./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.14.cil.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_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/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_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.14.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/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_0bd7993e-a093-415e-abd0-2e88cb584967/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 b4ef8e9ed2cd06e3f1b2681e4efb1f48663612c7770f819d08e3f1f515d36787 --- 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 01:36:51,343 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:36:51,345 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:36:51,374 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:36:51,375 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:36:51,379 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:36:51,381 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:36:51,385 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:36:51,387 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:36:51,393 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:36:51,394 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:36:51,396 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:36:51,397 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:36:51,400 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:36:51,402 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:36:51,403 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:36:51,405 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:36:51,406 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:36:51,408 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:36:51,414 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:36:51,416 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:36:51,418 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:36:51,419 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:36:51,420 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:36:51,430 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:36:51,431 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:36:51,431 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:36:51,433 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:36:51,434 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:36:51,435 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:36:51,436 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:36:51,437 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:36:51,439 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:36:51,441 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:36:51,443 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:36:51,443 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:36:51,444 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:36:51,445 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:36:51,445 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:36:51,447 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:36:51,447 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:36:51,448 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 01:36:51,485 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:36:51,486 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:36:51,486 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:36:51,487 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:36:51,488 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:36:51,488 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:36:51,488 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:36:51,489 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:36:51,489 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:36:51,489 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:36:51,490 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:36:51,490 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:36:51,491 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:36:51,491 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:36:51,491 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:36:51,491 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:36:51,492 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:36:51,492 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:36:51,493 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:36:51,494 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:36:51,495 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:36:51,499 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:36:51,499 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:36:51,499 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:36:51,499 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:36:51,499 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:36:51,500 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:36:51,500 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:36:51,500 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:36:51,500 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:36:51,500 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:36:51,501 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:36:51,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:36:51,501 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:36:51,501 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:36:51,501 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:36:51,502 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:36:51,502 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:36:51,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:36:51,502 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:36:51,502 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:36:51,502 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_0bd7993e-a093-415e-abd0-2e88cb584967/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b4ef8e9ed2cd06e3f1b2681e4efb1f48663612c7770f819d08e3f1f515d36787 [2022-11-22 01:36:51,727 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:36:51,748 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:36:51,751 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:36:51,752 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:36:51,753 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:36:51,754 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.14.cil.c [2022-11-22 01:36:54,880 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:36:55,695 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:36:55,696 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/sv-benchmarks/c/combinations/Problem05_label46+token_ring.14.cil.c [2022-11-22 01:36:55,748 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/data/f4cbbab8d/cba96cfd5e8e4936845a149beeda68b4/FLAG2b1e80241 [2022-11-22 01:36:55,767 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/data/f4cbbab8d/cba96cfd5e8e4936845a149beeda68b4 [2022-11-22 01:36:55,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:36:55,775 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:36:55,780 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:36:55,780 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:36:55,785 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:36:55,787 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:36:55" (1/1) ... [2022-11-22 01:36:55,789 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@758ca041 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:36:55, skipping insertion in model container [2022-11-22 01:36:55,789 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:36:55" (1/1) ... [2022-11-22 01:36:55,798 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:36:56,122 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:36:58,435 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_0bd7993e-a093-415e-abd0-2e88cb584967/sv-benchmarks/c/combinations/Problem05_label46+token_ring.14.cil.c[382357,382370] [2022-11-22 01:36:58,462 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_0bd7993e-a093-415e-abd0-2e88cb584967/sv-benchmarks/c/combinations/Problem05_label46+token_ring.14.cil.c[383339,383352] [2022-11-22 01:36:58,797 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:36:58,812 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:37:00,090 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_0bd7993e-a093-415e-abd0-2e88cb584967/sv-benchmarks/c/combinations/Problem05_label46+token_ring.14.cil.c[382357,382370] [2022-11-22 01:37:00,095 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_0bd7993e-a093-415e-abd0-2e88cb584967/sv-benchmarks/c/combinations/Problem05_label46+token_ring.14.cil.c[383339,383352] [2022-11-22 01:37:00,136 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:37:00,203 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:37:00,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:00 WrapperNode [2022-11-22 01:37:00,204 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:37:00,205 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:37:00,205 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:37:00,206 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:37:00,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:00" (1/1) ... [2022-11-22 01:37:00,297 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:00" (1/1) ... [2022-11-22 01:37:00,928 INFO L138 Inliner]: procedures = 68, calls = 78, calls flagged for inlining = 45, calls inlined = 45, statements flattened = 13202 [2022-11-22 01:37:00,935 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:37:00,936 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:37:00,936 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:37:00,936 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:37:00,946 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:00" (1/1) ... [2022-11-22 01:37:00,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:00" (1/1) ... [2022-11-22 01:37:01,038 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:00" (1/1) ... [2022-11-22 01:37:01,039 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:00" (1/1) ... [2022-11-22 01:37:01,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:00" (1/1) ... [2022-11-22 01:37:01,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:00" (1/1) ... [2022-11-22 01:37:01,425 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:00" (1/1) ... [2022-11-22 01:37:01,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:00" (1/1) ... [2022-11-22 01:37:01,517 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:37:01,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:37:01,522 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:37:01,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:37:01,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:00" (1/1) ... [2022-11-22 01:37:01,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:37:01,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:37:01,573 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:37:01,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:37:01,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:37:01,697 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-22 01:37:01,698 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-22 01:37:01,698 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-22 01:37:01,698 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-22 01:37:01,698 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-22 01:37:01,698 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-22 01:37:01,699 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-11-22 01:37:01,699 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-11-22 01:37:01,699 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-22 01:37:01,699 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-22 01:37:01,699 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-22 01:37:01,699 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-22 01:37:01,700 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-22 01:37:01,700 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-22 01:37:01,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:37:01,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:37:01,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:37:01,955 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:37:01,957 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:37:11,280 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:37:14,062 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:37:14,063 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-11-22 01:37:14,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:37:14 BoogieIcfgContainer [2022-11-22 01:37:14,068 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:37:14,070 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:37:14,070 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:37:14,074 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:37:14,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:36:55" (1/3) ... [2022-11-22 01:37:14,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50153792 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:37:14, skipping insertion in model container [2022-11-22 01:37:14,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:37:00" (2/3) ... [2022-11-22 01:37:14,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50153792 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:37:14, skipping insertion in model container [2022-11-22 01:37:14,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:37:14" (3/3) ... [2022-11-22 01:37:14,077 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.14.cil.c [2022-11-22 01:37:14,100 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:37:14,101 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-22 01:37:14,201 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:37:14,208 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;@db53bac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:37:14,208 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-22 01:37:14,219 INFO L276 IsEmpty]: Start isEmpty. Operand has 1837 states, 1799 states have (on average 1.9560867148415786) internal successors, (3519), 1804 states have internal predecessors, (3519), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-22 01:37:14,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-22 01:37:14,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:37:14,233 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:37:14,233 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:37:14,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:37:14,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1082935052, now seen corresponding path program 1 times [2022-11-22 01:37:14,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:37:14,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846684921] [2022-11-22 01:37:14,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:37:14,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:37:14,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:37:14,760 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 01:37:14,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:37:14,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846684921] [2022-11-22 01:37:14,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846684921] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:37:14,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:37:14,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:37:14,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398724740] [2022-11-22 01:37:14,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:37:14,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:37:14,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:37:14,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:37:14,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:37:14,814 INFO L87 Difference]: Start difference. First operand has 1837 states, 1799 states have (on average 1.9560867148415786) internal successors, (3519), 1804 states have internal predecessors, (3519), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 01:37:16,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:37:16,207 INFO L93 Difference]: Finished difference Result 3844 states and 7447 transitions. [2022-11-22 01:37:16,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:37:16,213 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 68 [2022-11-22 01:37:16,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:37:16,239 INFO L225 Difference]: With dead ends: 3844 [2022-11-22 01:37:16,240 INFO L226 Difference]: Without dead ends: 2006 [2022-11-22 01:37:16,250 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 01:37:16,255 INFO L413 NwaCegarLoop]: 3519 mSDtfsCounter, 3787 mSDsluCounter, 3419 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3787 SdHoareTripleChecker+Valid, 6938 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:37:16,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3787 Valid, 6938 Invalid, 742 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-22 01:37:16,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2022-11-22 01:37:16,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 2005. [2022-11-22 01:37:16,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2005 states, 1941 states have (on average 1.919629057187017) internal successors, (3726), 1945 states have internal predecessors, (3726), 50 states have call successors, (50), 13 states have call predecessors, (50), 12 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2022-11-22 01:37:16,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 3824 transitions. [2022-11-22 01:37:16,428 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 3824 transitions. Word has length 68 [2022-11-22 01:37:16,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:37:16,429 INFO L495 AbstractCegarLoop]: Abstraction has 2005 states and 3824 transitions. [2022-11-22 01:37:16,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 01:37:16,430 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 3824 transitions. [2022-11-22 01:37:16,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-22 01:37:16,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:37:16,438 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:37:16,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:37:16,439 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:37:16,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:37:16,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1923000802, now seen corresponding path program 1 times [2022-11-22 01:37:16,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:37:16,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535980981] [2022-11-22 01:37:16,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:37:16,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:37:16,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:37:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 01:37:16,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:37:16,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535980981] [2022-11-22 01:37:16,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535980981] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:37:16,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095027973] [2022-11-22 01:37:16,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:37:16,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:37:16,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:37:16,826 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:37:16,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:37:17,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:37:17,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 01:37:17,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:37:17,228 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-22 01:37:17,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:37:17,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095027973] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:37:17,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:37:17,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 01:37:17,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135722916] [2022-11-22 01:37:17,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:37:17,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:37:17,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:37:17,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:37:17,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:37:17,239 INFO L87 Difference]: Start difference. First operand 2005 states and 3824 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 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 01:37:17,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:37:17,837 INFO L93 Difference]: Finished difference Result 2716 states and 4939 transitions. [2022-11-22 01:37:17,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:37:17,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 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 137 [2022-11-22 01:37:17,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:37:17,857 INFO L225 Difference]: With dead ends: 2716 [2022-11-22 01:37:17,857 INFO L226 Difference]: Without dead ends: 2357 [2022-11-22 01:37:17,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 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 01:37:17,861 INFO L413 NwaCegarLoop]: 3359 mSDtfsCounter, 3515 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3515 SdHoareTripleChecker+Valid, 3592 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:37:17,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3515 Valid, 3592 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 01:37:17,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2022-11-22 01:37:17,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 2351. [2022-11-22 01:37:17,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2351 states, 2233 states have (on average 1.8669950738916257) internal successors, (4169), 2238 states have internal predecessors, (4169), 92 states have call successors, (92), 25 states have call predecessors, (92), 24 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-22 01:37:17,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2351 states to 2351 states and 4351 transitions. [2022-11-22 01:37:17,962 INFO L78 Accepts]: Start accepts. Automaton has 2351 states and 4351 transitions. Word has length 137 [2022-11-22 01:37:17,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:37:17,963 INFO L495 AbstractCegarLoop]: Abstraction has 2351 states and 4351 transitions. [2022-11-22 01:37:17,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 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 01:37:17,963 INFO L276 IsEmpty]: Start isEmpty. Operand 2351 states and 4351 transitions. [2022-11-22 01:37:17,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-22 01:37:17,975 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:37:17,976 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:37:17,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 01:37:18,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:37:18,184 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:37:18,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:37:18,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1894114562, now seen corresponding path program 1 times [2022-11-22 01:37:18,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:37:18,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544548681] [2022-11-22 01:37:18,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:37:18,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:37:18,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:37:18,471 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 01:37:18,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:37:18,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544548681] [2022-11-22 01:37:18,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544548681] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:37:18,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285094212] [2022-11-22 01:37:18,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:37:18,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:37:18,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:37:18,483 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:37:18,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:37:18,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:37:18,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 01:37:18,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:37:18,824 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-22 01:37:18,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:37:18,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285094212] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:37:18,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:37:18,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 01:37:18,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408536725] [2022-11-22 01:37:18,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:37:18,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:37:18,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:37:18,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:37:18,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:37:18,827 INFO L87 Difference]: Start difference. First operand 2351 states and 4351 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 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 01:37:19,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:37:19,485 INFO L93 Difference]: Finished difference Result 3748 states and 6538 transitions. [2022-11-22 01:37:19,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:37:19,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 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 137 [2022-11-22 01:37:19,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:37:19,502 INFO L225 Difference]: With dead ends: 3748 [2022-11-22 01:37:19,502 INFO L226 Difference]: Without dead ends: 3043 [2022-11-22 01:37:19,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 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 01:37:19,511 INFO L413 NwaCegarLoop]: 3358 mSDtfsCounter, 3527 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3527 SdHoareTripleChecker+Valid, 3591 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:37:19,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3527 Valid, 3591 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 01:37:19,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3043 states. [2022-11-22 01:37:19,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3043 to 3035. [2022-11-22 01:37:19,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3035 states, 2811 states have (on average 1.7940234791889007) internal successors, (5043), 2818 states have internal predecessors, (5043), 174 states have call successors, (174), 49 states have call predecessors, (174), 48 states have return successors, (172), 168 states have call predecessors, (172), 172 states have call successors, (172) [2022-11-22 01:37:19,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3035 states to 3035 states and 5389 transitions. [2022-11-22 01:37:19,639 INFO L78 Accepts]: Start accepts. Automaton has 3035 states and 5389 transitions. Word has length 137 [2022-11-22 01:37:19,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:37:19,639 INFO L495 AbstractCegarLoop]: Abstraction has 3035 states and 5389 transitions. [2022-11-22 01:37:19,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 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 01:37:19,640 INFO L276 IsEmpty]: Start isEmpty. Operand 3035 states and 5389 transitions. [2022-11-22 01:37:19,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-22 01:37:19,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:37:19,649 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:37:19,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 01:37:19,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:37:19,862 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:37:19,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:37:19,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1066233890, now seen corresponding path program 1 times [2022-11-22 01:37:19,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:37:19,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609249248] [2022-11-22 01:37:19,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:37:19,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:37:19,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:37:20,046 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 01:37:20,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:37:20,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609249248] [2022-11-22 01:37:20,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609249248] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:37:20,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104860579] [2022-11-22 01:37:20,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:37:20,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:37:20,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:37:20,049 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:37:20,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 01:37:20,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:37:20,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 01:37:20,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:37:20,355 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-22 01:37:20,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:37:20,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104860579] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:37:20,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:37:20,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 01:37:20,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075303553] [2022-11-22 01:37:20,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:37:20,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:37:20,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:37:20,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:37:20,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:37:20,359 INFO L87 Difference]: Start difference. First operand 3035 states and 5389 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 01:37:21,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:37:21,088 INFO L93 Difference]: Finished difference Result 5788 states and 9686 transitions. [2022-11-22 01:37:21,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:37:21,089 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 137 [2022-11-22 01:37:21,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:37:21,109 INFO L225 Difference]: With dead ends: 5788 [2022-11-22 01:37:21,109 INFO L226 Difference]: Without dead ends: 4399 [2022-11-22 01:37:21,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 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 01:37:21,119 INFO L413 NwaCegarLoop]: 3357 mSDtfsCounter, 3536 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3536 SdHoareTripleChecker+Valid, 3590 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:37:21,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3536 Valid, 3590 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 01:37:21,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4399 states. [2022-11-22 01:37:21,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4399 to 4387. [2022-11-22 01:37:21,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4387 states, 3955 states have (on average 1.710998735777497) internal successors, (6767), 3966 states have internal predecessors, (6767), 334 states have call successors, (334), 97 states have call predecessors, (334), 96 states have return successors, (332), 324 states have call predecessors, (332), 332 states have call successors, (332) [2022-11-22 01:37:21,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4387 states to 4387 states and 7433 transitions. [2022-11-22 01:37:21,321 INFO L78 Accepts]: Start accepts. Automaton has 4387 states and 7433 transitions. Word has length 137 [2022-11-22 01:37:21,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:37:21,322 INFO L495 AbstractCegarLoop]: Abstraction has 4387 states and 7433 transitions. [2022-11-22 01:37:21,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 01:37:21,322 INFO L276 IsEmpty]: Start isEmpty. Operand 4387 states and 7433 transitions. [2022-11-22 01:37:21,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-22 01:37:21,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:37:21,332 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:37:21,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 01:37:21,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:37:21,544 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:37:21,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:37:21,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1717594370, now seen corresponding path program 1 times [2022-11-22 01:37:21,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:37:21,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019119526] [2022-11-22 01:37:21,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:37:21,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:37:21,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:37:21,757 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 01:37:21,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:37:21,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019119526] [2022-11-22 01:37:21,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019119526] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:37:21,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328531773] [2022-11-22 01:37:21,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:37:21,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:37:21,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:37:21,759 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:37:21,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 01:37:22,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:37:22,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 01:37:22,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:37:22,082 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-22 01:37:22,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:37:22,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328531773] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:37:22,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:37:22,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 01:37:22,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792360947] [2022-11-22 01:37:22,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:37:22,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:37:22,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:37:22,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:37:22,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:37:22,085 INFO L87 Difference]: Start difference. First operand 4387 states and 7433 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 01:37:22,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:37:22,781 INFO L93 Difference]: Finished difference Result 9820 states and 15882 transitions. [2022-11-22 01:37:22,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:37:22,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 137 [2022-11-22 01:37:22,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:37:22,821 INFO L225 Difference]: With dead ends: 9820 [2022-11-22 01:37:22,822 INFO L226 Difference]: Without dead ends: 7079 [2022-11-22 01:37:22,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 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 01:37:22,836 INFO L413 NwaCegarLoop]: 3318 mSDtfsCounter, 3533 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3533 SdHoareTripleChecker+Valid, 3551 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:37:22,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3533 Valid, 3551 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 01:37:22,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7079 states. [2022-11-22 01:37:23,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7079 to 7059. [2022-11-22 01:37:23,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7059 states, 6219 states have (on average 1.6348287506029908) internal successors, (10167), 6238 states have internal predecessors, (10167), 646 states have call successors, (646), 193 states have call predecessors, (646), 192 states have return successors, (644), 628 states have call predecessors, (644), 644 states have call successors, (644) [2022-11-22 01:37:23,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7059 states to 7059 states and 11457 transitions. [2022-11-22 01:37:23,158 INFO L78 Accepts]: Start accepts. Automaton has 7059 states and 11457 transitions. Word has length 137 [2022-11-22 01:37:23,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:37:23,160 INFO L495 AbstractCegarLoop]: Abstraction has 7059 states and 11457 transitions. [2022-11-22 01:37:23,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 01:37:23,162 INFO L276 IsEmpty]: Start isEmpty. Operand 7059 states and 11457 transitions. [2022-11-22 01:37:23,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-22 01:37:23,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:37:23,174 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:37:23,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 01:37:23,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:37:23,381 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:37:23,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:37:23,382 INFO L85 PathProgramCache]: Analyzing trace with hash 88400862, now seen corresponding path program 1 times [2022-11-22 01:37:23,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:37:23,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721929901] [2022-11-22 01:37:23,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:37:23,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:37:23,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:37:23,560 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 01:37:23,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:37:23,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721929901] [2022-11-22 01:37:23,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721929901] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:37:23,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076567112] [2022-11-22 01:37:23,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:37:23,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:37:23,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:37:23,562 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:37:23,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 01:37:24,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:37:24,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 01:37:24,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:37:24,113 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:37:24,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:37:24,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076567112] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:37:24,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:37:24,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 01:37:24,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124488335] [2022-11-22 01:37:24,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:37:24,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:37:24,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:37:24,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:37:24,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:37:24,116 INFO L87 Difference]: Start difference. First operand 7059 states and 11457 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 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 01:37:25,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:37:25,165 INFO L93 Difference]: Finished difference Result 17788 states and 28074 transitions. [2022-11-22 01:37:25,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:37:25,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 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 137 [2022-11-22 01:37:25,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:37:25,248 INFO L225 Difference]: With dead ends: 17788 [2022-11-22 01:37:25,248 INFO L226 Difference]: Without dead ends: 12375 [2022-11-22 01:37:25,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 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 01:37:25,276 INFO L413 NwaCegarLoop]: 3318 mSDtfsCounter, 3506 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3506 SdHoareTripleChecker+Valid, 3551 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:37:25,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3506 Valid, 3551 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 01:37:25,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12375 states. [2022-11-22 01:37:25,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12375 to 12339. [2022-11-22 01:37:25,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12339 states, 10699 states have (on average 1.5768763435835125) internal successors, (16871), 10734 states have internal predecessors, (16871), 1254 states have call successors, (1254), 385 states have call predecessors, (1254), 384 states have return successors, (1252), 1220 states have call predecessors, (1252), 1252 states have call successors, (1252) [2022-11-22 01:37:26,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12339 states to 12339 states and 19377 transitions. [2022-11-22 01:37:26,061 INFO L78 Accepts]: Start accepts. Automaton has 12339 states and 19377 transitions. Word has length 137 [2022-11-22 01:37:26,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:37:26,062 INFO L495 AbstractCegarLoop]: Abstraction has 12339 states and 19377 transitions. [2022-11-22 01:37:26,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 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 01:37:26,062 INFO L276 IsEmpty]: Start isEmpty. Operand 12339 states and 19377 transitions. [2022-11-22 01:37:26,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-22 01:37:26,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:37:26,087 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:37:26,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 01:37:26,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-22 01:37:26,295 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:37:26,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:37:26,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1525603586, now seen corresponding path program 1 times [2022-11-22 01:37:26,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:37:26,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83465739] [2022-11-22 01:37:26,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:37:26,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:37:26,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:37:26,609 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 01:37:26,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:37:26,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83465739] [2022-11-22 01:37:26,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83465739] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:37:26,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309087345] [2022-11-22 01:37:26,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:37:26,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:37:26,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:37:26,611 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:37:26,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 01:37:26,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:37:26,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 01:37:26,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:37:26,957 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 01:37:26,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:37:26,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309087345] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:37:26,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:37:26,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 01:37:26,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873921762] [2022-11-22 01:37:26,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:37:26,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:37:26,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:37:26,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:37:26,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:37:26,960 INFO L87 Difference]: Start difference. First operand 12339 states and 19377 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 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 01:37:28,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:37:28,123 INFO L93 Difference]: Finished difference Result 33532 states and 52058 transitions. [2022-11-22 01:37:28,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:37:28,123 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 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 137 [2022-11-22 01:37:28,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:37:28,227 INFO L225 Difference]: With dead ends: 33532 [2022-11-22 01:37:28,228 INFO L226 Difference]: Without dead ends: 22839 [2022-11-22 01:37:28,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 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 01:37:28,274 INFO L413 NwaCegarLoop]: 3318 mSDtfsCounter, 3509 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3509 SdHoareTripleChecker+Valid, 3551 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:37:28,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3509 Valid, 3551 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:37:28,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22839 states. [2022-11-22 01:37:29,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22839 to 22771. [2022-11-22 01:37:29,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22771 states, 19563 states have (on average 1.537954301487502) internal successors, (30087), 19630 states have internal predecessors, (30087), 2438 states have call successors, (2438), 769 states have call predecessors, (2438), 768 states have return successors, (2436), 2372 states have call predecessors, (2436), 2436 states have call successors, (2436) [2022-11-22 01:37:29,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22771 states to 22771 states and 34961 transitions. [2022-11-22 01:37:29,491 INFO L78 Accepts]: Start accepts. Automaton has 22771 states and 34961 transitions. Word has length 137 [2022-11-22 01:37:29,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:37:29,491 INFO L495 AbstractCegarLoop]: Abstraction has 22771 states and 34961 transitions. [2022-11-22 01:37:29,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 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 01:37:29,496 INFO L276 IsEmpty]: Start isEmpty. Operand 22771 states and 34961 transitions. [2022-11-22 01:37:29,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-22 01:37:29,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:37:29,535 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:37:29,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 01:37:29,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:37:29,743 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:37:29,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:37:29,744 INFO L85 PathProgramCache]: Analyzing trace with hash 2121732062, now seen corresponding path program 1 times [2022-11-22 01:37:29,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:37:29,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036429864] [2022-11-22 01:37:29,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:37:29,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:37:29,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:37:30,047 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 01:37:30,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:37:30,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036429864] [2022-11-22 01:37:30,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036429864] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:37:30,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121627942] [2022-11-22 01:37:30,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:37:30,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:37:30,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:37:30,050 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:37:30,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 01:37:30,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:37:30,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 01:37:30,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:37:30,390 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-22 01:37:30,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:37:30,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121627942] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:37:30,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:37:30,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 01:37:30,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499872179] [2022-11-22 01:37:30,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:37:30,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:37:30,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:37:30,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:37:30,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:37:30,393 INFO L87 Difference]: Start difference. First operand 22771 states and 34961 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 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 01:37:32,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:37:32,613 INFO L93 Difference]: Finished difference Result 64636 states and 99226 transitions. [2022-11-22 01:37:32,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:37:32,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 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 137 [2022-11-22 01:37:32,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:37:32,847 INFO L225 Difference]: With dead ends: 64636 [2022-11-22 01:37:32,847 INFO L226 Difference]: Without dead ends: 43511 [2022-11-22 01:37:32,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 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 01:37:32,940 INFO L413 NwaCegarLoop]: 3318 mSDtfsCounter, 3521 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3521 SdHoareTripleChecker+Valid, 3551 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:37:32,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3521 Valid, 3551 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 01:37:32,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43511 states. [2022-11-22 01:37:35,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43511 to 43379. [2022-11-22 01:37:35,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43379 states, 37099 states have (on average 1.5131135610124262) internal successors, (56135), 37230 states have internal predecessors, (56135), 4742 states have call successors, (4742), 1537 states have call predecessors, (4742), 1536 states have return successors, (4740), 4612 states have call predecessors, (4740), 4740 states have call successors, (4740) [2022-11-22 01:37:35,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43379 states to 43379 states and 65617 transitions. [2022-11-22 01:37:35,301 INFO L78 Accepts]: Start accepts. Automaton has 43379 states and 65617 transitions. Word has length 137 [2022-11-22 01:37:35,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:37:35,302 INFO L495 AbstractCegarLoop]: Abstraction has 43379 states and 65617 transitions. [2022-11-22 01:37:35,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 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 01:37:35,302 INFO L276 IsEmpty]: Start isEmpty. Operand 43379 states and 65617 transitions. [2022-11-22 01:37:35,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-22 01:37:35,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:37:35,374 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:37:35,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 01:37:35,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:37:35,581 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:37:35,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:37:35,581 INFO L85 PathProgramCache]: Analyzing trace with hash -452940610, now seen corresponding path program 1 times [2022-11-22 01:37:35,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:37:35,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608382811] [2022-11-22 01:37:35,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:37:35,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:37:35,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:37:36,440 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-22 01:37:36,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:37:36,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608382811] [2022-11-22 01:37:36,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608382811] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:37:36,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:37:36,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 01:37:36,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635553175] [2022-11-22 01:37:36,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:37:36,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:37:36,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:37:36,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:37:36,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:37:36,445 INFO L87 Difference]: Start difference. First operand 43379 states and 65617 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 01:37:42,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:37:42,807 INFO L93 Difference]: Finished difference Result 147579 states and 220888 transitions. [2022-11-22 01:37:42,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 01:37:42,808 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 137 [2022-11-22 01:37:42,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:37:43,398 INFO L225 Difference]: With dead ends: 147579 [2022-11-22 01:37:43,399 INFO L226 Difference]: Without dead ends: 105847 [2022-11-22 01:37:43,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-22 01:37:43,524 INFO L413 NwaCegarLoop]: 3318 mSDtfsCounter, 4355 mSDsluCounter, 9773 mSDsCounter, 0 mSdLazyCounter, 1226 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4376 SdHoareTripleChecker+Valid, 13091 SdHoareTripleChecker+Invalid, 1379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:37:43,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4376 Valid, 13091 Invalid, 1379 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [153 Valid, 1226 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-22 01:37:43,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105847 states. [2022-11-22 01:37:48,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105847 to 83571. [2022-11-22 01:37:48,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83571 states, 71275 states have (on average 1.4969484391441599) internal successors, (106695), 71534 states have internal predecessors, (106695), 9222 states have call successors, (9222), 3073 states have call predecessors, (9222), 3072 states have return successors, (9220), 8964 states have call predecessors, (9220), 9220 states have call successors, (9220) [2022-11-22 01:37:48,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83571 states to 83571 states and 125137 transitions. [2022-11-22 01:37:48,684 INFO L78 Accepts]: Start accepts. Automaton has 83571 states and 125137 transitions. Word has length 137 [2022-11-22 01:37:48,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:37:48,686 INFO L495 AbstractCegarLoop]: Abstraction has 83571 states and 125137 transitions. [2022-11-22 01:37:48,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 01:37:48,687 INFO L276 IsEmpty]: Start isEmpty. Operand 83571 states and 125137 transitions. [2022-11-22 01:37:48,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-22 01:37:48,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:37:48,817 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:37:48,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 01:37:48,817 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:37:48,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:37:48,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1622800610, now seen corresponding path program 1 times [2022-11-22 01:37:48,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:37:48,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999752348] [2022-11-22 01:37:48,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:37:48,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:37:48,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:37:49,351 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-22 01:37:49,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:37:49,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999752348] [2022-11-22 01:37:49,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999752348] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:37:49,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151754179] [2022-11-22 01:37:49,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:37:49,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:37:49,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:37:49,355 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:37:49,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bd7993e-a093-415e-abd0-2e88cb584967/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 01:37:50,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:37:50,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 01:37:50,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:37:50,077 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-22 01:37:50,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:37:50,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151754179] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:37:50,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:37:50,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-22 01:37:50,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743052998] [2022-11-22 01:37:50,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:37:50,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:37:50,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:37:50,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:37:50,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:37:50,079 INFO L87 Difference]: Start difference. First operand 83571 states and 125137 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-22 01:37:54,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:37:54,582 INFO L93 Difference]: Finished difference Result 147191 states and 223572 transitions. [2022-11-22 01:37:54,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:37:54,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 159 [2022-11-22 01:37:54,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:37:55,251 INFO L225 Difference]: With dead ends: 147191 [2022-11-22 01:37:55,252 INFO L226 Difference]: Without dead ends: 105203 [2022-11-22 01:37:55,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:37:55,377 INFO L413 NwaCegarLoop]: 3428 mSDtfsCounter, 125 mSDsluCounter, 3310 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 6738 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:37:55,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 6738 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 01:37:55,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105203 states.