./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh --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 5ee0afe9c2a2e5e350a29156a4a7c18a224cec42ab7ff37fc9f10d35d9e173ae --- 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-2329fc7 [2022-12-14 07:11:17,577 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:11:17,579 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:11:17,593 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:11:17,593 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:11:17,594 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:11:17,594 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:11:17,595 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:11:17,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:11:17,597 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:11:17,598 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:11:17,598 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:11:17,598 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:11:17,599 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:11:17,600 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:11:17,601 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:11:17,601 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:11:17,602 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:11:17,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:11:17,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:11:17,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:11:17,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:11:17,606 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:11:17,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:11:17,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:11:17,609 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:11:17,610 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:11:17,610 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:11:17,610 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:11:17,611 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:11:17,611 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:11:17,612 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:11:17,612 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:11:17,613 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:11:17,613 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:11:17,613 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:11:17,614 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:11:17,614 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:11:17,614 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:11:17,615 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:11:17,615 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:11:17,616 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 07:11:17,630 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:11:17,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:11:17,630 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:11:17,630 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:11:17,631 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:11:17,631 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:11:17,631 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:11:17,631 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:11:17,631 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:11:17,637 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:11:17,638 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:11:17,638 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:11:17,638 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:11:17,638 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:11:17,638 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:11:17,638 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:11:17,639 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:11:17,639 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:11:17,639 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:11:17,640 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:11:17,640 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:11:17,640 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:11:17,640 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:11:17,640 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 07:11:17,641 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:11:17,641 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 07:11:17,641 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:11:17,641 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 07:11:17,641 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:11:17,641 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 07:11:17,642 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:11:17,642 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:11:17,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:11:17,642 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:11:17,643 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:11:17,643 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:11:17,643 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 07:11:17,643 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:11:17,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:11:17,644 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 07:11:17,644 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:11:17,644 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_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ee0afe9c2a2e5e350a29156a4a7c18a224cec42ab7ff37fc9f10d35d9e173ae [2022-12-14 07:11:17,810 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:11:17,828 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:11:17,830 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:11:17,831 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:11:17,831 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:11:17,832 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-1.c [2022-12-14 07:11:20,372 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:11:20,757 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:11:20,758 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-1.c [2022-12-14 07:11:20,789 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh/data/d14e4ba46/6c429086cc4f46ac8876a6a870890774/FLAG24a859d1b [2022-12-14 07:11:20,926 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh/data/d14e4ba46/6c429086cc4f46ac8876a6a870890774 [2022-12-14 07:11:20,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:11:20,929 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:11:20,930 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:11:20,930 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:11:20,933 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:11:20,933 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:11:20" (1/1) ... [2022-12-14 07:11:20,934 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30510b7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:11:20, skipping insertion in model container [2022-12-14 07:11:20,934 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:11:20" (1/1) ... [2022-12-14 07:11:20,939 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:11:21,114 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:11:22,396 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_73afac0a-4bf0-4e83-9142-4667fa0fca55/sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-1.c[382357,382370] [2022-12-14 07:11:22,415 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_73afac0a-4bf0-4e83-9142-4667fa0fca55/sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-1.c[383339,383352] [2022-12-14 07:11:22,578 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:11:22,586 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:11:23,347 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_73afac0a-4bf0-4e83-9142-4667fa0fca55/sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-1.c[382357,382370] [2022-12-14 07:11:23,349 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_73afac0a-4bf0-4e83-9142-4667fa0fca55/sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-1.c[383339,383352] [2022-12-14 07:11:23,357 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:11:23,392 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:11:23,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:11:23 WrapperNode [2022-12-14 07:11:23,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:11:23,393 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:11:23,393 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:11:23,393 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:11:23,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:11:23" (1/1) ... [2022-12-14 07:11:23,452 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:11:23" (1/1) ... [2022-12-14 07:11:23,683 INFO L138 Inliner]: procedures = 54, calls = 56, calls flagged for inlining = 32, calls inlined = 32, statements flattened = 12793 [2022-12-14 07:11:23,683 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:11:23,684 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:11:23,684 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:11:23,684 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:11:23,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:11:23" (1/1) ... [2022-12-14 07:11:23,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:11:23" (1/1) ... [2022-12-14 07:11:23,722 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:11:23" (1/1) ... [2022-12-14 07:11:23,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:11:23" (1/1) ... [2022-12-14 07:11:23,875 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:11:23" (1/1) ... [2022-12-14 07:11:23,921 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:11:23" (1/1) ... [2022-12-14 07:11:23,956 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:11:23" (1/1) ... [2022-12-14 07:11:23,969 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:11:23" (1/1) ... [2022-12-14 07:11:24,021 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:11:24,022 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:11:24,022 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:11:24,022 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:11:24,023 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:11:23" (1/1) ... [2022-12-14 07:11:24,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:11:24,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:11:24,045 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:11:24,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:11:24,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:11:24,113 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 07:11:24,113 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 07:11:24,113 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 07:11:24,113 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 07:11:24,113 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 07:11:24,113 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 07:11:24,113 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 07:11:24,113 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 07:11:24,113 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 07:11:24,113 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 07:11:24,113 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 07:11:24,113 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 07:11:24,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 07:11:24,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:11:24,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:11:24,204 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:11:24,205 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:11:29,460 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:11:30,601 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:11:30,602 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-12-14 07:11:30,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:11:30 BoogieIcfgContainer [2022-12-14 07:11:30,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:11:30,607 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:11:30,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:11:30,609 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:11:30,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:11:20" (1/3) ... [2022-12-14 07:11:30,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c128757 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:11:30, skipping insertion in model container [2022-12-14 07:11:30,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:11:23" (2/3) ... [2022-12-14 07:11:30,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c128757 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:11:30, skipping insertion in model container [2022-12-14 07:11:30,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:11:30" (3/3) ... [2022-12-14 07:11:30,611 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.05.cil-1.c [2022-12-14 07:11:30,626 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:11:30,626 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 07:11:30,685 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:11:30,689 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;@33fdfe3e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:11:30,689 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 07:11:30,698 INFO L276 IsEmpty]: Start isEmpty. Operand has 1754 states, 1726 states have (on average 1.97045191193511) internal successors, (3401), 1729 states have internal predecessors, (3401), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-12-14 07:11:30,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 07:11:30,708 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:11:30,709 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] [2022-12-14 07:11:30,709 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:11:30,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:11:30,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1226517415, now seen corresponding path program 1 times [2022-12-14 07:11:30,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:11:30,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471901128] [2022-12-14 07:11:30,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:11:30,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:11:30,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:11:30,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:11:30,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:11:30,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471901128] [2022-12-14 07:11:30,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471901128] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:11:30,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:11:30,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:11:30,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763177231] [2022-12-14 07:11:30,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:11:30,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:11:30,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:11:30,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:11:30,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:11:31,025 INFO L87 Difference]: Start difference. First operand has 1754 states, 1726 states have (on average 1.97045191193511) internal successors, (3401), 1729 states have internal predecessors, (3401), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 07:11:31,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:11:31,693 INFO L93 Difference]: Finished difference Result 3602 states and 7035 transitions. [2022-12-14 07:11:31,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:11:31,695 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2022-12-14 07:11:31,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:11:31,712 INFO L225 Difference]: With dead ends: 3602 [2022-12-14 07:11:31,712 INFO L226 Difference]: Without dead ends: 1847 [2022-12-14 07:11:31,719 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 [2022-12-14 07:11:31,721 INFO L413 NwaCegarLoop]: 3301 mSDtfsCounter, 3548 mSDsluCounter, 3231 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3548 SdHoareTripleChecker+Valid, 6532 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:11:31,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3548 Valid, 6532 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 07:11:31,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2022-12-14 07:11:31,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1846. [2022-12-14 07:11:31,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1846 states, 1798 states have (on average 1.9443826473859844) internal successors, (3496), 1801 states have internal predecessors, (3496), 34 states have call successors, (34), 12 states have call predecessors, (34), 12 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-12-14 07:11:31,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 3564 transitions. [2022-12-14 07:11:31,822 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 3564 transitions. Word has length 46 [2022-12-14 07:11:31,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:11:31,823 INFO L495 AbstractCegarLoop]: Abstraction has 1846 states and 3564 transitions. [2022-12-14 07:11:31,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 07:11:31,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 3564 transitions. [2022-12-14 07:11:31,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 07:11:31,826 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:11:31,827 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:11:31,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 07:11:31,827 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:11:31,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:11:31,828 INFO L85 PathProgramCache]: Analyzing trace with hash -60582672, now seen corresponding path program 1 times [2022-12-14 07:11:31,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:11:31,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221594515] [2022-12-14 07:11:31,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:11:31,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:11:31,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:11:31,967 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 07:11:31,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:11:31,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221594515] [2022-12-14 07:11:31,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221594515] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:11:31,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283093788] [2022-12-14 07:11:31,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:11:31,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:11:31,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:11:31,970 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:11:31,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 07:11:32,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:11:32,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:11:32,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:11:32,150 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 07:11:32,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:11:32,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283093788] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:11:32,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:11:32,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 07:11:32,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052114658] [2022-12-14 07:11:32,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:11:32,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:11:32,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:11:32,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:11:32,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:11:32,154 INFO L87 Difference]: Start difference. First operand 1846 states and 3564 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 07:11:32,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:11:32,571 INFO L93 Difference]: Finished difference Result 2239 states and 4145 transitions. [2022-12-14 07:11:32,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:11:32,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 87 [2022-12-14 07:11:32,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:11:32,579 INFO L225 Difference]: With dead ends: 2239 [2022-12-14 07:11:32,580 INFO L226 Difference]: Without dead ends: 2039 [2022-12-14 07:11:32,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:11:32,582 INFO L413 NwaCegarLoop]: 3224 mSDtfsCounter, 3399 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3399 SdHoareTripleChecker+Valid, 3344 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:11:32,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3399 Valid, 3344 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:11:32,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2039 states. [2022-12-14 07:11:32,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2039 to 2035. [2022-12-14 07:11:32,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2035 states, 1947 states have (on average 1.9049820236260915) internal successors, (3709), 1951 states have internal predecessors, (3709), 62 states have call successors, (62), 24 states have call predecessors, (62), 24 states have return successors, (62), 60 states have call predecessors, (62), 62 states have call successors, (62) [2022-12-14 07:11:32,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2035 states to 2035 states and 3833 transitions. [2022-12-14 07:11:32,639 INFO L78 Accepts]: Start accepts. Automaton has 2035 states and 3833 transitions. Word has length 87 [2022-12-14 07:11:32,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:11:32,639 INFO L495 AbstractCegarLoop]: Abstraction has 2035 states and 3833 transitions. [2022-12-14 07:11:32,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 07:11:32,640 INFO L276 IsEmpty]: Start isEmpty. Operand 2035 states and 3833 transitions. [2022-12-14 07:11:32,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 07:11:32,642 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:11:32,642 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:11:32,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 07:11:32,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:11:32,843 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:11:32,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:11:32,844 INFO L85 PathProgramCache]: Analyzing trace with hash 305440626, now seen corresponding path program 1 times [2022-12-14 07:11:32,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:11:32,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119220080] [2022-12-14 07:11:32,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:11:32,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:11:32,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:11:32,953 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 07:11:32,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:11:32,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119220080] [2022-12-14 07:11:32,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119220080] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:11:32,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333458273] [2022-12-14 07:11:32,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:11:32,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:11:32,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:11:32,955 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:11:32,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 07:11:33,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:11:33,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:11:33,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:11:33,095 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 07:11:33,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:11:33,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333458273] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:11:33,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:11:33,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 07:11:33,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537477098] [2022-12-14 07:11:33,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:11:33,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:11:33,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:11:33,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:11:33,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:11:33,097 INFO L87 Difference]: Start difference. First operand 2035 states and 3833 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 07:11:33,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:11:33,503 INFO L93 Difference]: Finished difference Result 2800 states and 4956 transitions. [2022-12-14 07:11:33,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:11:33,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 87 [2022-12-14 07:11:33,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:11:33,514 INFO L225 Difference]: With dead ends: 2800 [2022-12-14 07:11:33,514 INFO L226 Difference]: Without dead ends: 2411 [2022-12-14 07:11:33,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:11:33,518 INFO L413 NwaCegarLoop]: 3223 mSDtfsCounter, 3402 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3402 SdHoareTripleChecker+Valid, 3343 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:11:33,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3402 Valid, 3343 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:11:33,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2022-12-14 07:11:33,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 2405. [2022-12-14 07:11:33,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2405 states, 2239 states have (on average 1.8414470745868692) internal successors, (4123), 2245 states have internal predecessors, (4123), 116 states have call successors, (116), 48 states have call predecessors, (116), 48 states have return successors, (116), 112 states have call predecessors, (116), 116 states have call successors, (116) [2022-12-14 07:11:33,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2405 states to 2405 states and 4355 transitions. [2022-12-14 07:11:33,603 INFO L78 Accepts]: Start accepts. Automaton has 2405 states and 4355 transitions. Word has length 87 [2022-12-14 07:11:33,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:11:33,603 INFO L495 AbstractCegarLoop]: Abstraction has 2405 states and 4355 transitions. [2022-12-14 07:11:33,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 07:11:33,604 INFO L276 IsEmpty]: Start isEmpty. Operand 2405 states and 4355 transitions. [2022-12-14 07:11:33,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 07:11:33,608 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:11:33,608 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:11:33,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 07:11:33,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:11:33,809 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:11:33,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:11:33,811 INFO L85 PathProgramCache]: Analyzing trace with hash -416453200, now seen corresponding path program 1 times [2022-12-14 07:11:33,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:11:33,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787423317] [2022-12-14 07:11:33,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:11:33,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:11:33,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:11:34,009 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 07:11:34,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:11:34,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787423317] [2022-12-14 07:11:34,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787423317] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:11:34,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336885135] [2022-12-14 07:11:34,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:11:34,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:11:34,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:11:34,011 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:11:34,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 07:11:34,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:11:34,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:11:34,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:11:34,142 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 07:11:34,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:11:34,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336885135] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:11:34,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:11:34,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 07:11:34,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133480910] [2022-12-14 07:11:34,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:11:34,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:11:34,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:11:34,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:11:34,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:11:34,144 INFO L87 Difference]: Start difference. First operand 2405 states and 4355 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 07:11:34,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:11:34,524 INFO L93 Difference]: Finished difference Result 3898 states and 6528 transitions. [2022-12-14 07:11:34,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:11:34,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 87 [2022-12-14 07:11:34,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:11:34,539 INFO L225 Difference]: With dead ends: 3898 [2022-12-14 07:11:34,539 INFO L226 Difference]: Without dead ends: 3139 [2022-12-14 07:11:34,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:11:34,543 INFO L413 NwaCegarLoop]: 3198 mSDtfsCounter, 3393 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3393 SdHoareTripleChecker+Valid, 3318 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:11:34,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3393 Valid, 3318 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:11:34,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3139 states. [2022-12-14 07:11:34,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3139 to 3129. [2022-12-14 07:11:34,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3129 states, 2811 states have (on average 1.7527570259694059) internal successors, (4927), 2821 states have internal predecessors, (4927), 220 states have call successors, (220), 96 states have call predecessors, (220), 96 states have return successors, (220), 212 states have call predecessors, (220), 220 states have call successors, (220) [2022-12-14 07:11:34,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3129 states to 3129 states and 5367 transitions. [2022-12-14 07:11:34,635 INFO L78 Accepts]: Start accepts. Automaton has 3129 states and 5367 transitions. Word has length 87 [2022-12-14 07:11:34,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:11:34,635 INFO L495 AbstractCegarLoop]: Abstraction has 3129 states and 5367 transitions. [2022-12-14 07:11:34,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 07:11:34,635 INFO L276 IsEmpty]: Start isEmpty. Operand 3129 states and 5367 transitions. [2022-12-14 07:11:34,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 07:11:34,640 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:11:34,640 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:11:34,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 07:11:34,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-12-14 07:11:34,841 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:11:34,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:11:34,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1445525070, now seen corresponding path program 1 times [2022-12-14 07:11:34,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:11:34,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41573790] [2022-12-14 07:11:34,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:11:34,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:11:34,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:11:34,940 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 07:11:34,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:11:34,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41573790] [2022-12-14 07:11:34,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41573790] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:11:34,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:11:34,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:11:34,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134609015] [2022-12-14 07:11:34,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:11:34,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:11:34,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:11:34,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:11:34,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:11:34,942 INFO L87 Difference]: Start difference. First operand 3129 states and 5367 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 07:11:35,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:11:35,369 INFO L93 Difference]: Finished difference Result 4283 states and 7048 transitions. [2022-12-14 07:11:35,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:11:35,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 87 [2022-12-14 07:11:35,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:11:35,379 INFO L225 Difference]: With dead ends: 4283 [2022-12-14 07:11:35,380 INFO L226 Difference]: Without dead ends: 3521 [2022-12-14 07:11:35,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:11:35,383 INFO L413 NwaCegarLoop]: 3252 mSDtfsCounter, 64 mSDsluCounter, 3190 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 6442 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:11:35,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 6442 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:11:35,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3521 states. [2022-12-14 07:11:35,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3521 to 3373. [2022-12-14 07:11:35,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3373 states, 3039 states have (on average 1.7476143468246133) internal successors, (5311), 3049 states have internal predecessors, (5311), 228 states have call successors, (228), 104 states have call predecessors, (228), 104 states have return successors, (228), 220 states have call predecessors, (228), 228 states have call successors, (228) [2022-12-14 07:11:35,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3373 states to 3373 states and 5767 transitions. [2022-12-14 07:11:35,469 INFO L78 Accepts]: Start accepts. Automaton has 3373 states and 5767 transitions. Word has length 87 [2022-12-14 07:11:35,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:11:35,469 INFO L495 AbstractCegarLoop]: Abstraction has 3373 states and 5767 transitions. [2022-12-14 07:11:35,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 07:11:35,470 INFO L276 IsEmpty]: Start isEmpty. Operand 3373 states and 5767 transitions. [2022-12-14 07:11:35,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 07:11:35,476 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:11:35,476 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:11:35,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 07:11:35,476 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:11:35,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:11:35,477 INFO L85 PathProgramCache]: Analyzing trace with hash 514423860, now seen corresponding path program 1 times [2022-12-14 07:11:35,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:11:35,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268693720] [2022-12-14 07:11:35,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:11:35,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:11:35,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:11:35,529 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-14 07:11:35,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:11:35,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268693720] [2022-12-14 07:11:35,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268693720] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:11:35,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:11:35,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:11:35,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009924608] [2022-12-14 07:11:35,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:11:35,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:11:35,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:11:35,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:11:35,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:11:35,532 INFO L87 Difference]: Start difference. First operand 3373 states and 5767 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 07:11:35,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:11:35,927 INFO L93 Difference]: Finished difference Result 6754 states and 10724 transitions. [2022-12-14 07:11:35,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:11:35,927 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 116 [2022-12-14 07:11:35,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:11:35,943 INFO L225 Difference]: With dead ends: 6754 [2022-12-14 07:11:35,943 INFO L226 Difference]: Without dead ends: 5027 [2022-12-14 07:11:35,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:11:35,949 INFO L413 NwaCegarLoop]: 3200 mSDtfsCounter, 3393 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3393 SdHoareTripleChecker+Valid, 3320 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:11:35,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3393 Valid, 3320 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:11:35,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5027 states. [2022-12-14 07:11:36,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5027 to 5001. [2022-12-14 07:11:36,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5001 states, 4355 states have (on average 1.6512055109070034) internal successors, (7191), 4373 states have internal predecessors, (7191), 436 states have call successors, (436), 208 states have call predecessors, (436), 208 states have return successors, (436), 420 states have call predecessors, (436), 436 states have call successors, (436) [2022-12-14 07:11:36,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5001 states to 5001 states and 8063 transitions. [2022-12-14 07:11:36,068 INFO L78 Accepts]: Start accepts. Automaton has 5001 states and 8063 transitions. Word has length 116 [2022-12-14 07:11:36,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:11:36,068 INFO L495 AbstractCegarLoop]: Abstraction has 5001 states and 8063 transitions. [2022-12-14 07:11:36,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 07:11:36,068 INFO L276 IsEmpty]: Start isEmpty. Operand 5001 states and 8063 transitions. [2022-12-14 07:11:36,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 07:11:36,074 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:11:36,074 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:11:36,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 07:11:36,075 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:11:36,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:11:36,075 INFO L85 PathProgramCache]: Analyzing trace with hash 48410376, now seen corresponding path program 1 times [2022-12-14 07:11:36,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:11:36,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873170552] [2022-12-14 07:11:36,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:11:36,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:11:36,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:11:36,126 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-14 07:11:36,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:11:36,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873170552] [2022-12-14 07:11:36,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873170552] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:11:36,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:11:36,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:11:36,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642612316] [2022-12-14 07:11:36,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:11:36,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:11:36,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:11:36,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:11:36,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:11:36,128 INFO L87 Difference]: Start difference. First operand 5001 states and 8063 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 07:11:36,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:11:36,587 INFO L93 Difference]: Finished difference Result 11566 states and 17572 transitions. [2022-12-14 07:11:36,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:11:36,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 116 [2022-12-14 07:11:36,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:11:36,609 INFO L225 Difference]: With dead ends: 11566 [2022-12-14 07:11:36,609 INFO L226 Difference]: Without dead ends: 8211 [2022-12-14 07:11:36,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:11:36,617 INFO L413 NwaCegarLoop]: 3214 mSDtfsCounter, 3396 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3396 SdHoareTripleChecker+Valid, 3334 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:11:36,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3396 Valid, 3334 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:11:36,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8211 states. [2022-12-14 07:11:36,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8211 to 8161. [2022-12-14 07:11:36,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8161 states, 6907 states have (on average 1.5623280729694513) internal successors, (10791), 6941 states have internal predecessors, (10791), 836 states have call successors, (836), 416 states have call predecessors, (836), 416 states have return successors, (836), 804 states have call predecessors, (836), 836 states have call successors, (836) [2022-12-14 07:11:36,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8161 states to 8161 states and 12463 transitions. [2022-12-14 07:11:36,824 INFO L78 Accepts]: Start accepts. Automaton has 8161 states and 12463 transitions. Word has length 116 [2022-12-14 07:11:36,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:11:36,824 INFO L495 AbstractCegarLoop]: Abstraction has 8161 states and 12463 transitions. [2022-12-14 07:11:36,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 07:11:36,824 INFO L276 IsEmpty]: Start isEmpty. Operand 8161 states and 12463 transitions. [2022-12-14 07:11:36,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 07:11:36,837 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:11:36,837 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:11:36,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 07:11:36,837 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:11:36,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:11:36,838 INFO L85 PathProgramCache]: Analyzing trace with hash 2064294635, now seen corresponding path program 1 times [2022-12-14 07:11:36,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:11:36,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387949859] [2022-12-14 07:11:36,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:11:36,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:11:36,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:11:36,920 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-12-14 07:11:36,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:11:36,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387949859] [2022-12-14 07:11:36,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387949859] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:11:36,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931073509] [2022-12-14 07:11:36,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:11:36,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:11:36,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:11:36,922 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:11:36,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 07:11:37,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:11:37,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:11:37,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:11:37,082 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 07:11:37,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:11:37,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931073509] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:11:37,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:11:37,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 07:11:37,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554978937] [2022-12-14 07:11:37,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:11:37,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:11:37,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:11:37,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:11:37,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:11:37,084 INFO L87 Difference]: Start difference. First operand 8161 states and 12463 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 07:11:37,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:11:37,685 INFO L93 Difference]: Finished difference Result 13957 states and 20833 transitions. [2022-12-14 07:11:37,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:11:37,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 134 [2022-12-14 07:11:37,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:11:37,706 INFO L225 Difference]: With dead ends: 13957 [2022-12-14 07:11:37,706 INFO L226 Difference]: Without dead ends: 10627 [2022-12-14 07:11:37,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:11:37,712 INFO L413 NwaCegarLoop]: 3276 mSDtfsCounter, 95 mSDsluCounter, 3192 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 6468 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:11:37,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 6468 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:11:37,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10627 states. [2022-12-14 07:11:37,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10627 to 9393. [2022-12-14 07:11:37,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9393 states, 8043 states have (on average 1.5744125326370757) internal successors, (12663), 8077 states have internal predecessors, (12663), 884 states have call successors, (884), 464 states have call predecessors, (884), 464 states have return successors, (884), 852 states have call predecessors, (884), 884 states have call successors, (884) [2022-12-14 07:11:37,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9393 states to 9393 states and 14431 transitions. [2022-12-14 07:11:37,957 INFO L78 Accepts]: Start accepts. Automaton has 9393 states and 14431 transitions. Word has length 134 [2022-12-14 07:11:37,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:11:37,958 INFO L495 AbstractCegarLoop]: Abstraction has 9393 states and 14431 transitions. [2022-12-14 07:11:37,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 07:11:37,958 INFO L276 IsEmpty]: Start isEmpty. Operand 9393 states and 14431 transitions. [2022-12-14 07:11:37,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 07:11:37,974 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:11:37,974 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:11:37,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 07:11:38,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 07:11:38,175 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:11:38,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:11:38,176 INFO L85 PathProgramCache]: Analyzing trace with hash -559017552, now seen corresponding path program 2 times [2022-12-14 07:11:38,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:11:38,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763175151] [2022-12-14 07:11:38,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:11:38,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:11:38,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:11:38,453 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 07:11:38,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:11:38,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763175151] [2022-12-14 07:11:38,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763175151] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:11:38,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862900477] [2022-12-14 07:11:38,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:11:38,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:11:38,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:11:38,455 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:11:38,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73afac0a-4bf0-4e83-9142-4667fa0fca55/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 07:11:38,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 07:11:38,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:11:38,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 07:11:38,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:11:38,734 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 62 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 07:11:38,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:11:39,082 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 19 proven. 40 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 07:11:39,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862900477] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:11:39,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1892860129] [2022-12-14 07:11:39,099 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2022-12-14 07:11:39,099 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:11:39,101 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:11:39,106 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:11:39,106 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:12:02,649 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 157 for LOIs [2022-12-14 07:12:02,687 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2022-12-14 07:12:07,456 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12