./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 21399f6c1c6de0b812a418410b61643449f7872d7a63a6928748a1ba61200764 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 01:27:13,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:27:13,749 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:27:13,766 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:27:13,767 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:27:13,768 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:27:13,769 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:27:13,771 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:27:13,773 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:27:13,774 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:27:13,775 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:27:13,776 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:27:13,776 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:27:13,777 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:27:13,778 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:27:13,779 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:27:13,780 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:27:13,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:27:13,783 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:27:13,784 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:27:13,786 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:27:13,787 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:27:13,788 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:27:13,789 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:27:13,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:27:13,792 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:27:13,793 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:27:13,793 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:27:13,794 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:27:13,795 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:27:13,795 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:27:13,796 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:27:13,797 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:27:13,797 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:27:13,798 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:27:13,799 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:27:13,799 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:27:13,800 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:27:13,800 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:27:13,801 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:27:13,802 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:27:13,803 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 01:27:13,824 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:27:13,824 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:27:13,825 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:27:13,825 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:27:13,833 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:27:13,833 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:27:13,833 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:27:13,834 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:27:13,834 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:27:13,834 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:27:13,834 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:27:13,835 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:27:13,835 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:27:13,835 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:27:13,835 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:27:13,836 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:27:13,836 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:27:13,836 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:27:13,837 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:27:13,837 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:27:13,837 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:27:13,837 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:27:13,838 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:27:13,838 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:27:13,838 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:27:13,838 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:27:13,838 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:27:13,839 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:27:13,839 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:27:13,839 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:27:13,839 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:27:13,839 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:27:13,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:27:13,840 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:27:13,840 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:27:13,840 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:27:13,840 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:27:13,841 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:27:13,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:27:13,841 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:27:13,841 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:27:13,842 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_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 21399f6c1c6de0b812a418410b61643449f7872d7a63a6928748a1ba61200764 [2022-11-22 01:27:14,073 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:27:14,106 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:27:14,108 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:27:14,110 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:27:14,110 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:27:14,112 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-2.c [2022-11-22 01:27:17,126 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:27:17,755 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:27:17,756 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9167ec58-792d-4f8d-8889-d6822b435d42/sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-2.c [2022-11-22 01:27:17,812 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba/data/69b2972c5/2b01d207098d4d3382bb9fd20befe414/FLAG1f13bb7c6 [2022-11-22 01:27:17,834 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba/data/69b2972c5/2b01d207098d4d3382bb9fd20befe414 [2022-11-22 01:27:17,840 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:27:17,842 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:27:17,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:27:17,844 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:27:17,848 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:27:17,849 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:27:17" (1/1) ... [2022-11-22 01:27:17,851 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56aee95b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:27:17, skipping insertion in model container [2022-11-22 01:27:17,851 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:27:17" (1/1) ... [2022-11-22 01:27:17,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:27:18,203 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:27:20,680 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_9167ec58-792d-4f8d-8889-d6822b435d42/sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-2.c[382357,382370] [2022-11-22 01:27:20,712 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_9167ec58-792d-4f8d-8889-d6822b435d42/sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-2.c[383339,383352] [2022-11-22 01:27:20,984 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:27:20,995 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:27:22,242 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_9167ec58-792d-4f8d-8889-d6822b435d42/sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-2.c[382357,382370] [2022-11-22 01:27:22,246 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_9167ec58-792d-4f8d-8889-d6822b435d42/sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-2.c[383339,383352] [2022-11-22 01:27:22,272 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:27:22,391 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:27:22,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:27:22 WrapperNode [2022-11-22 01:27:22,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:27:22,393 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:27:22,393 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:27:22,393 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:27:22,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:27:22" (1/1) ... [2022-11-22 01:27:22,525 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:27:22" (1/1) ... [2022-11-22 01:27:22,857 INFO L138 Inliner]: procedures = 54, calls = 57, calls flagged for inlining = 31, calls inlined = 31, statements flattened = 12798 [2022-11-22 01:27:22,858 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:27:22,859 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:27:22,859 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:27:22,859 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:27:22,870 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:27:22" (1/1) ... [2022-11-22 01:27:22,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:27:22" (1/1) ... [2022-11-22 01:27:23,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:27:22" (1/1) ... [2022-11-22 01:27:23,023 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:27:22" (1/1) ... [2022-11-22 01:27:23,241 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:27:22" (1/1) ... [2022-11-22 01:27:23,298 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:27:22" (1/1) ... [2022-11-22 01:27:23,361 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:27:22" (1/1) ... [2022-11-22 01:27:23,474 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:27:22" (1/1) ... [2022-11-22 01:27:23,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:27:23,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:27:23,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:27:23,604 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:27:23,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:27:22" (1/1) ... [2022-11-22 01:27:23,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:27:23,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:27:23,660 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:27:23,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:27:23,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:27:23,712 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-22 01:27:23,712 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-22 01:27:23,713 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-22 01:27:23,713 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-22 01:27:23,713 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-22 01:27:23,713 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-22 01:27:23,713 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-11-22 01:27:23,714 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-11-22 01:27:23,714 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-22 01:27:23,714 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-22 01:27:23,714 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-22 01:27:23,714 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-22 01:27:23,714 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-22 01:27:23,715 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-22 01:27:23,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:27:23,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:27:23,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:27:23,922 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:27:23,941 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:27:33,716 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:27:36,259 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:27:36,260 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-11-22 01:27:36,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:27:36 BoogieIcfgContainer [2022-11-22 01:27:36,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:27:36,269 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:27:36,270 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:27:36,274 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:27:36,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:27:17" (1/3) ... [2022-11-22 01:27:36,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4847a4e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:27:36, skipping insertion in model container [2022-11-22 01:27:36,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:27:22" (2/3) ... [2022-11-22 01:27:36,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4847a4e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:27:36, skipping insertion in model container [2022-11-22 01:27:36,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:27:36" (3/3) ... [2022-11-22 01:27:36,278 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.05.cil-2.c [2022-11-22 01:27:36,300 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:27:36,300 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-22 01:27:36,391 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:27:36,398 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;@1ffdee81, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:27:36,398 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-22 01:27:36,544 INFO L276 IsEmpty]: Start isEmpty. Operand has 1760 states, 1729 states have (on average 1.9705031810294968) internal successors, (3407), 1734 states have internal predecessors, (3407), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-22 01:27:36,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-22 01:27:36,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:27:36,562 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:27:36,563 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:27:36,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:27:36,571 INFO L85 PathProgramCache]: Analyzing trace with hash 657991336, now seen corresponding path program 1 times [2022-11-22 01:27:36,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:27:36,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364336768] [2022-11-22 01:27:36,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:27:36,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:27:36,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:27:37,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:27:37,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:27:37,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364336768] [2022-11-22 01:27:37,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364336768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:27:37,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:27:37,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:27:37,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793581009] [2022-11-22 01:27:37,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:27:37,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:27:37,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:27:37,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:27:37,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:27:37,145 INFO L87 Difference]: Start difference. First operand has 1760 states, 1729 states have (on average 1.9705031810294968) internal successors, (3407), 1734 states have internal predecessors, (3407), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) 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, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-22 01:27:38,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:27:38,390 INFO L93 Difference]: Finished difference Result 3613 states and 7055 transitions. [2022-11-22 01:27:38,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:27:38,393 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, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 47 [2022-11-22 01:27:38,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:27:38,413 INFO L225 Difference]: With dead ends: 3613 [2022-11-22 01:27:38,414 INFO L226 Difference]: Without dead ends: 1852 [2022-11-22 01:27:38,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:27:38,427 INFO L413 NwaCegarLoop]: 3308 mSDtfsCounter, 3556 mSDsluCounter, 3236 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3556 SdHoareTripleChecker+Valid, 6544 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:27:38,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3556 Valid, 6544 Invalid, 632 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 01:27:38,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2022-11-22 01:27:38,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1851. [2022-11-22 01:27:38,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1851 states, 1801 states have (on average 1.9444752915047196) internal successors, (3502), 1805 states have internal predecessors, (3502), 36 states have call successors, (36), 13 states have call predecessors, (36), 12 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-22 01:27:38,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1851 states to 1851 states and 3572 transitions. [2022-11-22 01:27:38,554 INFO L78 Accepts]: Start accepts. Automaton has 1851 states and 3572 transitions. Word has length 47 [2022-11-22 01:27:38,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:27:38,555 INFO L495 AbstractCegarLoop]: Abstraction has 1851 states and 3572 transitions. [2022-11-22 01:27:38,555 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, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-22 01:27:38,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1851 states and 3572 transitions. [2022-11-22 01:27:38,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-22 01:27:38,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:27:38,560 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, 1] [2022-11-22 01:27:38,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:27:38,561 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:27:38,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:27:38,562 INFO L85 PathProgramCache]: Analyzing trace with hash -699988314, now seen corresponding path program 1 times [2022-11-22 01:27:38,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:27:38,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483809592] [2022-11-22 01:27:38,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:27:38,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:27:38,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:27:38,867 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 01:27:38,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:27:38,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483809592] [2022-11-22 01:27:38,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483809592] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:27:38,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634424865] [2022-11-22 01:27:38,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:27:38,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:27:38,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:27:38,873 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:27:38,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:27:39,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:27:39,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 01:27:39,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:27:39,161 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-22 01:27:39,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:27:39,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634424865] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:27:39,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:27:39,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 01:27:39,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788811783] [2022-11-22 01:27:39,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:27:39,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:27:39,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:27:39,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:27:39,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:27:39,176 INFO L87 Difference]: Start difference. First operand 1851 states and 3572 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 01:27:39,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:27:39,700 INFO L93 Difference]: Finished difference Result 2254 states and 4169 transitions. [2022-11-22 01:27:39,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:27:39,701 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 88 [2022-11-22 01:27:39,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:27:39,717 INFO L225 Difference]: With dead ends: 2254 [2022-11-22 01:27:39,718 INFO L226 Difference]: Without dead ends: 2049 [2022-11-22 01:27:39,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:27:39,722 INFO L413 NwaCegarLoop]: 3238 mSDtfsCounter, 3410 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3410 SdHoareTripleChecker+Valid, 3365 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:27:39,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3410 Valid, 3365 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:27:39,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2022-11-22 01:27:39,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 2043. [2022-11-22 01:27:39,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2043 states, 1953 states have (on average 1.905273937532002) internal successors, (3721), 1958 states have internal predecessors, (3721), 64 states have call successors, (64), 25 states have call predecessors, (64), 24 states have return successors, (62), 60 states have call predecessors, (62), 62 states have call successors, (62) [2022-11-22 01:27:39,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2043 states to 2043 states and 3847 transitions. [2022-11-22 01:27:39,808 INFO L78 Accepts]: Start accepts. Automaton has 2043 states and 3847 transitions. Word has length 88 [2022-11-22 01:27:39,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:27:39,809 INFO L495 AbstractCegarLoop]: Abstraction has 2043 states and 3847 transitions. [2022-11-22 01:27:39,809 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 01:27:39,809 INFO L276 IsEmpty]: Start isEmpty. Operand 2043 states and 3847 transitions. [2022-11-22 01:27:39,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-22 01:27:39,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:27:39,814 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, 1] [2022-11-22 01:27:39,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-22 01:27:40,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:27:40,021 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:27:40,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:27:40,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1603860440, now seen corresponding path program 1 times [2022-11-22 01:27:40,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:27:40,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122449868] [2022-11-22 01:27:40,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:27:40,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:27:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:27:40,182 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 01:27:40,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:27:40,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122449868] [2022-11-22 01:27:40,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122449868] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:27:40,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174209160] [2022-11-22 01:27:40,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:27:40,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:27:40,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:27:40,189 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:27:40,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:27:40,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:27:40,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 01:27:40,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:27:40,436 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 01:27:40,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:27:40,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174209160] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:27:40,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:27:40,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 01:27:40,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553075208] [2022-11-22 01:27:40,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:27:40,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:27:40,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:27:40,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:27:40,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:27:40,440 INFO L87 Difference]: Start difference. First operand 2043 states and 3847 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 01:27:40,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:27:40,999 INFO L93 Difference]: Finished difference Result 2824 states and 4998 transitions. [2022-11-22 01:27:41,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:27:41,000 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 88 [2022-11-22 01:27:41,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:27:41,041 INFO L225 Difference]: With dead ends: 2824 [2022-11-22 01:27:41,041 INFO L226 Difference]: Without dead ends: 2427 [2022-11-22 01:27:41,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:27:41,045 INFO L413 NwaCegarLoop]: 3237 mSDtfsCounter, 3407 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3407 SdHoareTripleChecker+Valid, 3364 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:27:41,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3407 Valid, 3364 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 01:27:41,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2022-11-22 01:27:41,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 2419. [2022-11-22 01:27:41,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2419 states, 2251 states have (on average 1.842292314526877) internal successors, (4147), 2258 states have internal predecessors, (4147), 118 states have call successors, (118), 49 states have call predecessors, (118), 48 states have return successors, (116), 112 states have call predecessors, (116), 116 states have call successors, (116) [2022-11-22 01:27:41,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2419 states to 2419 states and 4381 transitions. [2022-11-22 01:27:41,178 INFO L78 Accepts]: Start accepts. Automaton has 2419 states and 4381 transitions. Word has length 88 [2022-11-22 01:27:41,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:27:41,180 INFO L495 AbstractCegarLoop]: Abstraction has 2419 states and 4381 transitions. [2022-11-22 01:27:41,180 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 01:27:41,180 INFO L276 IsEmpty]: Start isEmpty. Operand 2419 states and 4381 transitions. [2022-11-22 01:27:41,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-22 01:27:41,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:27:41,190 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, 1] [2022-11-22 01:27:41,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 01:27:41,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:27:41,397 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:27:41,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:27:41,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1152927206, now seen corresponding path program 1 times [2022-11-22 01:27:41,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:27:41,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416597396] [2022-11-22 01:27:41,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:27:41,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:27:41,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:27:41,610 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 01:27:41,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:27:41,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416597396] [2022-11-22 01:27:41,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416597396] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:27:41,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393333323] [2022-11-22 01:27:41,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:27:41,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:27:41,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:27:41,617 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:27:41,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 01:27:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:27:41,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 01:27:41,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:27:41,879 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:27:41,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:27:41,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393333323] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:27:41,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:27:41,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 01:27:41,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945460733] [2022-11-22 01:27:41,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:27:41,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:27:41,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:27:41,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:27:41,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:27:41,882 INFO L87 Difference]: Start difference. First operand 2419 states and 4381 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 01:27:42,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:27:42,547 INFO L93 Difference]: Finished difference Result 3940 states and 6606 transitions. [2022-11-22 01:27:42,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:27:42,548 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 88 [2022-11-22 01:27:42,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:27:42,562 INFO L225 Difference]: With dead ends: 3940 [2022-11-22 01:27:42,563 INFO L226 Difference]: Without dead ends: 3167 [2022-11-22 01:27:42,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:27:42,567 INFO L413 NwaCegarLoop]: 3205 mSDtfsCounter, 3401 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3401 SdHoareTripleChecker+Valid, 3332 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:27:42,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3401 Valid, 3332 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 01:27:42,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3167 states. [2022-11-22 01:27:42,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3167 to 3155. [2022-11-22 01:27:42,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3155 states, 2835 states have (on average 1.7548500881834215) internal successors, (4975), 2846 states have internal predecessors, (4975), 222 states have call successors, (222), 97 states have call predecessors, (222), 96 states have return successors, (220), 212 states have call predecessors, (220), 220 states have call successors, (220) [2022-11-22 01:27:42,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3155 states to 3155 states and 5417 transitions. [2022-11-22 01:27:42,696 INFO L78 Accepts]: Start accepts. Automaton has 3155 states and 5417 transitions. Word has length 88 [2022-11-22 01:27:42,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:27:42,696 INFO L495 AbstractCegarLoop]: Abstraction has 3155 states and 5417 transitions. [2022-11-22 01:27:42,696 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 01:27:42,697 INFO L276 IsEmpty]: Start isEmpty. Operand 3155 states and 5417 transitions. [2022-11-22 01:27:42,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-22 01:27:42,701 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:27:42,701 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, 1] [2022-11-22 01:27:42,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 01:27:42,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:27:42,907 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:27:42,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:27:42,908 INFO L85 PathProgramCache]: Analyzing trace with hash -683529692, now seen corresponding path program 1 times [2022-11-22 01:27:42,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:27:42,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047478385] [2022-11-22 01:27:42,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:27:42,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:27:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:27:43,011 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-22 01:27:43,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:27:43,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047478385] [2022-11-22 01:27:43,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047478385] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:27:43,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:27:43,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:27:43,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564522115] [2022-11-22 01:27:43,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:27:43,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:27:43,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:27:43,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:27:43,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:27:43,015 INFO L87 Difference]: Start difference. First operand 3155 states and 5417 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-22 01:27:43,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:27:43,687 INFO L93 Difference]: Finished difference Result 4335 states and 7148 transitions. [2022-11-22 01:27:43,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:27:43,688 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), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 88 [2022-11-22 01:27:43,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:27:43,707 INFO L225 Difference]: With dead ends: 4335 [2022-11-22 01:27:43,707 INFO L226 Difference]: Without dead ends: 3547 [2022-11-22 01:27:43,711 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 [2022-11-22 01:27:43,714 INFO L413 NwaCegarLoop]: 3259 mSDtfsCounter, 64 mSDsluCounter, 3197 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 6456 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:27:43,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 6456 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 01:27:43,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3547 states. [2022-11-22 01:27:43,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3547 to 3399. [2022-11-22 01:27:43,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3399 states, 3063 states have (on average 1.7495919033627163) internal successors, (5359), 3074 states have internal predecessors, (5359), 230 states have call successors, (230), 105 states have call predecessors, (230), 104 states have return successors, (228), 220 states have call predecessors, (228), 228 states have call successors, (228) [2022-11-22 01:27:43,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3399 states to 3399 states and 5817 transitions. [2022-11-22 01:27:43,878 INFO L78 Accepts]: Start accepts. Automaton has 3399 states and 5817 transitions. Word has length 88 [2022-11-22 01:27:43,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:27:43,881 INFO L495 AbstractCegarLoop]: Abstraction has 3399 states and 5817 transitions. [2022-11-22 01:27:43,881 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), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-22 01:27:43,881 INFO L276 IsEmpty]: Start isEmpty. Operand 3399 states and 5817 transitions. [2022-11-22 01:27:43,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-22 01:27:43,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:27:43,893 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, 1] [2022-11-22 01:27:43,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 01:27:43,893 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:27:43,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:27:43,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1193203548, now seen corresponding path program 1 times [2022-11-22 01:27:43,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:27:43,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813084557] [2022-11-22 01:27:43,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:27:43,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:27:43,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:27:43,985 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-22 01:27:43,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:27:43,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813084557] [2022-11-22 01:27:43,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813084557] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:27:43,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:27:43,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:27:43,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685602131] [2022-11-22 01:27:43,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:27:43,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:27:43,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:27:43,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:27:43,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:27:43,988 INFO L87 Difference]: Start difference. First operand 3399 states and 5817 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-22 01:27:44,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:27:44,599 INFO L93 Difference]: Finished difference Result 6832 states and 10874 transitions. [2022-11-22 01:27:44,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:27:44,599 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 117 [2022-11-22 01:27:44,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:27:44,622 INFO L225 Difference]: With dead ends: 6832 [2022-11-22 01:27:44,623 INFO L226 Difference]: Without dead ends: 5079 [2022-11-22 01:27:44,631 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 [2022-11-22 01:27:44,633 INFO L413 NwaCegarLoop]: 3207 mSDtfsCounter, 3401 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3401 SdHoareTripleChecker+Valid, 3334 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:27:44,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3401 Valid, 3334 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:27:44,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5079 states. [2022-11-22 01:27:44,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5079 to 5051. [2022-11-22 01:27:44,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5051 states, 4403 states have (on average 1.6550079491255962) internal successors, (7287), 4422 states have internal predecessors, (7287), 438 states have call successors, (438), 209 states have call predecessors, (438), 208 states have return successors, (436), 420 states have call predecessors, (436), 436 states have call successors, (436) [2022-11-22 01:27:44,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5051 states to 5051 states and 8161 transitions. [2022-11-22 01:27:44,971 INFO L78 Accepts]: Start accepts. Automaton has 5051 states and 8161 transitions. Word has length 117 [2022-11-22 01:27:44,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:27:44,972 INFO L495 AbstractCegarLoop]: Abstraction has 5051 states and 8161 transitions. [2022-11-22 01:27:44,973 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-22 01:27:44,973 INFO L276 IsEmpty]: Start isEmpty. Operand 5051 states and 8161 transitions. [2022-11-22 01:27:44,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-22 01:27:44,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:27:44,985 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, 1] [2022-11-22 01:27:44,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 01:27:44,986 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:27:44,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:27:44,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1594967020, now seen corresponding path program 1 times [2022-11-22 01:27:44,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:27:44,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249511763] [2022-11-22 01:27:44,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:27:44,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:27:45,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:27:45,099 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-22 01:27:45,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:27:45,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249511763] [2022-11-22 01:27:45,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249511763] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:27:45,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:27:45,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:27:45,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031407610] [2022-11-22 01:27:45,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:27:45,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:27:45,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:27:45,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:27:45,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:27:45,103 INFO L87 Difference]: Start difference. First operand 5051 states and 8161 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-22 01:27:45,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:27:45,985 INFO L93 Difference]: Finished difference Result 11716 states and 17866 transitions. [2022-11-22 01:27:45,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:27:45,986 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 117 [2022-11-22 01:27:45,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:27:46,058 INFO L225 Difference]: With dead ends: 11716 [2022-11-22 01:27:46,059 INFO L226 Difference]: Without dead ends: 8311 [2022-11-22 01:27:46,076 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 [2022-11-22 01:27:46,078 INFO L413 NwaCegarLoop]: 3228 mSDtfsCounter, 3404 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3404 SdHoareTripleChecker+Valid, 3355 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:27:46,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3404 Valid, 3355 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:27:46,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8311 states. [2022-11-22 01:27:46,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8311 to 8259. [2022-11-22 01:27:46,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8259 states, 7003 states have (on average 1.5683278594887906) internal successors, (10983), 7038 states have internal predecessors, (10983), 838 states have call successors, (838), 417 states have call predecessors, (838), 416 states have return successors, (836), 804 states have call predecessors, (836), 836 states have call successors, (836) [2022-11-22 01:27:46,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8259 states to 8259 states and 12657 transitions. [2022-11-22 01:27:46,651 INFO L78 Accepts]: Start accepts. Automaton has 8259 states and 12657 transitions. Word has length 117 [2022-11-22 01:27:46,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:27:46,652 INFO L495 AbstractCegarLoop]: Abstraction has 8259 states and 12657 transitions. [2022-11-22 01:27:46,652 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-22 01:27:46,653 INFO L276 IsEmpty]: Start isEmpty. Operand 8259 states and 12657 transitions. [2022-11-22 01:27:46,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-22 01:27:46,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:27:46,683 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, 1] [2022-11-22 01:27:46,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 01:27:46,683 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:27:46,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:27:46,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1039708336, now seen corresponding path program 1 times [2022-11-22 01:27:46,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:27:46,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563988390] [2022-11-22 01:27:46,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:27:46,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:27:46,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:27:46,868 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-22 01:27:46,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:27:46,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563988390] [2022-11-22 01:27:46,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563988390] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:27:46,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409623537] [2022-11-22 01:27:46,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:27:46,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:27:46,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:27:46,871 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:27:46,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 01:27:47,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:27:47,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 01:27:47,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:27:47,129 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-22 01:27:47,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:27:47,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409623537] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:27:47,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:27:47,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-22 01:27:47,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233787802] [2022-11-22 01:27:47,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:27:47,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:27:47,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:27:47,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:27:47,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:27:47,139 INFO L87 Difference]: Start difference. First operand 8259 states and 12657 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, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-22 01:27:48,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:27:48,211 INFO L93 Difference]: Finished difference Result 14155 states and 21223 transitions. [2022-11-22 01:27:48,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:27:48,212 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, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 135 [2022-11-22 01:27:48,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:27:48,257 INFO L225 Difference]: With dead ends: 14155 [2022-11-22 01:27:48,257 INFO L226 Difference]: Without dead ends: 10775 [2022-11-22 01:27:48,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:27:48,272 INFO L413 NwaCegarLoop]: 3283 mSDtfsCounter, 103 mSDsluCounter, 3199 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 6482 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:27:48,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 6482 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 01:27:48,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10775 states. [2022-11-22 01:27:48,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10775 to 9491. [2022-11-22 01:27:48,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9491 states, 8139 states have (on average 1.5794323626981202) internal successors, (12855), 8174 states have internal predecessors, (12855), 886 states have call successors, (886), 465 states have call predecessors, (886), 464 states have return successors, (884), 852 states have call predecessors, (884), 884 states have call successors, (884) [2022-11-22 01:27:48,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9491 states to 9491 states and 14625 transitions. [2022-11-22 01:27:48,803 INFO L78 Accepts]: Start accepts. Automaton has 9491 states and 14625 transitions. Word has length 135 [2022-11-22 01:27:48,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:27:48,805 INFO L495 AbstractCegarLoop]: Abstraction has 9491 states and 14625 transitions. [2022-11-22 01:27:48,805 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, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-22 01:27:48,805 INFO L276 IsEmpty]: Start isEmpty. Operand 9491 states and 14625 transitions. [2022-11-22 01:27:48,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-22 01:27:48,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:27:48,832 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, 1] [2022-11-22 01:27:48,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 01:27:49,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-22 01:27:49,039 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:27:49,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:27:49,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1660590909, now seen corresponding path program 2 times [2022-11-22 01:27:49,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:27:49,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164678994] [2022-11-22 01:27:49,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:27:49,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:27:49,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:27:49,440 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-22 01:27:49,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:27:49,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164678994] [2022-11-22 01:27:49,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164678994] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:27:49,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743619282] [2022-11-22 01:27:49,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:27:49,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:27:49,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:27:49,454 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:27:49,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9167ec58-792d-4f8d-8889-d6822b435d42/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 01:27:49,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 01:27:49,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:27:49,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 01:27:49,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:27:49,997 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 62 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 01:27:49,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:27:50,621 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 19 proven. 40 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-22 01:27:50,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743619282] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:27:50,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1672132436] [2022-11-22 01:27:50,648 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2022-11-22 01:27:50,648 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:27:50,652 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:27:50,658 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:27:50,659 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:28:15,396 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 78 for LOIs [2022-11-22 01:28:15,403 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 157 for LOIs [2022-11-22 01:28:15,447 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2022-11-22 01:28:22,571 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12