./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.13.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.13.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0dcd4461cca64e9ab41b6ad7ff4c6eaa4177bddcca1c612fa1571b77ac664a95 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 06:29:26,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:29:26,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:29:26,098 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:29:26,098 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:29:26,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:29:26,100 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:29:26,102 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:29:26,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:29:26,105 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:29:26,106 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:29:26,107 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:29:26,107 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:29:26,108 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:29:26,108 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:29:26,109 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:29:26,109 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:29:26,110 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:29:26,111 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:29:26,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:29:26,113 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:29:26,114 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:29:26,114 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:29:26,115 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:29:26,117 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:29:26,117 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:29:26,117 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:29:26,118 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:29:26,118 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:29:26,119 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:29:26,119 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:29:26,120 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:29:26,120 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:29:26,121 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:29:26,122 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:29:26,122 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:29:26,123 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:29:26,123 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:29:26,123 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:29:26,124 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:29:26,124 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:29:26,125 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 06:29:26,138 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:29:26,139 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:29:26,139 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:29:26,139 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:29:26,139 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:29:26,140 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:29:26,140 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:29:26,140 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:29:26,140 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:29:26,140 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:29:26,140 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:29:26,140 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:29:26,141 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:29:26,141 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:29:26,141 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:29:26,141 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:29:26,141 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:29:26,141 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:29:26,142 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:29:26,142 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:29:26,142 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:29:26,142 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:29:26,142 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:29:26,143 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 06:29:26,143 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:29:26,143 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 06:29:26,143 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:29:26,143 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 06:29:26,143 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:29:26,143 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 06:29:26,144 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:29:26,144 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:29:26,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:29:26,144 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:29:26,144 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:29:26,145 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:29:26,145 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 06:29:26,145 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:29:26,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:29:26,145 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 06:29:26,145 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:29:26,145 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_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0dcd4461cca64e9ab41b6ad7ff4c6eaa4177bddcca1c612fa1571b77ac664a95 [2022-12-14 06:29:26,326 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:29:26,346 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:29:26,349 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:29:26,350 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:29:26,350 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:29:26,351 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/systemc/token_ring.13.cil-2.c [2022-12-14 06:29:28,928 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:29:29,122 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:29:29,123 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/sv-benchmarks/c/systemc/token_ring.13.cil-2.c [2022-12-14 06:29:29,135 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/data/2ed86f465/c585c8e712aa47d7b6cea702cf7b4b87/FLAGa58db7518 [2022-12-14 06:29:29,149 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/data/2ed86f465/c585c8e712aa47d7b6cea702cf7b4b87 [2022-12-14 06:29:29,152 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:29:29,153 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:29:29,154 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:29:29,155 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:29:29,158 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:29:29,159 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:29:29" (1/1) ... [2022-12-14 06:29:29,160 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38794763 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:29:29, skipping insertion in model container [2022-12-14 06:29:29,160 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:29:29" (1/1) ... [2022-12-14 06:29:29,167 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:29:29,208 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:29:29,317 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_5927a16c-5723-47f8-8a9a-6c49293c084a/sv-benchmarks/c/systemc/token_ring.13.cil-2.c[671,684] [2022-12-14 06:29:29,409 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:29:29,418 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:29:29,426 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_5927a16c-5723-47f8-8a9a-6c49293c084a/sv-benchmarks/c/systemc/token_ring.13.cil-2.c[671,684] [2022-12-14 06:29:29,467 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:29:29,481 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:29:29,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:29:29 WrapperNode [2022-12-14 06:29:29,482 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:29:29,482 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:29:29,483 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:29:29,483 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:29:29,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:29:29" (1/1) ... [2022-12-14 06:29:29,496 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:29:29" (1/1) ... [2022-12-14 06:29:29,525 INFO L138 Inliner]: procedures = 54, calls = 70, calls flagged for inlining = 38, calls inlined = 38, statements flattened = 911 [2022-12-14 06:29:29,525 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:29:29,526 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:29:29,526 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:29:29,526 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:29:29,533 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:29:29" (1/1) ... [2022-12-14 06:29:29,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:29:29" (1/1) ... [2022-12-14 06:29:29,536 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:29:29" (1/1) ... [2022-12-14 06:29:29,536 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:29:29" (1/1) ... [2022-12-14 06:29:29,559 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:29:29" (1/1) ... [2022-12-14 06:29:29,580 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:29:29" (1/1) ... [2022-12-14 06:29:29,581 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:29:29" (1/1) ... [2022-12-14 06:29:29,584 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:29:29" (1/1) ... [2022-12-14 06:29:29,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:29:29,588 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:29:29,588 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:29:29,588 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:29:29,589 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:29:29" (1/1) ... [2022-12-14 06:29:29,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:29:29,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:29:29,614 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:29:29,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:29:29,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:29:29,645 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 06:29:29,645 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 06:29:29,645 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 06:29:29,645 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 06:29:29,645 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 06:29:29,646 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 06:29:29,646 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 06:29:29,646 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 06:29:29,646 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 06:29:29,646 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 06:29:29,646 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 06:29:29,646 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 06:29:29,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:29:29,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:29:29,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:29:29,731 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:29:29,733 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:29:30,328 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:29:30,742 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:29:30,742 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-12-14 06:29:30,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:29:30 BoogieIcfgContainer [2022-12-14 06:29:30,745 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:29:30,747 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:29:30,747 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:29:30,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:29:30,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:29:29" (1/3) ... [2022-12-14 06:29:30,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36fb70f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:29:30, skipping insertion in model container [2022-12-14 06:29:30,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:29:29" (2/3) ... [2022-12-14 06:29:30,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36fb70f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:29:30, skipping insertion in model container [2022-12-14 06:29:30,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:29:30" (3/3) ... [2022-12-14 06:29:30,752 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.13.cil-2.c [2022-12-14 06:29:30,767 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:29:30,767 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 06:29:30,818 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:29:30,823 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;@5e0ba5ae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:29:30,823 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 06:29:30,827 INFO L276 IsEmpty]: Start isEmpty. Operand has 199 states, 164 states have (on average 1.5609756097560976) internal successors, (256), 166 states have internal predecessors, (256), 27 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-12-14 06:29:30,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-14 06:29:30,839 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:29:30,840 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, 1] [2022-12-14 06:29:30,840 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:29:30,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:29:30,845 INFO L85 PathProgramCache]: Analyzing trace with hash 452120414, now seen corresponding path program 1 times [2022-12-14 06:29:30,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:29:30,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485710755] [2022-12-14 06:29:30,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:29:30,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:29:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:29:31,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:29:31,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:29:31,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485710755] [2022-12-14 06:29:31,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485710755] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:29:31,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:29:31,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:29:31,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178471029] [2022-12-14 06:29:31,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:29:31,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:29:31,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:29:31,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:29:31,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:29:31,179 INFO L87 Difference]: Start difference. First operand has 199 states, 164 states have (on average 1.5609756097560976) internal successors, (256), 166 states have internal predecessors, (256), 27 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 06:29:31,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:29:31,639 INFO L93 Difference]: Finished difference Result 581 states and 923 transitions. [2022-12-14 06:29:31,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:29:31,642 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2022-12-14 06:29:31,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:29:31,649 INFO L225 Difference]: With dead ends: 581 [2022-12-14 06:29:31,650 INFO L226 Difference]: Without dead ends: 383 [2022-12-14 06:29:31,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:29:31,655 INFO L413 NwaCegarLoop]: 484 mSDtfsCounter, 545 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:29:31,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 866 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 06:29:31,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-12-14 06:29:31,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 382. [2022-12-14 06:29:31,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 319 states have (on average 1.5297805642633229) internal successors, (488), 321 states have internal predecessors, (488), 50 states have call successors, (50), 12 states have call predecessors, (50), 12 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2022-12-14 06:29:31,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 588 transitions. [2022-12-14 06:29:31,707 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 588 transitions. Word has length 69 [2022-12-14 06:29:31,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:29:31,707 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 588 transitions. [2022-12-14 06:29:31,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 06:29:31,708 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 588 transitions. [2022-12-14 06:29:31,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-12-14 06:29:31,712 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:29:31,712 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:29:31,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 06:29:31,712 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:29:31,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:29:31,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1679948641, now seen corresponding path program 1 times [2022-12-14 06:29:31,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:29:31,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982706848] [2022-12-14 06:29:31,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:29:31,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:29:31,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:29:31,876 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 06:29:31,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:29:31,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982706848] [2022-12-14 06:29:31,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982706848] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:29:31,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909493124] [2022-12-14 06:29:31,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:29:31,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:29:31,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:29:31,879 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:29:31,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:29:32,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:29:32,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:29:32,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:29:32,139 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 06:29:32,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:29:32,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909493124] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:29:32,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:29:32,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-12-14 06:29:32,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682526235] [2022-12-14 06:29:32,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:29:32,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:29:32,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:29:32,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:29:32,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:29:32,143 INFO L87 Difference]: Start difference. First operand 382 states and 588 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:29:32,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:29:32,302 INFO L93 Difference]: Finished difference Result 1129 states and 1769 transitions. [2022-12-14 06:29:32,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:29:32,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 142 [2022-12-14 06:29:32,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:29:32,308 INFO L225 Difference]: With dead ends: 1129 [2022-12-14 06:29:32,308 INFO L226 Difference]: Without dead ends: 752 [2022-12-14 06:29:32,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:29:32,311 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 277 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:29:32,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 546 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:29:32,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-12-14 06:29:32,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 748. [2022-12-14 06:29:32,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 629 states have (on average 1.5278219395866455) internal successors, (961), 632 states have internal predecessors, (961), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-12-14 06:29:32,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1149 transitions. [2022-12-14 06:29:32,347 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1149 transitions. Word has length 142 [2022-12-14 06:29:32,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:29:32,348 INFO L495 AbstractCegarLoop]: Abstraction has 748 states and 1149 transitions. [2022-12-14 06:29:32,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:29:32,348 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1149 transitions. [2022-12-14 06:29:32,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-12-14 06:29:32,352 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:29:32,352 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:29:32,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 06:29:32,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:29:32,554 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:29:32,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:29:32,555 INFO L85 PathProgramCache]: Analyzing trace with hash 57138209, now seen corresponding path program 1 times [2022-12-14 06:29:32,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:29:32,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570651977] [2022-12-14 06:29:32,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:29:32,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:29:32,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:29:32,807 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 06:29:32,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:29:32,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570651977] [2022-12-14 06:29:32,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570651977] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:29:32,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691236745] [2022-12-14 06:29:32,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:29:32,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:29:32,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:29:32,809 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:29:32,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 06:29:32,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:29:33,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:29:33,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:29:33,064 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 06:29:33,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:29:33,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691236745] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:29:33,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:29:33,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-12-14 06:29:33,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012511558] [2022-12-14 06:29:33,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:29:33,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:29:33,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:29:33,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:29:33,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:29:33,067 INFO L87 Difference]: Start difference. First operand 748 states and 1149 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:29:33,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:29:33,239 INFO L93 Difference]: Finished difference Result 2221 states and 3472 transitions. [2022-12-14 06:29:33,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:29:33,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 142 [2022-12-14 06:29:33,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:29:33,248 INFO L225 Difference]: With dead ends: 2221 [2022-12-14 06:29:33,249 INFO L226 Difference]: Without dead ends: 1478 [2022-12-14 06:29:33,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:29:33,253 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 250 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:29:33,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 513 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:29:33,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2022-12-14 06:29:33,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1472. [2022-12-14 06:29:33,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1243 states have (on average 1.5245374094931616) internal successors, (1895), 1248 states have internal predecessors, (1895), 180 states have call successors, (180), 48 states have call predecessors, (180), 48 states have return successors, (180), 176 states have call predecessors, (180), 180 states have call successors, (180) [2022-12-14 06:29:33,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 2255 transitions. [2022-12-14 06:29:33,339 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 2255 transitions. Word has length 142 [2022-12-14 06:29:33,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:29:33,339 INFO L495 AbstractCegarLoop]: Abstraction has 1472 states and 2255 transitions. [2022-12-14 06:29:33,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:29:33,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 2255 transitions. [2022-12-14 06:29:33,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-12-14 06:29:33,342 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:29:33,342 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:29:33,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 06:29:33,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:29:33,544 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:29:33,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:29:33,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1352081953, now seen corresponding path program 1 times [2022-12-14 06:29:33,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:29:33,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700690880] [2022-12-14 06:29:33,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:29:33,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:29:33,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:29:33,718 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 06:29:33,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:29:33,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700690880] [2022-12-14 06:29:33,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700690880] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:29:33,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324619708] [2022-12-14 06:29:33,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:29:33,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:29:33,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:29:33,720 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:29:33,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 06:29:33,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:29:33,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:29:33,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:29:33,951 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 06:29:33,951 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:29:33,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324619708] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:29:33,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:29:33,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-12-14 06:29:33,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765868347] [2022-12-14 06:29:33,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:29:33,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:29:33,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:29:33,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:29:33,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:29:33,953 INFO L87 Difference]: Start difference. First operand 1472 states and 2255 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:29:34,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:29:34,145 INFO L93 Difference]: Finished difference Result 4381 states and 6828 transitions. [2022-12-14 06:29:34,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:29:34,145 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 142 [2022-12-14 06:29:34,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:29:34,155 INFO L225 Difference]: With dead ends: 4381 [2022-12-14 06:29:34,155 INFO L226 Difference]: Without dead ends: 2914 [2022-12-14 06:29:34,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:29:34,160 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 253 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:29:34,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 513 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:29:34,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2914 states. [2022-12-14 06:29:34,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2914 to 2904. [2022-12-14 06:29:34,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2904 states, 2459 states have (on average 1.5205368035786906) internal successors, (3739), 2468 states have internal predecessors, (3739), 348 states have call successors, (348), 96 states have call predecessors, (348), 96 states have return successors, (348), 340 states have call predecessors, (348), 348 states have call successors, (348) [2022-12-14 06:29:34,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2904 states to 2904 states and 4435 transitions. [2022-12-14 06:29:34,282 INFO L78 Accepts]: Start accepts. Automaton has 2904 states and 4435 transitions. Word has length 142 [2022-12-14 06:29:34,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:29:34,282 INFO L495 AbstractCegarLoop]: Abstraction has 2904 states and 4435 transitions. [2022-12-14 06:29:34,283 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:29:34,283 INFO L276 IsEmpty]: Start isEmpty. Operand 2904 states and 4435 transitions. [2022-12-14 06:29:34,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-12-14 06:29:34,287 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:29:34,287 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:29:34,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 06:29:34,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:29:34,488 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:29:34,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:29:34,488 INFO L85 PathProgramCache]: Analyzing trace with hash -124609695, now seen corresponding path program 1 times [2022-12-14 06:29:34,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:29:34,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085520871] [2022-12-14 06:29:34,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:29:34,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:29:34,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:29:34,586 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 06:29:34,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:29:34,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085520871] [2022-12-14 06:29:34,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085520871] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:29:34,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439156355] [2022-12-14 06:29:34,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:29:34,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:29:34,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:29:34,588 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:29:34,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 06:29:34,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:29:34,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:29:34,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:29:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 06:29:34,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:29:34,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439156355] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:29:34,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:29:34,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-12-14 06:29:34,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580330492] [2022-12-14 06:29:34,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:29:34,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:29:34,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:29:34,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:29:34,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:29:34,837 INFO L87 Difference]: Start difference. First operand 2904 states and 4435 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:29:35,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:29:35,074 INFO L93 Difference]: Finished difference Result 8653 states and 13440 transitions. [2022-12-14 06:29:35,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:29:35,074 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 142 [2022-12-14 06:29:35,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:29:35,092 INFO L225 Difference]: With dead ends: 8653 [2022-12-14 06:29:35,092 INFO L226 Difference]: Without dead ends: 5754 [2022-12-14 06:29:35,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:29:35,099 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 259 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:29:35,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 513 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:29:35,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5754 states. [2022-12-14 06:29:35,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5754 to 5736. [2022-12-14 06:29:35,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5736 states, 4867 states have (on average 1.5161290322580645) internal successors, (7379), 4884 states have internal predecessors, (7379), 676 states have call successors, (676), 192 states have call predecessors, (676), 192 states have return successors, (676), 660 states have call predecessors, (676), 676 states have call successors, (676) [2022-12-14 06:29:35,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5736 states to 5736 states and 8731 transitions. [2022-12-14 06:29:35,273 INFO L78 Accepts]: Start accepts. Automaton has 5736 states and 8731 transitions. Word has length 142 [2022-12-14 06:29:35,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:29:35,273 INFO L495 AbstractCegarLoop]: Abstraction has 5736 states and 8731 transitions. [2022-12-14 06:29:35,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:29:35,274 INFO L276 IsEmpty]: Start isEmpty. Operand 5736 states and 8731 transitions. [2022-12-14 06:29:35,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-12-14 06:29:35,281 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:29:35,281 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:29:35,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 06:29:35,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:29:35,481 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:29:35,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:29:35,482 INFO L85 PathProgramCache]: Analyzing trace with hash -710627485, now seen corresponding path program 1 times [2022-12-14 06:29:35,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:29:35,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397681207] [2022-12-14 06:29:35,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:29:35,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:29:35,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:29:35,574 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 06:29:35,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:29:35,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397681207] [2022-12-14 06:29:35,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397681207] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:29:35,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857207835] [2022-12-14 06:29:35,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:29:35,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:29:35,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:29:35,576 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:29:35,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 06:29:35,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:29:35,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:29:35,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:29:35,804 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 06:29:35,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:29:35,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857207835] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:29:35,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:29:35,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-12-14 06:29:35,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693893128] [2022-12-14 06:29:35,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:29:35,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:29:35,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:29:35,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:29:35,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:29:35,807 INFO L87 Difference]: Start difference. First operand 5736 states and 8731 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:29:36,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:29:36,210 INFO L93 Difference]: Finished difference Result 17101 states and 26464 transitions. [2022-12-14 06:29:36,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:29:36,211 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 142 [2022-12-14 06:29:36,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:29:36,255 INFO L225 Difference]: With dead ends: 17101 [2022-12-14 06:29:36,255 INFO L226 Difference]: Without dead ends: 11370 [2022-12-14 06:29:36,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:29:36,269 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 280 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:29:36,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 513 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:29:36,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11370 states. [2022-12-14 06:29:36,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11370 to 11336. [2022-12-14 06:29:36,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11336 states, 9635 states have (on average 1.5114686040477425) internal successors, (14563), 9668 states have internal predecessors, (14563), 1316 states have call successors, (1316), 384 states have call predecessors, (1316), 384 states have return successors, (1316), 1284 states have call predecessors, (1316), 1316 states have call successors, (1316) [2022-12-14 06:29:36,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11336 states to 11336 states and 17195 transitions. [2022-12-14 06:29:36,714 INFO L78 Accepts]: Start accepts. Automaton has 11336 states and 17195 transitions. Word has length 142 [2022-12-14 06:29:36,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:29:36,715 INFO L495 AbstractCegarLoop]: Abstraction has 11336 states and 17195 transitions. [2022-12-14 06:29:36,715 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:29:36,715 INFO L276 IsEmpty]: Start isEmpty. Operand 11336 states and 17195 transitions. [2022-12-14 06:29:36,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-12-14 06:29:36,741 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:29:36,741 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:29:36,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 06:29:36,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:29:36,942 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:29:36,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:29:36,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1217228639, now seen corresponding path program 1 times [2022-12-14 06:29:36,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:29:36,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304930428] [2022-12-14 06:29:36,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:29:36,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:29:36,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:29:37,052 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 06:29:37,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:29:37,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304930428] [2022-12-14 06:29:37,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304930428] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:29:37,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818123583] [2022-12-14 06:29:37,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:29:37,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:29:37,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:29:37,054 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:29:37,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 06:29:37,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:29:37,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 1026 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:29:37,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:29:37,274 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 06:29:37,274 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:29:37,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818123583] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:29:37,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:29:37,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2022-12-14 06:29:37,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224151600] [2022-12-14 06:29:37,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:29:37,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:29:37,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:29:37,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:29:37,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:29:37,277 INFO L87 Difference]: Start difference. First operand 11336 states and 17195 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:29:37,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:29:37,871 INFO L93 Difference]: Finished difference Result 33805 states and 52112 transitions. [2022-12-14 06:29:37,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:29:37,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 142 [2022-12-14 06:29:37,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:29:37,951 INFO L225 Difference]: With dead ends: 33805 [2022-12-14 06:29:37,951 INFO L226 Difference]: Without dead ends: 22474 [2022-12-14 06:29:37,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:29:37,983 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 271 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:29:37,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 513 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:29:38,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22474 states. [2022-12-14 06:29:38,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22474 to 22408. [2022-12-14 06:29:38,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22408 states, 19075 states have (on average 1.5066317169069463) internal successors, (28739), 19140 states have internal predecessors, (28739), 2564 states have call successors, (2564), 768 states have call predecessors, (2564), 768 states have return successors, (2564), 2500 states have call predecessors, (2564), 2564 states have call successors, (2564) [2022-12-14 06:29:38,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22408 states to 22408 states and 33867 transitions. [2022-12-14 06:29:38,853 INFO L78 Accepts]: Start accepts. Automaton has 22408 states and 33867 transitions. Word has length 142 [2022-12-14 06:29:38,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:29:38,853 INFO L495 AbstractCegarLoop]: Abstraction has 22408 states and 33867 transitions. [2022-12-14 06:29:38,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:29:38,854 INFO L276 IsEmpty]: Start isEmpty. Operand 22408 states and 33867 transitions. [2022-12-14 06:29:38,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-12-14 06:29:38,892 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:29:38,892 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:29:38,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 06:29:39,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 06:29:39,093 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:29:39,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:29:39,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1559449181, now seen corresponding path program 1 times [2022-12-14 06:29:39,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:29:39,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162460798] [2022-12-14 06:29:39,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:29:39,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:29:39,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:29:39,165 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 06:29:39,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:29:39,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162460798] [2022-12-14 06:29:39,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162460798] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:29:39,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802419968] [2022-12-14 06:29:39,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:29:39,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:29:39,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:29:39,167 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:29:39,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 06:29:39,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:29:39,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:29:39,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:29:39,417 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 06:29:39,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:29:39,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802419968] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:29:39,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:29:39,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2022-12-14 06:29:39,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749221116] [2022-12-14 06:29:39,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:29:39,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:29:39,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:29:39,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:29:39,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:29:39,419 INFO L87 Difference]: Start difference. First operand 22408 states and 33867 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:29:40,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:29:40,512 INFO L93 Difference]: Finished difference Result 66829 states and 102608 transitions. [2022-12-14 06:29:40,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:29:40,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 142 [2022-12-14 06:29:40,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:29:40,679 INFO L225 Difference]: With dead ends: 66829 [2022-12-14 06:29:40,679 INFO L226 Difference]: Without dead ends: 44426 [2022-12-14 06:29:40,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:29:40,733 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 265 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:29:40,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 513 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:29:40,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44426 states. [2022-12-14 06:29:42,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44426 to 44296. [2022-12-14 06:29:42,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44296 states, 37763 states have (on average 1.5016550591849165) internal successors, (56707), 37892 states have internal predecessors, (56707), 4996 states have call successors, (4996), 1536 states have call predecessors, (4996), 1536 states have return successors, (4996), 4868 states have call predecessors, (4996), 4996 states have call successors, (4996) [2022-12-14 06:29:42,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44296 states to 44296 states and 66699 transitions. [2022-12-14 06:29:42,244 INFO L78 Accepts]: Start accepts. Automaton has 44296 states and 66699 transitions. Word has length 142 [2022-12-14 06:29:42,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:29:42,245 INFO L495 AbstractCegarLoop]: Abstraction has 44296 states and 66699 transitions. [2022-12-14 06:29:42,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:29:42,245 INFO L276 IsEmpty]: Start isEmpty. Operand 44296 states and 66699 transitions. [2022-12-14 06:29:42,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-12-14 06:29:42,320 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:29:42,320 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:29:42,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 06:29:42,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5927a16c-5723-47f8-8a9a-6c49293c084a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:29:42,521 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:29:42,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:29:42,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1359756325, now seen corresponding path program 1 times [2022-12-14 06:29:42,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:29:42,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766098710] [2022-12-14 06:29:42,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:29:42,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:29:42,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:29:43,040 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 06:29:43,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:29:43,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766098710] [2022-12-14 06:29:43,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766098710] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:29:43,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:29:43,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:29:43,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560179328] [2022-12-14 06:29:43,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:29:43,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:29:43,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:29:43,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:29:43,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:29:43,042 INFO L87 Difference]: Start difference. First operand 44296 states and 66699 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:29:46,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:29:46,882 INFO L93 Difference]: Finished difference Result 155660 states and 233998 transitions. [2022-12-14 06:29:46,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 06:29:46,882 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 142 [2022-12-14 06:29:46,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:29:47,315 INFO L225 Difference]: With dead ends: 155660 [2022-12-14 06:29:47,315 INFO L226 Difference]: Without dead ends: 111370 [2022-12-14 06:29:47,425 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 [2022-12-14 06:29:47,425 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 1149 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1171 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:29:47,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1171 Valid, 905 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 06:29:47,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111370 states. [2022-12-14 06:29:50,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111370 to 87048. [2022-12-14 06:29:50,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87048 states, 74243 states have (on average 1.4965316595503952) internal successors, (111107), 74500 states have internal predecessors, (111107), 9732 states have call successors, (9732), 3072 states have call predecessors, (9732), 3072 states have return successors, (9732), 9476 states have call predecessors, (9732), 9732 states have call successors, (9732) [2022-12-14 06:29:50,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87048 states to 87048 states and 130571 transitions. [2022-12-14 06:29:50,791 INFO L78 Accepts]: Start accepts. Automaton has 87048 states and 130571 transitions. Word has length 142 [2022-12-14 06:29:50,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:29:50,792 INFO L495 AbstractCegarLoop]: Abstraction has 87048 states and 130571 transitions. [2022-12-14 06:29:50,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:29:50,792 INFO L276 IsEmpty]: Start isEmpty. Operand 87048 states and 130571 transitions. [2022-12-14 06:29:50,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 06:29:50,862 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:29:50,862 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:29:50,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 06:29:50,863 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:29:50,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:29:50,863 INFO L85 PathProgramCache]: Analyzing trace with hash -700693791, now seen corresponding path program 1 times [2022-12-14 06:29:50,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:29:50,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408560420] [2022-12-14 06:29:50,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:29:50,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:29:50,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:29:51,184 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 06:29:51,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:29:51,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408560420] [2022-12-14 06:29:51,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408560420] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:29:51,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:29:51,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:29:51,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464180859] [2022-12-14 06:29:51,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:29:51,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:29:51,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:29:51,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:29:51,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:29:51,186 INFO L87 Difference]: Start difference. First operand 87048 states and 130571 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:29:57,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:29:57,452 INFO L93 Difference]: Finished difference Result 239116 states and 359053 transitions. [2022-12-14 06:29:57,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 06:29:57,452 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 143 [2022-12-14 06:29:57,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:29:57,883 INFO L225 Difference]: With dead ends: 239116 [2022-12-14 06:29:57,883 INFO L226 Difference]: Without dead ends: 152074 [2022-12-14 06:29:58,027 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 [2022-12-14 06:29:58,027 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 1005 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1011 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:29:58,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1011 Valid, 1018 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 06:29:58,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152074 states. [2022-12-14 06:30:02,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152074 to 129544. [2022-12-14 06:30:02,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129544 states, 110467 states have (on average 1.492454760245141) internal successors, (164867), 110852 states have internal predecessors, (164867), 14468 states have call successors, (14468), 4608 states have call predecessors, (14468), 4608 states have return successors, (14468), 14084 states have call predecessors, (14468), 14468 states have call successors, (14468) [2022-12-14 06:30:02,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129544 states to 129544 states and 193803 transitions. [2022-12-14 06:30:02,976 INFO L78 Accepts]: Start accepts. Automaton has 129544 states and 193803 transitions. Word has length 143 [2022-12-14 06:30:02,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:30:02,976 INFO L495 AbstractCegarLoop]: Abstraction has 129544 states and 193803 transitions. [2022-12-14 06:30:02,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:30:02,977 INFO L276 IsEmpty]: Start isEmpty. Operand 129544 states and 193803 transitions. [2022-12-14 06:30:03,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 06:30:03,101 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:30:03,101 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:30:03,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 06:30:03,101 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:30:03,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:30:03,101 INFO L85 PathProgramCache]: Analyzing trace with hash -425928535, now seen corresponding path program 1 times [2022-12-14 06:30:03,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:30:03,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814123324] [2022-12-14 06:30:03,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:30:03,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:30:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:30:03,407 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 06:30:03,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:30:03,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814123324] [2022-12-14 06:30:03,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814123324] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:30:03,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:30:03,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:30:03,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377253433] [2022-12-14 06:30:03,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:30:03,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:30:03,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:30:03,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:30:03,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:30:03,410 INFO L87 Difference]: Start difference. First operand 129544 states and 193803 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:30:12,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:30:12,767 INFO L93 Difference]: Finished difference Result 353420 states and 529933 transitions. [2022-12-14 06:30:12,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 06:30:12,768 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 144 [2022-12-14 06:30:12,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:30:13,442 INFO L225 Difference]: With dead ends: 353420 [2022-12-14 06:30:13,442 INFO L226 Difference]: Without dead ends: 223882 [2022-12-14 06:30:13,657 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 [2022-12-14 06:30:13,657 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 988 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:30:13,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [994 Valid, 1003 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 06:30:13,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223882 states. [2022-12-14 06:30:21,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223882 to 192776. [2022-12-14 06:30:21,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192776 states, 164355 states have (on average 1.4883088436615861) internal successors, (244611), 164932 states have internal predecessors, (244611), 21508 states have call successors, (21508), 6912 states have call predecessors, (21508), 6912 states have return successors, (21508), 20932 states have call predecessors, (21508), 21508 states have call successors, (21508) [2022-12-14 06:30:22,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192776 states to 192776 states and 287627 transitions. [2022-12-14 06:30:22,479 INFO L78 Accepts]: Start accepts. Automaton has 192776 states and 287627 transitions. Word has length 144 [2022-12-14 06:30:22,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:30:22,480 INFO L495 AbstractCegarLoop]: Abstraction has 192776 states and 287627 transitions. [2022-12-14 06:30:22,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:30:22,480 INFO L276 IsEmpty]: Start isEmpty. Operand 192776 states and 287627 transitions. [2022-12-14 06:30:22,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 06:30:22,628 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:30:22,628 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:30:22,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 06:30:22,629 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:30:22,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:30:22,629 INFO L85 PathProgramCache]: Analyzing trace with hash -2031057315, now seen corresponding path program 1 times [2022-12-14 06:30:22,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:30:22,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627744346] [2022-12-14 06:30:22,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:30:22,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:30:22,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:30:22,912 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 06:30:22,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:30:22,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627744346] [2022-12-14 06:30:22,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627744346] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:30:22,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:30:22,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:30:22,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318757940] [2022-12-14 06:30:22,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:30:22,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:30:22,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:30:22,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:30:22,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:30:22,914 INFO L87 Difference]: Start difference. First operand 192776 states and 287627 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:30:43,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:30:43,951 INFO L93 Difference]: Finished difference Result 655500 states and 979982 transitions. [2022-12-14 06:30:43,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 06:30:43,952 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 145 [2022-12-14 06:30:43,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:30:45,539 INFO L225 Difference]: With dead ends: 655500 [2022-12-14 06:30:45,539 INFO L226 Difference]: Without dead ends: 462730 [2022-12-14 06:30:45,995 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 [2022-12-14 06:30:45,995 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 1128 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1150 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:30:45,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1150 Valid, 720 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:30:46,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462730 states. [2022-12-14 06:31:04,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462730 to 378632. [2022-12-14 06:31:04,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378632 states, 322947 states have (on average 1.4827541361276) internal successors, (478851), 324100 states have internal predecessors, (478851), 41860 states have call successors, (41860), 13824 states have call predecessors, (41860), 13824 states have return successors, (41860), 40708 states have call predecessors, (41860), 41860 states have call successors, (41860) [2022-12-14 06:31:05,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378632 states to 378632 states and 562571 transitions. [2022-12-14 06:31:05,729 INFO L78 Accepts]: Start accepts. Automaton has 378632 states and 562571 transitions. Word has length 145 [2022-12-14 06:31:05,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:31:05,729 INFO L495 AbstractCegarLoop]: Abstraction has 378632 states and 562571 transitions. [2022-12-14 06:31:05,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:31:05,729 INFO L276 IsEmpty]: Start isEmpty. Operand 378632 states and 562571 transitions. [2022-12-14 06:31:06,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 06:31:06,128 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:31:06,128 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:31:06,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 06:31:06,128 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:31:06,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:31:06,129 INFO L85 PathProgramCache]: Analyzing trace with hash -854080211, now seen corresponding path program 1 times [2022-12-14 06:31:06,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:31:06,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433586555] [2022-12-14 06:31:06,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:31:06,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:31:06,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:31:06,469 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 06:31:06,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:31:06,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433586555] [2022-12-14 06:31:06,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433586555] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:31:06,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:31:06,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:31:06,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440749454] [2022-12-14 06:31:06,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:31:06,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:31:06,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:31:06,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:31:06,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:31:06,471 INFO L87 Difference]: Start difference. First operand 378632 states and 562571 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:31:41,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:31:41,184 INFO L93 Difference]: Finished difference Result 1017996 states and 1517773 transitions. [2022-12-14 06:31:41,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 06:31:41,185 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 146 [2022-12-14 06:31:41,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:31:43,362 INFO L225 Difference]: With dead ends: 1017996 [2022-12-14 06:31:43,363 INFO L226 Difference]: Without dead ends: 639370 [2022-12-14 06:31:44,095 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 [2022-12-14 06:31:44,095 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 1002 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:31:44,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1008 Valid, 793 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 06:31:44,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639370 states. [2022-12-14 06:32:16,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639370 to 563336. [2022-12-14 06:32:16,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563336 states, 480387 states have (on average 1.478414278487969) internal successors, (710211), 482116 states have internal predecessors, (710211), 62212 states have call successors, (62212), 20736 states have call predecessors, (62212), 20736 states have return successors, (62212), 60484 states have call predecessors, (62212), 62212 states have call successors, (62212) [2022-12-14 06:32:18,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563336 states to 563336 states and 834635 transitions. [2022-12-14 06:32:18,810 INFO L78 Accepts]: Start accepts. Automaton has 563336 states and 834635 transitions. Word has length 146 [2022-12-14 06:32:18,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:32:18,810 INFO L495 AbstractCegarLoop]: Abstraction has 563336 states and 834635 transitions. [2022-12-14 06:32:18,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:32:18,810 INFO L276 IsEmpty]: Start isEmpty. Operand 563336 states and 834635 transitions. [2022-12-14 06:32:19,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-14 06:32:19,410 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:32:19,411 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:32:19,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 06:32:19,411 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:32:19,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:32:19,411 INFO L85 PathProgramCache]: Analyzing trace with hash -686663207, now seen corresponding path program 1 times [2022-12-14 06:32:19,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:32:19,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289525102] [2022-12-14 06:32:19,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:32:19,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:32:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:32:19,689 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 06:32:19,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:32:19,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289525102] [2022-12-14 06:32:19,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289525102] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:32:19,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:32:19,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:32:19,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389408891] [2022-12-14 06:32:19,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:32:19,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:32:19,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:32:19,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:32:19,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:32:19,691 INFO L87 Difference]: Start difference. First operand 563336 states and 834635 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:33:39,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:33:39,809 INFO L93 Difference]: Finished difference Result 1869708 states and 2780366 transitions. [2022-12-14 06:33:39,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 06:33:39,810 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 147 [2022-12-14 06:33:39,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:33:45,148 INFO L225 Difference]: With dead ends: 1869708 [2022-12-14 06:33:45,148 INFO L226 Difference]: Without dead ends: 1306378 [2022-12-14 06:33:46,727 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 [2022-12-14 06:33:46,728 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 1023 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1045 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:33:46,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1045 Valid, 827 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 06:33:47,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306378 states. [2022-12-14 06:34:56,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306378 to 1105928. [2022-12-14 06:34:57,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105928 states, 943491 states have (on average 1.4725259700410496) internal successors, (1389315), 946948 states have internal predecessors, (1389315), 120964 states have call successors, (120964), 41472 states have call predecessors, (120964), 41472 states have return successors, (120964), 117508 states have call predecessors, (120964), 120964 states have call successors, (120964) [2022-12-14 06:35:03,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105928 states to 1105928 states and 1631243 transitions. [2022-12-14 06:35:03,379 INFO L78 Accepts]: Start accepts. Automaton has 1105928 states and 1631243 transitions. Word has length 147 [2022-12-14 06:35:03,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:35:03,379 INFO L495 AbstractCegarLoop]: Abstraction has 1105928 states and 1631243 transitions. [2022-12-14 06:35:03,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:35:03,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1105928 states and 1631243 transitions. [2022-12-14 06:35:04,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-12-14 06:35:04,525 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:35:04,526 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:35:04,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 06:35:04,526 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:35:04,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:35:04,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1517469263, now seen corresponding path program 1 times [2022-12-14 06:35:04,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:35:04,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701791475] [2022-12-14 06:35:04,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:35:04,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:35:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:35:04,782 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 06:35:04,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:35:04,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701791475] [2022-12-14 06:35:04,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701791475] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:35:04,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:35:04,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:35:04,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695013763] [2022-12-14 06:35:04,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:35:04,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:35:04,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:35:04,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:35:04,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:35:04,783 INFO L87 Difference]: Start difference. First operand 1105928 states and 1631243 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)