./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.07.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.07.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur --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 ef314c292717d2a6588e316ab1f60892c9568f1799857e58c021646ee7eb2cde --- 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-38b53e6 [2022-11-26 00:54:32,731 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:54:32,734 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:54:32,775 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:54:32,775 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:54:32,779 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:54:32,782 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:54:32,785 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:54:32,787 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:54:32,792 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:54:32,794 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:54:32,796 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:54:32,796 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:54:32,799 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:54:32,801 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:54:32,803 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:54:32,804 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:54:32,805 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:54:32,807 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:54:32,813 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:54:32,815 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:54:32,817 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:54:32,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:54:32,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:54:32,829 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:54:32,830 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:54:32,830 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:54:32,832 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:54:32,833 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:54:32,834 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:54:32,834 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:54:32,835 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:54:32,837 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:54:32,838 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:54:32,840 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:54:32,840 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:54:32,841 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:54:32,842 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:54:32,842 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:54:32,843 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:54:32,844 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:54:32,845 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:54:32,883 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:54:32,883 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:54:32,884 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:54:32,884 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:54:32,885 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:54:32,885 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:54:32,886 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:54:32,886 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:54:32,886 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:54:32,886 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:54:32,887 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:54:32,888 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:54:32,888 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:54:32,888 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:54:32,888 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:54:32,889 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:54:32,889 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:54:32,889 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:54:32,890 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:54:32,890 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:54:32,890 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:54:32,891 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:54:32,891 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:54:32,891 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:54:32,891 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:54:32,891 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:54:32,892 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:54:32,892 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:54:32,892 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:54:32,892 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:54:32,893 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:54:32,893 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:54:32,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:54:32,894 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:54:32,894 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:54:32,894 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:54:32,894 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:54:32,895 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:54:32,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:54:32,895 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:54:32,895 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:54:32,895 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_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef314c292717d2a6588e316ab1f60892c9568f1799857e58c021646ee7eb2cde [2022-11-26 00:54:33,190 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:54:33,225 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:54:33,228 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:54:33,229 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:54:33,229 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:54:33,231 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.07.cil-1.c [2022-11-26 00:54:36,318 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:54:36,938 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:54:36,939 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/sv-benchmarks/c/combinations/Problem05_label40+token_ring.07.cil-1.c [2022-11-26 00:54:36,990 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/data/720faf099/a0f0b68b79c94631ba9d0735d19c3ff4/FLAGa106950af [2022-11-26 00:54:37,010 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/data/720faf099/a0f0b68b79c94631ba9d0735d19c3ff4 [2022-11-26 00:54:37,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:54:37,014 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:54:37,018 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:54:37,018 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:54:37,021 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:54:37,022 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:54:37" (1/1) ... [2022-11-26 00:54:37,023 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@180015d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:54:37, skipping insertion in model container [2022-11-26 00:54:37,024 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:54:37" (1/1) ... [2022-11-26 00:54:37,032 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:54:37,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:54:39,391 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_f7568520-3d2b-4258-9ffd-2773cd899959/sv-benchmarks/c/combinations/Problem05_label40+token_ring.07.cil-1.c[377069,377082] [2022-11-26 00:54:39,426 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_f7568520-3d2b-4258-9ffd-2773cd899959/sv-benchmarks/c/combinations/Problem05_label40+token_ring.07.cil-1.c[383339,383352] [2022-11-26 00:54:39,666 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:54:39,679 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:54:40,884 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_f7568520-3d2b-4258-9ffd-2773cd899959/sv-benchmarks/c/combinations/Problem05_label40+token_ring.07.cil-1.c[377069,377082] [2022-11-26 00:54:40,895 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_f7568520-3d2b-4258-9ffd-2773cd899959/sv-benchmarks/c/combinations/Problem05_label40+token_ring.07.cil-1.c[383339,383352] [2022-11-26 00:54:40,964 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:54:41,026 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:54:41,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:54:41 WrapperNode [2022-11-26 00:54:41,028 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:54:41,029 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:54:41,029 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:54:41,029 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:54:41,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:54:41" (1/1) ... [2022-11-26 00:54:41,123 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:54:41" (1/1) ... [2022-11-26 00:54:41,396 INFO L138 Inliner]: procedures = 58, calls = 62, calls flagged for inlining = 36, calls inlined = 36, statements flattened = 12909 [2022-11-26 00:54:41,397 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:54:41,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:54:41,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:54:41,398 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:54:41,408 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:54:41" (1/1) ... [2022-11-26 00:54:41,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:54:41" (1/1) ... [2022-11-26 00:54:41,553 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:54:41" (1/1) ... [2022-11-26 00:54:41,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:54:41" (1/1) ... [2022-11-26 00:54:41,791 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:54:41" (1/1) ... [2022-11-26 00:54:41,926 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:54:41" (1/1) ... [2022-11-26 00:54:41,981 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:54:41" (1/1) ... [2022-11-26 00:54:42,002 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:54:41" (1/1) ... [2022-11-26 00:54:42,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:54:42,127 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:54:42,127 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:54:42,127 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:54:42,129 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:54:41" (1/1) ... [2022-11-26 00:54:42,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:54:42,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:54:42,192 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:54:42,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:54:42,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:54:42,330 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-26 00:54:42,330 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-26 00:54:42,330 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-26 00:54:42,330 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-26 00:54:42,330 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-26 00:54:42,331 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-26 00:54:42,331 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-26 00:54:42,331 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-26 00:54:42,331 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-26 00:54:42,331 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-26 00:54:42,331 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-26 00:54:42,332 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-26 00:54:42,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:54:42,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:54:42,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:54:42,570 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:54:42,572 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:54:51,385 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:54:53,869 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:54:53,869 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-26 00:54:53,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:54:53 BoogieIcfgContainer [2022-11-26 00:54:53,875 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:54:53,878 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:54:53,878 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:54:53,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:54:53,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:54:37" (1/3) ... [2022-11-26 00:54:53,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@142bcab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:54:53, skipping insertion in model container [2022-11-26 00:54:53,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:54:41" (2/3) ... [2022-11-26 00:54:53,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@142bcab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:54:53, skipping insertion in model container [2022-11-26 00:54:53,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:54:53" (3/3) ... [2022-11-26 00:54:53,885 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label40+token_ring.07.cil-1.c [2022-11-26 00:54:53,905 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:54:53,905 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-26 00:54:53,987 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:54:53,993 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;@417c65f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:54:53,993 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-26 00:54:54,004 INFO L276 IsEmpty]: Start isEmpty. Operand has 1776 states, 1746 states have (on average 1.9662084765177548) internal successors, (3433), 1749 states have internal predecessors, (3433), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-26 00:54:54,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-26 00:54:54,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:54,018 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] [2022-11-26 00:54:54,019 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:54:54,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:54,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1071868383, now seen corresponding path program 1 times [2022-11-26 00:54:54,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:54,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174261505] [2022-11-26 00:54:54,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:54,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:54,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:54,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:54:54,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:54,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174261505] [2022-11-26 00:54:54,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174261505] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:54:54,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:54:54,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:54:54,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176612582] [2022-11-26 00:54:54,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:54:54,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:54:54,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:54,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:54:54,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:54:54,594 INFO L87 Difference]: Start difference. First operand has 1776 states, 1746 states have (on average 1.9662084765177548) internal successors, (3433), 1749 states have internal predecessors, (3433), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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) [2022-11-26 00:54:55,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:54:55,736 INFO L93 Difference]: Finished difference Result 3668 states and 7147 transitions. [2022-11-26 00:54:55,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:54:55,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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 52 [2022-11-26 00:54:55,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:54:55,763 INFO L225 Difference]: With dead ends: 3668 [2022-11-26 00:54:55,769 INFO L226 Difference]: Without dead ends: 1891 [2022-11-26 00:54:55,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:54:55,786 INFO L413 NwaCegarLoop]: 3361 mSDtfsCounter, 3614 mSDsluCounter, 3283 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3614 SdHoareTripleChecker+Valid, 6644 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:54:55,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3614 Valid, 6644 Invalid, 660 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:54:55,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2022-11-26 00:54:55,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1890. [2022-11-26 00:54:55,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1838 states have (on average 1.9368879216539716) internal successors, (3560), 1841 states have internal predecessors, (3560), 38 states have call successors, (38), 12 states have call predecessors, (38), 12 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2022-11-26 00:54:55,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 3636 transitions. [2022-11-26 00:54:55,981 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 3636 transitions. Word has length 52 [2022-11-26 00:54:55,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:55,982 INFO L495 AbstractCegarLoop]: Abstraction has 1890 states and 3636 transitions. [2022-11-26 00:54:55,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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) [2022-11-26 00:54:55,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 3636 transitions. [2022-11-26 00:54:55,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-26 00:54:55,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:55,999 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:54:55,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:54:56,000 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:54:56,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:56,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1856739895, now seen corresponding path program 1 times [2022-11-26 00:54:56,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:56,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236633617] [2022-11-26 00:54:56,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:56,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:56,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:56,287 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:54:56,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:56,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236633617] [2022-11-26 00:54:56,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236633617] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:54:56,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740529480] [2022-11-26 00:54:56,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:56,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:56,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:54:56,293 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:54:56,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:54:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:56,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:54:56,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:54:56,680 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-26 00:54:56,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:54:56,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740529480] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:54:56,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:54:56,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-26 00:54:56,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26829521] [2022-11-26 00:54:56,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:54:56,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:54:56,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:56,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:54:56,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:54:56,687 INFO L87 Difference]: Start difference. First operand 1890 states and 3636 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 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) [2022-11-26 00:54:57,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:54:57,434 INFO L93 Difference]: Finished difference Result 2371 states and 4365 transitions. [2022-11-26 00:54:57,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:54:57,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 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 101 [2022-11-26 00:54:57,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:54:57,453 INFO L225 Difference]: With dead ends: 2371 [2022-11-26 00:54:57,453 INFO L226 Difference]: Without dead ends: 2127 [2022-11-26 00:54:57,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:54:57,457 INFO L413 NwaCegarLoop]: 3258 mSDtfsCounter, 3438 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3438 SdHoareTripleChecker+Valid, 3408 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:54:57,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3438 Valid, 3408 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:54:57,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2022-11-26 00:54:57,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 2123. [2022-11-26 00:54:57,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2027 states have (on average 1.892945239269857) internal successors, (3837), 2031 states have internal predecessors, (3837), 70 states have call successors, (70), 24 states have call predecessors, (70), 24 states have return successors, (70), 68 states have call predecessors, (70), 70 states have call successors, (70) [2022-11-26 00:54:57,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 3977 transitions. [2022-11-26 00:54:57,547 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 3977 transitions. Word has length 101 [2022-11-26 00:54:57,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:57,547 INFO L495 AbstractCegarLoop]: Abstraction has 2123 states and 3977 transitions. [2022-11-26 00:54:57,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 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) [2022-11-26 00:54:57,548 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 3977 transitions. [2022-11-26 00:54:57,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-26 00:54:57,551 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:57,551 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:54:57,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:54:57,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:57,760 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:54:57,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:57,761 INFO L85 PathProgramCache]: Analyzing trace with hash -753680587, now seen corresponding path program 1 times [2022-11-26 00:54:57,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:57,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215326553] [2022-11-26 00:54:57,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:57,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:57,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:58,065 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:54:58,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:58,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215326553] [2022-11-26 00:54:58,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215326553] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:54:58,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219878394] [2022-11-26 00:54:58,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:58,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:58,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:54:58,067 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:54:58,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:54:58,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:58,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:54:58,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:54:58,335 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-26 00:54:58,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:54:58,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219878394] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:54:58,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:54:58,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-26 00:54:58,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768829311] [2022-11-26 00:54:58,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:54:58,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:54:58,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:58,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:54:58,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:54:58,338 INFO L87 Difference]: Start difference. First operand 2123 states and 3977 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 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) [2022-11-26 00:54:59,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:54:59,015 INFO L93 Difference]: Finished difference Result 3064 states and 5396 transitions. [2022-11-26 00:54:59,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:54:59,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 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 101 [2022-11-26 00:54:59,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:54:59,030 INFO L225 Difference]: With dead ends: 3064 [2022-11-26 00:54:59,037 INFO L226 Difference]: Without dead ends: 2587 [2022-11-26 00:54:59,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:54:59,045 INFO L413 NwaCegarLoop]: 3230 mSDtfsCounter, 3435 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3435 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:54:59,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3435 Valid, 3380 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:54:59,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2022-11-26 00:54:59,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 2581. [2022-11-26 00:54:59,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2581 states, 2399 states have (on average 1.8253438932888704) internal successors, (4379), 2405 states have internal predecessors, (4379), 132 states have call successors, (132), 48 states have call predecessors, (132), 48 states have return successors, (132), 128 states have call predecessors, (132), 132 states have call successors, (132) [2022-11-26 00:54:59,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2581 states to 2581 states and 4643 transitions. [2022-11-26 00:54:59,170 INFO L78 Accepts]: Start accepts. Automaton has 2581 states and 4643 transitions. Word has length 101 [2022-11-26 00:54:59,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:59,172 INFO L495 AbstractCegarLoop]: Abstraction has 2581 states and 4643 transitions. [2022-11-26 00:54:59,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 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) [2022-11-26 00:54:59,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2581 states and 4643 transitions. [2022-11-26 00:54:59,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-26 00:54:59,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:59,188 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:54:59,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:54:59,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:59,396 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:54:59,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:59,397 INFO L85 PathProgramCache]: Analyzing trace with hash -250615049, now seen corresponding path program 1 times [2022-11-26 00:54:59,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:59,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147141268] [2022-11-26 00:54:59,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:59,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:59,692 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:54:59,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:59,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147141268] [2022-11-26 00:54:59,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147141268] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:54:59,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582472415] [2022-11-26 00:54:59,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:59,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:59,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:54:59,701 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:54:59,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:54:59,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:59,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:54:59,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:54:59,991 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:54:59,991 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:54:59,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582472415] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:54:59,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:54:59,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-26 00:54:59,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738176224] [2022-11-26 00:54:59,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:54:59,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:54:59,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:59,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:54:59,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:54:59,996 INFO L87 Difference]: Start difference. First operand 2581 states and 4643 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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) [2022-11-26 00:55:00,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:55:00,710 INFO L93 Difference]: Finished difference Result 4426 states and 7408 transitions. [2022-11-26 00:55:00,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:55:00,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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 101 [2022-11-26 00:55:00,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:55:00,737 INFO L225 Difference]: With dead ends: 4426 [2022-11-26 00:55:00,738 INFO L226 Difference]: Without dead ends: 3491 [2022-11-26 00:55:00,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:55:00,746 INFO L413 NwaCegarLoop]: 3230 mSDtfsCounter, 3429 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3429 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:55:00,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3429 Valid, 3380 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:55:00,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3491 states. [2022-11-26 00:55:00,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3491 to 3481. [2022-11-26 00:55:00,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3481 states, 3131 states have (on average 1.7371446822101566) internal successors, (5439), 3141 states have internal predecessors, (5439), 252 states have call successors, (252), 96 states have call predecessors, (252), 96 states have return successors, (252), 244 states have call predecessors, (252), 252 states have call successors, (252) [2022-11-26 00:55:00,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3481 states to 3481 states and 5943 transitions. [2022-11-26 00:55:00,954 INFO L78 Accepts]: Start accepts. Automaton has 3481 states and 5943 transitions. Word has length 101 [2022-11-26 00:55:00,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:55:00,955 INFO L495 AbstractCegarLoop]: Abstraction has 3481 states and 5943 transitions. [2022-11-26 00:55:00,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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) [2022-11-26 00:55:00,956 INFO L276 IsEmpty]: Start isEmpty. Operand 3481 states and 5943 transitions. [2022-11-26 00:55:00,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-26 00:55:00,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:55:00,964 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:55:00,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:55:01,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:55:01,174 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:55:01,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:55:01,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1686073287, now seen corresponding path program 1 times [2022-11-26 00:55:01,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:55:01,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929253586] [2022-11-26 00:55:01,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:55:01,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:55:01,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:55:01,341 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:55:01,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:55:01,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929253586] [2022-11-26 00:55:01,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929253586] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:55:01,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551871008] [2022-11-26 00:55:01,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:55:01,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:55:01,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:55:01,345 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:55:01,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:55:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:55:01,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:55:01,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:55:01,664 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:55:01,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:55:01,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551871008] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:55:01,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:55:01,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-26 00:55:01,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554145528] [2022-11-26 00:55:01,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:55:01,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:55:01,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:55:01,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:55:01,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:55:01,668 INFO L87 Difference]: Start difference. First operand 3481 states and 5943 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (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) [2022-11-26 00:55:02,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:55:02,357 INFO L93 Difference]: Finished difference Result 7102 states and 11332 transitions. [2022-11-26 00:55:02,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:55:02,358 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (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 101 [2022-11-26 00:55:02,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:55:02,388 INFO L225 Difference]: With dead ends: 7102 [2022-11-26 00:55:02,388 INFO L226 Difference]: Without dead ends: 5267 [2022-11-26 00:55:02,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:55:02,543 INFO L413 NwaCegarLoop]: 3230 mSDtfsCounter, 3423 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3423 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:55:02,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3423 Valid, 3380 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:55:02,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5267 states. [2022-11-26 00:55:02,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5267 to 5249. [2022-11-26 00:55:02,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5249 states, 4571 states have (on average 1.643185298621746) internal successors, (7511), 4589 states have internal predecessors, (7511), 484 states have call successors, (484), 192 states have call predecessors, (484), 192 states have return successors, (484), 468 states have call predecessors, (484), 484 states have call successors, (484) [2022-11-26 00:55:02,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5249 states to 5249 states and 8479 transitions. [2022-11-26 00:55:02,794 INFO L78 Accepts]: Start accepts. Automaton has 5249 states and 8479 transitions. Word has length 101 [2022-11-26 00:55:02,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:55:02,794 INFO L495 AbstractCegarLoop]: Abstraction has 5249 states and 8479 transitions. [2022-11-26 00:55:02,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (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) [2022-11-26 00:55:02,795 INFO L276 IsEmpty]: Start isEmpty. Operand 5249 states and 8479 transitions. [2022-11-26 00:55:02,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-26 00:55:02,804 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:55:02,805 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:55:02,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:55:03,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:55:03,013 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:55:03,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:55:03,014 INFO L85 PathProgramCache]: Analyzing trace with hash 2074005243, now seen corresponding path program 1 times [2022-11-26 00:55:03,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:55:03,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474768434] [2022-11-26 00:55:03,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:55:03,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:55:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:55:03,147 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 00:55:03,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:55:03,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474768434] [2022-11-26 00:55:03,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474768434] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:55:03,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:55:03,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:55:03,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110783562] [2022-11-26 00:55:03,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:55:03,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:55:03,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:55:03,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:55:03,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:55:03,151 INFO L87 Difference]: Start difference. First operand 5249 states and 8479 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-26 00:55:04,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:55:04,046 INFO L93 Difference]: Finished difference Result 8051 states and 12672 transitions. [2022-11-26 00:55:04,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:55:04,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 101 [2022-11-26 00:55:04,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:55:04,090 INFO L225 Difference]: With dead ends: 8051 [2022-11-26 00:55:04,090 INFO L226 Difference]: Without dead ends: 6209 [2022-11-26 00:55:04,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:55:04,105 INFO L413 NwaCegarLoop]: 3300 mSDtfsCounter, 82 mSDsluCounter, 3222 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 6522 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:55:04,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 6522 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:55:04,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6209 states. [2022-11-26 00:55:04,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6209 to 5889. [2022-11-26 00:55:04,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5889 states, 5179 states have (on average 1.6510909441977215) internal successors, (8551), 5197 states have internal predecessors, (8551), 500 states have call successors, (500), 208 states have call predecessors, (500), 208 states have return successors, (500), 484 states have call predecessors, (500), 500 states have call successors, (500) [2022-11-26 00:55:04,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5889 states to 5889 states and 9551 transitions. [2022-11-26 00:55:04,438 INFO L78 Accepts]: Start accepts. Automaton has 5889 states and 9551 transitions. Word has length 101 [2022-11-26 00:55:04,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:55:04,440 INFO L495 AbstractCegarLoop]: Abstraction has 5889 states and 9551 transitions. [2022-11-26 00:55:04,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-26 00:55:04,442 INFO L276 IsEmpty]: Start isEmpty. Operand 5889 states and 9551 transitions. [2022-11-26 00:55:04,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-26 00:55:04,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:55:04,457 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:55:04,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-26 00:55:04,458 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:55:04,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:55:04,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1150627260, now seen corresponding path program 1 times [2022-11-26 00:55:04,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:55:04,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098825395] [2022-11-26 00:55:04,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:55:04,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:55:04,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:55:04,589 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-26 00:55:04,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:55:04,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098825395] [2022-11-26 00:55:04,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098825395] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:55:04,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:55:04,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:55:04,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045113456] [2022-11-26 00:55:04,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:55:04,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:55:04,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:55:04,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:55:04,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:55:04,596 INFO L87 Difference]: Start difference. First operand 5889 states and 9551 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-26 00:55:05,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:55:05,824 INFO L93 Difference]: Finished difference Result 14230 states and 22100 transitions. [2022-11-26 00:55:05,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:55:05,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 136 [2022-11-26 00:55:05,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:55:05,877 INFO L225 Difference]: With dead ends: 14230 [2022-11-26 00:55:05,877 INFO L226 Difference]: Without dead ends: 9987 [2022-11-26 00:55:05,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:55:05,893 INFO L413 NwaCegarLoop]: 3232 mSDtfsCounter, 3427 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3427 SdHoareTripleChecker+Valid, 3382 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:55:05,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3427 Valid, 3382 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 00:55:05,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9987 states. [2022-11-26 00:55:06,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9987 to 9937. [2022-11-26 00:55:06,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9937 states, 8555 states have (on average 1.5793103448275863) internal successors, (13511), 8589 states have internal predecessors, (13511), 964 states have call successors, (964), 416 states have call predecessors, (964), 416 states have return successors, (964), 932 states have call predecessors, (964), 964 states have call successors, (964) [2022-11-26 00:55:06,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9937 states to 9937 states and 15439 transitions. [2022-11-26 00:55:06,655 INFO L78 Accepts]: Start accepts. Automaton has 9937 states and 15439 transitions. Word has length 136 [2022-11-26 00:55:06,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:55:06,656 INFO L495 AbstractCegarLoop]: Abstraction has 9937 states and 15439 transitions. [2022-11-26 00:55:06,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-26 00:55:06,656 INFO L276 IsEmpty]: Start isEmpty. Operand 9937 states and 15439 transitions. [2022-11-26 00:55:06,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-26 00:55:06,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:55:06,689 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:55:06,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 00:55:06,689 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:55:06,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:55:06,690 INFO L85 PathProgramCache]: Analyzing trace with hash 147224065, now seen corresponding path program 1 times [2022-11-26 00:55:06,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:55:06,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764781043] [2022-11-26 00:55:06,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:55:06,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:55:06,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:55:06,843 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-26 00:55:06,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:55:06,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764781043] [2022-11-26 00:55:06,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764781043] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:55:06,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:55:06,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:55:06,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263753130] [2022-11-26 00:55:06,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:55:06,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:55:06,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:55:06,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:55:06,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:55:06,847 INFO L87 Difference]: Start difference. First operand 9937 states and 15439 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-26 00:55:08,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:55:08,514 INFO L93 Difference]: Finished difference Result 26230 states and 39732 transitions. [2022-11-26 00:55:08,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:55:08,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 136 [2022-11-26 00:55:08,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:55:08,617 INFO L225 Difference]: With dead ends: 26230 [2022-11-26 00:55:08,617 INFO L226 Difference]: Without dead ends: 17939 [2022-11-26 00:55:08,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:55:08,657 INFO L413 NwaCegarLoop]: 3232 mSDtfsCounter, 3429 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3429 SdHoareTripleChecker+Valid, 3382 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:55:08,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3429 Valid, 3382 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:55:08,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17939 states. [2022-11-26 00:55:09,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17939 to 17841. [2022-11-26 00:55:09,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17841 states, 15147 states have (on average 1.5257806826434277) internal successors, (23111), 15213 states have internal predecessors, (23111), 1860 states have call successors, (1860), 832 states have call predecessors, (1860), 832 states have return successors, (1860), 1796 states have call predecessors, (1860), 1860 states have call successors, (1860) [2022-11-26 00:55:09,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17841 states to 17841 states and 26831 transitions. [2022-11-26 00:55:09,882 INFO L78 Accepts]: Start accepts. Automaton has 17841 states and 26831 transitions. Word has length 136 [2022-11-26 00:55:09,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:55:09,884 INFO L495 AbstractCegarLoop]: Abstraction has 17841 states and 26831 transitions. [2022-11-26 00:55:09,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-26 00:55:09,885 INFO L276 IsEmpty]: Start isEmpty. Operand 17841 states and 26831 transitions. [2022-11-26 00:55:09,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-26 00:55:09,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:55:09,934 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:55:09,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 00:55:09,935 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:55:09,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:55:09,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1249285814, now seen corresponding path program 1 times [2022-11-26 00:55:09,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:55:09,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962357253] [2022-11-26 00:55:09,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:55:09,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:55:09,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:55:10,074 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-26 00:55:10,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:55:10,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962357253] [2022-11-26 00:55:10,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962357253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:55:10,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:55:10,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:55:10,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104147025] [2022-11-26 00:55:10,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:55:10,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:55:10,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:55:10,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:55:10,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:55:10,079 INFO L87 Difference]: Start difference. First operand 17841 states and 26831 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-26 00:55:12,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:55:12,597 INFO L93 Difference]: Finished difference Result 49654 states and 73812 transitions. [2022-11-26 00:55:12,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:55:12,598 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 136 [2022-11-26 00:55:12,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:55:12,812 INFO L225 Difference]: With dead ends: 49654 [2022-11-26 00:55:12,813 INFO L226 Difference]: Without dead ends: 33459 [2022-11-26 00:55:12,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:55:12,899 INFO L413 NwaCegarLoop]: 3240 mSDtfsCounter, 3432 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3432 SdHoareTripleChecker+Valid, 3390 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:55:12,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3432 Valid, 3390 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:55:12,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33459 states. [2022-11-26 00:55:15,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33459 to 33265. [2022-11-26 00:55:15,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33265 states, 28011 states have (on average 1.4876655599585877) internal successors, (41671), 28141 states have internal predecessors, (41671), 3588 states have call successors, (3588), 1664 states have call predecessors, (3588), 1664 states have return successors, (3588), 3460 states have call predecessors, (3588), 3588 states have call successors, (3588) [2022-11-26 00:55:15,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33265 states to 33265 states and 48847 transitions. [2022-11-26 00:55:15,197 INFO L78 Accepts]: Start accepts. Automaton has 33265 states and 48847 transitions. Word has length 136 [2022-11-26 00:55:15,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:55:15,198 INFO L495 AbstractCegarLoop]: Abstraction has 33265 states and 48847 transitions. [2022-11-26 00:55:15,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-26 00:55:15,199 INFO L276 IsEmpty]: Start isEmpty. Operand 33265 states and 48847 transitions. [2022-11-26 00:55:15,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-26 00:55:15,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:55:15,328 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:55:15,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-26 00:55:15,329 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:55:15,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:55:15,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1554651135, now seen corresponding path program 1 times [2022-11-26 00:55:15,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:55:15,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433628325] [2022-11-26 00:55:15,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:55:15,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:55:15,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:55:15,464 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-26 00:55:15,465 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:55:15,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433628325] [2022-11-26 00:55:15,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433628325] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:55:15,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:55:15,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:55:15,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728969340] [2022-11-26 00:55:15,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:55:15,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:55:15,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:55:15,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:55:15,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:55:15,468 INFO L87 Difference]: Start difference. First operand 33265 states and 48847 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-26 00:55:19,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:55:19,116 INFO L93 Difference]: Finished difference Result 84725 states and 125265 transitions. [2022-11-26 00:55:19,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:55:19,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 156 [2022-11-26 00:55:19,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:55:19,347 INFO L225 Difference]: With dead ends: 84725 [2022-11-26 00:55:19,347 INFO L226 Difference]: Without dead ends: 53107 [2022-11-26 00:55:19,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:55:19,422 INFO L413 NwaCegarLoop]: 3255 mSDtfsCounter, 92 mSDsluCounter, 3220 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 6475 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:55:19,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 6475 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:55:19,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53107 states. [2022-11-26 00:55:22,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53107 to 46585. [2022-11-26 00:55:22,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46585 states, 40559 states have (on average 1.5482383687960748) internal successors, (62795), 40690 states have internal predecessors, (62795), 3974 states have call successors, (3974), 2050 states have call predecessors, (3974), 2050 states have return successors, (3974), 3845 states have call predecessors, (3974), 3974 states have call successors, (3974) [2022-11-26 00:55:22,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46585 states to 46585 states and 70743 transitions. [2022-11-26 00:55:22,270 INFO L78 Accepts]: Start accepts. Automaton has 46585 states and 70743 transitions. Word has length 156 [2022-11-26 00:55:22,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:55:22,271 INFO L495 AbstractCegarLoop]: Abstraction has 46585 states and 70743 transitions. [2022-11-26 00:55:22,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-26 00:55:22,271 INFO L276 IsEmpty]: Start isEmpty. Operand 46585 states and 70743 transitions. [2022-11-26 00:55:22,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-26 00:55:22,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:55:22,411 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:55:22,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-26 00:55:22,411 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:55:22,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:55:22,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1339075499, now seen corresponding path program 2 times [2022-11-26 00:55:22,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:55:22,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184455569] [2022-11-26 00:55:22,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:55:22,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:55:22,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:55:22,630 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-26 00:55:22,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:55:22,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184455569] [2022-11-26 00:55:22,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184455569] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:55:22,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963002772] [2022-11-26 00:55:22,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:55:22,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:55:22,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:55:22,633 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:55:22,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:55:22,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:55:22,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:55:22,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:55:22,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:55:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-26 00:55:22,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:55:22,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963002772] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:55:22,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:55:22,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-26 00:55:22,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710152381] [2022-11-26 00:55:22,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:55:22,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:55:22,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:55:22,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:55:22,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:55:22,919 INFO L87 Difference]: Start difference. First operand 46585 states and 70743 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-26 00:55:26,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:55:26,360 INFO L93 Difference]: Finished difference Result 87933 states and 133849 transitions. [2022-11-26 00:55:26,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:55:26,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 156 [2022-11-26 00:55:26,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:55:26,589 INFO L225 Difference]: With dead ends: 87933 [2022-11-26 00:55:26,589 INFO L226 Difference]: Without dead ends: 65083 [2022-11-26 00:55:26,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:55:26,639 INFO L413 NwaCegarLoop]: 3334 mSDtfsCounter, 125 mSDsluCounter, 3224 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 6558 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:55:26,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 6558 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 00:55:26,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65083 states. [2022-11-26 00:55:29,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65083 to 59129. [2022-11-26 00:55:29,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59129 states, 52335 states have (on average 1.5740708894621191) internal successors, (82379), 52466 states have internal predecessors, (82379), 4358 states have call successors, (4358), 2434 states have call predecessors, (4358), 2434 states have return successors, (4358), 4229 states have call predecessors, (4358), 4358 states have call successors, (4358) [2022-11-26 00:55:29,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59129 states to 59129 states and 91095 transitions. [2022-11-26 00:55:29,869 INFO L78 Accepts]: Start accepts. Automaton has 59129 states and 91095 transitions. Word has length 156 [2022-11-26 00:55:29,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:55:29,870 INFO L495 AbstractCegarLoop]: Abstraction has 59129 states and 91095 transitions. [2022-11-26 00:55:29,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-26 00:55:29,871 INFO L276 IsEmpty]: Start isEmpty. Operand 59129 states and 91095 transitions. [2022-11-26 00:55:29,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-26 00:55:29,994 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:55:29,994 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:55:30,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:55:30,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-26 00:55:30,210 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:55:30,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:55:30,211 INFO L85 PathProgramCache]: Analyzing trace with hash -2129783156, now seen corresponding path program 3 times [2022-11-26 00:55:30,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:55:30,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617082895] [2022-11-26 00:55:30,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:55:30,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:55:30,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:55:30,622 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-26 00:55:30,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:55:30,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617082895] [2022-11-26 00:55:30,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617082895] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:55:30,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952331517] [2022-11-26 00:55:30,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:55:30,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:55:30,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:55:30,624 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:55:30,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:55:30,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:55:30,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:55:30,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:55:30,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:55:30,851 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-26 00:55:30,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:55:30,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952331517] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:55:30,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:55:30,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-26 00:55:30,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295496551] [2022-11-26 00:55:30,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:55:30,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:55:30,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:55:30,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:55:30,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:55:30,856 INFO L87 Difference]: Start difference. First operand 59129 states and 91095 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-26 00:55:33,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:55:33,934 INFO L93 Difference]: Finished difference Result 88477 states and 137113 transitions. [2022-11-26 00:55:33,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:55:33,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 156 [2022-11-26 00:55:33,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:55:34,107 INFO L225 Difference]: With dead ends: 88477 [2022-11-26 00:55:34,108 INFO L226 Difference]: Without dead ends: 59259 [2022-11-26 00:55:34,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:55:34,172 INFO L413 NwaCegarLoop]: 3351 mSDtfsCounter, 166 mSDsluCounter, 3208 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 6559 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:55:34,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 6559 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:55:34,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59259 states. [2022-11-26 00:55:36,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59259 to 58809. [2022-11-26 00:55:36,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58809 states, 52015 states have (on average 1.564068057291166) internal successors, (81355), 52146 states have internal predecessors, (81355), 4358 states have call successors, (4358), 2434 states have call predecessors, (4358), 2434 states have return successors, (4358), 4229 states have call predecessors, (4358), 4358 states have call successors, (4358) [2022-11-26 00:55:37,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58809 states to 58809 states and 90071 transitions. [2022-11-26 00:55:37,063 INFO L78 Accepts]: Start accepts. Automaton has 58809 states and 90071 transitions. Word has length 156 [2022-11-26 00:55:37,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:55:37,063 INFO L495 AbstractCegarLoop]: Abstraction has 58809 states and 90071 transitions. [2022-11-26 00:55:37,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-26 00:55:37,064 INFO L276 IsEmpty]: Start isEmpty. Operand 58809 states and 90071 transitions. [2022-11-26 00:55:37,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-26 00:55:37,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:55:37,184 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-26 00:55:37,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:55:37,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:55:37,399 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:55:37,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:55:37,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1641863469, now seen corresponding path program 1 times [2022-11-26 00:55:37,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:55:37,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910615164] [2022-11-26 00:55:37,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:55:37,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:55:37,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:55:37,769 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 10 proven. 48 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-26 00:55:37,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:55:37,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910615164] [2022-11-26 00:55:37,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910615164] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:55:37,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669799644] [2022-11-26 00:55:37,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:55:37,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:55:37,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:55:37,772 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:55:37,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7568520-3d2b-4258-9ffd-2773cd899959/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:55:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:55:38,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:55:38,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:55:38,049 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 00:55:38,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:55:38,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669799644] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:55:38,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:55:38,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-26 00:55:38,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159012267] [2022-11-26 00:55:38,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:55:38,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:55:38,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:55:38,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:55:38,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:55:38,052 INFO L87 Difference]: Start difference. First operand 58809 states and 90071 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-26 00:55:41,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:55:41,320 INFO L93 Difference]: Finished difference Result 95989 states and 144626 transitions. [2022-11-26 00:55:41,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:55:41,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 156 [2022-11-26 00:55:41,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:55:41,497 INFO L225 Difference]: With dead ends: 95989 [2022-11-26 00:55:41,497 INFO L226 Difference]: Without dead ends: 67251 [2022-11-26 00:55:41,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:55:41,548 INFO L413 NwaCegarLoop]: 3239 mSDtfsCounter, 3432 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3432 SdHoareTripleChecker+Valid, 3283 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:55:41,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3432 Valid, 3283 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:55:41,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67251 states.