./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.10.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.10.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba --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 906e84f0a25a0f5132fcddd369ea6157dd86409b963593c3fbd2737ae25908f1 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 00:28:09,597 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 00:28:09,600 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 00:28:09,629 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 00:28:09,630 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 00:28:09,631 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 00:28:09,634 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 00:28:09,636 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 00:28:09,639 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 00:28:09,640 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 00:28:09,642 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 00:28:09,644 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 00:28:09,644 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 00:28:09,646 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 00:28:09,648 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 00:28:09,650 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 00:28:09,651 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 00:28:09,653 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 00:28:09,655 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 00:28:09,658 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 00:28:09,660 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 00:28:09,669 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 00:28:09,671 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 00:28:09,672 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 00:28:09,677 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 00:28:09,683 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 00:28:09,683 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 00:28:09,685 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 00:28:09,686 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 00:28:09,688 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 00:28:09,691 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 00:28:09,692 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 00:28:09,694 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 00:28:09,696 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 00:28:09,698 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 00:28:09,699 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 00:28:09,700 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 00:28:09,701 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 00:28:09,701 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 00:28:09,703 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 00:28:09,705 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 00:28:09,706 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 00:28:09,746 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 00:28:09,753 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 00:28:09,754 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 00:28:09,754 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 00:28:09,755 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 00:28:09,755 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 00:28:09,756 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 00:28:09,756 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 00:28:09,756 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 00:28:09,757 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 00:28:09,758 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 00:28:09,758 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 00:28:09,758 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 00:28:09,759 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 00:28:09,759 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 00:28:09,759 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 00:28:09,759 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 00:28:09,760 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 00:28:09,760 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 00:28:09,761 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 00:28:09,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 00:28:09,761 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 00:28:09,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 00:28:09,762 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 00:28:09,762 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 00:28:09,762 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 00:28:09,763 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 00:28:09,763 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 00:28:09,764 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 00:28:09,764 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 00:28:09,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 00:28:09,765 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 00:28:09,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:28:09,766 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 00:28:09,766 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 00:28:09,766 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 00:28:09,767 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 00:28:09,767 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 00:28:09,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 00:28:09,767 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 00:28:09,768 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 00:28:09,769 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 906e84f0a25a0f5132fcddd369ea6157dd86409b963593c3fbd2737ae25908f1 [2022-11-22 00:28:10,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 00:28:10,171 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 00:28:10,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 00:28:10,178 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 00:28:10,179 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 00:28:10,181 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.10.cil-1.c [2022-11-22 00:28:13,677 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 00:28:14,658 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 00:28:14,659 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/sv-benchmarks/c/combinations/Problem05_label46+token_ring.10.cil-1.c [2022-11-22 00:28:14,718 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/data/b91cf626c/feb860b900a44434b77e676761a51730/FLAG47fdd7439 [2022-11-22 00:28:14,742 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/data/b91cf626c/feb860b900a44434b77e676761a51730 [2022-11-22 00:28:14,748 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 00:28:14,752 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 00:28:14,757 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 00:28:14,758 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 00:28:14,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 00:28:14,763 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:28:14" (1/1) ... [2022-11-22 00:28:14,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d3cf916 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:28:14, skipping insertion in model container [2022-11-22 00:28:14,765 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:28:14" (1/1) ... [2022-11-22 00:28:14,774 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 00:28:15,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 00:28:17,822 WARN L237 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_7477a079-9044-496d-8160-f6930cb25e99/sv-benchmarks/c/combinations/Problem05_label46+token_ring.10.cil-1.c[382357,382370] [2022-11-22 00:28:17,849 WARN L237 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_7477a079-9044-496d-8160-f6930cb25e99/sv-benchmarks/c/combinations/Problem05_label46+token_ring.10.cil-1.c[383339,383352] [2022-11-22 00:28:18,170 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:28:18,185 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 00:28:19,633 WARN L237 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_7477a079-9044-496d-8160-f6930cb25e99/sv-benchmarks/c/combinations/Problem05_label46+token_ring.10.cil-1.c[382357,382370] [2022-11-22 00:28:19,715 WARN L237 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_7477a079-9044-496d-8160-f6930cb25e99/sv-benchmarks/c/combinations/Problem05_label46+token_ring.10.cil-1.c[383339,383352] [2022-11-22 00:28:19,776 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:28:19,851 INFO L208 MainTranslator]: Completed translation [2022-11-22 00:28:19,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:28:19 WrapperNode [2022-11-22 00:28:19,852 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 00:28:19,853 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 00:28:19,853 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 00:28:19,854 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 00:28:19,862 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:28:19" (1/1) ... [2022-11-22 00:28:19,976 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:28:19" (1/1) ... [2022-11-22 00:28:20,483 INFO L138 Inliner]: procedures = 64, calls = 72, calls flagged for inlining = 41, calls inlined = 41, statements flattened = 13088 [2022-11-22 00:28:20,483 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 00:28:20,484 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 00:28:20,484 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 00:28:20,484 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 00:28:20,503 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:28:19" (1/1) ... [2022-11-22 00:28:20,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:28:19" (1/1) ... [2022-11-22 00:28:20,568 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:28:19" (1/1) ... [2022-11-22 00:28:20,569 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:28:19" (1/1) ... [2022-11-22 00:28:20,923 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:28:19" (1/1) ... [2022-11-22 00:28:21,003 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:28:19" (1/1) ... [2022-11-22 00:28:21,046 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:28:19" (1/1) ... [2022-11-22 00:28:21,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:28:19" (1/1) ... [2022-11-22 00:28:21,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 00:28:21,304 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 00:28:21,304 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 00:28:21,304 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 00:28:21,305 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:28:19" (1/1) ... [2022-11-22 00:28:21,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:28:21,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:28:21,401 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 00:28:21,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 00:28:21,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 00:28:21,539 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-22 00:28:21,539 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-22 00:28:21,539 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-22 00:28:21,539 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-22 00:28:21,540 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-22 00:28:21,540 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-22 00:28:21,540 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-11-22 00:28:21,540 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-11-22 00:28:21,540 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-22 00:28:21,541 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-22 00:28:21,541 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-22 00:28:21,541 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-22 00:28:21,541 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-22 00:28:21,541 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-22 00:28:21,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 00:28:21,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 00:28:21,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 00:28:21,717 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 00:28:21,720 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 00:28:32,793 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 00:28:36,275 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 00:28:36,275 INFO L300 CfgBuilder]: Removed 14 assume(true) statements. [2022-11-22 00:28:36,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:28:36 BoogieIcfgContainer [2022-11-22 00:28:36,281 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 00:28:36,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 00:28:36,285 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 00:28:36,289 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 00:28:36,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:28:14" (1/3) ... [2022-11-22 00:28:36,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d9f0ac7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:28:36, skipping insertion in model container [2022-11-22 00:28:36,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:28:19" (2/3) ... [2022-11-22 00:28:36,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d9f0ac7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:28:36, skipping insertion in model container [2022-11-22 00:28:36,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:28:36" (3/3) ... [2022-11-22 00:28:36,293 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.10.cil-1.c [2022-11-22 00:28:36,316 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 00:28:36,317 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-22 00:28:36,426 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 00:28:36,434 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@58186def, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 00:28:36,434 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-22 00:28:36,454 INFO L276 IsEmpty]: Start isEmpty. Operand has 1815 states, 1779 states have (on average 1.9600899381675099) internal successors, (3487), 1784 states have internal predecessors, (3487), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-11-22 00:28:36,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-22 00:28:36,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:28:36,469 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:28:36,469 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:28:36,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:28:36,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1514987651, now seen corresponding path program 1 times [2022-11-22 00:28:36,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:28:36,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030225132] [2022-11-22 00:28:36,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:28:36,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:28:36,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:28:37,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:28:37,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:28:37,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030225132] [2022-11-22 00:28:37,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030225132] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:28:37,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:28:37,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:28:37,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867165037] [2022-11-22 00:28:37,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:28:37,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:28:37,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:28:37,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:28:37,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:28:37,320 INFO L87 Difference]: Start difference. First operand has 1815 states, 1779 states have (on average 1.9600899381675099) internal successors, (3487), 1784 states have internal predecessors, (3487), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) 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, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-22 00:28:38,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:28:38,819 INFO L93 Difference]: Finished difference Result 3778 states and 7335 transitions. [2022-11-22 00:28:38,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:28:38,822 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, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 62 [2022-11-22 00:28:38,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:28:38,853 INFO L225 Difference]: With dead ends: 3778 [2022-11-22 00:28:38,853 INFO L226 Difference]: Without dead ends: 1962 [2022-11-22 00:28:38,865 INFO L412 NwaCegarLoop]: 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 [2022-11-22 00:28:38,871 INFO L413 NwaCegarLoop]: 3458 mSDtfsCounter, 3721 mSDsluCounter, 3366 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3721 SdHoareTripleChecker+Valid, 6824 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:28:38,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3721 Valid, 6824 Invalid, 712 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-22 00:28:38,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2022-11-22 00:28:39,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1961. [2022-11-22 00:28:39,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1901 states have (on average 1.9263545502367174) internal successors, (3662), 1905 states have internal predecessors, (3662), 46 states have call successors, (46), 13 states have call predecessors, (46), 12 states have return successors, (44), 43 states have call predecessors, (44), 44 states have call successors, (44) [2022-11-22 00:28:39,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 3752 transitions. [2022-11-22 00:28:39,029 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 3752 transitions. Word has length 62 [2022-11-22 00:28:39,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:28:39,030 INFO L495 AbstractCegarLoop]: Abstraction has 1961 states and 3752 transitions. [2022-11-22 00:28:39,030 INFO L496 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, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-22 00:28:39,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 3752 transitions. [2022-11-22 00:28:39,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-22 00:28:39,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:28:39,039 INFO L195 NwaCegarLoop]: 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] [2022-11-22 00:28:39,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 00:28:39,039 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:28:39,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:28:39,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1825992029, now seen corresponding path program 1 times [2022-11-22 00:28:39,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:28:39,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509146771] [2022-11-22 00:28:39,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:28:39,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:28:39,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:28:39,444 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 00:28:39,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:28:39,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509146771] [2022-11-22 00:28:39,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509146771] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:28:39,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820704507] [2022-11-22 00:28:39,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:28:39,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:28:39,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:28:39,455 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:28:39,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 00:28:39,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:28:39,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 00:28:39,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:28:39,963 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 00:28:39,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:28:39,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820704507] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:28:39,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:28:39,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 00:28:39,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235208340] [2022-11-22 00:28:39,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:28:39,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:28:39,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:28:39,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:28:39,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:28:39,977 INFO L87 Difference]: Start difference. First operand 1961 states and 3752 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 00:28:40,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:28:40,675 INFO L93 Difference]: Finished difference Result 2584 states and 4719 transitions. [2022-11-22 00:28:40,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:28:40,676 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2022-11-22 00:28:40,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:28:40,690 INFO L225 Difference]: With dead ends: 2584 [2022-11-22 00:28:40,691 INFO L226 Difference]: Without dead ends: 2269 [2022-11-22 00:28:40,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:28:40,694 INFO L413 NwaCegarLoop]: 3323 mSDtfsCounter, 3479 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3479 SdHoareTripleChecker+Valid, 3525 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 00:28:40,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3479 Valid, 3525 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 00:28:40,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2022-11-22 00:28:40,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 2263. [2022-11-22 00:28:40,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2153 states have (on average 1.8769159312587087) internal successors, (4041), 2158 states have internal predecessors, (4041), 84 states have call successors, (84), 25 states have call predecessors, (84), 24 states have return successors, (82), 80 states have call predecessors, (82), 82 states have call successors, (82) [2022-11-22 00:28:40,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 4207 transitions. [2022-11-22 00:28:40,782 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 4207 transitions. Word has length 123 [2022-11-22 00:28:40,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:28:40,783 INFO L495 AbstractCegarLoop]: Abstraction has 2263 states and 4207 transitions. [2022-11-22 00:28:40,783 INFO L496 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 00:28:40,880 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 4207 transitions. [2022-11-22 00:28:40,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-22 00:28:40,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:28:40,886 INFO L195 NwaCegarLoop]: 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] [2022-11-22 00:28:40,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 00:28:41,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:28:41,087 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:28:41,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:28:41,089 INFO L85 PathProgramCache]: Analyzing trace with hash -376861629, now seen corresponding path program 1 times [2022-11-22 00:28:41,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:28:41,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136454300] [2022-11-22 00:28:41,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:28:41,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:28:41,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:28:41,317 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 00:28:41,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:28:41,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136454300] [2022-11-22 00:28:41,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136454300] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:28:41,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952505219] [2022-11-22 00:28:41,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:28:41,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:28:41,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:28:41,326 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:28:41,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 00:28:41,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:28:41,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 00:28:41,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:28:41,683 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-22 00:28:41,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:28:41,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952505219] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:28:41,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:28:41,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 00:28:41,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587660887] [2022-11-22 00:28:41,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:28:41,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:28:41,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:28:41,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:28:41,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:28:41,687 INFO L87 Difference]: Start difference. First operand 2263 states and 4207 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 00:28:42,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:28:42,432 INFO L93 Difference]: Finished difference Result 3484 states and 6098 transitions. [2022-11-22 00:28:42,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:28:42,433 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2022-11-22 00:28:42,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:28:42,457 INFO L225 Difference]: With dead ends: 3484 [2022-11-22 00:28:42,457 INFO L226 Difference]: Without dead ends: 2867 [2022-11-22 00:28:42,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:28:42,469 INFO L413 NwaCegarLoop]: 3322 mSDtfsCounter, 3497 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3497 SdHoareTripleChecker+Valid, 3524 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 00:28:42,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3497 Valid, 3524 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 00:28:42,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2867 states. [2022-11-22 00:28:42,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2867 to 2859. [2022-11-22 00:28:42,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2859 states, 2651 states have (on average 1.8057336854017352) internal successors, (4787), 2658 states have internal predecessors, (4787), 158 states have call successors, (158), 49 states have call predecessors, (158), 48 states have return successors, (156), 152 states have call predecessors, (156), 156 states have call successors, (156) [2022-11-22 00:28:42,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2859 states to 2859 states and 5101 transitions. [2022-11-22 00:28:42,612 INFO L78 Accepts]: Start accepts. Automaton has 2859 states and 5101 transitions. Word has length 123 [2022-11-22 00:28:42,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:28:42,613 INFO L495 AbstractCegarLoop]: Abstraction has 2859 states and 5101 transitions. [2022-11-22 00:28:42,613 INFO L496 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 00:28:42,613 INFO L276 IsEmpty]: Start isEmpty. Operand 2859 states and 5101 transitions. [2022-11-22 00:28:42,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-22 00:28:42,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:28:42,619 INFO L195 NwaCegarLoop]: 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] [2022-11-22 00:28:42,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 00:28:42,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:28:42,828 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:28:42,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:28:42,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1236950499, now seen corresponding path program 1 times [2022-11-22 00:28:42,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:28:42,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072334567] [2022-11-22 00:28:42,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:28:42,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:28:42,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:28:43,036 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 00:28:43,036 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:28:43,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072334567] [2022-11-22 00:28:43,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072334567] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:28:43,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167944520] [2022-11-22 00:28:43,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:28:43,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:28:43,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:28:43,039 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:28:43,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 00:28:43,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:28:43,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 00:28:43,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:28:43,421 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-22 00:28:43,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:28:43,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167944520] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:28:43,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:28:43,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 00:28:43,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308474557] [2022-11-22 00:28:43,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:28:43,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:28:43,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:28:43,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:28:43,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:28:43,432 INFO L87 Difference]: Start difference. First operand 2859 states and 5101 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 00:28:44,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:28:44,146 INFO L93 Difference]: Finished difference Result 5260 states and 8806 transitions. [2022-11-22 00:28:44,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:28:44,147 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2022-11-22 00:28:44,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:28:44,171 INFO L225 Difference]: With dead ends: 5260 [2022-11-22 00:28:44,171 INFO L226 Difference]: Without dead ends: 4047 [2022-11-22 00:28:44,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:28:44,180 INFO L413 NwaCegarLoop]: 3285 mSDtfsCounter, 3491 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3491 SdHoareTripleChecker+Valid, 3487 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 00:28:44,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3491 Valid, 3487 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 00:28:44,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4047 states. [2022-11-22 00:28:44,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4047 to 4035. [2022-11-22 00:28:44,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4035 states, 3635 states have (on average 1.7207702888583218) internal successors, (6255), 3646 states have internal predecessors, (6255), 302 states have call successors, (302), 97 states have call predecessors, (302), 96 states have return successors, (300), 292 states have call predecessors, (300), 300 states have call successors, (300) [2022-11-22 00:28:44,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4035 states to 4035 states and 6857 transitions. [2022-11-22 00:28:44,391 INFO L78 Accepts]: Start accepts. Automaton has 4035 states and 6857 transitions. Word has length 123 [2022-11-22 00:28:44,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:28:44,392 INFO L495 AbstractCegarLoop]: Abstraction has 4035 states and 6857 transitions. [2022-11-22 00:28:44,392 INFO L496 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 00:28:44,392 INFO L276 IsEmpty]: Start isEmpty. Operand 4035 states and 6857 transitions. [2022-11-22 00:28:44,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-22 00:28:44,399 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:28:44,399 INFO L195 NwaCegarLoop]: 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] [2022-11-22 00:28:44,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-22 00:28:44,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:28:44,608 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:28:44,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:28:44,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1932466301, now seen corresponding path program 1 times [2022-11-22 00:28:44,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:28:44,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318406208] [2022-11-22 00:28:44,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:28:44,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:28:44,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:28:44,795 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 00:28:44,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:28:44,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318406208] [2022-11-22 00:28:44,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318406208] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:28:44,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938780717] [2022-11-22 00:28:44,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:28:44,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:28:44,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:28:44,798 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:28:44,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 00:28:45,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:28:45,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 00:28:45,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:28:45,168 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 00:28:45,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:28:45,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938780717] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:28:45,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:28:45,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 00:28:45,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570063372] [2022-11-22 00:28:45,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:28:45,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:28:45,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:28:45,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:28:45,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:28:45,172 INFO L87 Difference]: Start difference. First operand 4035 states and 6857 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 00:28:46,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:28:46,283 INFO L93 Difference]: Finished difference Result 8764 states and 14122 transitions. [2022-11-22 00:28:46,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:28:46,284 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2022-11-22 00:28:46,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:28:46,323 INFO L225 Difference]: With dead ends: 8764 [2022-11-22 00:28:46,324 INFO L226 Difference]: Without dead ends: 6375 [2022-11-22 00:28:46,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:28:46,339 INFO L413 NwaCegarLoop]: 3285 mSDtfsCounter, 3500 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3500 SdHoareTripleChecker+Valid, 3487 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 00:28:46,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3500 Valid, 3487 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 00:28:46,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6375 states. [2022-11-22 00:28:46,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6375 to 6355. [2022-11-22 00:28:46,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6355 states, 5579 states have (on average 1.6388241620362072) internal successors, (9143), 5598 states have internal predecessors, (9143), 582 states have call successors, (582), 193 states have call predecessors, (582), 192 states have return successors, (580), 564 states have call predecessors, (580), 580 states have call successors, (580) [2022-11-22 00:28:46,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6355 states to 6355 states and 10305 transitions. [2022-11-22 00:28:46,781 INFO L78 Accepts]: Start accepts. Automaton has 6355 states and 10305 transitions. Word has length 123 [2022-11-22 00:28:46,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:28:46,782 INFO L495 AbstractCegarLoop]: Abstraction has 6355 states and 10305 transitions. [2022-11-22 00:28:46,782 INFO L496 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 00:28:46,782 INFO L276 IsEmpty]: Start isEmpty. Operand 6355 states and 10305 transitions. [2022-11-22 00:28:46,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-22 00:28:46,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:28:46,797 INFO L195 NwaCegarLoop]: 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] [2022-11-22 00:28:46,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 00:28:47,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:28:47,005 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:28:47,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:28:47,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1575694819, now seen corresponding path program 1 times [2022-11-22 00:28:47,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:28:47,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787071433] [2022-11-22 00:28:47,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:28:47,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:28:47,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:28:47,237 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 00:28:47,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:28:47,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787071433] [2022-11-22 00:28:47,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787071433] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:28:47,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686074322] [2022-11-22 00:28:47,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:28:47,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:28:47,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:28:47,241 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:28:47,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 00:28:47,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:28:47,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 00:28:47,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:28:47,611 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-22 00:28:47,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:28:47,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686074322] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:28:47,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:28:47,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 00:28:47,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111078662] [2022-11-22 00:28:47,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:28:47,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:28:47,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:28:47,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:28:47,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:28:47,615 INFO L87 Difference]: Start difference. First operand 6355 states and 10305 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 00:28:48,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:28:48,782 INFO L93 Difference]: Finished difference Result 15676 states and 24554 transitions. [2022-11-22 00:28:48,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:28:48,783 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2022-11-22 00:28:48,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:28:48,861 INFO L225 Difference]: With dead ends: 15676 [2022-11-22 00:28:48,862 INFO L226 Difference]: Without dead ends: 10967 [2022-11-22 00:28:48,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:28:48,889 INFO L413 NwaCegarLoop]: 3285 mSDtfsCounter, 3485 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3485 SdHoareTripleChecker+Valid, 3487 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 00:28:48,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3485 Valid, 3487 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 00:28:48,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10967 states. [2022-11-22 00:28:49,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10967 to 10931. [2022-11-22 00:28:49,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10931 states, 9419 states have (on average 1.5737339420320628) internal successors, (14823), 9454 states have internal predecessors, (14823), 1126 states have call successors, (1126), 385 states have call predecessors, (1126), 384 states have return successors, (1124), 1092 states have call predecessors, (1124), 1124 states have call successors, (1124) [2022-11-22 00:28:49,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10931 states to 10931 states and 17073 transitions. [2022-11-22 00:28:49,686 INFO L78 Accepts]: Start accepts. Automaton has 10931 states and 17073 transitions. Word has length 123 [2022-11-22 00:28:49,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:28:49,689 INFO L495 AbstractCegarLoop]: Abstraction has 10931 states and 17073 transitions. [2022-11-22 00:28:49,690 INFO L496 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 00:28:49,690 INFO L276 IsEmpty]: Start isEmpty. Operand 10931 states and 17073 transitions. [2022-11-22 00:28:49,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-22 00:28:49,714 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:28:49,714 INFO L195 NwaCegarLoop]: 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] [2022-11-22 00:28:49,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 00:28:49,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7477a079-9044-496d-8160-f6930cb25e99/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:28:49,923 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:28:49,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:28:49,924 INFO L85 PathProgramCache]: Analyzing trace with hash 814838659, now seen corresponding path program 1 times [2022-11-22 00:28:49,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:28:49,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684529726] [2022-11-22 00:28:49,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:28:49,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:28:49,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:28:50,607 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-22 00:28:50,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:28:50,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684529726] [2022-11-22 00:28:50,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684529726] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:28:50,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:28:50,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 00:28:50,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455896846] [2022-11-22 00:28:50,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:28:50,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:28:50,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:28:50,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:28:50,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:28:50,611 INFO L87 Difference]: Start difference. First operand 10931 states and 17073 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 00:28:52,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:28:52,912 INFO L93 Difference]: Finished difference Result 25179 states and 38535 transitions. [2022-11-22 00:28:52,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 00:28:52,913 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 123 [2022-11-22 00:28:52,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:28:53,027 INFO L225 Difference]: With dead ends: 25179 [2022-11-22 00:28:53,027 INFO L226 Difference]: Without dead ends: 15895 [2022-11-22 00:28:53,066 INFO L412 NwaCegarLoop]: 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 [2022-11-22 00:28:53,067 INFO L413 NwaCegarLoop]: 3289 mSDtfsCounter, 3962 mSDsluCounter, 9674 mSDsCounter, 0 mSdLazyCounter, 1201 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3968 SdHoareTripleChecker+Valid, 12963 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-22 00:28:53,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3968 Valid, 12963 Invalid, 1336 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [135 Valid, 1201 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-22 00:28:53,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15895 states. [2022-11-22 00:28:54,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15895 to 15443. [2022-11-22 00:28:54,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15443 states, 13195 states have (on average 1.544145509662751) internal successors, (20375), 13246 states have internal predecessors, (20375), 1670 states have call successors, (1670), 577 states have call predecessors, (1670), 576 states have return successors, (1668), 1620 states have call predecessors, (1668), 1668 states have call successors, (1668) [2022-11-22 00:28:54,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15443 states to 15443 states and 23713 transitions. [2022-11-22 00:28:54,176 INFO L78 Accepts]: Start accepts. Automaton has 15443 states and 23713 transitions. Word has length 123 [2022-11-22 00:28:54,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:28:54,178 INFO L495 AbstractCegarLoop]: Abstraction has 15443 states and 23713 transitions. [2022-11-22 00:28:54,179 INFO L496 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 00:28:54,179 INFO L276 IsEmpty]: Start isEmpty. Operand 15443 states and 23713 transitions. [2022-11-22 00:28:54,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-22 00:28:54,209 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:28:54,209 INFO L195 NwaCegarLoop]: 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] [2022-11-22 00:28:54,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 00:28:54,210 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:28:54,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:28:54,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1604270250, now seen corresponding path program 1 times [2022-11-22 00:28:54,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:28:54,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133244859] [2022-11-22 00:28:54,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:28:54,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:28:54,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:28:54,991 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-22 00:28:54,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:28:54,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133244859] [2022-11-22 00:28:54,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133244859] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:28:54,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:28:54,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 00:28:54,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558322138] [2022-11-22 00:28:54,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:28:54,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:28:54,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:28:54,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:28:55,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:28:55,000 INFO L87 Difference]: Start difference. First operand 15443 states and 23713 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 00:28:59,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:28:59,087 INFO L93 Difference]: Finished difference Result 49499 states and 74312 transitions. [2022-11-22 00:28:59,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 00:28:59,088 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 124 [2022-11-22 00:28:59,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:28:59,280 INFO L225 Difference]: With dead ends: 49499 [2022-11-22 00:28:59,281 INFO L226 Difference]: Without dead ends: 35703 [2022-11-22 00:28:59,336 INFO L412 NwaCegarLoop]: 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 [2022-11-22 00:28:59,338 INFO L413 NwaCegarLoop]: 3294 mSDtfsCounter, 4182 mSDsluCounter, 9696 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4201 SdHoareTripleChecker+Valid, 12990 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-22 00:28:59,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4201 Valid, 12990 Invalid, 1341 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [133 Valid, 1208 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-22 00:28:59,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35703 states. [2022-11-22 00:29:01,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35703 to 28659. [2022-11-22 00:29:01,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28659 states, 24267 states have (on average 1.5088391642971937) internal successors, (36615), 24366 states have internal predecessors, (36615), 3238 states have call successors, (3238), 1153 states have call predecessors, (3238), 1152 states have return successors, (3236), 3140 states have call predecessors, (3236), 3236 states have call successors, (3236) [2022-11-22 00:29:01,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28659 states to 28659 states and 43089 transitions. [2022-11-22 00:29:01,600 INFO L78 Accepts]: Start accepts. Automaton has 28659 states and 43089 transitions. Word has length 124 [2022-11-22 00:29:01,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:29:01,602 INFO L495 AbstractCegarLoop]: Abstraction has 28659 states and 43089 transitions. [2022-11-22 00:29:01,602 INFO L496 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 00:29:01,602 INFO L276 IsEmpty]: Start isEmpty. Operand 28659 states and 43089 transitions. [2022-11-22 00:29:01,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-22 00:29:01,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:29:01,651 INFO L195 NwaCegarLoop]: 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] [2022-11-22 00:29:01,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 00:29:01,652 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:29:01,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:29:01,652 INFO L85 PathProgramCache]: Analyzing trace with hash 994727523, now seen corresponding path program 1 times [2022-11-22 00:29:01,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:29:01,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884017675] [2022-11-22 00:29:01,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:29:01,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:29:01,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:29:02,560 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-22 00:29:02,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:29:02,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884017675] [2022-11-22 00:29:02,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884017675] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:29:02,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:29:02,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 00:29:02,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256779763] [2022-11-22 00:29:02,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:29:02,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:29:02,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:29:02,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:29:02,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:29:02,564 INFO L87 Difference]: Start difference. First operand 28659 states and 43089 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 00:29:06,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:29:06,583 INFO L93 Difference]: Finished difference Result 74491 states and 111191 transitions. [2022-11-22 00:29:06,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 00:29:06,583 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 125 [2022-11-22 00:29:06,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:29:06,793 INFO L225 Difference]: With dead ends: 74491 [2022-11-22 00:29:06,793 INFO L226 Difference]: Without dead ends: 47479 [2022-11-22 00:29:06,856 INFO L412 NwaCegarLoop]: 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 [2022-11-22 00:29:06,857 INFO L413 NwaCegarLoop]: 3278 mSDtfsCounter, 4065 mSDsluCounter, 9754 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4071 SdHoareTripleChecker+Valid, 13032 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:29:06,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4071 Valid, 13032 Invalid, 1351 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [147 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-22 00:29:06,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47479 states. [2022-11-22 00:29:09,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47479 to 41779. [2022-11-22 00:29:09,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41779 states, 35243 states have (on average 1.492920579973328) internal successors, (52615), 35390 states have internal predecessors, (52615), 4806 states have call successors, (4806), 1729 states have call predecessors, (4806), 1728 states have return successors, (4804), 4660 states have call predecessors, (4804), 4804 states have call successors, (4804) [2022-11-22 00:29:09,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41779 states to 41779 states and 62225 transitions. [2022-11-22 00:29:09,711 INFO L78 Accepts]: Start accepts. Automaton has 41779 states and 62225 transitions. Word has length 125 [2022-11-22 00:29:09,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:29:09,711 INFO L495 AbstractCegarLoop]: Abstraction has 41779 states and 62225 transitions. [2022-11-22 00:29:09,712 INFO L496 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 00:29:09,712 INFO L276 IsEmpty]: Start isEmpty. Operand 41779 states and 62225 transitions. [2022-11-22 00:29:09,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-22 00:29:09,779 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:29:09,779 INFO L195 NwaCegarLoop]: 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] [2022-11-22 00:29:09,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 00:29:09,780 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:29:09,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:29:09,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1437184074, now seen corresponding path program 1 times [2022-11-22 00:29:09,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:29:09,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318134922] [2022-11-22 00:29:09,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:29:09,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:29:09,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:29:10,569 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-22 00:29:10,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:29:10,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318134922] [2022-11-22 00:29:10,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318134922] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:29:10,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:29:10,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 00:29:10,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725558450] [2022-11-22 00:29:10,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:29:10,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:29:10,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:29:10,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:29:10,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:29:10,573 INFO L87 Difference]: Start difference. First operand 41779 states and 62225 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 00:29:17,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:29:17,349 INFO L93 Difference]: Finished difference Result 135099 states and 200472 transitions. [2022-11-22 00:29:17,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 00:29:17,350 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 126 [2022-11-22 00:29:17,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:29:17,888 INFO L225 Difference]: With dead ends: 135099 [2022-11-22 00:29:17,888 INFO L226 Difference]: Without dead ends: 94967 [2022-11-22 00:29:17,996 INFO L412 NwaCegarLoop]: 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 [2022-11-22 00:29:17,997 INFO L413 NwaCegarLoop]: 3270 mSDtfsCounter, 4151 mSDsluCounter, 6487 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4170 SdHoareTripleChecker+Valid, 9757 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 00:29:17,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4170 Valid, 9757 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 00:29:18,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94967 states.