./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW --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 ce176716d91d866602a372020396224af9fcf4c5f81c6adcdcc0f1d83b0d658f --- 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-4e7fbc6 [2022-11-23 14:23:23,689 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:23:23,693 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:23:23,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:23:23,729 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:23:23,734 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:23:23,736 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:23:23,739 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:23:23,741 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:23:23,749 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:23:23,750 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:23:23,752 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:23:23,753 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:23:23,756 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:23:23,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:23:23,760 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:23:23,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:23:23,763 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:23:23,764 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:23:23,770 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:23:23,773 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:23:23,775 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:23:23,777 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:23:23,778 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:23:23,787 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:23:23,787 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:23:23,787 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:23:23,788 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:23:23,789 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:23:23,789 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:23:23,790 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:23:23,791 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:23:23,793 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:23:23,794 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:23:23,795 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:23:23,795 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:23:23,796 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:23:23,796 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:23:23,796 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:23:23,797 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:23:23,798 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:23:23,799 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:23:23,865 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:23:23,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:23:23,866 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:23:23,866 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:23:23,867 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:23:23,867 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:23:23,868 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:23:23,868 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:23:23,868 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:23:23,868 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:23:23,869 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:23:23,870 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:23:23,870 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:23:23,870 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:23:23,871 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:23:23,871 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:23:23,871 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:23:23,871 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:23:23,872 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:23:23,872 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:23:23,873 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:23:23,873 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:23:23,873 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:23:23,873 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:23:23,874 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:23:23,874 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:23:23,875 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:23:23,875 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:23:23,875 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:23:23,875 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:23:23,876 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:23:23,876 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:23:23,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:23:23,877 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:23:23,877 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:23:23,877 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:23:23,877 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:23:23,878 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:23:23,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:23:23,878 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:23:23,879 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:23:23,879 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_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce176716d91d866602a372020396224af9fcf4c5f81c6adcdcc0f1d83b0d658f [2022-11-23 14:23:24,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:23:24,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:23:24,207 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:23:24,208 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:23:24,208 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:23:24,210 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c [2022-11-23 14:23:27,369 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:23:27,638 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:23:27,638 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c [2022-11-23 14:23:27,653 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/data/c563ada6a/bc85e591b34942649e28b2573f501806/FLAG8aec78085 [2022-11-23 14:23:27,668 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/data/c563ada6a/bc85e591b34942649e28b2573f501806 [2022-11-23 14:23:27,672 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:23:27,676 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:23:27,678 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:23:27,678 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:23:27,682 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:23:27,683 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:23:27" (1/1) ... [2022-11-23 14:23:27,684 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@490fafaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:27, skipping insertion in model container [2022-11-23 14:23:27,685 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:23:27" (1/1) ... [2022-11-23 14:23:27,693 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:23:27,767 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:23:27,961 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_ff296090-7fb9-443f-8754-6178b452b040/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c[914,927] [2022-11-23 14:23:28,030 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_ff296090-7fb9-443f-8754-6178b452b040/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c[7115,7128] [2022-11-23 14:23:28,151 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:23:28,172 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:23:28,190 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_ff296090-7fb9-443f-8754-6178b452b040/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c[914,927] [2022-11-23 14:23:28,208 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_ff296090-7fb9-443f-8754-6178b452b040/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c[7115,7128] [2022-11-23 14:23:28,293 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:23:28,338 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:23:28,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:28 WrapperNode [2022-11-23 14:23:28,343 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:23:28,344 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:23:28,345 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:23:28,345 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:23:28,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:28" (1/1) ... [2022-11-23 14:23:28,371 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:28" (1/1) ... [2022-11-23 14:23:28,426 INFO L138 Inliner]: procedures = 79, calls = 97, calls flagged for inlining = 47, calls inlined = 47, statements flattened = 1103 [2022-11-23 14:23:28,433 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:23:28,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:23:28,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:23:28,434 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:23:28,446 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:28" (1/1) ... [2022-11-23 14:23:28,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:28" (1/1) ... [2022-11-23 14:23:28,458 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:28" (1/1) ... [2022-11-23 14:23:28,461 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:28" (1/1) ... [2022-11-23 14:23:28,491 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:28" (1/1) ... [2022-11-23 14:23:28,522 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:28" (1/1) ... [2022-11-23 14:23:28,537 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:28" (1/1) ... [2022-11-23 14:23:28,541 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:28" (1/1) ... [2022-11-23 14:23:28,551 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:23:28,554 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:23:28,554 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:23:28,554 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:23:28,555 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:28" (1/1) ... [2022-11-23 14:23:28,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:23:28,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:23:28,593 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:23:28,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:23:28,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:23:28,650 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-23 14:23:28,650 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-23 14:23:28,650 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-23 14:23:28,650 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-23 14:23:28,651 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-23 14:23:28,651 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-23 14:23:28,651 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-23 14:23:28,651 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-23 14:23:28,651 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-23 14:23:28,652 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-23 14:23:28,652 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-23 14:23:28,652 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-23 14:23:28,652 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-23 14:23:28,652 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-23 14:23:28,653 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-23 14:23:28,653 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-23 14:23:28,653 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-23 14:23:28,653 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-23 14:23:28,653 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-23 14:23:28,653 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-23 14:23:28,654 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-23 14:23:28,654 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-23 14:23:28,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:23:28,655 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-23 14:23:28,655 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-23 14:23:28,656 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-23 14:23:28,656 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-23 14:23:28,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:23:28,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:23:28,657 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-23 14:23:28,657 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-23 14:23:28,658 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-11-23 14:23:28,658 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-11-23 14:23:28,872 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:23:28,874 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:23:30,184 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:23:30,905 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:23:30,905 INFO L300 CfgBuilder]: Removed 20 assume(true) statements. [2022-11-23 14:23:30,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:23:30 BoogieIcfgContainer [2022-11-23 14:23:30,910 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:23:30,914 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:23:30,914 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:23:30,917 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:23:30,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:23:27" (1/3) ... [2022-11-23 14:23:30,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3078fff5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:23:30, skipping insertion in model container [2022-11-23 14:23:30,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:28" (2/3) ... [2022-11-23 14:23:30,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3078fff5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:23:30, skipping insertion in model container [2022-11-23 14:23:30,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:23:30" (3/3) ... [2022-11-23 14:23:30,928 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.13.cil-1.c [2022-11-23 14:23:30,949 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:23:30,950 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-23 14:23:31,040 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:23:31,050 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;@35ee0f12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:23:31,050 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-23 14:23:31,058 INFO L276 IsEmpty]: Start isEmpty. Operand has 277 states, 216 states have (on average 1.5509259259259258) internal successors, (335), 224 states have internal predecessors, (335), 43 states have call successors, (43), 15 states have call predecessors, (43), 15 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2022-11-23 14:23:31,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-23 14:23:31,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:23:31,073 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] [2022-11-23 14:23:31,073 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:23:31,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:23:31,079 INFO L85 PathProgramCache]: Analyzing trace with hash 582250703, now seen corresponding path program 1 times [2022-11-23 14:23:31,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:23:31,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230812022] [2022-11-23 14:23:31,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:23:31,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:23:31,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:23:31,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:23:31,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:23:31,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230812022] [2022-11-23 14:23:31,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230812022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:23:31,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:23:31,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:23:31,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149249711] [2022-11-23 14:23:31,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:23:31,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:23:31,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:23:31,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:23:31,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:23:31,614 INFO L87 Difference]: Start difference. First operand has 277 states, 216 states have (on average 1.5509259259259258) internal successors, (335), 224 states have internal predecessors, (335), 43 states have call successors, (43), 15 states have call predecessors, (43), 15 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-23 14:23:32,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:23:32,255 INFO L93 Difference]: Finished difference Result 604 states and 913 transitions. [2022-11-23 14:23:32,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:23:32,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-23 14:23:32,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:23:32,282 INFO L225 Difference]: With dead ends: 604 [2022-11-23 14:23:32,283 INFO L226 Difference]: Without dead ends: 331 [2022-11-23 14:23:32,294 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 [2022-11-23 14:23:32,299 INFO L413 NwaCegarLoop]: 395 mSDtfsCounter, 467 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:23:32,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 688 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 14:23:32,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-11-23 14:23:32,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 324. [2022-11-23 14:23:32,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 251 states have (on average 1.4661354581673307) internal successors, (368), 256 states have internal predecessors, (368), 51 states have call successors, (51), 22 states have call predecessors, (51), 20 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2022-11-23 14:23:32,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 466 transitions. [2022-11-23 14:23:32,407 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 466 transitions. Word has length 45 [2022-11-23 14:23:32,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:23:32,407 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 466 transitions. [2022-11-23 14:23:32,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-23 14:23:32,408 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 466 transitions. [2022-11-23 14:23:32,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-23 14:23:32,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:23:32,412 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] [2022-11-23 14:23:32,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:23:32,413 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:23:32,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:23:32,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1501225326, now seen corresponding path program 1 times [2022-11-23 14:23:32,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:23:32,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387780107] [2022-11-23 14:23:32,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:23:32,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:23:32,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:23:32,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:23:32,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:23:32,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387780107] [2022-11-23 14:23:32,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387780107] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:23:32,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:23:32,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 14:23:32,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145211680] [2022-11-23 14:23:32,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:23:32,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:23:32,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:23:32,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:23:32,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:23:32,597 INFO L87 Difference]: Start difference. First operand 324 states and 466 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-23 14:23:33,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:23:33,446 INFO L93 Difference]: Finished difference Result 726 states and 969 transitions. [2022-11-23 14:23:33,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:23:33,447 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-23 14:23:33,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:23:33,454 INFO L225 Difference]: With dead ends: 726 [2022-11-23 14:23:33,454 INFO L226 Difference]: Without dead ends: 594 [2022-11-23 14:23:33,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:23:33,457 INFO L413 NwaCegarLoop]: 472 mSDtfsCounter, 952 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 956 SdHoareTripleChecker+Valid, 1206 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:23:33,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [956 Valid, 1206 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 14:23:33,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-11-23 14:23:33,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 510. [2022-11-23 14:23:33,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 383 states have (on average 1.3785900783289817) internal successors, (528), 389 states have internal predecessors, (528), 78 states have call successors, (78), 45 states have call predecessors, (78), 47 states have return successors, (78), 77 states have call predecessors, (78), 74 states have call successors, (78) [2022-11-23 14:23:33,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 684 transitions. [2022-11-23 14:23:33,509 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 684 transitions. Word has length 45 [2022-11-23 14:23:33,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:23:33,510 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 684 transitions. [2022-11-23 14:23:33,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-23 14:23:33,511 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 684 transitions. [2022-11-23 14:23:33,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-23 14:23:33,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:23:33,512 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:23:33,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:23:33,513 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:23:33,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:23:33,513 INFO L85 PathProgramCache]: Analyzing trace with hash -36762483, now seen corresponding path program 1 times [2022-11-23 14:23:33,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:23:33,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101016887] [2022-11-23 14:23:33,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:23:33,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:23:33,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:23:33,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:23:33,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:23:33,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101016887] [2022-11-23 14:23:33,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101016887] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:23:33,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:23:33,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 14:23:33,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860315088] [2022-11-23 14:23:33,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:23:33,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:23:33,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:23:33,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:23:33,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:23:33,769 INFO L87 Difference]: Start difference. First operand 510 states and 684 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 14:23:34,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:23:34,919 INFO L93 Difference]: Finished difference Result 1026 states and 1300 transitions. [2022-11-23 14:23:34,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 14:23:34,920 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-11-23 14:23:34,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:23:34,931 INFO L225 Difference]: With dead ends: 1026 [2022-11-23 14:23:34,932 INFO L226 Difference]: Without dead ends: 724 [2022-11-23 14:23:34,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-23 14:23:34,942 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 566 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 1196 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:23:34,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [598 Valid, 1196 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 14:23:34,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-11-23 14:23:35,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 689. [2022-11-23 14:23:35,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 508 states have (on average 1.3385826771653544) internal successors, (680), 515 states have internal predecessors, (680), 105 states have call successors, (105), 68 states have call predecessors, (105), 74 states have return successors, (109), 107 states have call predecessors, (109), 101 states have call successors, (109) [2022-11-23 14:23:35,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 894 transitions. [2022-11-23 14:23:35,059 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 894 transitions. Word has length 46 [2022-11-23 14:23:35,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:23:35,061 INFO L495 AbstractCegarLoop]: Abstraction has 689 states and 894 transitions. [2022-11-23 14:23:35,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 14:23:35,062 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 894 transitions. [2022-11-23 14:23:35,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-23 14:23:35,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:23:35,072 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:23:35,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 14:23:35,074 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:23:35,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:23:35,078 INFO L85 PathProgramCache]: Analyzing trace with hash -457206006, now seen corresponding path program 1 times [2022-11-23 14:23:35,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:23:35,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007316343] [2022-11-23 14:23:35,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:23:35,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:23:35,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:23:35,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:23:35,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:23:35,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007316343] [2022-11-23 14:23:35,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007316343] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:23:35,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:23:35,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:23:35,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34966274] [2022-11-23 14:23:35,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:23:35,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:23:35,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:23:35,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:23:35,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:23:35,182 INFO L87 Difference]: Start difference. First operand 689 states and 894 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:23:35,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:23:35,387 INFO L93 Difference]: Finished difference Result 1253 states and 1564 transitions. [2022-11-23 14:23:35,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:23:35,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-11-23 14:23:35,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:23:35,394 INFO L225 Difference]: With dead ends: 1253 [2022-11-23 14:23:35,394 INFO L226 Difference]: Without dead ends: 821 [2022-11-23 14:23:35,398 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 [2022-11-23 14:23:35,404 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 67 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:23:35,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 664 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:23:35,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-11-23 14:23:35,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 716. [2022-11-23 14:23:35,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 531 states have (on average 1.3276836158192091) internal successors, (705), 538 states have internal predecessors, (705), 107 states have call successors, (107), 70 states have call predecessors, (107), 76 states have return successors, (111), 109 states have call predecessors, (111), 103 states have call successors, (111) [2022-11-23 14:23:35,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 923 transitions. [2022-11-23 14:23:35,484 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 923 transitions. Word has length 47 [2022-11-23 14:23:35,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:23:35,486 INFO L495 AbstractCegarLoop]: Abstraction has 716 states and 923 transitions. [2022-11-23 14:23:35,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:23:35,486 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 923 transitions. [2022-11-23 14:23:35,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-23 14:23:35,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:23:35,494 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:23:35,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 14:23:35,494 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:23:35,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:23:35,495 INFO L85 PathProgramCache]: Analyzing trace with hash -982022831, now seen corresponding path program 1 times [2022-11-23 14:23:35,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:23:35,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489413339] [2022-11-23 14:23:35,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:23:35,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:23:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:23:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:23:35,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:23:35,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489413339] [2022-11-23 14:23:35,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489413339] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:23:35,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:23:35,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:23:35,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732741619] [2022-11-23 14:23:35,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:23:35,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:23:35,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:23:35,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:23:35,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:23:35,638 INFO L87 Difference]: Start difference. First operand 716 states and 923 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:23:35,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:23:35,807 INFO L93 Difference]: Finished difference Result 906 states and 1144 transitions. [2022-11-23 14:23:35,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:23:35,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2022-11-23 14:23:35,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:23:35,812 INFO L225 Difference]: With dead ends: 906 [2022-11-23 14:23:35,813 INFO L226 Difference]: Without dead ends: 633 [2022-11-23 14:23:35,814 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 [2022-11-23 14:23:35,816 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 372 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:23:35,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 410 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:23:35,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-11-23 14:23:35,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 524. [2022-11-23 14:23:35,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 391 states have (on average 1.3375959079283888) internal successors, (523), 396 states have internal predecessors, (523), 83 states have call successors, (83), 50 states have call predecessors, (83), 48 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-11-23 14:23:35,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 685 transitions. [2022-11-23 14:23:35,880 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 685 transitions. Word has length 53 [2022-11-23 14:23:35,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:23:35,881 INFO L495 AbstractCegarLoop]: Abstraction has 524 states and 685 transitions. [2022-11-23 14:23:35,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:23:35,881 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 685 transitions. [2022-11-23 14:23:35,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-23 14:23:35,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:23:35,882 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:23:35,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 14:23:35,883 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:23:35,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:23:35,883 INFO L85 PathProgramCache]: Analyzing trace with hash -346828501, now seen corresponding path program 1 times [2022-11-23 14:23:35,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:23:35,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36619055] [2022-11-23 14:23:35,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:23:35,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:23:35,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:23:35,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:23:35,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:23:35,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36619055] [2022-11-23 14:23:35,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36619055] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:23:35,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:23:35,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:23:35,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926166995] [2022-11-23 14:23:35,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:23:35,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:23:35,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:23:35,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:23:35,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:23:35,971 INFO L87 Difference]: Start difference. First operand 524 states and 685 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-23 14:23:36,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:23:36,358 INFO L93 Difference]: Finished difference Result 627 states and 801 transitions. [2022-11-23 14:23:36,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:23:36,358 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2022-11-23 14:23:36,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:23:36,361 INFO L225 Difference]: With dead ends: 627 [2022-11-23 14:23:36,362 INFO L226 Difference]: Without dead ends: 624 [2022-11-23 14:23:36,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:23:36,363 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 673 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:23:36,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 386 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:23:36,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-11-23 14:23:36,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 523. [2022-11-23 14:23:36,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 391 states have (on average 1.329923273657289) internal successors, (520), 395 states have internal predecessors, (520), 82 states have call successors, (82), 50 states have call predecessors, (82), 48 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-11-23 14:23:36,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 681 transitions. [2022-11-23 14:23:36,449 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 681 transitions. Word has length 54 [2022-11-23 14:23:36,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:23:36,450 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 681 transitions. [2022-11-23 14:23:36,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-23 14:23:36,451 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 681 transitions. [2022-11-23 14:23:36,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-23 14:23:36,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:23:36,452 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:23:36,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 14:23:36,453 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:23:36,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:23:36,453 INFO L85 PathProgramCache]: Analyzing trace with hash 2131683443, now seen corresponding path program 1 times [2022-11-23 14:23:36,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:23:36,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150924904] [2022-11-23 14:23:36,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:23:36,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:23:36,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:23:36,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:23:36,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:23:36,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150924904] [2022-11-23 14:23:36,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150924904] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:23:36,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092103983] [2022-11-23 14:23:36,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:23:36,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:23:36,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:23:36,662 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:23:36,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:23:36,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:23:36,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:23:36,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:23:37,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:23:37,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:23:37,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:23:37,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092103983] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:23:37,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1056815430] [2022-11-23 14:23:37,431 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-23 14:23:37,431 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:23:37,435 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:23:37,440 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:23:37,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:23:45,715 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 215 for LOIs [2022-11-23 14:23:45,772 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 183 for LOIs [2022-11-23 14:23:45,814 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 211 for LOIs [2022-11-23 14:23:45,894 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 219 for LOIs [2022-11-23 14:23:46,903 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 215 for LOIs [2022-11-23 14:23:47,027 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 215 for LOIs [2022-11-23 14:23:47,129 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 215 for LOIs [2022-11-23 14:23:47,181 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 222 for LOIs [2022-11-23 14:23:47,244 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:24:22,951 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12910#(and (= ~E_12~0 2) (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~T11_E~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_13~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~t13_st~0 0) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~E_11~0 2) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~t11_pc~0 0) (= ~p_dw_pc~0 1) (= ~T12_E~0 2) (= ~t11_i~0 0) (= ~T13_E~0 2) (= ~t12_pc~0 0) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~t12_i~0 0) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~t13_i~0 0) (= ~token~0 0) (= ~c_dr_pc~0 0) (= 2 ~p_dw_st~0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= ~t12_st~0 0) (= 0 ~t4_pc~0) (= ~t13_pc~0 0) (= ~t11_st~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~E_9~0 2) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-23 14:24:22,951 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:24:22,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:24:22,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-23 14:24:22,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14002658] [2022-11-23 14:24:22,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:24:22,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:24:22,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:24:22,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:24:22,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-11-23 14:24:22,954 INFO L87 Difference]: Start difference. First operand 523 states and 681 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-23 14:24:23,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:24:23,732 INFO L93 Difference]: Finished difference Result 1096 states and 1336 transitions. [2022-11-23 14:24:23,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:24:23,733 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 55 [2022-11-23 14:24:23,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:24:23,741 INFO L225 Difference]: With dead ends: 1096 [2022-11-23 14:24:23,742 INFO L226 Difference]: Without dead ends: 1093 [2022-11-23 14:24:23,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 35.7s TimeCoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-11-23 14:24:23,745 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 630 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:24:23,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [630 Valid, 1211 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 14:24:23,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2022-11-23 14:24:23,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 818. [2022-11-23 14:24:23,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 596 states have (on average 1.2802013422818792) internal successors, (763), 600 states have internal predecessors, (763), 130 states have call successors, (130), 92 states have call predecessors, (130), 90 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2022-11-23 14:24:23,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1020 transitions. [2022-11-23 14:24:23,869 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1020 transitions. Word has length 55 [2022-11-23 14:24:23,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:24:23,869 INFO L495 AbstractCegarLoop]: Abstraction has 818 states and 1020 transitions. [2022-11-23 14:24:23,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-23 14:24:23,870 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1020 transitions. [2022-11-23 14:24:23,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-23 14:24:23,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:24:23,871 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:24:23,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 14:24:24,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 14:24:24,087 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:24:24,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:24:24,087 INFO L85 PathProgramCache]: Analyzing trace with hash -2127454805, now seen corresponding path program 2 times [2022-11-23 14:24:24,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:24:24,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355744443] [2022-11-23 14:24:24,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:24,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:24:24,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:24:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:24:24,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:24:24,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355744443] [2022-11-23 14:24:24,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355744443] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:24:24,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:24:24,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:24:24,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250442392] [2022-11-23 14:24:24,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:24:24,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:24:24,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:24:24,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:24:24,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:24:24,135 INFO L87 Difference]: Start difference. First operand 818 states and 1020 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-23 14:24:24,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:24:24,369 INFO L93 Difference]: Finished difference Result 1231 states and 1493 transitions. [2022-11-23 14:24:24,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:24:24,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 58 [2022-11-23 14:24:24,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:24:24,375 INFO L225 Difference]: With dead ends: 1231 [2022-11-23 14:24:24,375 INFO L226 Difference]: Without dead ends: 820 [2022-11-23 14:24:24,377 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 [2022-11-23 14:24:24,378 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 375 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:24:24,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 443 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:24:24,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2022-11-23 14:24:24,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 814. [2022-11-23 14:24:24,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 592 states have (on average 1.2685810810810811) internal successors, (751), 596 states have internal predecessors, (751), 130 states have call successors, (130), 92 states have call predecessors, (130), 90 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2022-11-23 14:24:24,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1008 transitions. [2022-11-23 14:24:24,480 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1008 transitions. Word has length 58 [2022-11-23 14:24:24,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:24:24,480 INFO L495 AbstractCegarLoop]: Abstraction has 814 states and 1008 transitions. [2022-11-23 14:24:24,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-23 14:24:24,481 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1008 transitions. [2022-11-23 14:24:24,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-23 14:24:24,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:24:24,482 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 14:24:24,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 14:24:24,483 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:24:24,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:24:24,483 INFO L85 PathProgramCache]: Analyzing trace with hash -182434709, now seen corresponding path program 1 times [2022-11-23 14:24:24,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:24:24,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506494515] [2022-11-23 14:24:24,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:24,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:24:24,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:24:24,537 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:24:24,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:24:24,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506494515] [2022-11-23 14:24:24,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506494515] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:24:24,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:24:24,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:24:24,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366028939] [2022-11-23 14:24:24,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:24:24,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:24:24,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:24:24,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:24:24,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:24:24,540 INFO L87 Difference]: Start difference. First operand 814 states and 1008 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 14:24:24,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:24:24,805 INFO L93 Difference]: Finished difference Result 1433 states and 1718 transitions. [2022-11-23 14:24:24,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:24:24,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2022-11-23 14:24:24,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:24:24,812 INFO L225 Difference]: With dead ends: 1433 [2022-11-23 14:24:24,812 INFO L226 Difference]: Without dead ends: 1070 [2022-11-23 14:24:24,814 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 [2022-11-23 14:24:24,816 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 42 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:24:24,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 700 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:24:24,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2022-11-23 14:24:24,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 889. [2022-11-23 14:24:24,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 653 states have (on average 1.2649310872894335) internal successors, (826), 657 states have internal predecessors, (826), 137 states have call successors, (137), 99 states have call predecessors, (137), 97 states have return successors, (134), 134 states have call predecessors, (134), 134 states have call successors, (134) [2022-11-23 14:24:24,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1097 transitions. [2022-11-23 14:24:24,927 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1097 transitions. Word has length 61 [2022-11-23 14:24:24,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:24:24,927 INFO L495 AbstractCegarLoop]: Abstraction has 889 states and 1097 transitions. [2022-11-23 14:24:24,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 14:24:24,928 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1097 transitions. [2022-11-23 14:24:24,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-23 14:24:24,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:24:24,929 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:24:24,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 14:24:24,930 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:24:24,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:24:24,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1543423458, now seen corresponding path program 1 times [2022-11-23 14:24:24,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:24:24,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058023688] [2022-11-23 14:24:24,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:24,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:24:24,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:24:25,130 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 14:24:25,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:24:25,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058023688] [2022-11-23 14:24:25,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058023688] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:24:25,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:24:25,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 14:24:25,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544055701] [2022-11-23 14:24:25,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:24:25,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:24:25,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:24:25,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:24:25,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:24:25,133 INFO L87 Difference]: Start difference. First operand 889 states and 1097 transitions. Second operand has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 14:24:26,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:24:26,261 INFO L93 Difference]: Finished difference Result 1938 states and 2280 transitions. [2022-11-23 14:24:26,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 14:24:26,262 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 70 [2022-11-23 14:24:26,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:24:26,268 INFO L225 Difference]: With dead ends: 1938 [2022-11-23 14:24:26,268 INFO L226 Difference]: Without dead ends: 1257 [2022-11-23 14:24:26,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-23 14:24:26,271 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 548 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:24:26,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [579 Valid, 1013 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1058 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 14:24:26,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2022-11-23 14:24:26,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 1208. [2022-11-23 14:24:26,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 867 states have (on average 1.2249134948096885) internal successors, (1062), 871 states have internal predecessors, (1062), 193 states have call successors, (193), 148 states have call predecessors, (193), 146 states have return successors, (190), 190 states have call predecessors, (190), 190 states have call successors, (190) [2022-11-23 14:24:26,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1445 transitions. [2022-11-23 14:24:26,438 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1445 transitions. Word has length 70 [2022-11-23 14:24:26,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:24:26,439 INFO L495 AbstractCegarLoop]: Abstraction has 1208 states and 1445 transitions. [2022-11-23 14:24:26,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 14:24:26,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1445 transitions. [2022-11-23 14:24:26,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-23 14:24:26,441 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:24:26,441 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:24:26,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 14:24:26,442 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:24:26,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:24:26,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1606204126, now seen corresponding path program 1 times [2022-11-23 14:24:26,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:24:26,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452636425] [2022-11-23 14:24:26,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:26,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:24:26,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:24:26,494 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 14:24:26,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:24:26,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452636425] [2022-11-23 14:24:26,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452636425] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:24:26,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:24:26,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:24:26,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934858855] [2022-11-23 14:24:26,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:24:26,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:24:26,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:24:26,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:24:26,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:24:26,496 INFO L87 Difference]: Start difference. First operand 1208 states and 1445 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 14:24:26,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:24:26,811 INFO L93 Difference]: Finished difference Result 2174 states and 2539 transitions. [2022-11-23 14:24:26,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:24:26,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2022-11-23 14:24:26,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:24:26,819 INFO L225 Difference]: With dead ends: 2174 [2022-11-23 14:24:26,819 INFO L226 Difference]: Without dead ends: 1384 [2022-11-23 14:24:26,821 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 [2022-11-23 14:24:26,822 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 37 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:24:26,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 694 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:24:26,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2022-11-23 14:24:26,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1255. [2022-11-23 14:24:26,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 906 states have (on average 1.2229580573951435) internal successors, (1108), 910 states have internal predecessors, (1108), 197 states have call successors, (197), 152 states have call predecessors, (197), 150 states have return successors, (194), 194 states have call predecessors, (194), 194 states have call successors, (194) [2022-11-23 14:24:26,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 1499 transitions. [2022-11-23 14:24:26,994 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 1499 transitions. Word has length 71 [2022-11-23 14:24:26,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:24:26,995 INFO L495 AbstractCegarLoop]: Abstraction has 1255 states and 1499 transitions. [2022-11-23 14:24:26,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 14:24:26,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 1499 transitions. [2022-11-23 14:24:26,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-23 14:24:26,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:24:26,998 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:24:26,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 14:24:26,999 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:24:26,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:24:26,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1370684203, now seen corresponding path program 1 times [2022-11-23 14:24:27,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:24:27,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102106661] [2022-11-23 14:24:27,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:27,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:24:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:24:27,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:24:27,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:24:27,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102106661] [2022-11-23 14:24:27,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102106661] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:24:27,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:24:27,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:24:27,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514334929] [2022-11-23 14:24:27,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:24:27,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:24:27,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:24:27,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:24:27,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:24:27,166 INFO L87 Difference]: Start difference. First operand 1255 states and 1499 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:24:28,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:24:28,531 INFO L93 Difference]: Finished difference Result 2198 states and 3071 transitions. [2022-11-23 14:24:28,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:24:28,532 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 71 [2022-11-23 14:24:28,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:24:28,540 INFO L225 Difference]: With dead ends: 2198 [2022-11-23 14:24:28,541 INFO L226 Difference]: Without dead ends: 2001 [2022-11-23 14:24:28,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:24:28,544 INFO L413 NwaCegarLoop]: 658 mSDtfsCounter, 1553 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1571 SdHoareTripleChecker+Valid, 1577 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:24:28,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1571 Valid, 1577 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 14:24:28,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2001 states. [2022-11-23 14:24:28,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2001 to 1988. [2022-11-23 14:24:28,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1526 states have (on average 1.3499344692005242) internal successors, (2060), 1533 states have internal predecessors, (2060), 286 states have call successors, (286), 176 states have call predecessors, (286), 174 states have return successors, (349), 280 states have call predecessors, (349), 283 states have call successors, (349) [2022-11-23 14:24:28,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 2695 transitions. [2022-11-23 14:24:28,856 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 2695 transitions. Word has length 71 [2022-11-23 14:24:28,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:24:28,856 INFO L495 AbstractCegarLoop]: Abstraction has 1988 states and 2695 transitions. [2022-11-23 14:24:28,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:24:28,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 2695 transitions. [2022-11-23 14:24:28,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-23 14:24:28,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:24:28,861 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:24:28,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 14:24:28,862 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:24:28,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:24:28,864 INFO L85 PathProgramCache]: Analyzing trace with hash -564405114, now seen corresponding path program 1 times [2022-11-23 14:24:28,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:24:28,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944938094] [2022-11-23 14:24:28,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:28,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:24:28,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:24:29,293 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-23 14:24:29,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:24:29,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944938094] [2022-11-23 14:24:29,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944938094] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:24:29,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843981605] [2022-11-23 14:24:29,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:29,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:24:29,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:24:29,299 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:24:29,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:24:29,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:24:29,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 14:24:29,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:24:29,542 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:24:29,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:24:29,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843981605] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:24:29,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:24:29,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-11-23 14:24:29,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644017155] [2022-11-23 14:24:29,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:24:29,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:24:29,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:24:29,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:24:29,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-23 14:24:29,545 INFO L87 Difference]: Start difference. First operand 1988 states and 2695 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 14:24:30,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:24:30,106 INFO L93 Difference]: Finished difference Result 2852 states and 3700 transitions. [2022-11-23 14:24:30,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:24:30,107 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-11-23 14:24:30,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:24:30,115 INFO L225 Difference]: With dead ends: 2852 [2022-11-23 14:24:30,116 INFO L226 Difference]: Without dead ends: 1805 [2022-11-23 14:24:30,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-23 14:24:30,120 INFO L413 NwaCegarLoop]: 379 mSDtfsCounter, 370 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 1429 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:24:30,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 1429 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:24:30,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2022-11-23 14:24:30,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 1620. [2022-11-23 14:24:30,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1289 states have (on average 1.3886733902249806) internal successors, (1790), 1296 states have internal predecessors, (1790), 215 states have call successors, (215), 116 states have call predecessors, (215), 114 states have return successors, (278), 209 states have call predecessors, (278), 212 states have call successors, (278) [2022-11-23 14:24:30,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 2283 transitions. [2022-11-23 14:24:30,394 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 2283 transitions. Word has length 102 [2022-11-23 14:24:30,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:24:30,394 INFO L495 AbstractCegarLoop]: Abstraction has 1620 states and 2283 transitions. [2022-11-23 14:24:30,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 14:24:30,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 2283 transitions. [2022-11-23 14:24:30,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-23 14:24:30,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:24:30,398 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:24:30,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-23 14:24:30,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 14:24:30,604 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:24:30,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:24:30,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1286120463, now seen corresponding path program 1 times [2022-11-23 14:24:30,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:24:30,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787873870] [2022-11-23 14:24:30,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:30,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:24:30,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:24:30,843 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-23 14:24:30,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:24:30,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787873870] [2022-11-23 14:24:30,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787873870] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:24:30,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033450512] [2022-11-23 14:24:30,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:30,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:24:30,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:24:30,845 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:24:30,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:24:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:24:31,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 14:24:31,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:24:31,144 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 14:24:31,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:24:31,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033450512] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:24:31,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:24:31,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-23 14:24:31,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004405146] [2022-11-23 14:24:31,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:24:31,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:24:31,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:24:31,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:24:31,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:24:31,148 INFO L87 Difference]: Start difference. First operand 1620 states and 2283 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 14:24:31,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:24:31,780 INFO L93 Difference]: Finished difference Result 2169 states and 2908 transitions. [2022-11-23 14:24:31,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:24:31,781 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2022-11-23 14:24:31,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:24:31,788 INFO L225 Difference]: With dead ends: 2169 [2022-11-23 14:24:31,788 INFO L226 Difference]: Without dead ends: 1576 [2022-11-23 14:24:31,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-23 14:24:31,791 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 67 mSDsluCounter, 1420 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1797 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:24:31,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 1797 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:24:31,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2022-11-23 14:24:31,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1484. [2022-11-23 14:24:31,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1189 states have (on average 1.4070647603027755) internal successors, (1673), 1196 states have internal predecessors, (1673), 196 states have call successors, (196), 99 states have call predecessors, (196), 97 states have return successors, (259), 190 states have call predecessors, (259), 193 states have call successors, (259) [2022-11-23 14:24:32,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 2128 transitions. [2022-11-23 14:24:32,005 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 2128 transitions. Word has length 112 [2022-11-23 14:24:32,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:24:32,005 INFO L495 AbstractCegarLoop]: Abstraction has 1484 states and 2128 transitions. [2022-11-23 14:24:32,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 14:24:32,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 2128 transitions. [2022-11-23 14:24:32,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-23 14:24:32,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:24:32,012 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:24:32,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:24:32,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:24:32,218 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:24:32,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:24:32,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1216054669, now seen corresponding path program 1 times [2022-11-23 14:24:32,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:24:32,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083655896] [2022-11-23 14:24:32,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:32,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:24:32,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:24:32,408 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-23 14:24:32,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:24:32,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083655896] [2022-11-23 14:24:32,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083655896] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:24:32,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965357663] [2022-11-23 14:24:32,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:32,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:24:32,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:24:32,411 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:24:32,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:24:32,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:24:32,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 14:24:32,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:24:32,677 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:24:32,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:24:32,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965357663] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:24:32,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:24:32,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-11-23 14:24:32,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702249578] [2022-11-23 14:24:32,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:24:32,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:24:32,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:24:32,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:24:32,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:24:32,680 INFO L87 Difference]: Start difference. First operand 1484 states and 2128 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 14:24:33,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:24:33,205 INFO L93 Difference]: Finished difference Result 2233 states and 2973 transitions. [2022-11-23 14:24:33,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:24:33,206 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2022-11-23 14:24:33,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:24:33,215 INFO L225 Difference]: With dead ends: 2233 [2022-11-23 14:24:33,215 INFO L226 Difference]: Without dead ends: 1776 [2022-11-23 14:24:33,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-23 14:24:33,219 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 355 mSDsluCounter, 1156 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 1522 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:24:33,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 1522 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:24:33,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1776 states. [2022-11-23 14:24:33,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1776 to 1742. [2022-11-23 14:24:33,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1742 states, 1351 states have (on average 1.3715766099185789) internal successors, (1853), 1364 states have internal predecessors, (1853), 244 states have call successors, (244), 141 states have call predecessors, (244), 145 states have return successors, (319), 238 states have call predecessors, (319), 241 states have call successors, (319) [2022-11-23 14:24:33,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1742 states to 1742 states and 2416 transitions. [2022-11-23 14:24:33,471 INFO L78 Accepts]: Start accepts. Automaton has 1742 states and 2416 transitions. Word has length 113 [2022-11-23 14:24:33,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:24:33,472 INFO L495 AbstractCegarLoop]: Abstraction has 1742 states and 2416 transitions. [2022-11-23 14:24:33,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 14:24:33,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1742 states and 2416 transitions. [2022-11-23 14:24:33,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-23 14:24:33,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:24:33,475 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:24:33,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:24:33,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 14:24:33,683 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:24:33,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:24:33,683 INFO L85 PathProgramCache]: Analyzing trace with hash 704713102, now seen corresponding path program 1 times [2022-11-23 14:24:33,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:24:33,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231731483] [2022-11-23 14:24:33,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:33,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:24:33,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:24:34,727 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:24:34,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:24:34,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231731483] [2022-11-23 14:24:34,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231731483] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:24:34,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945259027] [2022-11-23 14:24:34,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:34,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:24:34,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:24:34,730 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:24:34,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:24:34,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:24:34,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-23 14:24:34,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:24:36,072 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:24:36,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:24:38,331 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 14:24:38,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945259027] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:24:38,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [608780682] [2022-11-23 14:24:38,335 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-23 14:24:38,335 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:24:38,336 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:24:38,336 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:24:38,336 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:26:29,509 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 392 for LOIs [2022-11-23 14:26:30,696 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 343 for LOIs [2022-11-23 14:26:30,864 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 334 for LOIs [2022-11-23 14:26:31,044 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 404 for LOIs [2022-11-23 14:26:36,167 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 222 for LOIs [2022-11-23 14:26:36,839 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 168 for LOIs [2022-11-23 14:26:37,434 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 396 for LOIs [2022-11-23 14:26:39,536 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 419 for LOIs [2022-11-23 14:26:40,884 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:27:49,222 WARN L233 SmtUtils]: Spent 8.06s on a formula simplification. DAG size of input: 368 DAG size of output: 284 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:27:59,973 WARN L233 SmtUtils]: Spent 8.04s on a formula simplification. DAG size of input: 374 DAG size of output: 287 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:28:08,456 WARN L233 SmtUtils]: Spent 7.93s on a formula simplification. DAG size of input: 380 DAG size of output: 293 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:28:16,867 WARN L233 SmtUtils]: Spent 7.87s on a formula simplification. DAG size of input: 382 DAG size of output: 295 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:28:54,697 WARN L233 SmtUtils]: Spent 8.02s on a formula simplification. DAG size of input: 384 DAG size of output: 297 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:28:57,708 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '56812#(and (<= 0 ~t5_pc~0) (<= 0 ~t6_i~0) (<= ~t5_st~0 0) (<= 2 ~T6_E~0) (<= 0 |#NULL.base|) (<= ~T13_E~0 2) (<= ~T5_E~0 2) (<= 2 ~T4_E~0) (<= 0 ~t13_i~0) (= ~t10_i~0 0) (<= 1 ~c_dr_i~0) (<= 0 ~t3_i~0) (<= 2 ~E_13~0) (= ~t7_i~0 0) (<= 0 ~t5_st~0) (<= ~t12_i~0 0) (<= ~T6_E~0 2) (<= 2 ~T10_E~0) (<= 0 ~t8_pc~0) (<= ~E_3~0 2) (<= ~t4_st~0 0) (<= 2 ~E_11~0) (<= 0 ~c_dr_pc~0) (<= 0 ~t1_i~0) (<= 0 ~p_dw_st~0) (<= 0 ~t6_st~0) (<= 0 ~local~0) (<= 2 ~E_M~0) (= ~T1_E~0 2) (<= 0 ~t2_pc~0) (<= ~c_dr_i~0 1) (<= 0 ~t11_pc~0) (<= 0 ~t12_i~0) (<= ~T10_E~0 2) (<= 2 ~T3_E~0) (<= 0 ~p_dw_pc~0) (<= ~t2_st~0 0) (= ~q_free~0 1) (<= 1 ~q_req_up~0) (<= 0 ~t12_st~0) (<= ~E_2~0 2) (<= 0 ~p_num_write~0) (<= 2 ~T11_E~0) (<= ~t11_st~0 0) (<= ~token~0 0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (<= ~p_dw_st~0 2) (<= ~t6_pc~0 0) (<= 2 ~E_12~0) (<= 0 ~t7_st~0) (<= ~T7_E~0 2) (<= ~t11_pc~0 0) (<= ~t7_pc~0 0) (<= 0 ~t12_pc~0) (<= 0 ~t13_st~0) (<= ~t1_pc~0 0) (<= ~T4_E~0 2) (<= ~t8_i~0 0) (<= 2 ~M_E~0) (<= ~T9_E~0 2) (= ~t9_i~0 0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (<= 2 ~T13_E~0) (<= 0 ~t9_st~0) (<= 0 ~t10_st~0) (<= ~t5_i~0 0) (<= 2 ~E_2~0) (<= 2 ~T8_E~0) (<= ~T11_E~0 2) (<= 0 ~t11_st~0) (<= ~t13_pc~0 0) (<= 0 ~t13_pc~0) (<= 1 ~c_dr_st~0) (<= 2 ~E_9~0) (<= ~local~0 0) (<= ~t12_st~0 0) (<= 2 ~E_6~0) (= ~m_i~0 0) (<= ~t2_i~0 0) (<= 2 ~E_8~0) (<= ~t8_st~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~T3_E~0 2) (<= ~E_4~0 2) (<= 2 ~E_7~0) (<= 2 ~E_3~0) (<= ~t10_pc~0 0) (<= ~t9_pc~0 0) (<= 0 ~t5_i~0) (<= 0 ~t8_st~0) (<= ~E_12~0 2) (<= ~t9_st~0 0) (<= ~q_req_up~0 1) (<= ~T8_E~0 2) (<= ~E_6~0 2) (<= ~E_10~0 2) (<= 0 ~token~0) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (<= 0 ~t6_pc~0) (<= |#NULL.base| 0) (<= 0 ~t3_st~0) (<= ~E_13~0 2) (<= ~m_pc~0 0) (<= ~t1_i~0 0) (<= 0 ~t10_pc~0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (<= 2 ~T7_E~0) (<= 2 ~E_10~0) (<= ~M_E~0 2) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= ~c_dr_st~0 1) (<= 2 ~T9_E~0) (<= ~t3_i~0 0) (<= 0 ~t2_st~0) (<= 0 ~t3_pc~0) (<= 0 ~t7_pc~0) (<= 0 ~t11_i~0) (<= ~t7_st~0 0) (<= 2 ~T12_E~0) (<= ~E_8~0 2) (<= 0 ~t9_pc~0) (<= ~t5_pc~0 0) (<= 2 ~E_5~0) (<= ~t6_i~0 0) (<= 0 ~t8_i~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (<= ~t12_pc~0 0) (<= 2 ~T5_E~0) (<= ~t13_st~0 0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (<= ~t2_pc~0 0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (<= ~E_M~0 2) (<= ~E_11~0 2) (<= ~t11_i~0 0) (<= ~t6_st~0 0) (<= 0 ~t1_st~0) (<= ~E_7~0 2) (<= ~t8_pc~0 0) (<= ~t10_st~0 0) (<= ~E_9~0 2) (<= 0 ~t1_pc~0) (<= 0 ~t4_st~0) (<= ~T12_E~0 2) (<= ~t13_i~0 0))' at error location [2022-11-23 14:28:57,708 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:28:57,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:28:57,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 16] total 49 [2022-11-23 14:28:57,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751183221] [2022-11-23 14:28:57,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:28:57,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-23 14:28:57,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:28:57,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-23 14:28:57,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=770, Invalid=10150, Unknown=0, NotChecked=0, Total=10920 [2022-11-23 14:28:57,714 INFO L87 Difference]: Start difference. First operand 1742 states and 2416 transitions. Second operand has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) [2022-11-23 14:29:24,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:29:24,094 INFO L93 Difference]: Finished difference Result 4032 states and 5070 transitions. [2022-11-23 14:29:24,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2022-11-23 14:29:24,095 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) Word has length 114 [2022-11-23 14:29:24,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:29:24,109 INFO L225 Difference]: With dead ends: 4032 [2022-11-23 14:29:24,110 INFO L226 Difference]: Without dead ends: 3317 [2022-11-23 14:29:24,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 288 SyntacticMatches, 6 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40605 ImplicationChecksByTransitivity, 157.6s TimeCoverageRelationStatistics Valid=9166, Invalid=89744, Unknown=0, NotChecked=0, Total=98910 [2022-11-23 14:29:24,130 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 6593 mSDsluCounter, 2781 mSDsCounter, 0 mSdLazyCounter, 7019 mSolverCounterSat, 3076 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6595 SdHoareTripleChecker+Valid, 3056 SdHoareTripleChecker+Invalid, 10095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3076 IncrementalHoareTripleChecker+Valid, 7019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:29:24,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6595 Valid, 3056 Invalid, 10095 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3076 Valid, 7019 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-23 14:29:24,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3317 states. [2022-11-23 14:29:24,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3317 to 2018. [2022-11-23 14:29:24,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 1535 states have (on average 1.3446254071661239) internal successors, (2064), 1550 states have internal predecessors, (2064), 289 states have call successors, (289), 178 states have call predecessors, (289), 192 states have return successors, (376), 291 states have call predecessors, (376), 286 states have call successors, (376) [2022-11-23 14:29:24,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 2729 transitions. [2022-11-23 14:29:24,571 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 2729 transitions. Word has length 114 [2022-11-23 14:29:24,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:29:24,572 INFO L495 AbstractCegarLoop]: Abstraction has 2018 states and 2729 transitions. [2022-11-23 14:29:24,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) [2022-11-23 14:29:24,572 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 2729 transitions. [2022-11-23 14:29:24,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-23 14:29:24,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:29:24,576 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:29:24,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:29:24,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 14:29:24,783 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:29:24,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:29:24,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1854683568, now seen corresponding path program 1 times [2022-11-23 14:29:24,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:29:24,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526905833] [2022-11-23 14:29:24,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:24,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:29:24,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:25,260 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:29:25,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:29:25,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526905833] [2022-11-23 14:29:25,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526905833] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:29:25,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828780689] [2022-11-23 14:29:25,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:25,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:29:25,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:29:25,263 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:29:25,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:29:25,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:25,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 14:29:25,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:29:25,535 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 14:29:25,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:29:25,758 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 14:29:25,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828780689] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 14:29:25,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:29:25,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-11-23 14:29:25,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636226531] [2022-11-23 14:29:25,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:29:25,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:29:25,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:29:25,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:29:25,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-23 14:29:25,760 INFO L87 Difference]: Start difference. First operand 2018 states and 2729 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 14:29:27,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:29:27,018 INFO L93 Difference]: Finished difference Result 3342 states and 4277 transitions. [2022-11-23 14:29:27,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 14:29:27,019 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2022-11-23 14:29:27,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:29:27,031 INFO L225 Difference]: With dead ends: 3342 [2022-11-23 14:29:27,031 INFO L226 Difference]: Without dead ends: 2351 [2022-11-23 14:29:27,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-11-23 14:29:27,035 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 574 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:29:27,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [578 Valid, 616 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 14:29:27,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2022-11-23 14:29:27,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 2098. [2022-11-23 14:29:27,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2098 states, 1580 states have (on average 1.3386075949367089) internal successors, (2115), 1598 states have internal predecessors, (2115), 308 states have call successors, (308), 187 states have call predecessors, (308), 208 states have return successors, (416), 314 states have call predecessors, (416), 305 states have call successors, (416) [2022-11-23 14:29:27,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 2839 transitions. [2022-11-23 14:29:27,558 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 2839 transitions. Word has length 115 [2022-11-23 14:29:27,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:29:27,559 INFO L495 AbstractCegarLoop]: Abstraction has 2098 states and 2839 transitions. [2022-11-23 14:29:27,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 14:29:27,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 2839 transitions. [2022-11-23 14:29:27,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-23 14:29:27,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:29:27,564 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:29:27,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:29:27,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:29:27,771 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:29:27,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:29:27,772 INFO L85 PathProgramCache]: Analyzing trace with hash -388680401, now seen corresponding path program 1 times [2022-11-23 14:29:27,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:29:27,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847912383] [2022-11-23 14:29:27,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:27,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:29:27,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:28,634 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 19 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:29:28,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:29:28,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847912383] [2022-11-23 14:29:28,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847912383] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:29:28,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62997669] [2022-11-23 14:29:28,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:28,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:29:28,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:29:28,636 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:29:28,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 14:29:28,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:28,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-23 14:29:28,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:29:29,827 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:29:29,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:29:31,824 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 14:29:31,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62997669] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:29:31,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1095156546] [2022-11-23 14:29:31,828 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-23 14:29:31,828 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:29:31,828 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:29:31,829 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:29:31,829 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:30:05,351 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 392 for LOIs [2022-11-23 14:30:06,546 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 182 for LOIs [2022-11-23 14:30:06,564 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 170 for LOIs [2022-11-23 14:30:06,584 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 404 for LOIs [2022-11-23 14:30:11,589 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 222 for LOIs [2022-11-23 14:30:12,214 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 170 for LOIs [2022-11-23 14:30:12,819 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 396 for LOIs [2022-11-23 14:30:14,304 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 419 for LOIs [2022-11-23 14:30:16,191 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:32:08,482 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '75441#(and (= ~E_12~0 2) (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~T11_E~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_13~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~t13_st~0 0) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~c_dr_pc~0 1) (= ~E_11~0 2) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~t11_pc~0 0) (= ~T12_E~0 2) (= ~t11_i~0 0) (= ~T13_E~0 2) (= ~t12_pc~0 0) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~t12_i~0 0) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~t13_i~0 0) (= ~token~0 0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= 0 ~t2_st~0) (= ~t12_st~0 0) (= 0 ~t4_pc~0) (= ~t13_pc~0 0) (= ~t11_st~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~E_9~0 2) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-23 14:32:08,482 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:32:08,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:32:08,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 49 [2022-11-23 14:32:08,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312158159] [2022-11-23 14:32:08,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:32:08,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-23 14:32:08,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:32:08,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-23 14:32:08,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=870, Invalid=10050, Unknown=0, NotChecked=0, Total=10920 [2022-11-23 14:32:08,486 INFO L87 Difference]: Start difference. First operand 2098 states and 2839 transitions. Second operand has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) [2022-11-23 14:32:19,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:32:19,776 INFO L93 Difference]: Finished difference Result 4947 states and 6181 transitions. [2022-11-23 14:32:19,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-23 14:32:19,777 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) Word has length 124 [2022-11-23 14:32:19,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:32:19,793 INFO L225 Difference]: With dead ends: 4947 [2022-11-23 14:32:19,793 INFO L226 Difference]: Without dead ends: 3876 [2022-11-23 14:32:19,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 312 SyntacticMatches, 5 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14493 ImplicationChecksByTransitivity, 119.1s TimeCoverageRelationStatistics Valid=3638, Invalid=31518, Unknown=0, NotChecked=0, Total=35156 [2022-11-23 14:32:19,800 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 4664 mSDsluCounter, 2543 mSDsCounter, 0 mSdLazyCounter, 5801 mSolverCounterSat, 2217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4665 SdHoareTripleChecker+Valid, 2793 SdHoareTripleChecker+Invalid, 8018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2217 IncrementalHoareTripleChecker+Valid, 5801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:32:19,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4665 Valid, 2793 Invalid, 8018 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2217 Valid, 5801 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-23 14:32:19,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3876 states. [2022-11-23 14:32:20,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3876 to 2635. [2022-11-23 14:32:20,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 1966 states have (on average 1.3041709053916581) internal successors, (2564), 1984 states have internal predecessors, (2564), 382 states have call successors, (382), 246 states have call predecessors, (382), 285 states have return successors, (508), 406 states have call predecessors, (508), 379 states have call successors, (508) [2022-11-23 14:32:20,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 3454 transitions. [2022-11-23 14:32:20,365 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 3454 transitions. Word has length 124 [2022-11-23 14:32:20,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:32:20,366 INFO L495 AbstractCegarLoop]: Abstraction has 2635 states and 3454 transitions. [2022-11-23 14:32:20,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) [2022-11-23 14:32:20,367 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 3454 transitions. [2022-11-23 14:32:20,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-23 14:32:20,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:32:20,370 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:32:20,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-23 14:32:20,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 14:32:20,577 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:32:20,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:32:20,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1025758795, now seen corresponding path program 1 times [2022-11-23 14:32:20,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:32:20,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062813152] [2022-11-23 14:32:20,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:20,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:32:20,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:20,835 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-23 14:32:20,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:32:20,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062813152] [2022-11-23 14:32:20,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062813152] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:32:20,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252212242] [2022-11-23 14:32:20,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:20,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:32:20,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:32:20,838 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:32:20,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 14:32:21,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:21,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 14:32:21,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:32:21,151 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-23 14:32:21,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:32:21,402 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 14:32:21,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252212242] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 14:32:21,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:32:21,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-11-23 14:32:21,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843325874] [2022-11-23 14:32:21,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:32:21,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:32:21,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:32:21,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:32:21,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-23 14:32:21,404 INFO L87 Difference]: Start difference. First operand 2635 states and 3454 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 14:32:22,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:32:22,844 INFO L93 Difference]: Finished difference Result 3594 states and 4545 transitions. [2022-11-23 14:32:22,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 14:32:22,845 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2022-11-23 14:32:22,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:32:22,854 INFO L225 Difference]: With dead ends: 3594 [2022-11-23 14:32:22,854 INFO L226 Difference]: Without dead ends: 1986 [2022-11-23 14:32:22,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-11-23 14:32:22,859 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 848 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:32:22,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [850 Valid, 885 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1174 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 14:32:22,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1986 states. [2022-11-23 14:32:23,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1986 to 1645. [2022-11-23 14:32:23,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1269 states have (on average 1.3727344365642238) internal successors, (1742), 1286 states have internal predecessors, (1742), 232 states have call successors, (232), 125 states have call predecessors, (232), 142 states have return successors, (325), 235 states have call predecessors, (325), 229 states have call successors, (325) [2022-11-23 14:32:23,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 2299 transitions. [2022-11-23 14:32:23,155 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 2299 transitions. Word has length 125 [2022-11-23 14:32:23,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:32:23,156 INFO L495 AbstractCegarLoop]: Abstraction has 1645 states and 2299 transitions. [2022-11-23 14:32:23,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 14:32:23,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 2299 transitions. [2022-11-23 14:32:23,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-23 14:32:23,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:32:23,161 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:32:23,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 14:32:23,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:32:23,367 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:32:23,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:32:23,368 INFO L85 PathProgramCache]: Analyzing trace with hash 696299415, now seen corresponding path program 1 times [2022-11-23 14:32:23,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:32:23,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479266076] [2022-11-23 14:32:23,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:23,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:32:23,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:23,528 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:32:23,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:32:23,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479266076] [2022-11-23 14:32:23,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479266076] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:32:23,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508328229] [2022-11-23 14:32:23,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:23,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:32:23,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:32:23,530 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:32:23,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 14:32:23,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:23,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 1129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:32:23,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:32:23,903 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:32:23,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:32:23,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508328229] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:32:23,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:32:23,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:32:23,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458151562] [2022-11-23 14:32:23,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:32:23,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:32:23,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:32:23,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:32:23,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:32:23,905 INFO L87 Difference]: Start difference. First operand 1645 states and 2299 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:32:24,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:32:24,559 INFO L93 Difference]: Finished difference Result 3489 states and 5408 transitions. [2022-11-23 14:32:24,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:32:24,559 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2022-11-23 14:32:24,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:32:24,571 INFO L225 Difference]: With dead ends: 3489 [2022-11-23 14:32:24,571 INFO L226 Difference]: Without dead ends: 2559 [2022-11-23 14:32:24,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:32:24,577 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 347 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:32:24,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 600 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:32:24,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2559 states. [2022-11-23 14:32:25,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2559 to 2550. [2022-11-23 14:32:25,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2037 states have (on average 1.432007854688267) internal successors, (2917), 2057 states have internal predecessors, (2917), 339 states have call successors, (339), 155 states have call predecessors, (339), 172 states have return successors, (494), 339 states have call predecessors, (494), 336 states have call successors, (494) [2022-11-23 14:32:25,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 3750 transitions. [2022-11-23 14:32:25,127 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 3750 transitions. Word has length 144 [2022-11-23 14:32:25,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:32:25,127 INFO L495 AbstractCegarLoop]: Abstraction has 2550 states and 3750 transitions. [2022-11-23 14:32:25,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:32:25,127 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 3750 transitions. [2022-11-23 14:32:25,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-23 14:32:25,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:32:25,133 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:32:25,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 14:32:25,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:32:25,348 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:32:25,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:32:25,348 INFO L85 PathProgramCache]: Analyzing trace with hash 93233749, now seen corresponding path program 1 times [2022-11-23 14:32:25,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:32:25,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293887444] [2022-11-23 14:32:25,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:25,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:32:25,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:25,494 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:32:25,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:32:25,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293887444] [2022-11-23 14:32:25,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293887444] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:32:25,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130509049] [2022-11-23 14:32:25,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:25,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:32:25,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:32:25,499 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:32:25,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 14:32:25,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:25,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 1123 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:32:25,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:32:25,817 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-23 14:32:25,817 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:32:25,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130509049] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:32:25,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:32:25,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:32:25,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209909566] [2022-11-23 14:32:25,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:32:25,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:32:25,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:32:25,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:32:25,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:32:25,820 INFO L87 Difference]: Start difference. First operand 2550 states and 3750 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:32:26,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:32:26,629 INFO L93 Difference]: Finished difference Result 6189 states and 9862 transitions. [2022-11-23 14:32:26,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:32:26,630 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2022-11-23 14:32:26,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:32:26,650 INFO L225 Difference]: With dead ends: 6189 [2022-11-23 14:32:26,650 INFO L226 Difference]: Without dead ends: 4354 [2022-11-23 14:32:26,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:32:26,661 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 368 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:32:26,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 600 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:32:26,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4354 states. [2022-11-23 14:32:27,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4354 to 4340. [2022-11-23 14:32:27,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4340 states, 3558 states have (on average 1.471894322653176) internal successors, (5237), 3584 states have internal predecessors, (5237), 548 states have call successors, (548), 215 states have call predecessors, (548), 232 states have return successors, (823), 542 states have call predecessors, (823), 545 states have call successors, (823) [2022-11-23 14:32:27,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4340 states to 4340 states and 6608 transitions. [2022-11-23 14:32:27,331 INFO L78 Accepts]: Start accepts. Automaton has 4340 states and 6608 transitions. Word has length 144 [2022-11-23 14:32:27,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:32:27,332 INFO L495 AbstractCegarLoop]: Abstraction has 4340 states and 6608 transitions. [2022-11-23 14:32:27,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:32:27,332 INFO L276 IsEmpty]: Start isEmpty. Operand 4340 states and 6608 transitions. [2022-11-23 14:32:27,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-23 14:32:27,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:32:27,340 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:32:27,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 14:32:27,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:32:27,548 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:32:27,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:32:27,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1699508823, now seen corresponding path program 1 times [2022-11-23 14:32:27,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:32:27,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314615860] [2022-11-23 14:32:27,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:27,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:32:27,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:27,687 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:32:27,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:32:27,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314615860] [2022-11-23 14:32:27,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314615860] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:32:27,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121475918] [2022-11-23 14:32:27,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:27,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:32:27,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:32:27,690 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:32:27,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 14:32:27,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:27,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 1117 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:32:27,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:32:27,986 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-23 14:32:27,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:32:27,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121475918] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:32:27,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:32:27,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:32:27,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075710897] [2022-11-23 14:32:27,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:32:27,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:32:27,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:32:27,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:32:27,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:32:27,988 INFO L87 Difference]: Start difference. First operand 4340 states and 6608 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:32:29,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:32:29,177 INFO L93 Difference]: Finished difference Result 11529 states and 18629 transitions. [2022-11-23 14:32:29,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:32:29,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2022-11-23 14:32:29,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:32:29,209 INFO L225 Difference]: With dead ends: 11529 [2022-11-23 14:32:29,210 INFO L226 Difference]: Without dead ends: 7904 [2022-11-23 14:32:29,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:32:29,229 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 371 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:32:29,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 600 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:32:29,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7904 states. [2022-11-23 14:32:30,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7904 to 7880. [2022-11-23 14:32:30,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7880 states, 6570 states have (on average 1.4942161339421614) internal successors, (9817), 6608 states have internal predecessors, (9817), 956 states have call successors, (956), 335 states have call predecessors, (956), 352 states have return successors, (1463), 938 states have call predecessors, (1463), 953 states have call successors, (1463) [2022-11-23 14:32:30,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7880 states to 7880 states and 12236 transitions. [2022-11-23 14:32:30,510 INFO L78 Accepts]: Start accepts. Automaton has 7880 states and 12236 transitions. Word has length 144 [2022-11-23 14:32:30,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:32:30,510 INFO L495 AbstractCegarLoop]: Abstraction has 7880 states and 12236 transitions. [2022-11-23 14:32:30,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:32:30,511 INFO L276 IsEmpty]: Start isEmpty. Operand 7880 states and 12236 transitions. [2022-11-23 14:32:30,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-23 14:32:30,527 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:32:30,527 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:32:30,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 14:32:30,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-23 14:32:30,735 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:32:30,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:32:30,735 INFO L85 PathProgramCache]: Analyzing trace with hash -285373675, now seen corresponding path program 1 times [2022-11-23 14:32:30,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:32:30,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231327632] [2022-11-23 14:32:30,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:30,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:32:30,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:30,876 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:32:30,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:32:30,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231327632] [2022-11-23 14:32:30,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231327632] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:32:30,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848275604] [2022-11-23 14:32:30,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:30,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:32:30,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:32:30,879 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:32:30,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 14:32:31,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:31,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 1111 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:32:31,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:32:31,251 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:32:31,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:32:31,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848275604] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:32:31,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:32:31,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:32:31,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361150354] [2022-11-23 14:32:31,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:32:31,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:32:31,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:32:31,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:32:31,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:32:31,256 INFO L87 Difference]: Start difference. First operand 7880 states and 12236 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:32:33,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:32:33,410 INFO L93 Difference]: Finished difference Result 22089 states and 35881 transitions. [2022-11-23 14:32:33,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:32:33,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2022-11-23 14:32:33,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:32:33,476 INFO L225 Difference]: With dead ends: 22089 [2022-11-23 14:32:33,476 INFO L226 Difference]: Without dead ends: 14924 [2022-11-23 14:32:33,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:32:33,504 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 341 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:32:33,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 600 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:32:33,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14924 states. [2022-11-23 14:32:35,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14924 to 14880. [2022-11-23 14:32:35,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14880 states, 12534 states have (on average 1.5044678474549227) internal successors, (18857), 12596 states have internal predecessors, (18857), 1752 states have call successors, (1752), 575 states have call predecessors, (1752), 592 states have return successors, (2707), 1710 states have call predecessors, (2707), 1749 states have call successors, (2707) [2022-11-23 14:32:35,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14880 states to 14880 states and 23316 transitions. [2022-11-23 14:32:35,596 INFO L78 Accepts]: Start accepts. Automaton has 14880 states and 23316 transitions. Word has length 144 [2022-11-23 14:32:35,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:32:35,596 INFO L495 AbstractCegarLoop]: Abstraction has 14880 states and 23316 transitions. [2022-11-23 14:32:35,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:32:35,597 INFO L276 IsEmpty]: Start isEmpty. Operand 14880 states and 23316 transitions. [2022-11-23 14:32:35,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-23 14:32:35,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:32:35,622 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:32:35,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-23 14:32:35,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-23 14:32:35,829 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:32:35,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:32:35,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1641028525, now seen corresponding path program 1 times [2022-11-23 14:32:35,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:32:35,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943029] [2022-11-23 14:32:35,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:35,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:32:35,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:35,977 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:32:35,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:32:35,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943029] [2022-11-23 14:32:35,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943029] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:32:35,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142804006] [2022-11-23 14:32:35,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:35,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:32:35,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:32:35,979 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:32:36,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 14:32:36,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:36,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:32:36,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:32:36,324 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 14:32:36,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:32:36,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142804006] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:32:36,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:32:36,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:32:36,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694638691] [2022-11-23 14:32:36,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:32:36,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:32:36,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:32:36,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:32:36,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:32:36,326 INFO L87 Difference]: Start difference. First operand 14880 states and 23316 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:32:40,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:32:40,590 INFO L93 Difference]: Finished difference Result 42969 states and 69821 transitions. [2022-11-23 14:32:40,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:32:40,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2022-11-23 14:32:40,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:32:40,712 INFO L225 Difference]: With dead ends: 42969 [2022-11-23 14:32:40,712 INFO L226 Difference]: Without dead ends: 28804 [2022-11-23 14:32:40,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:32:40,770 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 362 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:32:40,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 600 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:32:40,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28804 states. [2022-11-23 14:32:44,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28804 to 28720. [2022-11-23 14:32:44,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28720 states, 24342 states have (on average 1.5075589516062773) internal successors, (36697), 24452 states have internal predecessors, (36697), 3304 states have call successors, (3304), 1055 states have call predecessors, (3304), 1072 states have return successors, (5123), 3214 states have call predecessors, (5123), 3301 states have call successors, (5123) [2022-11-23 14:32:45,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28720 states to 28720 states and 45124 transitions. [2022-11-23 14:32:45,070 INFO L78 Accepts]: Start accepts. Automaton has 28720 states and 45124 transitions. Word has length 144 [2022-11-23 14:32:45,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:32:45,070 INFO L495 AbstractCegarLoop]: Abstraction has 28720 states and 45124 transitions. [2022-11-23 14:32:45,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:32:45,070 INFO L276 IsEmpty]: Start isEmpty. Operand 28720 states and 45124 transitions. [2022-11-23 14:32:45,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-23 14:32:45,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:32:45,105 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:32:45,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 14:32:45,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:32:45,312 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:32:45,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:32:45,313 INFO L85 PathProgramCache]: Analyzing trace with hash -729653803, now seen corresponding path program 1 times [2022-11-23 14:32:45,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:32:45,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308033974] [2022-11-23 14:32:45,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:45,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:32:45,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:45,450 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:32:45,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:32:45,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308033974] [2022-11-23 14:32:45,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308033974] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:32:45,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365671233] [2022-11-23 14:32:45,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:45,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:32:45,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:32:45,452 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:32:45,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff296090-7fb9-443f-8754-6178b452b040/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 14:32:45,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:45,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 1099 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:32:45,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:32:45,802 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 14:32:45,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:32:45,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365671233] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:32:45,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:32:45,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:32:45,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126243971] [2022-11-23 14:32:45,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:32:45,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:32:45,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:32:45,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:32:45,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:32:45,804 INFO L87 Difference]: Start difference. First operand 28720 states and 45124 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:32:53,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:32:53,371 INFO L93 Difference]: Finished difference Result 84249 states and 136573 transitions. [2022-11-23 14:32:53,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:32:53,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2022-11-23 14:32:53,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:32:53,694 INFO L225 Difference]: With dead ends: 84249 [2022-11-23 14:32:53,695 INFO L226 Difference]: Without dead ends: 56244 [2022-11-23 14:32:53,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:32:53,835 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 350 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:32:53,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 600 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:32:53,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56244 states.