./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V --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 b395f094f2d3990354e9b2c1428e908d883c16492f3b21174dd87f3c0cfda780 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:27:54,525 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:27:54,528 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:27:54,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:27:54,584 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:27:54,588 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:27:54,590 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:27:54,594 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:27:54,597 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:27:54,605 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:27:54,607 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:27:54,609 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:27:54,610 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:27:54,613 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:27:54,615 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:27:54,624 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:27:54,626 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:27:54,627 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:27:54,630 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:27:54,640 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:27:54,643 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:27:54,647 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:27:54,651 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:27:54,652 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:27:54,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:27:54,662 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:27:54,662 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:27:54,664 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:27:54,665 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:27:54,667 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:27:54,667 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:27:54,668 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:27:54,670 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:27:54,671 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:27:54,673 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:27:54,673 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:27:54,674 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:27:54,674 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:27:54,675 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:27:54,675 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:27:54,676 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:27:54,677 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:27:54,721 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:27:54,722 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:27:54,722 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:27:54,723 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:27:54,724 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:27:54,730 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:27:54,730 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:27:54,731 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:27:54,731 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:27:54,731 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:27:54,733 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:27:54,733 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:27:54,733 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:27:54,733 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:27:54,734 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:27:54,734 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:27:54,734 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:27:54,734 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:27:54,736 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:27:54,736 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:27:54,736 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:27:54,737 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:27:54,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:27:54,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:27:54,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:27:54,738 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:27:54,740 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:27:54,740 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:27:54,740 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:27:54,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:27:54,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:27:54,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:27:54,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:27:54,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:27:54,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:27:54,742 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:27:54,743 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:27:54,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:27:54,743 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:27:54,743 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:27:54,744 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:27:54,744 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b395f094f2d3990354e9b2c1428e908d883c16492f3b21174dd87f3c0cfda780 [2021-11-23 02:27:55,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:27:55,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:27:55,023 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:27:55,024 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:27:55,025 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:27:55,027 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c [2021-11-23 02:27:55,098 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/data/7c41c1274/2ea24e5dedd1424594a5a0c3e77f9624/FLAG89b3e7540 [2021-11-23 02:27:55,640 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:27:55,640 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c [2021-11-23 02:27:55,666 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/data/7c41c1274/2ea24e5dedd1424594a5a0c3e77f9624/FLAG89b3e7540 [2021-11-23 02:27:55,956 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/data/7c41c1274/2ea24e5dedd1424594a5a0c3e77f9624 [2021-11-23 02:27:55,958 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:27:55,960 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:27:55,961 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:27:55,961 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:27:55,965 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:27:55,966 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:27:55" (1/1) ... [2021-11-23 02:27:55,967 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bbaf1aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:55, skipping insertion in model container [2021-11-23 02:27:55,967 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:27:55" (1/1) ... [2021-11-23 02:27:55,974 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:27:56,030 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:27:56,195 WARN L230 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_b8fb6bc1-3736-44a2-9933-fad561c60f46/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c[914,927] [2021-11-23 02:27:56,244 WARN L230 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_b8fb6bc1-3736-44a2-9933-fad561c60f46/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c[7115,7128] [2021-11-23 02:27:56,339 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:27:56,349 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:27:56,361 WARN L230 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_b8fb6bc1-3736-44a2-9933-fad561c60f46/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c[914,927] [2021-11-23 02:27:56,399 WARN L230 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_b8fb6bc1-3736-44a2-9933-fad561c60f46/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c[7115,7128] [2021-11-23 02:27:56,436 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:27:56,464 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:27:56,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:56 WrapperNode [2021-11-23 02:27:56,464 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:27:56,465 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:27:56,466 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:27:56,466 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:27:56,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:56" (1/1) ... [2021-11-23 02:27:56,487 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:56" (1/1) ... [2021-11-23 02:27:56,540 INFO L137 Inliner]: procedures = 67, calls = 78, calls flagged for inlining = 36, calls inlined = 36, statements flattened = 750 [2021-11-23 02:27:56,541 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:27:56,542 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:27:56,542 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:27:56,542 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:27:56,551 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:56" (1/1) ... [2021-11-23 02:27:56,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:56" (1/1) ... [2021-11-23 02:27:56,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:56" (1/1) ... [2021-11-23 02:27:56,556 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:56" (1/1) ... [2021-11-23 02:27:56,571 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:56" (1/1) ... [2021-11-23 02:27:56,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:56" (1/1) ... [2021-11-23 02:27:56,590 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:56" (1/1) ... [2021-11-23 02:27:56,596 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:27:56,597 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:27:56,597 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:27:56,597 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:27:56,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:56" (1/1) ... [2021-11-23 02:27:56,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:27:56,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:27:56,650 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:27:56,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:27:56,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:27:56,687 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-23 02:27:56,687 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-23 02:27:56,687 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-11-23 02:27:56,687 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-11-23 02:27:56,687 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-11-23 02:27:56,688 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-11-23 02:27:56,688 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-11-23 02:27:56,688 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-11-23 02:27:56,688 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-11-23 02:27:56,688 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-11-23 02:27:56,689 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-11-23 02:27:56,689 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-11-23 02:27:56,689 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-11-23 02:27:56,689 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-11-23 02:27:56,689 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-11-23 02:27:56,689 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-11-23 02:27:56,690 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-11-23 02:27:56,690 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-11-23 02:27:56,690 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-11-23 02:27:56,690 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-11-23 02:27:56,690 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-11-23 02:27:56,691 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-11-23 02:27:56,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:27:56,691 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-11-23 02:27:56,691 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-11-23 02:27:56,691 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-11-23 02:27:56,691 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-11-23 02:27:56,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:27:56,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:27:56,692 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-11-23 02:27:56,692 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-11-23 02:27:56,804 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:27:56,806 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:27:57,599 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:27:57,931 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:27:57,931 INFO L301 CfgBuilder]: Removed 14 assume(true) statements. [2021-11-23 02:27:57,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:27:57 BoogieIcfgContainer [2021-11-23 02:27:57,937 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:27:57,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:27:57,939 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:27:57,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:27:57,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:27:55" (1/3) ... [2021-11-23 02:27:57,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@251786c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:27:57, skipping insertion in model container [2021-11-23 02:27:57,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:56" (2/3) ... [2021-11-23 02:27:57,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@251786c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:27:57, skipping insertion in model container [2021-11-23 02:27:57,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:27:57" (3/3) ... [2021-11-23 02:27:57,947 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.07.cil-1.c [2021-11-23 02:27:57,957 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:27:57,957 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 02:27:58,018 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:27:58,024 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:27:58,024 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 02:27:58,047 INFO L276 IsEmpty]: Start isEmpty. Operand has 205 states, 153 states have (on average 1.522875816993464) internal successors, (233), 159 states have internal predecessors, (233), 35 states have call successors, (35), 14 states have call predecessors, (35), 14 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-11-23 02:27:58,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-23 02:27:58,056 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:58,056 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:27:58,057 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:58,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:58,063 INFO L85 PathProgramCache]: Analyzing trace with hash -828462110, now seen corresponding path program 1 times [2021-11-23 02:27:58,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:58,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058124672] [2021-11-23 02:27:58,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:58,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:58,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:58,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:27:58,412 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:58,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058124672] [2021-11-23 02:27:58,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058124672] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:58,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:58,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:27:58,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67988185] [2021-11-23 02:27:58,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:58,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:27:58,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:58,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:27:58,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:27:58,451 INFO L87 Difference]: Start difference. First operand has 205 states, 153 states have (on average 1.522875816993464) internal successors, (233), 159 states have internal predecessors, (233), 35 states have call successors, (35), 14 states have call predecessors, (35), 14 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) 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) [2021-11-23 02:27:59,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:59,532 INFO L93 Difference]: Finished difference Result 830 states and 1204 transitions. [2021-11-23 02:27:59,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:27:59,535 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 [2021-11-23 02:27:59,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:59,566 INFO L225 Difference]: With dead ends: 830 [2021-11-23 02:27:59,567 INFO L226 Difference]: Without dead ends: 611 [2021-11-23 02:27:59,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:27:59,581 INFO L933 BasicCegarLoop]: 401 mSDtfsCounter, 909 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:59,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [918 Valid, 1014 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 02:27:59,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-11-23 02:27:59,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 540. [2021-11-23 02:27:59,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 387 states have (on average 1.3385012919896642) internal successors, (518), 391 states have internal predecessors, (518), 90 states have call successors, (90), 62 states have call predecessors, (90), 61 states have return successors, (103), 88 states have call predecessors, (103), 88 states have call successors, (103) [2021-11-23 02:27:59,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 711 transitions. [2021-11-23 02:27:59,749 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 711 transitions. Word has length 45 [2021-11-23 02:27:59,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:59,751 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 711 transitions. [2021-11-23 02:27:59,751 INFO L471 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) [2021-11-23 02:27:59,752 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 711 transitions. [2021-11-23 02:27:59,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-23 02:27:59,761 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:59,761 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:27:59,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:27:59,762 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:59,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:59,766 INFO L85 PathProgramCache]: Analyzing trace with hash -2107454651, now seen corresponding path program 1 times [2021-11-23 02:27:59,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:59,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141607299] [2021-11-23 02:27:59,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:59,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:59,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:59,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:27:59,944 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:59,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141607299] [2021-11-23 02:27:59,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141607299] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:59,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:59,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 02:27:59,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757583627] [2021-11-23 02:27:59,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:59,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:27:59,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:59,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:27:59,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:27:59,956 INFO L87 Difference]: Start difference. First operand 540 states and 711 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) [2021-11-23 02:28:00,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:00,674 INFO L93 Difference]: Finished difference Result 1301 states and 1658 transitions. [2021-11-23 02:28:00,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 02:28:00,675 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 [2021-11-23 02:28:00,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:00,683 INFO L225 Difference]: With dead ends: 1301 [2021-11-23 02:28:00,683 INFO L226 Difference]: Without dead ends: 898 [2021-11-23 02:28:00,685 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:28:00,687 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 422 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 929 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:00,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 929 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:28:00,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-11-23 02:28:00,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 869. [2021-11-23 02:28:00,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 610 states have (on average 1.2934426229508196) internal successors, (789), 615 states have internal predecessors, (789), 146 states have call successors, (146), 110 states have call predecessors, (146), 111 states have return successors, (177), 145 states have call predecessors, (177), 144 states have call successors, (177) [2021-11-23 02:28:00,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1112 transitions. [2021-11-23 02:28:00,764 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1112 transitions. Word has length 46 [2021-11-23 02:28:00,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:00,765 INFO L470 AbstractCegarLoop]: Abstraction has 869 states and 1112 transitions. [2021-11-23 02:28:00,765 INFO L471 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) [2021-11-23 02:28:00,765 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1112 transitions. [2021-11-23 02:28:00,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 02:28:00,768 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:00,768 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:28:00,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:28:00,768 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:00,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:00,769 INFO L85 PathProgramCache]: Analyzing trace with hash -223685774, now seen corresponding path program 1 times [2021-11-23 02:28:00,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:00,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098353404] [2021-11-23 02:28:00,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:00,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:00,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:00,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:28:00,831 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:00,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098353404] [2021-11-23 02:28:00,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098353404] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:28:00,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:28:00,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:28:00,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771998823] [2021-11-23 02:28:00,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:28:00,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:28:00,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:00,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:28:00,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:28:00,835 INFO L87 Difference]: Start difference. First operand 869 states and 1112 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) [2021-11-23 02:28:00,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:00,990 INFO L93 Difference]: Finished difference Result 1810 states and 2271 transitions. [2021-11-23 02:28:00,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:28:00,990 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 [2021-11-23 02:28:00,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:00,998 INFO L225 Difference]: With dead ends: 1810 [2021-11-23 02:28:00,999 INFO L226 Difference]: Without dead ends: 1128 [2021-11-23 02:28:01,001 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:28:01,002 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 68 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:01,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 473 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:28:01,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2021-11-23 02:28:01,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 1106. [2021-11-23 02:28:01,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1106 states, 771 states have (on average 1.2749675745784694) internal successors, (983), 776 states have internal predecessors, (983), 188 states have call successors, (188), 148 states have call predecessors, (188), 145 states have return successors, (223), 183 states have call predecessors, (223), 186 states have call successors, (223) [2021-11-23 02:28:01,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 1394 transitions. [2021-11-23 02:28:01,106 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 1394 transitions. Word has length 47 [2021-11-23 02:28:01,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:01,106 INFO L470 AbstractCegarLoop]: Abstraction has 1106 states and 1394 transitions. [2021-11-23 02:28:01,107 INFO L471 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) [2021-11-23 02:28:01,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 1394 transitions. [2021-11-23 02:28:01,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-23 02:28:01,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:01,109 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:28:01,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:28:01,109 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:01,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:01,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1556248517, now seen corresponding path program 1 times [2021-11-23 02:28:01,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:01,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219996746] [2021-11-23 02:28:01,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:01,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:01,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:01,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:28:01,165 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:01,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219996746] [2021-11-23 02:28:01,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219996746] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:28:01,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:28:01,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:28:01,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017216933] [2021-11-23 02:28:01,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:28:01,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:28:01,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:01,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:28:01,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:28:01,168 INFO L87 Difference]: Start difference. First operand 1106 states and 1394 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) [2021-11-23 02:28:01,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:01,286 INFO L93 Difference]: Finished difference Result 1512 states and 1884 transitions. [2021-11-23 02:28:01,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:28:01,287 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 [2021-11-23 02:28:01,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:01,294 INFO L225 Difference]: With dead ends: 1512 [2021-11-23 02:28:01,294 INFO L226 Difference]: Without dead ends: 957 [2021-11-23 02:28:01,296 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:28:01,297 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 257 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:01,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 314 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:28:01,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2021-11-23 02:28:01,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 751. [2021-11-23 02:28:01,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 535 states have (on average 1.2710280373831775) internal successors, (680), 539 states have internal predecessors, (680), 125 states have call successors, (125), 94 states have call predecessors, (125), 89 states have return successors, (131), 119 states have call predecessors, (131), 123 states have call successors, (131) [2021-11-23 02:28:01,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 936 transitions. [2021-11-23 02:28:01,355 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 936 transitions. Word has length 53 [2021-11-23 02:28:01,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:01,356 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 936 transitions. [2021-11-23 02:28:01,356 INFO L471 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) [2021-11-23 02:28:01,356 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 936 transitions. [2021-11-23 02:28:01,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 02:28:01,358 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:01,358 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:28:01,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:28:01,359 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:01,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:01,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1834653725, now seen corresponding path program 1 times [2021-11-23 02:28:01,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:01,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595193446] [2021-11-23 02:28:01,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:01,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:01,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:01,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:28:01,412 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:01,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595193446] [2021-11-23 02:28:01,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595193446] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:28:01,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:28:01,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:28:01,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079789926] [2021-11-23 02:28:01,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:28:01,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:28:01,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:01,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:28:01,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:28:01,415 INFO L87 Difference]: Start difference. First operand 751 states and 936 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) [2021-11-23 02:28:01,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:01,671 INFO L93 Difference]: Finished difference Result 1006 states and 1237 transitions. [2021-11-23 02:28:01,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:28:01,672 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 [2021-11-23 02:28:01,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:01,679 INFO L225 Difference]: With dead ends: 1006 [2021-11-23 02:28:01,679 INFO L226 Difference]: Without dead ends: 1003 [2021-11-23 02:28:01,680 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:28:01,684 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 473 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:01,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 293 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:28:01,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2021-11-23 02:28:01,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 750. [2021-11-23 02:28:01,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 535 states have (on average 1.2598130841121495) internal successors, (674), 538 states have internal predecessors, (674), 124 states have call successors, (124), 94 states have call predecessors, (124), 89 states have return successors, (131), 119 states have call predecessors, (131), 123 states have call successors, (131) [2021-11-23 02:28:01,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 929 transitions. [2021-11-23 02:28:01,757 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 929 transitions. Word has length 54 [2021-11-23 02:28:01,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:01,758 INFO L470 AbstractCegarLoop]: Abstraction has 750 states and 929 transitions. [2021-11-23 02:28:01,758 INFO L471 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) [2021-11-23 02:28:01,758 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 929 transitions. [2021-11-23 02:28:01,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-23 02:28:01,761 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:01,761 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:28:01,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:28:01,761 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:01,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:01,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1361671707, now seen corresponding path program 1 times [2021-11-23 02:28:01,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:01,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737923814] [2021-11-23 02:28:01,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:01,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:01,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:01,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:28:01,903 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:01,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737923814] [2021-11-23 02:28:01,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737923814] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:28:01,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:28:01,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:28:01,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928220682] [2021-11-23 02:28:01,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:28:01,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:28:01,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:01,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:28:01,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:28:01,906 INFO L87 Difference]: Start difference. First operand 750 states and 929 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:28:02,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:02,608 INFO L93 Difference]: Finished difference Result 1353 states and 1903 transitions. [2021-11-23 02:28:02,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:28:02,609 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2021-11-23 02:28:02,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:02,618 INFO L225 Difference]: With dead ends: 1353 [2021-11-23 02:28:02,618 INFO L226 Difference]: Without dead ends: 1227 [2021-11-23 02:28:02,620 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:28:02,625 INFO L933 BasicCegarLoop]: 435 mSDtfsCounter, 983 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 995 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:02,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [995 Valid, 994 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 02:28:02,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-11-23 02:28:02,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1216. [2021-11-23 02:28:02,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 912 states have (on average 1.355263157894737) internal successors, (1236), 918 states have internal predecessors, (1236), 189 states have call successors, (189), 118 states have call predecessors, (189), 113 states have return successors, (238), 181 states have call predecessors, (238), 188 states have call successors, (238) [2021-11-23 02:28:02,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 1663 transitions. [2021-11-23 02:28:02,754 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 1663 transitions. Word has length 52 [2021-11-23 02:28:02,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:02,756 INFO L470 AbstractCegarLoop]: Abstraction has 1216 states and 1663 transitions. [2021-11-23 02:28:02,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:28:02,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 1663 transitions. [2021-11-23 02:28:02,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-23 02:28:02,758 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:02,758 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:28:02,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:28:02,759 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:02,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:02,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1040757541, now seen corresponding path program 1 times [2021-11-23 02:28:02,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:02,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550432282] [2021-11-23 02:28:02,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:02,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:02,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:02,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:28:02,902 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:02,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550432282] [2021-11-23 02:28:02,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550432282] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:28:02,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096873041] [2021-11-23 02:28:02,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:02,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:28:02,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:28:02,907 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:28:02,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:28:03,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:03,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:28:03,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:28:03,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:28:03,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:28:03,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:28:03,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096873041] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:28:03,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [873921962] [2021-11-23 02:28:03,785 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2021-11-23 02:28:03,785 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:28:03,790 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:28:03,795 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:28:03,795 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:28:07,853 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 155 for LOIs [2021-11-23 02:28:07,884 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 151 for LOIs [2021-11-23 02:28:07,912 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 159 for LOIs [2021-11-23 02:28:08,606 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 155 for LOIs [2021-11-23 02:28:08,725 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 155 for LOIs [2021-11-23 02:28:08,813 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 155 for LOIs [2021-11-23 02:28:08,846 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 162 for LOIs [2021-11-23 02:28:08,879 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:28:24,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [873921962] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:28:24,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:28:24,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [5, 5, 4] total 41 [2021-11-23 02:28:24,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880610116] [2021-11-23 02:28:24,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:28:24,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-23 02:28:24,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:24,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-23 02:28:24,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640 [2021-11-23 02:28:24,004 INFO L87 Difference]: Start difference. First operand 1216 states and 1663 transitions. Second operand has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-23 02:28:46,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:46,670 INFO L93 Difference]: Finished difference Result 1877 states and 2437 transitions. [2021-11-23 02:28:46,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-23 02:28:46,672 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2021-11-23 02:28:46,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:46,681 INFO L225 Difference]: With dead ends: 1877 [2021-11-23 02:28:46,681 INFO L226 Difference]: Without dead ends: 1264 [2021-11-23 02:28:46,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 122 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1500 ImplicationChecksByTransitivity, 30.7s TimeCoverageRelationStatistics Valid=601, Invalid=4091, Unknown=0, NotChecked=0, Total=4692 [2021-11-23 02:28:46,686 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 141 mSDsluCounter, 2399 mSDsCounter, 0 mSdLazyCounter, 5420 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2513 SdHoareTripleChecker+Invalid, 5575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 5420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:46,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2513 Invalid, 5575 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [155 Valid, 5420 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2021-11-23 02:28:46,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-11-23 02:28:46,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 1249. [2021-11-23 02:28:46,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 937 states have (on average 1.3468516542155817) internal successors, (1262), 943 states have internal predecessors, (1262), 191 states have call successors, (191), 124 states have call predecessors, (191), 119 states have return successors, (240), 183 states have call predecessors, (240), 190 states have call successors, (240) [2021-11-23 02:28:46,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 1693 transitions. [2021-11-23 02:28:46,800 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 1693 transitions. Word has length 55 [2021-11-23 02:28:46,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:46,800 INFO L470 AbstractCegarLoop]: Abstraction has 1249 states and 1693 transitions. [2021-11-23 02:28:46,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-23 02:28:46,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 1693 transitions. [2021-11-23 02:28:46,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-23 02:28:46,803 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:46,803 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:28:46,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:28:47,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:28:47,022 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:47,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:47,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1764559944, now seen corresponding path program 1 times [2021-11-23 02:28:47,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:47,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631671370] [2021-11-23 02:28:47,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:47,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:47,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:47,082 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:28:47,082 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:47,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631671370] [2021-11-23 02:28:47,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631671370] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:28:47,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:28:47,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:28:47,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219614867] [2021-11-23 02:28:47,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:28:47,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:28:47,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:47,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:28:47,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:28:47,084 INFO L87 Difference]: Start difference. First operand 1249 states and 1693 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) [2021-11-23 02:28:47,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:47,254 INFO L93 Difference]: Finished difference Result 1831 states and 2376 transitions. [2021-11-23 02:28:47,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:28:47,255 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 [2021-11-23 02:28:47,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:47,266 INFO L225 Difference]: With dead ends: 1831 [2021-11-23 02:28:47,267 INFO L226 Difference]: Without dead ends: 1458 [2021-11-23 02:28:47,268 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:28:47,269 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 43 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:47,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 510 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:28:47,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2021-11-23 02:28:47,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1370. [2021-11-23 02:28:47,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1370 states, 1018 states have (on average 1.331041257367387) internal successors, (1355), 1028 states have internal predecessors, (1355), 213 states have call successors, (213), 146 states have call predecessors, (213), 137 states have return successors, (262), 197 states have call predecessors, (262), 212 states have call successors, (262) [2021-11-23 02:28:47,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1370 states to 1370 states and 1830 transitions. [2021-11-23 02:28:47,389 INFO L78 Accepts]: Start accepts. Automaton has 1370 states and 1830 transitions. Word has length 61 [2021-11-23 02:28:47,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:47,390 INFO L470 AbstractCegarLoop]: Abstraction has 1370 states and 1830 transitions. [2021-11-23 02:28:47,390 INFO L471 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) [2021-11-23 02:28:47,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1370 states and 1830 transitions. [2021-11-23 02:28:47,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-23 02:28:47,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:47,392 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 02:28:47,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:28:47,393 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:47,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:47,393 INFO L85 PathProgramCache]: Analyzing trace with hash -543402847, now seen corresponding path program 1 times [2021-11-23 02:28:47,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:47,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084876777] [2021-11-23 02:28:47,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:47,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:47,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:28:47,456 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:47,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084876777] [2021-11-23 02:28:47,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084876777] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:28:47,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:28:47,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 02:28:47,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732355075] [2021-11-23 02:28:47,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:28:47,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:28:47,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:47,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:28:47,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:28:47,459 INFO L87 Difference]: Start difference. First operand 1370 states and 1830 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 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) [2021-11-23 02:28:48,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:48,152 INFO L93 Difference]: Finished difference Result 2367 states and 2990 transitions. [2021-11-23 02:28:48,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 02:28:48,153 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 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 63 [2021-11-23 02:28:48,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:48,167 INFO L225 Difference]: With dead ends: 2367 [2021-11-23 02:28:48,167 INFO L226 Difference]: Without dead ends: 1681 [2021-11-23 02:28:48,171 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:28:48,174 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 401 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:48,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 787 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:28:48,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1681 states. [2021-11-23 02:28:48,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1681 to 1550. [2021-11-23 02:28:48,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1138 states have (on average 1.3040421792618628) internal successors, (1484), 1148 states have internal predecessors, (1484), 245 states have call successors, (245), 174 states have call predecessors, (245), 165 states have return successors, (294), 229 states have call predecessors, (294), 244 states have call successors, (294) [2021-11-23 02:28:48,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 2023 transitions. [2021-11-23 02:28:48,322 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 2023 transitions. Word has length 63 [2021-11-23 02:28:48,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:48,323 INFO L470 AbstractCegarLoop]: Abstraction has 1550 states and 2023 transitions. [2021-11-23 02:28:48,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 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) [2021-11-23 02:28:48,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 2023 transitions. [2021-11-23 02:28:48,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 02:28:48,325 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:48,325 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 02:28:48,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:28:48,326 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:48,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:48,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1355168719, now seen corresponding path program 1 times [2021-11-23 02:28:48,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:48,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033968330] [2021-11-23 02:28:48,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:48,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:48,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:28:48,426 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:48,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033968330] [2021-11-23 02:28:48,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033968330] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:28:48,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563799315] [2021-11-23 02:28:48,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:48,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:28:48,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:28:48,430 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:28:48,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:28:48,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:48,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:28:48,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:28:48,870 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:28:48,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:28:49,100 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:28:49,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563799315] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:28:49,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [782604822] [2021-11-23 02:28:49,104 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2021-11-23 02:28:49,104 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:28:49,105 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:28:49,105 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:28:49,106 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:28:57,416 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 155 for LOIs [2021-11-23 02:28:57,436 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 223 for LOIs [2021-11-23 02:28:57,499 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 217 for LOIs [2021-11-23 02:28:57,579 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 159 for LOIs [2021-11-23 02:28:58,044 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 155 for LOIs [2021-11-23 02:28:58,104 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 155 for LOIs [2021-11-23 02:28:58,175 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 155 for LOIs [2021-11-23 02:28:58,195 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 162 for LOIs [2021-11-23 02:28:58,244 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:29:23,461 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35209#(and (= ~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) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t6_st~0) (= ~t2_i~0 0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~token~0 0) (= ~c_dr_pc~0 0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= ~a_t~0 0) (<= 0 ~t3_pc~0) (= 0 ~t2_st~0) (<= 2 ~E_5~0) (<= 0 ~m_st~0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (<= 0 ~t4_pc~0) (= ~M_E~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2021-11-23 02:29:23,462 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:29:23,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:29:23,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2021-11-23 02:29:23,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383409375] [2021-11-23 02:29:23,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:29:23,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:29:23,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:23,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:29:23,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 02:29:23,465 INFO L87 Difference]: Start difference. First operand 1550 states and 2023 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2021-11-23 02:29:24,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:24,157 INFO L93 Difference]: Finished difference Result 3757 states and 4552 transitions. [2021-11-23 02:29:24,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:29:24,157 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 64 [2021-11-23 02:29:24,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:24,186 INFO L225 Difference]: With dead ends: 3757 [2021-11-23 02:29:24,187 INFO L226 Difference]: Without dead ends: 3754 [2021-11-23 02:29:24,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 144 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 02:29:24,190 INFO L933 BasicCegarLoop]: 364 mSDtfsCounter, 509 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:24,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 975 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:29:24,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3754 states. [2021-11-23 02:29:24,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3754 to 2865. [2021-11-23 02:29:24,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2865 states, 2030 states have (on average 1.2443349753694581) internal successors, (2526), 2048 states have internal predecessors, (2526), 472 states have call successors, (472), 378 states have call predecessors, (472), 361 states have return successors, (533), 440 states have call predecessors, (533), 471 states have call successors, (533) [2021-11-23 02:29:24,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 3531 transitions. [2021-11-23 02:29:24,477 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 3531 transitions. Word has length 64 [2021-11-23 02:29:24,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:24,478 INFO L470 AbstractCegarLoop]: Abstraction has 2865 states and 3531 transitions. [2021-11-23 02:29:24,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2021-11-23 02:29:24,479 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 3531 transitions. [2021-11-23 02:29:24,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 02:29:24,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:24,487 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-23 02:29:24,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-23 02:29:24,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 02:29:24,706 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:29:24,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:24,707 INFO L85 PathProgramCache]: Analyzing trace with hash 804350377, now seen corresponding path program 2 times [2021-11-23 02:29:24,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:24,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776918957] [2021-11-23 02:29:24,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:24,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:24,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:24,756 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:29:24,756 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:24,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776918957] [2021-11-23 02:29:24,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776918957] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:24,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:29:24,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:29:24,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902783067] [2021-11-23 02:29:24,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:24,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:29:24,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:24,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:29:24,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:29:24,759 INFO L87 Difference]: Start difference. First operand 2865 states and 3531 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 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) [2021-11-23 02:29:24,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:24,996 INFO L93 Difference]: Finished difference Result 4061 states and 4903 transitions. [2021-11-23 02:29:24,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:29:24,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 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 67 [2021-11-23 02:29:24,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:25,015 INFO L225 Difference]: With dead ends: 4061 [2021-11-23 02:29:25,015 INFO L226 Difference]: Without dead ends: 2123 [2021-11-23 02:29:25,020 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:29:25,022 INFO L933 BasicCegarLoop]: 285 mSDtfsCounter, 262 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:25,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 352 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:29:25,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2021-11-23 02:29:25,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 2107. [2021-11-23 02:29:25,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2107 states, 1524 states have (on average 1.2591863517060367) internal successors, (1919), 1534 states have internal predecessors, (1919), 336 states have call successors, (336), 254 states have call predecessors, (336), 245 states have return successors, (389), 320 states have call predecessors, (389), 335 states have call successors, (389) [2021-11-23 02:29:25,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2107 states to 2107 states and 2644 transitions. [2021-11-23 02:29:25,224 INFO L78 Accepts]: Start accepts. Automaton has 2107 states and 2644 transitions. Word has length 67 [2021-11-23 02:29:25,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:25,224 INFO L470 AbstractCegarLoop]: Abstraction has 2107 states and 2644 transitions. [2021-11-23 02:29:25,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 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) [2021-11-23 02:29:25,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2107 states and 2644 transitions. [2021-11-23 02:29:25,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 02:29:25,228 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:25,228 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:29:25,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 02:29:25,229 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:29:25,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:25,229 INFO L85 PathProgramCache]: Analyzing trace with hash 729881269, now seen corresponding path program 1 times [2021-11-23 02:29:25,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:25,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626977177] [2021-11-23 02:29:25,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:25,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:25,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:25,269 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:29:25,270 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:25,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626977177] [2021-11-23 02:29:25,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626977177] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:25,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:29:25,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:29:25,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363984204] [2021-11-23 02:29:25,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:25,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:29:25,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:25,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:29:25,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:29:25,272 INFO L87 Difference]: Start difference. First operand 2107 states and 2644 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) [2021-11-23 02:29:25,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:25,551 INFO L93 Difference]: Finished difference Result 3704 states and 4472 transitions. [2021-11-23 02:29:25,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:29:25,551 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 [2021-11-23 02:29:25,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:25,567 INFO L225 Difference]: With dead ends: 3704 [2021-11-23 02:29:25,568 INFO L226 Difference]: Without dead ends: 2325 [2021-11-23 02:29:25,572 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:29:25,572 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 38 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:25,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 503 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:29:25,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2325 states. [2021-11-23 02:29:25,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2325 to 2244. [2021-11-23 02:29:25,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2244 states, 1621 states have (on average 1.2529302899444787) internal successors, (2031), 1637 states have internal predecessors, (2031), 357 states have call successors, (357), 275 states have call predecessors, (357), 264 states have return successors, (416), 333 states have call predecessors, (416), 356 states have call successors, (416) [2021-11-23 02:29:25,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2244 states to 2244 states and 2804 transitions. [2021-11-23 02:29:25,799 INFO L78 Accepts]: Start accepts. Automaton has 2244 states and 2804 transitions. Word has length 71 [2021-11-23 02:29:25,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:25,799 INFO L470 AbstractCegarLoop]: Abstraction has 2244 states and 2804 transitions. [2021-11-23 02:29:25,800 INFO L471 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) [2021-11-23 02:29:25,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2244 states and 2804 transitions. [2021-11-23 02:29:25,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-23 02:29:25,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:25,804 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:29:25,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 02:29:25,805 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:29:25,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:25,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1445641267, now seen corresponding path program 1 times [2021-11-23 02:29:25,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:25,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379298426] [2021-11-23 02:29:25,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:25,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:25,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:25,982 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-23 02:29:25,982 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:25,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379298426] [2021-11-23 02:29:25,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379298426] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:29:25,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915409129] [2021-11-23 02:29:25,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:25,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:29:25,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:29:25,984 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:29:26,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:29:26,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:26,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 02:29:26,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:29:26,300 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:29:26,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:29:26,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915409129] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:26,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:29:26,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2021-11-23 02:29:26,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392360540] [2021-11-23 02:29:26,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:26,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:29:26,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:26,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:29:26,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-11-23 02:29:26,303 INFO L87 Difference]: Start difference. First operand 2244 states and 2804 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) [2021-11-23 02:29:26,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:26,668 INFO L93 Difference]: Finished difference Result 3644 states and 4460 transitions. [2021-11-23 02:29:26,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:29:26,669 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 [2021-11-23 02:29:26,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:26,683 INFO L225 Difference]: With dead ends: 3644 [2021-11-23 02:29:26,683 INFO L226 Difference]: Without dead ends: 2025 [2021-11-23 02:29:26,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:29:26,688 INFO L933 BasicCegarLoop]: 282 mSDtfsCounter, 254 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:26,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 1056 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:29:26,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2021-11-23 02:29:26,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 1737. [2021-11-23 02:29:26,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1305 states have (on average 1.282758620689655) internal successors, (1674), 1319 states have internal predecessors, (1674), 253 states have call successors, (253), 184 states have call predecessors, (253), 177 states have return successors, (306), 235 states have call predecessors, (306), 252 states have call successors, (306) [2021-11-23 02:29:26,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 2233 transitions. [2021-11-23 02:29:26,858 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 2233 transitions. Word has length 102 [2021-11-23 02:29:26,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:26,859 INFO L470 AbstractCegarLoop]: Abstraction has 1737 states and 2233 transitions. [2021-11-23 02:29:26,859 INFO L471 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) [2021-11-23 02:29:26,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 2233 transitions. [2021-11-23 02:29:26,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 02:29:26,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:26,864 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:29:26,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:29:27,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-23 02:29:27,082 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:29:27,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:27,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1222040967, now seen corresponding path program 1 times [2021-11-23 02:29:27,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:27,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555060856] [2021-11-23 02:29:27,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:27,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:27,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:27,148 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 02:29:27,148 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:27,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555060856] [2021-11-23 02:29:27,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555060856] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:29:27,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937204806] [2021-11-23 02:29:27,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:27,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:29:27,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:29:27,151 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:29:27,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:29:27,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:27,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:29:27,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:29:27,484 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 02:29:27,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:29:27,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937204806] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:27,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:29:27,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-23 02:29:27,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918451450] [2021-11-23 02:29:27,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:27,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:29:27,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:27,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:29:27,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:29:27,487 INFO L87 Difference]: Start difference. First operand 1737 states and 2233 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:29:27,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:27,731 INFO L93 Difference]: Finished difference Result 2905 states and 4132 transitions. [2021-11-23 02:29:27,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:29:27,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 101 [2021-11-23 02:29:27,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:27,747 INFO L225 Difference]: With dead ends: 2905 [2021-11-23 02:29:27,748 INFO L226 Difference]: Without dead ends: 2313 [2021-11-23 02:29:27,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:29:27,753 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 253 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:27,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 401 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:29:27,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2021-11-23 02:29:27,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 2306. [2021-11-23 02:29:27,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 1767 states have (on average 1.3338992642897567) internal successors, (2357), 1784 states have internal predecessors, (2357), 330 states have call successors, (330), 214 states have call predecessors, (330), 207 states have return successors, (421), 309 states have call predecessors, (421), 329 states have call successors, (421) [2021-11-23 02:29:28,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 3108 transitions. [2021-11-23 02:29:28,008 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 3108 transitions. Word has length 101 [2021-11-23 02:29:28,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:28,009 INFO L470 AbstractCegarLoop]: Abstraction has 2306 states and 3108 transitions. [2021-11-23 02:29:28,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:29:28,010 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 3108 transitions. [2021-11-23 02:29:28,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 02:29:28,016 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:28,016 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:29:28,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:29:28,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 02:29:28,236 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:29:28,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:28,237 INFO L85 PathProgramCache]: Analyzing trace with hash 30957047, now seen corresponding path program 1 times [2021-11-23 02:29:28,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:28,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119128210] [2021-11-23 02:29:28,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:28,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:28,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:28,308 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 02:29:28,308 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:28,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119128210] [2021-11-23 02:29:28,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119128210] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:29:28,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133271113] [2021-11-23 02:29:28,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:28,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:29:28,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:29:28,311 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:29:28,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:29:28,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:28,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:29:28,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:29:28,673 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:29:28,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:29:28,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133271113] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:28,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:29:28,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-23 02:29:28,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311326702] [2021-11-23 02:29:28,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:28,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:29:28,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:28,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:29:28,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:29:28,677 INFO L87 Difference]: Start difference. First operand 2306 states and 3108 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:29:28,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:28,984 INFO L93 Difference]: Finished difference Result 4597 states and 6804 transitions. [2021-11-23 02:29:28,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:29:28,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 101 [2021-11-23 02:29:28,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:29,012 INFO L225 Difference]: With dead ends: 4597 [2021-11-23 02:29:29,012 INFO L226 Difference]: Without dead ends: 3436 [2021-11-23 02:29:29,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:29:29,021 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 247 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:29,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 401 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:29:29,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3436 states. [2021-11-23 02:29:29,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3436 to 3424. [2021-11-23 02:29:29,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3424 states, 2676 states have (on average 1.3800448430493273) internal successors, (3693), 2699 states have internal predecessors, (3693), 479 states have call successors, (479), 274 states have call predecessors, (479), 267 states have return successors, (642), 452 states have call predecessors, (642), 478 states have call successors, (642) [2021-11-23 02:29:29,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3424 states to 3424 states and 4814 transitions. [2021-11-23 02:29:29,357 INFO L78 Accepts]: Start accepts. Automaton has 3424 states and 4814 transitions. Word has length 101 [2021-11-23 02:29:29,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:29,358 INFO L470 AbstractCegarLoop]: Abstraction has 3424 states and 4814 transitions. [2021-11-23 02:29:29,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:29:29,358 INFO L276 IsEmpty]: Start isEmpty. Operand 3424 states and 4814 transitions. [2021-11-23 02:29:29,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 02:29:29,367 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:29,368 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:29:29,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:29:29,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-23 02:29:29,586 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:29:29,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:29,587 INFO L85 PathProgramCache]: Analyzing trace with hash -511602699, now seen corresponding path program 1 times [2021-11-23 02:29:29,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:29,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793456307] [2021-11-23 02:29:29,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:29,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:29,687 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 02:29:29,688 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:29,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793456307] [2021-11-23 02:29:29,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793456307] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:29:29,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891201884] [2021-11-23 02:29:29,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:29,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:29:29,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:29:29,694 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:29:29,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:29:29,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:29,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:29:29,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:29:30,057 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:29:30,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:29:30,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891201884] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:30,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:29:30,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-23 02:29:30,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441255972] [2021-11-23 02:29:30,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:30,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:29:30,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:30,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:29:30,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:29:30,060 INFO L87 Difference]: Start difference. First operand 3424 states and 4814 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:29:30,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:30,454 INFO L93 Difference]: Finished difference Result 7921 states and 12007 transitions. [2021-11-23 02:29:30,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:29:30,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 101 [2021-11-23 02:29:30,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:30,490 INFO L225 Difference]: With dead ends: 7921 [2021-11-23 02:29:30,490 INFO L226 Difference]: Without dead ends: 5642 [2021-11-23 02:29:30,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:29:30,508 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 256 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:30,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 401 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:29:30,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5642 states. [2021-11-23 02:29:30,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5642 to 5620. [2021-11-23 02:29:30,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5620 states, 4464 states have (on average 1.412410394265233) internal successors, (6305), 4499 states have internal predecessors, (6305), 767 states have call successors, (767), 394 states have call predecessors, (767), 387 states have return successors, (1066), 728 states have call predecessors, (1066), 766 states have call successors, (1066) [2021-11-23 02:29:31,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5620 states to 5620 states and 8138 transitions. [2021-11-23 02:29:31,018 INFO L78 Accepts]: Start accepts. Automaton has 5620 states and 8138 transitions. Word has length 101 [2021-11-23 02:29:31,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:31,018 INFO L470 AbstractCegarLoop]: Abstraction has 5620 states and 8138 transitions. [2021-11-23 02:29:31,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:29:31,019 INFO L276 IsEmpty]: Start isEmpty. Operand 5620 states and 8138 transitions. [2021-11-23 02:29:31,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 02:29:31,041 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:31,042 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:29:31,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:29:31,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 02:29:31,270 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:29:31,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:31,271 INFO L85 PathProgramCache]: Analyzing trace with hash -8537161, now seen corresponding path program 1 times [2021-11-23 02:29:31,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:31,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032665077] [2021-11-23 02:29:31,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:31,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:31,355 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 02:29:31,355 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:31,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032665077] [2021-11-23 02:29:31,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032665077] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:31,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:29:31,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:29:31,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694928320] [2021-11-23 02:29:31,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:31,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:29:31,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:31,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:29:31,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:29:31,359 INFO L87 Difference]: Start difference. First operand 5620 states and 8138 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:29:31,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:31,876 INFO L93 Difference]: Finished difference Result 10230 states and 15503 transitions. [2021-11-23 02:29:31,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:29:31,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 101 [2021-11-23 02:29:31,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:31,913 INFO L225 Difference]: With dead ends: 10230 [2021-11-23 02:29:31,914 INFO L226 Difference]: Without dead ends: 6644 [2021-11-23 02:29:31,931 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:29:31,931 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 83 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:31,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 563 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:29:31,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6644 states. [2021-11-23 02:29:32,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6644 to 6260. [2021-11-23 02:29:32,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6260 states, 5072 states have (on average 1.449723974763407) internal successors, (7353), 5107 states have internal predecessors, (7353), 783 states have call successors, (783), 410 states have call predecessors, (783), 403 states have return successors, (1082), 744 states have call predecessors, (1082), 782 states have call successors, (1082) [2021-11-23 02:29:32,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6260 states to 6260 states and 9218 transitions. [2021-11-23 02:29:32,386 INFO L78 Accepts]: Start accepts. Automaton has 6260 states and 9218 transitions. Word has length 101 [2021-11-23 02:29:32,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:32,386 INFO L470 AbstractCegarLoop]: Abstraction has 6260 states and 9218 transitions. [2021-11-23 02:29:32,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:29:32,387 INFO L276 IsEmpty]: Start isEmpty. Operand 6260 states and 9218 transitions. [2021-11-23 02:29:32,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 02:29:32,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:32,401 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:29:32,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 02:29:32,401 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:29:32,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:32,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1667601710, now seen corresponding path program 1 times [2021-11-23 02:29:32,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:32,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031942580] [2021-11-23 02:29:32,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:32,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:32,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:32,475 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 02:29:32,475 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:32,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031942580] [2021-11-23 02:29:32,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031942580] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:29:32,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647398964] [2021-11-23 02:29:32,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:32,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:29:32,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:29:32,477 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:29:32,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:29:32,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:32,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:29:32,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:29:32,962 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:29:32,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:29:32,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647398964] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:32,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:29:32,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-11-23 02:29:32,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951693004] [2021-11-23 02:29:32,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:32,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:29:32,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:32,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:29:32,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-23 02:29:32,966 INFO L87 Difference]: Start difference. First operand 6260 states and 9218 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) [2021-11-23 02:29:33,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:33,554 INFO L93 Difference]: Finished difference Result 7046 states and 10113 transitions. [2021-11-23 02:29:33,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:29:33,554 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 [2021-11-23 02:29:33,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:33,582 INFO L225 Difference]: With dead ends: 7046 [2021-11-23 02:29:33,582 INFO L226 Difference]: Without dead ends: 5988 [2021-11-23 02:29:33,589 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:29:33,589 INFO L933 BasicCegarLoop]: 283 mSDtfsCounter, 70 mSDsluCounter, 965 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:33,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 1102 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:29:33,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5988 states. [2021-11-23 02:29:34,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5988 to 5870. [2021-11-23 02:29:34,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5870 states, 4792 states have (on average 1.4657762938230383) internal successors, (7024), 4821 states have internal predecessors, (7024), 724 states have call successors, (724), 355 states have call predecessors, (724), 352 states have return successors, (1013), 695 states have call predecessors, (1013), 723 states have call successors, (1013) [2021-11-23 02:29:34,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5870 states to 5870 states and 8761 transitions. [2021-11-23 02:29:34,053 INFO L78 Accepts]: Start accepts. Automaton has 5870 states and 8761 transitions. Word has length 112 [2021-11-23 02:29:34,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:34,054 INFO L470 AbstractCegarLoop]: Abstraction has 5870 states and 8761 transitions. [2021-11-23 02:29:34,054 INFO L471 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) [2021-11-23 02:29:34,055 INFO L276 IsEmpty]: Start isEmpty. Operand 5870 states and 8761 transitions. [2021-11-23 02:29:34,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-23 02:29:34,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:34,069 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:29:34,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:29:34,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 02:29:34,290 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:29:34,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:34,291 INFO L85 PathProgramCache]: Analyzing trace with hash 892190063, now seen corresponding path program 1 times [2021-11-23 02:29:34,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:34,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542790553] [2021-11-23 02:29:34,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:34,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:34,345 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-23 02:29:34,345 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:34,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542790553] [2021-11-23 02:29:34,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542790553] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:34,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:29:34,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:29:34,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830952618] [2021-11-23 02:29:34,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:34,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:29:34,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:34,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:29:34,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:29:34,351 INFO L87 Difference]: Start difference. First operand 5870 states and 8761 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-23 02:29:34,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:34,851 INFO L93 Difference]: Finished difference Result 6363 states and 9319 transitions. [2021-11-23 02:29:34,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:29:34,852 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 113 [2021-11-23 02:29:34,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:34,877 INFO L225 Difference]: With dead ends: 6363 [2021-11-23 02:29:34,878 INFO L226 Difference]: Without dead ends: 5737 [2021-11-23 02:29:34,883 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:29:34,884 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 308 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:34,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 465 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:29:34,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5737 states. [2021-11-23 02:29:35,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5737 to 5690. [2021-11-23 02:29:35,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5690 states, 4664 states have (on average 1.474056603773585) internal successors, (6875), 4691 states have internal predecessors, (6875), 696 states have call successors, (696), 329 states have call predecessors, (696), 328 states have return successors, (983), 671 states have call predecessors, (983), 695 states have call successors, (983) [2021-11-23 02:29:35,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5690 states to 5690 states and 8554 transitions. [2021-11-23 02:29:35,493 INFO L78 Accepts]: Start accepts. Automaton has 5690 states and 8554 transitions. Word has length 113 [2021-11-23 02:29:35,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:35,493 INFO L470 AbstractCegarLoop]: Abstraction has 5690 states and 8554 transitions. [2021-11-23 02:29:35,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-23 02:29:35,494 INFO L276 IsEmpty]: Start isEmpty. Operand 5690 states and 8554 transitions. [2021-11-23 02:29:35,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-23 02:29:35,508 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:35,509 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:29:35,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 02:29:35,509 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:29:35,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:35,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1849118446, now seen corresponding path program 1 times [2021-11-23 02:29:35,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:35,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674942057] [2021-11-23 02:29:35,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:35,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:35,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:35,610 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-23 02:29:35,610 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:35,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674942057] [2021-11-23 02:29:35,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674942057] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:29:35,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159371789] [2021-11-23 02:29:35,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:35,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:29:35,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:29:35,614 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:29:35,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 02:29:35,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:35,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:29:35,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:29:35,955 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 02:29:35,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:29:35,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159371789] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:35,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:29:35,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2021-11-23 02:29:35,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163953060] [2021-11-23 02:29:35,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:35,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:29:35,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:35,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:29:35,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:29:35,958 INFO L87 Difference]: Start difference. First operand 5690 states and 8554 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) [2021-11-23 02:29:36,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:36,506 INFO L93 Difference]: Finished difference Result 6439 states and 9399 transitions. [2021-11-23 02:29:36,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:29:36,507 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 [2021-11-23 02:29:36,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:36,533 INFO L225 Difference]: With dead ends: 6439 [2021-11-23 02:29:36,534 INFO L226 Difference]: Without dead ends: 5982 [2021-11-23 02:29:36,539 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:29:36,540 INFO L933 BasicCegarLoop]: 274 mSDtfsCounter, 239 mSDsluCounter, 1042 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:36,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 1157 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:29:36,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5982 states. [2021-11-23 02:29:36,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5982 to 5948. [2021-11-23 02:29:36,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5948 states, 4826 states have (on average 1.4618731869042685) internal successors, (7055), 4859 states have internal predecessors, (7055), 744 states have call successors, (744), 371 states have call predecessors, (744), 376 states have return successors, (1043), 719 states have call predecessors, (1043), 743 states have call successors, (1043) [2021-11-23 02:29:36,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5948 states to 5948 states and 8842 transitions. [2021-11-23 02:29:36,980 INFO L78 Accepts]: Start accepts. Automaton has 5948 states and 8842 transitions. Word has length 113 [2021-11-23 02:29:36,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:36,981 INFO L470 AbstractCegarLoop]: Abstraction has 5948 states and 8842 transitions. [2021-11-23 02:29:36,981 INFO L471 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) [2021-11-23 02:29:36,981 INFO L276 IsEmpty]: Start isEmpty. Operand 5948 states and 8842 transitions. [2021-11-23 02:29:36,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-23 02:29:36,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:36,996 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:29:37,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 02:29:37,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:29:37,214 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:29:37,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:37,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1204142891, now seen corresponding path program 1 times [2021-11-23 02:29:37,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:37,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745956703] [2021-11-23 02:29:37,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:37,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:37,637 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 02:29:37,637 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:37,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745956703] [2021-11-23 02:29:37,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745956703] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:29:37,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515706007] [2021-11-23 02:29:37,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:37,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:29:37,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:29:37,642 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:29:37,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 02:29:37,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:37,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-23 02:29:37,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:29:38,927 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:29:38,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:29:41,057 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 02:29:41,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515706007] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:29:41,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1150592063] [2021-11-23 02:29:41,061 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2021-11-23 02:29:41,062 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:29:41,063 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:29:41,063 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:29:41,063 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:30:24,658 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 272 for LOIs [2021-11-23 02:30:25,329 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 223 for LOIs [2021-11-23 02:30:25,394 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 214 for LOIs [2021-11-23 02:30:25,462 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 284 for LOIs [2021-11-23 02:30:27,123 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 162 for LOIs [2021-11-23 02:30:27,367 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 108 for LOIs [2021-11-23 02:30:27,578 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 276 for LOIs [2021-11-23 02:30:28,217 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 299 for LOIs [2021-11-23 02:30:28,616 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:31:26,056 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '188237#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (<= 0 ~c_dr_pc~0) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t6_st~0) (= ~t4_i~0 0) (= ~T7_E~0 2) (<= 2 ~E_6~0) (= ~m_i~0 0) (<= ~t2_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~E_4~0 2) (<= 2 ~E_7~0) (= ~E_2~0 2) (<= ~E_6~0 2) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~token~0 0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (= ~E_M~0 2) (<= 0 ~t3_pc~0) (= 0 ~t2_st~0) (<= 2 ~E_5~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (= ~M_E~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (<= ~E_7~0 2) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2021-11-23 02:31:26,056 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:31:26,056 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:31:26,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 16] total 51 [2021-11-23 02:31:26,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113585172] [2021-11-23 02:31:26,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:31:26,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-23 02:31:26,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:31:26,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-23 02:31:26,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=10774, Unknown=0, NotChecked=0, Total=11556 [2021-11-23 02:31:26,063 INFO L87 Difference]: Start difference. First operand 5948 states and 8842 transitions. Second operand has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2021-11-23 02:31:47,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:31:47,397 INFO L93 Difference]: Finished difference Result 8819 states and 12333 transitions. [2021-11-23 02:31:47,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 255 states. [2021-11-23 02:31:47,398 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) Word has length 114 [2021-11-23 02:31:47,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:31:47,429 INFO L225 Difference]: With dead ends: 8819 [2021-11-23 02:31:47,430 INFO L226 Difference]: Without dead ends: 8101 [2021-11-23 02:31:47,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 288 SyntacticMatches, 4 SemanticMatches, 356 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52606 ImplicationChecksByTransitivity, 73.7s TimeCoverageRelationStatistics Valid=11538, Invalid=116268, Unknown=0, NotChecked=0, Total=127806 [2021-11-23 02:31:47,461 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 5234 mSDsluCounter, 3740 mSDsCounter, 0 mSdLazyCounter, 8737 mSolverCounterSat, 3328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5234 SdHoareTripleChecker+Valid, 3548 SdHoareTripleChecker+Invalid, 12065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3328 IncrementalHoareTripleChecker+Valid, 8737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:31:47,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5234 Valid, 3548 Invalid, 12065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3328 Valid, 8737 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-11-23 02:31:47,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8101 states. [2021-11-23 02:31:47,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8101 to 6223. [2021-11-23 02:31:47,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6223 states, 5009 states have (on average 1.450189658614494) internal successors, (7264), 5044 states have internal predecessors, (7264), 789 states have call successors, (789), 408 states have call predecessors, (789), 423 states have return successors, (1100), 772 states have call predecessors, (1100), 788 states have call successors, (1100) [2021-11-23 02:31:48,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6223 states to 6223 states and 9153 transitions. [2021-11-23 02:31:48,020 INFO L78 Accepts]: Start accepts. Automaton has 6223 states and 9153 transitions. Word has length 114 [2021-11-23 02:31:48,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:31:48,021 INFO L470 AbstractCegarLoop]: Abstraction has 6223 states and 9153 transitions. [2021-11-23 02:31:48,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2021-11-23 02:31:48,022 INFO L276 IsEmpty]: Start isEmpty. Operand 6223 states and 9153 transitions. [2021-11-23 02:31:48,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-23 02:31:48,037 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:31:48,037 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:31:48,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 02:31:48,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-23 02:31:48,254 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:31:48,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:31:48,255 INFO L85 PathProgramCache]: Analyzing trace with hash 2135928949, now seen corresponding path program 1 times [2021-11-23 02:31:48,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:31:48,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42006024] [2021-11-23 02:31:48,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:31:48,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:31:48,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:31:48,419 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:31:48,420 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:31:48,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42006024] [2021-11-23 02:31:48,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42006024] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:31:48,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666175309] [2021-11-23 02:31:48,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:31:48,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:31:48,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:31:48,422 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:31:48,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 02:31:48,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:31:48,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 02:31:48,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:31:48,780 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 02:31:48,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:31:49,093 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 02:31:49,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666175309] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:31:49,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:31:49,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2021-11-23 02:31:49,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127722672] [2021-11-23 02:31:49,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:31:49,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:31:49,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:31:49,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:31:49,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:31:49,095 INFO L87 Difference]: Start difference. First operand 6223 states and 9153 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) [2021-11-23 02:31:50,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:31:50,008 INFO L93 Difference]: Finished difference Result 7547 states and 10701 transitions. [2021-11-23 02:31:50,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 02:31:50,009 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 [2021-11-23 02:31:50,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:31:50,033 INFO L225 Difference]: With dead ends: 7547 [2021-11-23 02:31:50,034 INFO L226 Difference]: Without dead ends: 6556 [2021-11-23 02:31:50,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-11-23 02:31:50,039 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 378 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:31:50,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 796 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:31:50,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6556 states. [2021-11-23 02:31:50,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6556 to 6303. [2021-11-23 02:31:50,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6303 states, 5054 states have (on average 1.4473684210526316) internal successors, (7315), 5092 states have internal predecessors, (7315), 808 states have call successors, (808), 417 states have call predecessors, (808), 439 states have return successors, (1140), 795 states have call predecessors, (1140), 807 states have call successors, (1140) [2021-11-23 02:31:50,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6303 states to 6303 states and 9263 transitions. [2021-11-23 02:31:50,620 INFO L78 Accepts]: Start accepts. Automaton has 6303 states and 9263 transitions. Word has length 115 [2021-11-23 02:31:50,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:31:50,620 INFO L470 AbstractCegarLoop]: Abstraction has 6303 states and 9263 transitions. [2021-11-23 02:31:50,620 INFO L471 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) [2021-11-23 02:31:50,621 INFO L276 IsEmpty]: Start isEmpty. Operand 6303 states and 9263 transitions. [2021-11-23 02:31:50,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-23 02:31:50,634 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:31:50,634 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:31:50,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 02:31:50,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-23 02:31:50,854 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:31:50,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:31:50,854 INFO L85 PathProgramCache]: Analyzing trace with hash -795443035, now seen corresponding path program 1 times [2021-11-23 02:31:50,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:31:50,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998346660] [2021-11-23 02:31:50,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:31:50,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:31:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:31:51,265 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 02:31:51,265 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:31:51,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998346660] [2021-11-23 02:31:51,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998346660] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:31:51,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642991955] [2021-11-23 02:31:51,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:31:51,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:31:51,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:31:51,267 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:31:51,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 02:31:51,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:31:51,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-23 02:31:51,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:31:52,392 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:31:52,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:31:54,128 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 02:31:54,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642991955] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:31:54,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [88271874] [2021-11-23 02:31:54,132 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2021-11-23 02:31:54,132 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:31:54,133 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:31:54,133 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:31:54,133 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:32:05,688 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 272 for LOIs [2021-11-23 02:32:06,179 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 222 for LOIs [2021-11-23 02:32:06,242 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 110 for LOIs [2021-11-23 02:32:06,256 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 284 for LOIs [2021-11-23 02:32:08,054 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 162 for LOIs [2021-11-23 02:32:08,316 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 110 for LOIs [2021-11-23 02:32:08,532 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 276 for LOIs [2021-11-23 02:32:09,145 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 299 for LOIs [2021-11-23 02:32:09,551 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:33:09,730 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '231689#(and (= ~q_req_up~0 1) (or (and (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t6_st~0) (= ~t2_i~0 0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~E_2~0 2) (= ~p_dw_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~token~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~E_M~0 2) (= 0 ~t2_st~0) (= ~E_1~0 2) (= ~M_E~0 2) (= ~t1_i~0 0) (= |#NULL.base| 0)) (and (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t6_st~0) (= ~t2_i~0 0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~p_dw_pc~0 1) (= ~E_2~0 2) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~token~0 0) (= 2 ~p_dw_st~0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~E_M~0 2) (= 0 ~t2_st~0) (= ~E_1~0 2) (= ~M_E~0 2) (= ~t1_i~0 0) (= |#NULL.base| 0))) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~c_dr_pc~0 1) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~q_buf_0~0) (<= ~t3_st~0 0) (<= ~c_num_read~0 1) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= 0 ~t3_pc~0) (<= 2 ~E_5~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= ~t4_pc~0 0) (<= 0 ~t4_pc~0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0))' at error location [2021-11-23 02:33:09,730 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:33:09,730 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:33:09,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 55 [2021-11-23 02:33:09,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309470936] [2021-11-23 02:33:09,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:33:09,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-23 02:33:09,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:33:09,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-23 02:33:09,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=953, Invalid=11703, Unknown=0, NotChecked=0, Total=12656 [2021-11-23 02:33:09,734 INFO L87 Difference]: Start difference. First operand 6303 states and 9263 transitions. Second operand has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2021-11-23 02:33:23,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:33:23,934 INFO L93 Difference]: Finished difference Result 8587 states and 11965 transitions. [2021-11-23 02:33:23,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2021-11-23 02:33:23,934 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) Word has length 124 [2021-11-23 02:33:23,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:33:23,964 INFO L225 Difference]: With dead ends: 8587 [2021-11-23 02:33:23,964 INFO L226 Difference]: Without dead ends: 7516 [2021-11-23 02:33:23,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 321 SyntacticMatches, 1 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26843 ImplicationChecksByTransitivity, 69.3s TimeCoverageRelationStatistics Valid=6751, Invalid=62681, Unknown=0, NotChecked=0, Total=69432 [2021-11-23 02:33:23,979 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 5678 mSDsluCounter, 3364 mSDsCounter, 0 mSdLazyCounter, 8458 mSolverCounterSat, 3856 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5678 SdHoareTripleChecker+Valid, 3117 SdHoareTripleChecker+Invalid, 12314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3856 IncrementalHoareTripleChecker+Valid, 8458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:33:23,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5678 Valid, 3117 Invalid, 12314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3856 Valid, 8458 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-11-23 02:33:23,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7516 states. [2021-11-23 02:33:24,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7516 to 6119. [2021-11-23 02:33:24,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6119 states, 4942 states have (on average 1.4542695265074868) internal successors, (7187), 4979 states have internal predecessors, (7187), 768 states have call successors, (768), 385 states have call predecessors, (768), 407 states have return successors, (1090), 756 states have call predecessors, (1090), 767 states have call successors, (1090) [2021-11-23 02:33:24,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6119 states to 6119 states and 9045 transitions. [2021-11-23 02:33:24,699 INFO L78 Accepts]: Start accepts. Automaton has 6119 states and 9045 transitions. Word has length 124 [2021-11-23 02:33:24,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:33:24,699 INFO L470 AbstractCegarLoop]: Abstraction has 6119 states and 9045 transitions. [2021-11-23 02:33:24,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2021-11-23 02:33:24,700 INFO L276 IsEmpty]: Start isEmpty. Operand 6119 states and 9045 transitions. [2021-11-23 02:33:24,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-23 02:33:24,714 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:33:24,714 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:33:24,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 02:33:24,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:33:24,942 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:33:24,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:33:24,942 INFO L85 PathProgramCache]: Analyzing trace with hash 659710019, now seen corresponding path program 1 times [2021-11-23 02:33:24,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:33:24,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995636093] [2021-11-23 02:33:24,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:24,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:33:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:25,034 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-23 02:33:25,035 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:33:25,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995636093] [2021-11-23 02:33:25,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995636093] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:33:25,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854108712] [2021-11-23 02:33:25,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:25,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:33:25,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:33:25,037 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:33:25,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 02:33:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:25,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 02:33:25,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:33:25,443 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-23 02:33:25,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:33:25,760 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-23 02:33:25,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854108712] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:33:25,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:33:25,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2021-11-23 02:33:25,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181988322] [2021-11-23 02:33:25,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:33:25,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:33:25,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:33:25,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:33:25,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-23 02:33:25,762 INFO L87 Difference]: Start difference. First operand 6119 states and 9045 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) [2021-11-23 02:33:26,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:33:26,752 INFO L93 Difference]: Finished difference Result 6774 states and 9786 transitions. [2021-11-23 02:33:26,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 02:33:26,753 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 [2021-11-23 02:33:26,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:33:26,779 INFO L225 Difference]: With dead ends: 6774 [2021-11-23 02:33:26,780 INFO L226 Difference]: Without dead ends: 5887 [2021-11-23 02:33:26,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-11-23 02:33:26,787 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 579 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:33:26,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [581 Valid, 726 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:33:26,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5887 states. [2021-11-23 02:33:27,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5887 to 5850. [2021-11-23 02:33:27,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5850 states, 4743 states have (on average 1.4636306135357369) internal successors, (6942), 4780 states have internal predecessors, (6942), 732 states have call successors, (732), 355 states have call predecessors, (732), 373 states have return successors, (1049), 716 states have call predecessors, (1049), 731 states have call successors, (1049) [2021-11-23 02:33:27,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5850 states to 5850 states and 8723 transitions. [2021-11-23 02:33:27,440 INFO L78 Accepts]: Start accepts. Automaton has 5850 states and 8723 transitions. Word has length 125 [2021-11-23 02:33:27,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:33:27,441 INFO L470 AbstractCegarLoop]: Abstraction has 5850 states and 8723 transitions. [2021-11-23 02:33:27,441 INFO L471 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) [2021-11-23 02:33:27,441 INFO L276 IsEmpty]: Start isEmpty. Operand 5850 states and 8723 transitions. [2021-11-23 02:33:27,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-23 02:33:27,462 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:33:27,462 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:33:27,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 02:33:27,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:33:27,686 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:33:27,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:33:27,686 INFO L85 PathProgramCache]: Analyzing trace with hash -2137145289, now seen corresponding path program 1 times [2021-11-23 02:33:27,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:33:27,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468658218] [2021-11-23 02:33:27,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:27,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:33:27,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:27,750 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-23 02:33:27,750 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:33:27,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468658218] [2021-11-23 02:33:27,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468658218] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:33:27,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:33:27,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:33:27,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976698586] [2021-11-23 02:33:27,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:33:27,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:33:27,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:33:27,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:33:27,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:33:27,754 INFO L87 Difference]: Start difference. First operand 5850 states and 8723 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 02:33:28,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:33:28,599 INFO L93 Difference]: Finished difference Result 15903 states and 24764 transitions. [2021-11-23 02:33:28,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:33:28,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 136 [2021-11-23 02:33:28,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:33:28,648 INFO L225 Difference]: With dead ends: 15903 [2021-11-23 02:33:28,648 INFO L226 Difference]: Without dead ends: 10788 [2021-11-23 02:33:28,675 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:33:28,676 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 246 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 402 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 [2021-11-23 02:33:28,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 402 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:33:28,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10788 states. [2021-11-23 02:33:29,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10788 to 10730. [2021-11-23 02:33:29,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10730 states, 8795 states have (on average 1.4724275156338829) internal successors, (12950), 8856 states have internal predecessors, (12950), 1304 states have call successors, (1304), 611 states have call predecessors, (1304), 629 states have return successors, (1877), 1264 states have call predecessors, (1877), 1303 states have call successors, (1877) [2021-11-23 02:33:29,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10730 states to 10730 states and 16131 transitions. [2021-11-23 02:33:29,674 INFO L78 Accepts]: Start accepts. Automaton has 10730 states and 16131 transitions. Word has length 136 [2021-11-23 02:33:29,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:33:29,674 INFO L470 AbstractCegarLoop]: Abstraction has 10730 states and 16131 transitions. [2021-11-23 02:33:29,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 02:33:29,675 INFO L276 IsEmpty]: Start isEmpty. Operand 10730 states and 16131 transitions. [2021-11-23 02:33:29,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-23 02:33:29,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:33:29,698 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:33:29,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-23 02:33:29,699 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:33:29,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:33:29,699 INFO L85 PathProgramCache]: Analyzing trace with hash -534157951, now seen corresponding path program 1 times [2021-11-23 02:33:29,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:33:29,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580744940] [2021-11-23 02:33:29,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:29,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:33:29,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:29,757 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-23 02:33:29,757 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:33:29,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580744940] [2021-11-23 02:33:29,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580744940] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:33:29,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:33:29,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:33:29,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748012769] [2021-11-23 02:33:29,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:33:29,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:33:29,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:33:29,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:33:29,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:33:29,760 INFO L87 Difference]: Start difference. First operand 10730 states and 16131 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 02:33:31,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:33:31,276 INFO L93 Difference]: Finished difference Result 30367 states and 47144 transitions. [2021-11-23 02:33:31,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:33:31,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 136 [2021-11-23 02:33:31,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:33:31,348 INFO L225 Difference]: With dead ends: 30367 [2021-11-23 02:33:31,348 INFO L226 Difference]: Without dead ends: 20372 [2021-11-23 02:33:31,385 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:33:31,386 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 248 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 402 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 [2021-11-23 02:33:31,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 402 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:33:31,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20372 states. [2021-11-23 02:33:33,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20372 to 20258. [2021-11-23 02:33:33,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20258 states, 16707 states have (on average 1.4713593104686657) internal successors, (24582), 16816 states have internal predecessors, (24582), 2408 states have call successors, (2408), 1123 states have call predecessors, (2408), 1141 states have return successors, (3461), 2320 states have call predecessors, (3461), 2407 states have call successors, (3461) [2021-11-23 02:33:33,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20258 states to 20258 states and 30451 transitions. [2021-11-23 02:33:33,209 INFO L78 Accepts]: Start accepts. Automaton has 20258 states and 30451 transitions. Word has length 136 [2021-11-23 02:33:33,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:33:33,209 INFO L470 AbstractCegarLoop]: Abstraction has 20258 states and 30451 transitions. [2021-11-23 02:33:33,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 02:33:33,210 INFO L276 IsEmpty]: Start isEmpty. Operand 20258 states and 30451 transitions. [2021-11-23 02:33:33,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-23 02:33:33,239 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:33:33,240 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:33:33,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-23 02:33:33,240 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:33:33,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:33:33,241 INFO L85 PathProgramCache]: Analyzing trace with hash 399066693, now seen corresponding path program 1 times [2021-11-23 02:33:33,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:33:33,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197370521] [2021-11-23 02:33:33,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:33,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:33:33,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:33,297 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-23 02:33:33,298 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:33:33,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197370521] [2021-11-23 02:33:33,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197370521] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:33:33,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:33:33,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:33:33,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007071713] [2021-11-23 02:33:33,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:33:33,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:33:33,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:33:33,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:33:33,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:33:33,300 INFO L87 Difference]: Start difference. First operand 20258 states and 30451 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 02:33:36,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:33:36,260 INFO L93 Difference]: Finished difference Result 58599 states and 90344 transitions. [2021-11-23 02:33:36,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:33:36,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 136 [2021-11-23 02:33:36,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:33:36,381 INFO L225 Difference]: With dead ends: 58599 [2021-11-23 02:33:36,382 INFO L226 Difference]: Without dead ends: 39076 [2021-11-23 02:33:36,433 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:33:36,433 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 251 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 402 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 [2021-11-23 02:33:36,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 402 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:33:36,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39076 states. [2021-11-23 02:33:39,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39076 to 38850. [2021-11-23 02:33:39,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38850 states, 32147 states have (on average 1.4644601362491056) internal successors, (47078), 32352 states have internal predecessors, (47078), 4536 states have call successors, (4536), 2147 states have call predecessors, (4536), 2165 states have return successors, (6485), 4352 states have call predecessors, (6485), 4535 states have call successors, (6485) [2021-11-23 02:33:39,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38850 states to 38850 states and 58099 transitions. [2021-11-23 02:33:39,986 INFO L78 Accepts]: Start accepts. Automaton has 38850 states and 58099 transitions. Word has length 136 [2021-11-23 02:33:39,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:33:39,986 INFO L470 AbstractCegarLoop]: Abstraction has 38850 states and 58099 transitions. [2021-11-23 02:33:39,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 02:33:39,987 INFO L276 IsEmpty]: Start isEmpty. Operand 38850 states and 58099 transitions. [2021-11-23 02:33:40,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-23 02:33:40,087 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:33:40,087 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:33:40,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-23 02:33:40,088 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:33:40,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:33:40,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1107251036, now seen corresponding path program 1 times [2021-11-23 02:33:40,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:33:40,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144483828] [2021-11-23 02:33:40,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:40,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:33:40,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:40,160 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-23 02:33:40,160 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:33:40,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144483828] [2021-11-23 02:33:40,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144483828] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:33:40,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700597106] [2021-11-23 02:33:40,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:40,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:33:40,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:33:40,162 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:33:40,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 02:33:40,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:40,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:33:40,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:33:40,675 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-23 02:33:40,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:33:40,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700597106] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:33:40,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:33:40,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-23 02:33:40,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517882552] [2021-11-23 02:33:40,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:33:40,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:33:40,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:33:40,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:33:40,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:33:40,677 INFO L87 Difference]: Start difference. First operand 38850 states and 58099 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:33:44,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:33:44,233 INFO L93 Difference]: Finished difference Result 71869 states and 107304 transitions. [2021-11-23 02:33:44,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:33:44,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 156 [2021-11-23 02:33:44,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:33:44,401 INFO L225 Difference]: With dead ends: 71869 [2021-11-23 02:33:44,401 INFO L226 Difference]: Without dead ends: 49339 [2021-11-23 02:33:44,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:33:44,465 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 243 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:33:44,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 303 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:33:44,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49339 states. [2021-11-23 02:33:48,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49339 to 49339. [2021-11-23 02:33:48,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49339 states, 41681 states have (on average 1.4165687003670737) internal successors, (59044), 41886 states have internal predecessors, (59044), 4853 states have call successors, (4853), 2784 states have call predecessors, (4853), 2803 states have return successors, (7056), 4670 states have call predecessors, (7056), 4852 states have call successors, (7056) [2021-11-23 02:33:48,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49339 states to 49339 states and 70953 transitions. [2021-11-23 02:33:48,779 INFO L78 Accepts]: Start accepts. Automaton has 49339 states and 70953 transitions. Word has length 156 [2021-11-23 02:33:48,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:33:48,780 INFO L470 AbstractCegarLoop]: Abstraction has 49339 states and 70953 transitions. [2021-11-23 02:33:48,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:33:48,780 INFO L276 IsEmpty]: Start isEmpty. Operand 49339 states and 70953 transitions. [2021-11-23 02:33:48,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-23 02:33:48,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:33:48,860 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:33:48,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 02:33:49,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-23 02:33:49,062 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:33:49,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:33:49,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1630571707, now seen corresponding path program 1 times [2021-11-23 02:33:49,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:33:49,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699752346] [2021-11-23 02:33:49,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:49,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:33:49,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:49,135 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-23 02:33:49,135 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:33:49,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699752346] [2021-11-23 02:33:49,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699752346] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:33:49,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011630975] [2021-11-23 02:33:49,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:49,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:33:49,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:33:49,151 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:33:49,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 02:33:49,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:49,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:33:49,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:33:49,530 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 02:33:49,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:33:49,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011630975] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:33:49,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:33:49,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-23 02:33:49,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371894012] [2021-11-23 02:33:49,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:33:49,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:33:49,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:33:49,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:33:49,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:33:49,532 INFO L87 Difference]: Start difference. First operand 49339 states and 70953 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:33:54,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:33:54,286 INFO L93 Difference]: Finished difference Result 94188 states and 137619 transitions. [2021-11-23 02:33:54,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:33:54,286 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 156 [2021-11-23 02:33:54,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:33:54,493 INFO L225 Difference]: With dead ends: 94188 [2021-11-23 02:33:54,493 INFO L226 Difference]: Without dead ends: 69338 [2021-11-23 02:33:54,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:33:54,550 INFO L933 BasicCegarLoop]: 355 mSDtfsCounter, 126 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:33:54,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 598 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:33:54,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69338 states. [2021-11-23 02:33:59,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69338 to 57035. [2021-11-23 02:33:59,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57035 states, 48929 states have (on average 1.4578675223282715) internal successors, (71332), 49134 states have internal predecessors, (71332), 5077 states have call successors, (5077), 3008 states have call predecessors, (5077), 3027 states have return successors, (7280), 4894 states have call predecessors, (7280), 5076 states have call successors, (7280) [2021-11-23 02:33:59,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57035 states to 57035 states and 83689 transitions. [2021-11-23 02:33:59,329 INFO L78 Accepts]: Start accepts. Automaton has 57035 states and 83689 transitions. Word has length 156 [2021-11-23 02:33:59,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:33:59,330 INFO L470 AbstractCegarLoop]: Abstraction has 57035 states and 83689 transitions. [2021-11-23 02:33:59,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:33:59,330 INFO L276 IsEmpty]: Start isEmpty. Operand 57035 states and 83689 transitions. [2021-11-23 02:33:59,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-23 02:33:59,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:33:59,441 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:33:59,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-23 02:33:59,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-23 02:33:59,642 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:33:59,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:33:59,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1743385748, now seen corresponding path program 2 times [2021-11-23 02:33:59,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:33:59,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829721053] [2021-11-23 02:33:59,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:59,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:33:59,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:59,716 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 50 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-23 02:33:59,716 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:33:59,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829721053] [2021-11-23 02:33:59,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829721053] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:33:59,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885153025] [2021-11-23 02:33:59,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:33:59,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:33:59,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:33:59,718 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:33:59,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8fb6bc1-3736-44a2-9933-fad561c60f46/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 02:33:59,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 02:33:59,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:33:59,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:33:59,892 INFO L286 TraceCheckSpWp]: Computing forward predicates...