 Difference]: Finished difference Result 5218 states and 8728 transitions. [2021-11-23 03:21:26,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:21:26,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2021-11-23 03:21:26,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:21:26,083 INFO L225 Difference]: With dead ends: 5218 [2021-11-23 03:21:26,083 INFO L226 Difference]: Without dead ends: 4019 [2021-11-23 03:21:26,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:21:26,095 INFO L933 BasicCegarLoop]: 3296 mSDtfsCounter, 3489 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3489 SdHoareTripleChecker+Valid, 3491 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:21:26,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3489 Valid, 3491 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 03:21:26,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4019 states. [2021-11-23 03:21:26,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4019 to 4009. [2021-11-23 03:21:26,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4009 states, 3611 states have (on average 1.7189144281362503) internal successors, (6207), 3621 states have internal predecessors, (6207), 300 states have call successors, (300), 96 states have call predecessors, (300), 96 states have return successors, (300), 292 states have call predecessors, (300), 300 states have call successors, (300) [2021-11-23 03:21:26,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4009 states to 4009 states and 6807 transitions. [2021-11-23 03:21:26,376 INFO L78 Accepts]: Start accepts. Automaton has 4009 states and 6807 transitions. Word has length 122 [2021-11-23 03:21:26,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:21:26,376 INFO L470 AbstractCegarLoop]: Abstraction has 4009 states and 6807 transitions. [2021-11-23 03:21:26,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 03:21:26,377 INFO L276 IsEmpty]: Start isEmpty. Operand 4009 states and 6807 transitions. [2021-11-23 03:21:26,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-23 03:21:26,387 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:21:26,387 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:21:26,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:21:26,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:21:26,612 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:21:26,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:21:26,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1550425042, now seen corresponding path program 1 times [2021-11-23 03:21:26,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:21:26,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637505695] [2021-11-23 03:21:26,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:21:26,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:21:26,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:21:26,740 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 03:21:26,740 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:21:26,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637505695] [2021-11-23 03:21:26,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637505695] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:21:26,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684768460] [2021-11-23 03:21:26,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:21:26,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:21:26,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:21:26,742 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:21:26,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:21:26,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:21:26,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:21:27,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:21:27,301 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 03:21:27,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:21:27,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684768460] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:21:27,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:21:27,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-23 03:21:27,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479562762] [2021-11-23 03:21:27,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:21:27,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:21:27,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:21:27,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:21:27,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:21:27,303 INFO L87 Difference]: Start difference. First operand 4009 states and 6807 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 03:21:28,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:21:28,051 INFO L93 Difference]: Finished difference Result 8686 states and 13972 transitions. [2021-11-23 03:21:28,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:21:28,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2021-11-23 03:21:28,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:21:28,115 INFO L225 Difference]: With dead ends: 8686 [2021-11-23 03:21:28,115 INFO L226 Difference]: Without dead ends: 6323 [2021-11-23 03:21:28,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:21:28,136 INFO L933 BasicCegarLoop]: 3306 mSDtfsCounter, 3492 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3492 SdHoareTripleChecker+Valid, 3501 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:21:28,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3492 Valid, 3501 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 03:21:28,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6323 states. [2021-11-23 03:21:28,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6323 to 6305. [2021-11-23 03:21:28,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6305 states, 5531 states have (on average 1.6356897486892064) internal successors, (9047), 5549 states have internal predecessors, (9047), 580 states have call successors, (580), 192 states have call predecessors, (580), 192 states have return successors, (580), 564 states have call predecessors, (580), 580 states have call successors, (580) [2021-11-23 03:21:28,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6305 states to 6305 states and 10207 transitions. [2021-11-23 03:21:28,492 INFO L78 Accepts]: Start accepts. Automaton has 6305 states and 10207 transitions. Word has length 122 [2021-11-23 03:21:28,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:21:28,493 INFO L470 AbstractCegarLoop]: Abstraction has 6305 states and 10207 transitions. [2021-11-23 03:21:28,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 03:21:28,494 INFO L276 IsEmpty]: Start isEmpty. Operand 6305 states and 10207 transitions. [2021-11-23 03:21:28,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-23 03:21:28,510 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:21:28,510 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:21:28,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:21:28,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:21:28,724 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:21:28,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:21:28,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1940686194, now seen corresponding path program 1 times [2021-11-23 03:21:28,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:21:28,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359776879] [2021-11-23 03:21:28,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:21:28,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:21:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:21:28,830 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 03:21:28,830 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:21:28,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359776879] [2021-11-23 03:21:28,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359776879] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:21:28,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898730318] [2021-11-23 03:21:28,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:21:28,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:21:28,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:21:28,833 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:21:28,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:21:29,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:21:29,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 882 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:21:29,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:21:29,446 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 03:21:29,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:21:29,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898730318] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:21:29,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:21:29,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-23 03:21:29,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873839130] [2021-11-23 03:21:29,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:21:29,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:21:29,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:21:29,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:21:29,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:21:29,450 INFO L87 Difference]: Start difference. First operand 6305 states and 10207 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 03:21:30,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:21:30,578 INFO L93 Difference]: Finished difference Result 15526 states and 24260 transitions. [2021-11-23 03:21:30,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:21:30,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2021-11-23 03:21:30,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:21:30,694 INFO L225 Difference]: With dead ends: 15526 [2021-11-23 03:21:30,695 INFO L226 Difference]: Without dead ends: 10867 [2021-11-23 03:21:30,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:21:30,725 INFO L933 BasicCegarLoop]: 3278 mSDtfsCounter, 3477 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3477 SdHoareTripleChecker+Valid, 3473 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:21:30,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3477 Valid, 3473 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 03:21:30,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10867 states. [2021-11-23 03:21:31,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10867 to 10833. [2021-11-23 03:21:31,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10833 states, 9323 states have (on average 1.569344631556366) internal successors, (14631), 9357 states have internal predecessors, (14631), 1124 states have call successors, (1124), 384 states have call predecessors, (1124), 384 states have return successors, (1124), 1092 states have call predecessors, (1124), 1124 states have call successors, (1124) [2021-11-23 03:21:31,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10833 states to 10833 states and 16879 transitions. [2021-11-23 03:21:31,300 INFO L78 Accepts]: Start accepts. Automaton has 10833 states and 16879 transitions. Word has length 122 [2021-11-23 03:21:31,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:21:31,305 INFO L470 AbstractCegarLoop]: Abstraction has 10833 states and 16879 transitions. [2021-11-23 03:21:31,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 03:21:31,305 INFO L276 IsEmpty]: Start isEmpty. Operand 10833 states and 16879 transitions. [2021-11-23 03:21:31,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-23 03:21:31,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:21:31,334 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:21:31,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:21:31,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2120af-e5af-41f4-9be7-9dae2b68cea5/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 03:21:31,548 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:21:31,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:21:31,549 INFO L85 PathProgramCache]: Analyzing trace with hash 946311122, now seen corresponding path program 1 times [2021-11-23 03:21:31,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:21:31,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928290812] [2021-11-23 03:21:31,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:21:31,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:21:31,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:21:31,708 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-23 03:21:31,708 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:21:31,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928290812] [2021-11-23 03:21:31,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928290812] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:21:31,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:21:31,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 03:21:31,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620529418] [2021-11-23 03:21:31,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:21:31,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:21:31,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:21:31,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:21:31,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:21:31,712 INFO L87 Difference]: Start difference. First operand 10833 states and 16879 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-23 03:21:34,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:21:34,070 INFO L93 Difference]: Finished difference Result 26597 states and 40353 transitions. [2021-11-23 03:21:34,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:21:34,071 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 122 [2021-11-23 03:21:34,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:21:34,195 INFO L225 Difference]: With dead ends: 26597 [2021-11-23 03:21:34,195 INFO L226 Difference]: Without dead ends: 17411 [2021-11-23 03:21:34,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:21:34,243 INFO L933 BasicCegarLoop]: 3301 mSDtfsCounter, 4030 mSDsluCounter, 10553 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4036 SdHoareTripleChecker+Valid, 13095 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:21:34,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4036 Valid, 13095 Invalid, 1342 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [130 Valid, 1212 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 03:21:34,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17411 states. [2021-11-23 03:21:35,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17411 to 15297. [2021-11-23 03:21:35,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15297 states, 13051 states have (on average 1.5391157765688452) internal successors, (20087), 13101 states have internal predecessors, (20087), 1668 states have call successors, (1668), 576 states have call predecessors, (1668), 576 states have return successors, (1668), 1620 states have call predecessors, (1668), 1668 states have call successors, (1668) [2021-11-23 03:21:35,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15297 states to 15297 states and 23423 transitions. [2021-11-23 03:21:35,359 INFO L78 Accepts]: Start accepts. Automaton has 15297 states and 23423 transitions. Word has length 122 [2021-11-23 03:21:35,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:21:35,360 INFO L470 AbstractCegarLoop]: Abstraction has 15297 states and 23423 transitions. [2021-11-23 03:21:35,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-23 03:21:35,361 INFO L276 IsEmpty]: Start isEmpty. Operand 15297 states and 23423 transitions. [2021-11-23 03:21:35,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-23 03:21:35,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:21:35,403 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:21:35,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 03:21:35,404 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:21:35,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:21:35,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1797541829, now seen corresponding path program 1 times [2021-11-23 03:21:35,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:21:35,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643408039] [2021-11-23 03:21:35,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:21:35,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:21:35,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:21:35,593 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-23 03:21:35,593 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:21:35,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643408039] [2021-11-23 03:21:35,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643408039] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:21:35,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:21:35,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 03:21:35,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693575041] [2021-11-23 03:21:35,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:21:35,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:21:35,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:21:35,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:21:35,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:21:35,597 INFO L87 Difference]: Start difference. First operand 15297 states and 23423 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-23 03:21:38,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:21:38,204 INFO L93 Difference]: Finished difference Result 36973 states and 55793 transitions. [2021-11-23 03:21:38,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:21:38,205 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 123 [2021-11-23 03:21:38,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:21:38,337 INFO L225 Difference]: With dead ends: 36973 [2021-11-23 03:21:38,337 INFO L226 Difference]: Without dead ends: 23323 [2021-11-23 03:21:38,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:21:38,404 INFO L933 BasicCegarLoop]: 3273 mSDtfsCounter, 3976 mSDsluCounter, 10418 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3982 SdHoareTripleChecker+Valid, 12953 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:21:38,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3982 Valid, 12953 Invalid, 1324 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [142 Valid, 1182 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 03:21:38,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23323 states. [2021-11-23 03:21:39,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23323 to 21929. [2021-11-23 03:21:39,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21929 states, 18587 states have (on average 1.5149835906816593) internal successors, (28159), 18661 states have internal predecessors, (28159), 2476 states have call successors, (2476), 864 states have call predecessors, (2476), 864 states have return successors, (2476), 2404 states have call predecessors, (2476), 2476 states have call successors, (2476) [2021-11-23 03:21:39,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21929 states to 21929 states and 33111 transitions. [2021-11-23 03:21:39,937 INFO L78 Accepts]: Start accepts. Automaton has 21929 states and 33111 transitions. Word has length 123 [2021-11-23 03:21:39,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:21:39,939 INFO L470 AbstractCegarLoop]: Abstraction has 21929 states and 33111 transitions. [2021-11-23 03:21:39,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-23 03:21:39,940 INFO L276 IsEmpty]: Start isEmpty. Operand 21929 states and 33111 transitions. [2021-11-23 03:21:39,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-23 03:21:39,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:21:39,986 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:21:39,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 03:21:39,987 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:21:39,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:21:39,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1844796170, now seen corresponding path program 1 times [2021-11-23 03:21:39,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:21:39,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029489546] [2021-11-23 03:21:39,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:21:39,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:21:40,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:21:40,160 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-23 03:21:40,160 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:21:40,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029489546] [2021-11-23 03:21:40,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029489546] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:21:40,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:21:40,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 03:21:40,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696512866] [2021-11-23 03:21:40,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:21:40,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:21:40,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:21:40,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:21:40,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:21:40,164 INFO L87 Difference]: Start difference. First operand 21929 states and 33111 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-23 03:21:43,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:21:43,470 INFO L93 Difference]: Finished difference Result 72237 states and 107490 transitions. [2021-11-23 03:21:43,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:21:43,471 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 124 [2021-11-23 03:21:43,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:21:43,838 INFO L225 Difference]: With dead ends: 72237 [2021-11-23 03:21:43,839 INFO L226 Difference]: Without dead ends: 51955 [2021-11-23 03:21:43,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:21:43,928 INFO L933 BasicCegarLoop]: 3283 mSDtfsCounter, 4216 mSDsluCounter, 7008 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4235 SdHoareTripleChecker+Valid, 9787 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:21:43,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4235 Valid, 9787 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 03:21:44,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51955 states. [2021-11-23 03:21:47,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51955 to 41345. [2021-11-23 03:21:47,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41345 states, 34811 states have (on average 1.4866277900663583) internal successors, (51751), 34957 states have internal predecessors, (51751), 4804 states have call successors, (4804), 1728 states have call predecessors, (4804), 1728 states have return successors, (4804), 4660 states have call predecessors, (4804), 4804 states have call successors, (4804) [2021-11-23 03:21:47,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41345 states to 41345 states and 61359 transitions. [2021-11-23 03:21:47,756 INFO L78 Accepts]: Start accepts. Automaton has 41345 states and 61359 transitions. Word has length 124 [2021-11-23 03:21:47,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:21:47,756 INFO L470 AbstractCegarLoop]: Abstraction has 41345 states and 61359 transitions. [2021-11-23 03:21:47,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-23 03:21:47,757 INFO L276 IsEmpty]: Start isEmpty. Operand 41345 states and 61359 transitions. [2021-11-23 03:21:47,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-23 03:21:47,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:21:47,838 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:21:47,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 03:21:47,838 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:21:47,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:21:47,839 INFO L85 PathProgramCache]: Analyzing trace with hash -44645213, now seen corresponding path program 1 times [2021-11-23 03:21:47,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:21:47,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132432734] [2021-11-23 03:21:47,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:21:47,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:21:47,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:21:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-23 03:21:47,993 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:21:47,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132432734] [2021-11-23 03:21:47,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132432734] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:21:47,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:21:47,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 03:21:47,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936012512] [2021-11-23 03:21:47,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:21:47,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:21:47,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:21:47,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:21:47,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:21:47,996 INFO L87 Difference]: Start difference. First operand 41345 states and 61359 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-23 03:21:53,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:21:53,403 INFO L93 Difference]: Finished difference Result 108861 states and 161033 transitions. [2021-11-23 03:21:53,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:21:53,404 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 125 [2021-11-23 03:21:53,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:21:53,825 INFO L225 Difference]: With dead ends: 108861 [2021-11-23 03:21:53,826 INFO L226 Difference]: Without dead ends: 69163 [2021-11-23 03:21:53,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:21:53,944 INFO L933 BasicCegarLoop]: 3273 mSDtfsCounter, 4039 mSDsluCounter, 10490 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4045 SdHoareTripleChecker+Valid, 13013 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:21:53,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4045 Valid, 13013 Invalid, 1336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1194 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-23 03:21:54,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69163 states. [2021-11-23 03:21:57,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69163 to 60617. [2021-11-23 03:21:57,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60617 states, 50891 states have (on average 1.4734039417578746) internal successors, (74983), 51109 states have internal predecessors, (74983), 7132 states have call successors, (7132), 2592 states have call predecessors, (7132), 2592 states have return successors, (7132), 6916 states have call predecessors, (7132), 7132 states have call successors, (7132) [2021-11-23 03:21:58,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60617 states to 60617 states and 89247 transitions. [2021-11-23 03:21:58,029 INFO L78 Accepts]: Start accepts. Automaton has 60617 states and 89247 transitions. Word has length 125 [2021-11-23 03:21:58,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:21:58,030 INFO L470 AbstractCegarLoop]: Abstraction has 60617 states and 89247 transitions. [2021-11-23 03:21:58,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-23 03:21:58,030 INFO L276 IsEmpty]: Start isEmpty. Operand 60617 states and 89247 transitions. [2021-11-23 03:21:58,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-23 03:21:58,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:21:58,120 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:21:58,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 03:21:58,121 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:21:58,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:21:58,121 INFO L85 PathProgramCache]: Analyzing trace with hash 728374926, now seen corresponding path program 1 times [2021-11-23 03:21:58,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:21:58,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601820795] [2021-11-23 03:21:58,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:21:58,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:21:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:21:58,649 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-23 03:21:58,650 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:21:58,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601820795] [2021-11-23 03:21:58,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601820795] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:21:58,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:21:58,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 03:21:58,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994396571] [2021-11-23 03:21:58,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:21:58,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:21:58,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:21:58,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:21:58,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:21:58,657 INFO L87 Difference]: Start difference. First operand 60617 states and 89247 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-23 03:22:07,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:22:07,257 INFO L93 Difference]: Finished difference Result 198141 states and 291642 transitions. [2021-11-23 03:22:07,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:22:07,258 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 126 [2021-11-23 03:22:07,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:22:08,057 INFO L225 Difference]: With dead ends: 198141 [2021-11-23 03:22:08,057 INFO L226 Difference]: Without dead ends: 139171 [2021-11-23 03:22:08,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:22:08,365 INFO L933 BasicCegarLoop]: 3265 mSDtfsCounter, 4087 mSDsluCounter, 10368 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4106 SdHoareTripleChecker+Valid, 12898 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:22:08,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4106 Valid, 12898 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 03:22:08,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139171 states. [2021-11-23 03:22:15,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139171 to 116993. [2021-11-23 03:22:15,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116993 states, 97979 states have (on average 1.4575266128456097) internal successors, (142807), 98413 states have internal predecessors, (142807), 13828 states have call successors, (13828), 5184 states have call predecessors, (13828), 5184 states have return successors, (13828), 13396 states have call predecessors, (13828), 13828 states have call successors, (13828) [2021-11-23 03:22:15,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116993 states to 116993 states and 170463 transitions. [2021-11-23 03:22:16,014 INFO L78 Accepts]: Start accepts. Automaton has 116993 states and 170463 transitions. Word has length 126 [2021-11-23 03:22:16,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:22:16,015 INFO L470 AbstractCegarLoop]: Abstraction has 116993 states and 170463 transitions. [2021-11-23 03:22:16,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-23 03:22:16,015 INFO L276 IsEmpty]: Start isEmpty. Operand 116993 states and 170463 transitions. [2021-11-23 03:22:16,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-23 03:22:16,189 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:22:16,189 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:22:16,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 03:22:16,190 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:22:16,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:22:16,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1491396871, now seen corresponding path program 1 times [2021-11-23 03:22:16,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:22:16,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999626671] [2021-11-23 03:22:16,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:22:16,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:22:16,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:22:16,339 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-23 03:22:16,339 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:22:16,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999626671] [2021-11-23 03:22:16,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999626671] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:22:16,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:22:16,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 03:22:16,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564048865] [2021-11-23 03:22:16,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:22:16,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:22:16,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:22:16,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:22:16,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:22:16,343 INFO L87 Difference]: Start difference. First operand 116993 states and 170463 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)