./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.09.cil.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_9022028e-7a06-464f-bd8b-5a483b6775e3/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9022028e-7a06-464f-bd8b-5a483b6775e3/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_9022028e-7a06-464f-bd8b-5a483b6775e3/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9022028e-7a06-464f-bd8b-5a483b6775e3/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9022028e-7a06-464f-bd8b-5a483b6775e3/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_9022028e-7a06-464f-bd8b-5a483b6775e3/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 3945fa4b58cef50cb4b44b435a699812e99a1f6375664d08551274c6b50bee45 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 01:56:12,475 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 01:56:12,479 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 01:56:12,542 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 01:56:12,543 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 01:56:12,548 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 01:56:12,551 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 01:56:12,555 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 01:56:12,558 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 01:56:12,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 01:56:12,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 01:56:12,566 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 01:56:12,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 01:56:12,570 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 01:56:12,572 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 01:56:12,578 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 01:56:12,580 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 01:56:12,581 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 01:56:12,584 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 01:56:12,595 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 01:56:12,597 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 01:56:12,599 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 01:56:12,602 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 01:56:12,603 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 01:56:12,607 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 01:56:12,608 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 01:56:12,608 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 01:56:12,610 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 01:56:12,611 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 01:56:12,613 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 01:56:12,613 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 01:56:12,614 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 01:56:12,616 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 01:56:12,617 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 01:56:12,619 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 01:56:12,619 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 01:56:12,620 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 01:56:12,621 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 01:56:12,621 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 01:56:12,622 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 01:56:12,623 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 01:56:12,628 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9022028e-7a06-464f-bd8b-5a483b6775e3/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 01:56:12,655 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 01:56:12,655 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 01:56:12,655 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 01:56:12,656 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 01:56:12,656 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 01:56:12,656 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 01:56:12,657 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 01:56:12,657 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 01:56:12,657 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 01:56:12,657 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 01:56:12,658 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 01:56:12,658 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 01:56:12,658 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 01:56:12,658 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 01:56:12,658 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 01:56:12,659 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 01:56:12,659 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 01:56:12,659 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 01:56:12,660 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 01:56:12,660 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 01:56:12,660 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 01:56:12,660 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 01:56:12,660 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 01:56:12,661 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 01:56:12,661 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 01:56:12,661 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 01:56:12,661 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 01:56:12,661 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 01:56:12,662 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 01:56:12,662 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 01:56:12,662 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 01:56:12,662 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 01:56:12,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:56:12,663 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 01:56:12,663 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 01:56:12,663 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 01:56:12,663 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 01:56:12,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 01:56:12,664 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 01:56:12,664 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 01:56:12,664 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 01:56:12,664 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_9022028e-7a06-464f-bd8b-5a483b6775e3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9022028e-7a06-464f-bd8b-5a483b6775e3/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3945fa4b58cef50cb4b44b435a699812e99a1f6375664d08551274c6b50bee45 [2021-11-23 01:56:12,978 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 01:56:13,015 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 01:56:13,017 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 01:56:13,018 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 01:56:13,019 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 01:56:13,020 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9022028e-7a06-464f-bd8b-5a483b6775e3/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/systemc/transmitter.09.cil.c [2021-11-23 01:56:13,112 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9022028e-7a06-464f-bd8b-5a483b6775e3/bin/utaipan-EQgc7hIp5V/data/20143cd46/a618c194b83e44ed8619506befe5bc5e/FLAG8435da542 [2021-11-23 01:56:13,674 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 01:56:13,675 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9022028e-7a06-464f-bd8b-5a483b6775e3/sv-benchmarks/c/systemc/transmitter.09.cil.c [2021-11-23 01:56:13,688 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9022028e-7a06-464f-bd8b-5a483b6775e3/bin/utaipan-EQgc7hIp5V/data/20143cd46/a618c194b83e44ed8619506befe5bc5e/FLAG8435da542 [2021-11-23 01:56:13,984 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9022028e-7a06-464f-bd8b-5a483b6775e3/bin/utaipan-EQgc7hIp5V/data/20143cd46/a618c194b83e44ed8619506befe5bc5e [2021-11-23 01:56:13,987 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 01:56:13,990 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 01:56:13,994 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 01:56:13,995 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 01:56:13,998 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 01:56:13,999 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:56:13" (1/1) ... [2021-11-23 01:56:14,002 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bf07123 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:14, skipping insertion in model container [2021-11-23 01:56:14,003 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:56:13" (1/1) ... [2021-11-23 01:56:14,011 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 01:56:14,072 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 01:56:14,263 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_9022028e-7a06-464f-bd8b-5a483b6775e3/sv-benchmarks/c/systemc/transmitter.09.cil.c[706,719] [2021-11-23 01:56:14,393 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:56:14,404 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 01:56:14,416 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_9022028e-7a06-464f-bd8b-5a483b6775e3/sv-benchmarks/c/systemc/transmitter.09.cil.c[706,719] [2021-11-23 01:56:14,475 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:56:14,495 INFO L208 MainTranslator]: Completed translation [2021-11-23 01:56:14,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:14 WrapperNode [2021-11-23 01:56:14,495 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 01:56:14,497 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 01:56:14,497 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 01:56:14,497 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 01:56:14,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:14" (1/1) ... [2021-11-23 01:56:14,518 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:14" (1/1) ... [2021-11-23 01:56:14,567 INFO L137 Inliner]: procedures = 46, calls = 57, calls flagged for inlining = 30, calls inlined = 30, statements flattened = 663 [2021-11-23 01:56:14,568 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 01:56:14,568 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 01:56:14,569 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 01:56:14,569 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 01:56:14,577 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:14" (1/1) ... [2021-11-23 01:56:14,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:14" (1/1) ... [2021-11-23 01:56:14,582 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:14" (1/1) ... [2021-11-23 01:56:14,582 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:14" (1/1) ... [2021-11-23 01:56:14,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:14" (1/1) ... [2021-11-23 01:56:14,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:14" (1/1) ... [2021-11-23 01:56:14,613 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:14" (1/1) ... [2021-11-23 01:56:14,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 01:56:14,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 01:56:14,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 01:56:14,620 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 01:56:14,621 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:14" (1/1) ... [2021-11-23 01:56:14,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:56:14,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9022028e-7a06-464f-bd8b-5a483b6775e3/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:56:14,677 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9022028e-7a06-464f-bd8b-5a483b6775e3/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 01:56:14,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9022028e-7a06-464f-bd8b-5a483b6775e3/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 01:56:14,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 01:56:14,731 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-23 01:56:14,731 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-23 01:56:14,731 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-23 01:56:14,731 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-23 01:56:14,731 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-23 01:56:14,731 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-23 01:56:14,732 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-23 01:56:14,732 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-23 01:56:14,732 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-23 01:56:14,732 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-23 01:56:14,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 01:56:14,733 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-23 01:56:14,733 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-23 01:56:14,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 01:56:14,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 01:56:14,893 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 01:56:14,895 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 01:56:15,788 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 01:56:16,100 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 01:56:16,100 INFO L301 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-23 01:56:16,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:56:16 BoogieIcfgContainer [2021-11-23 01:56:16,103 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 01:56:16,105 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 01:56:16,106 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 01:56:16,109 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 01:56:16,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:56:13" (1/3) ... [2021-11-23 01:56:16,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a365b1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:56:16, skipping insertion in model container [2021-11-23 01:56:16,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:14" (2/3) ... [2021-11-23 01:56:16,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a365b1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:56:16, skipping insertion in model container [2021-11-23 01:56:16,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:56:16" (3/3) ... [2021-11-23 01:56:16,112 INFO L111 eAbstractionObserver]: Analyzing ICFG transmitter.09.cil.c [2021-11-23 01:56:16,118 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 01:56:16,118 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 01:56:16,169 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 01:56:16,176 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 01:56:16,177 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 01:56:16,198 INFO L276 IsEmpty]: Start isEmpty. Operand has 153 states, 123 states have (on average 1.5528455284552845) internal successors, (191), 125 states have internal predecessors, (191), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-23 01:56:16,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 01:56:16,209 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:56:16,210 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:56:16,210 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:56:16,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:56:16,216 INFO L85 PathProgramCache]: Analyzing trace with hash 451690190, now seen corresponding path program 1 times [2021-11-23 01:56:16,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:56:16,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477927610] [2021-11-23 01:56:16,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:56:16,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:56:16,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:56:16,601 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 01:56:16,603 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:56:16,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477927610] [2021-11-23 01:56:16,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477927610] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:56:16,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:56:16,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 01:56:16,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003625780] [2021-11-23 01:56:16,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:56:16,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 01:56:16,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:56:16,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 01:56:16,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 01:56:16,684 INFO L87 Difference]: Start difference. First operand has 153 states, 123 states have (on average 1.5528455284552845) internal successors, (191), 125 states have internal predecessors, (191), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 01:56:17,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:56:17,213 INFO L93 Difference]: Finished difference Result 442 states and 701 transitions. [2021-11-23 01:56:17,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 01:56:17,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 65 [2021-11-23 01:56:17,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:56:17,245 INFO L225 Difference]: With dead ends: 442 [2021-11-23 01:56:17,245 INFO L226 Difference]: Without dead ends: 290 [2021-11-23 01:56:17,258 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 01:56:17,262 INFO L933 BasicCegarLoop]: 354 mSDtfsCounter, 400 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 01:56:17,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 630 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 01:56:17,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-11-23 01:56:17,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 287. [2021-11-23 01:56:17,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 235 states have (on average 1.4978723404255319) internal successors, (352), 236 states have internal predecessors, (352), 39 states have call successors, (39), 12 states have call predecessors, (39), 12 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-11-23 01:56:17,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 430 transitions. [2021-11-23 01:56:17,336 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 430 transitions. Word has length 65 [2021-11-23 01:56:17,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:56:17,337 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 430 transitions. [2021-11-23 01:56:17,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 01:56:17,338 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 430 transitions. [2021-11-23 01:56:17,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 01:56:17,348 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:56:17,348 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:56:17,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 01:56:17,349 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:56:17,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:56:17,350 INFO L85 PathProgramCache]: Analyzing trace with hash -656438449, now seen corresponding path program 1 times [2021-11-23 01:56:17,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:56:17,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862111351] [2021-11-23 01:56:17,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:56:17,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:56:17,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:56:17,501 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 01:56:17,501 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:56:17,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862111351] [2021-11-23 01:56:17,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862111351] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:56:17,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:56:17,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 01:56:17,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224113969] [2021-11-23 01:56:17,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:56:17,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 01:56:17,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:56:17,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 01:56:17,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:56:17,506 INFO L87 Difference]: Start difference. First operand 287 states and 430 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 01:56:18,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:56:18,209 INFO L93 Difference]: Finished difference Result 979 states and 1483 transitions. [2021-11-23 01:56:18,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 01:56:18,210 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 65 [2021-11-23 01:56:18,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:56:18,217 INFO L225 Difference]: With dead ends: 979 [2021-11-23 01:56:18,217 INFO L226 Difference]: Without dead ends: 674 [2021-11-23 01:56:18,220 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 01:56:18,222 INFO L933 BasicCegarLoop]: 379 mSDtfsCounter, 832 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 01:56:18,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [842 Valid, 1006 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 01:56:18,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-11-23 01:56:18,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 662. [2021-11-23 01:56:18,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 557 states have (on average 1.4901256732495511) internal successors, (830), 550 states have internal predecessors, (830), 76 states have call successors, (76), 26 states have call predecessors, (76), 28 states have return successors, (86), 86 states have call predecessors, (86), 76 states have call successors, (86) [2021-11-23 01:56:18,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 992 transitions. [2021-11-23 01:56:18,303 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 992 transitions. Word has length 65 [2021-11-23 01:56:18,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:56:18,304 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 992 transitions. [2021-11-23 01:56:18,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 01:56:18,305 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 992 transitions. [2021-11-23 01:56:18,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 01:56:18,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:56:18,319 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:56:18,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 01:56:18,319 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:56:18,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:56:18,321 INFO L85 PathProgramCache]: Analyzing trace with hash 811764880, now seen corresponding path program 1 times [2021-11-23 01:56:18,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:56:18,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146693085] [2021-11-23 01:56:18,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:56:18,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:56:18,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:56:18,490 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 01:56:18,490 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:56:18,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146693085] [2021-11-23 01:56:18,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146693085] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:56:18,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:56:18,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 01:56:18,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168740955] [2021-11-23 01:56:18,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:56:18,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 01:56:18,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:56:18,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 01:56:18,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:56:18,496 INFO L87 Difference]: Start difference. First operand 662 states and 992 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 01:56:19,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:56:19,057 INFO L93 Difference]: Finished difference Result 2313 states and 3512 transitions. [2021-11-23 01:56:19,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 01:56:19,058 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 65 [2021-11-23 01:56:19,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:56:19,075 INFO L225 Difference]: With dead ends: 2313 [2021-11-23 01:56:19,075 INFO L226 Difference]: Without dead ends: 1613 [2021-11-23 01:56:19,079 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 01:56:19,087 INFO L933 BasicCegarLoop]: 379 mSDtfsCounter, 832 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 01:56:19,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [842 Valid, 985 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 01:56:19,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2021-11-23 01:56:19,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 1257. [2021-11-23 01:56:19,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1060 states have (on average 1.490566037735849) internal successors, (1580), 1054 states have internal predecessors, (1580), 140 states have call successors, (140), 50 states have call predecessors, (140), 56 states have return successors, (169), 153 states have call predecessors, (169), 140 states have call successors, (169) [2021-11-23 01:56:19,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 1889 transitions. [2021-11-23 01:56:19,211 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 1889 transitions. Word has length 65 [2021-11-23 01:56:19,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:56:19,212 INFO L470 AbstractCegarLoop]: Abstraction has 1257 states and 1889 transitions. [2021-11-23 01:56:19,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 01:56:19,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 1889 transitions. [2021-11-23 01:56:19,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 01:56:19,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:56:19,215 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:56:19,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 01:56:19,216 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:56:19,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:56:19,217 INFO L85 PathProgramCache]: Analyzing trace with hash -496239889, now seen corresponding path program 1 times [2021-11-23 01:56:19,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:56:19,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673519599] [2021-11-23 01:56:19,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:56:19,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:56:19,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:56:19,364 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 01:56:19,366 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:56:19,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673519599] [2021-11-23 01:56:19,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673519599] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:56:19,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:56:19,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 01:56:19,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582588452] [2021-11-23 01:56:19,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:56:19,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 01:56:19,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:56:19,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 01:56:19,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 01:56:19,371 INFO L87 Difference]: Start difference. First operand 1257 states and 1889 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 01:56:19,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:56:19,732 INFO L93 Difference]: Finished difference Result 3732 states and 5702 transitions. [2021-11-23 01:56:19,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 01:56:19,733 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 65 [2021-11-23 01:56:19,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:56:19,753 INFO L225 Difference]: With dead ends: 3732 [2021-11-23 01:56:19,754 INFO L226 Difference]: Without dead ends: 2480 [2021-11-23 01:56:19,760 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 01:56:19,761 INFO L933 BasicCegarLoop]: 353 mSDtfsCounter, 415 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:56:19,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 628 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:56:19,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2480 states. [2021-11-23 01:56:19,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2480 to 2468. [2021-11-23 01:56:19,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2468 states, 2087 states have (on average 1.4796358409199808) internal successors, (3088), 2075 states have internal predecessors, (3088), 268 states have call successors, (268), 100 states have call predecessors, (268), 112 states have return successors, (323), 293 states have call predecessors, (323), 268 states have call successors, (323) [2021-11-23 01:56:19,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2468 states to 2468 states and 3679 transitions. [2021-11-23 01:56:19,912 INFO L78 Accepts]: Start accepts. Automaton has 2468 states and 3679 transitions. Word has length 65 [2021-11-23 01:56:19,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:56:19,913 INFO L470 AbstractCegarLoop]: Abstraction has 2468 states and 3679 transitions. [2021-11-23 01:56:19,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 01:56:19,914 INFO L276 IsEmpty]: Start isEmpty. Operand 2468 states and 3679 transitions. [2021-11-23 01:56:19,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 01:56:19,915 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:56:19,915 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:56:19,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 01:56:19,916 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:56:19,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:56:19,916 INFO L85 PathProgramCache]: Analyzing trace with hash -96248690, now seen corresponding path program 1 times [2021-11-23 01:56:19,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:56:19,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221040755] [2021-11-23 01:56:19,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:56:19,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:56:19,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:56:19,983 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 01:56:19,983 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:56:19,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221040755] [2021-11-23 01:56:19,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221040755] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:56:19,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:56:19,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 01:56:19,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272532580] [2021-11-23 01:56:19,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:56:19,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 01:56:19,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:56:19,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 01:56:19,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:56:19,986 INFO L87 Difference]: Start difference. First operand 2468 states and 3679 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 01:56:20,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:56:20,697 INFO L93 Difference]: Finished difference Result 8394 states and 12722 transitions. [2021-11-23 01:56:20,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 01:56:20,698 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 65 [2021-11-23 01:56:20,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:56:20,746 INFO L225 Difference]: With dead ends: 8394 [2021-11-23 01:56:20,746 INFO L226 Difference]: Without dead ends: 5771 [2021-11-23 01:56:20,760 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 01:56:20,766 INFO L933 BasicCegarLoop]: 373 mSDtfsCounter, 832 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 01:56:20,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [842 Valid, 828 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 01:56:20,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5771 states. [2021-11-23 01:56:21,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5771 to 4745. [2021-11-23 01:56:21,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4745 states, 4012 states have (on average 1.4773180458624127) internal successors, (5927), 4008 states have internal predecessors, (5927), 508 states have call successors, (508), 196 states have call predecessors, (508), 224 states have return successors, (631), 541 states have call predecessors, (631), 508 states have call successors, (631) [2021-11-23 01:56:21,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4745 states to 4745 states and 7066 transitions. [2021-11-23 01:56:21,124 INFO L78 Accepts]: Start accepts. Automaton has 4745 states and 7066 transitions. Word has length 65 [2021-11-23 01:56:21,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:56:21,125 INFO L470 AbstractCegarLoop]: Abstraction has 4745 states and 7066 transitions. [2021-11-23 01:56:21,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 01:56:21,125 INFO L276 IsEmpty]: Start isEmpty. Operand 4745 states and 7066 transitions. [2021-11-23 01:56:21,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 01:56:21,127 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:56:21,127 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:56:21,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 01:56:21,127 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:56:21,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:56:21,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1724898963, now seen corresponding path program 1 times [2021-11-23 01:56:21,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:56:21,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215400861] [2021-11-23 01:56:21,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:56:21,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:56:21,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:56:21,213 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 01:56:21,214 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:56:21,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215400861] [2021-11-23 01:56:21,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215400861] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:56:21,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:56:21,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 01:56:21,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180800151] [2021-11-23 01:56:21,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:56:21,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 01:56:21,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:56:21,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 01:56:21,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 01:56:21,216 INFO L87 Difference]: Start difference. First operand 4745 states and 7066 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 01:56:22,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:56:22,109 INFO L93 Difference]: Finished difference Result 15917 states and 24185 transitions. [2021-11-23 01:56:22,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 01:56:22,110 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 65 [2021-11-23 01:56:22,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:56:22,189 INFO L225 Difference]: With dead ends: 15917 [2021-11-23 01:56:22,189 INFO L226 Difference]: Without dead ends: 10869 [2021-11-23 01:56:22,275 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 01:56:22,277 INFO L933 BasicCegarLoop]: 376 mSDtfsCounter, 834 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 01:56:22,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [845 Valid, 829 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 01:56:22,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10869 states. [2021-11-23 01:56:22,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10869 to 9251. [2021-11-23 01:56:22,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9251 states, 7798 states have (on average 1.4717876378558605) internal successors, (11477), 7810 states have internal predecessors, (11477), 1004 states have call successors, (1004), 388 states have call predecessors, (1004), 448 states have return successors, (1271), 1053 states have call predecessors, (1271), 1004 states have call successors, (1271) [2021-11-23 01:56:22,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9251 states to 9251 states and 13752 transitions. [2021-11-23 01:56:22,938 INFO L78 Accepts]: Start accepts. Automaton has 9251 states and 13752 transitions. Word has length 65 [2021-11-23 01:56:22,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:56:22,940 INFO L470 AbstractCegarLoop]: Abstraction has 9251 states and 13752 transitions. [2021-11-23 01:56:22,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 01:56:22,941 INFO L276 IsEmpty]: Start isEmpty. Operand 9251 states and 13752 transitions. [2021-11-23 01:56:22,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-23 01:56:22,950 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:56:22,950 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 01:56:22,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 01:56:22,951 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:56:22,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:56:22,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1030161032, now seen corresponding path program 1 times [2021-11-23 01:56:22,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:56:22,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606309953] [2021-11-23 01:56:22,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:56:22,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:56:22,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:56:23,064 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 01:56:23,064 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:56:23,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606309953] [2021-11-23 01:56:23,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606309953] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:56:23,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:56:23,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 01:56:23,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771643991] [2021-11-23 01:56:23,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:56:23,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 01:56:23,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:56:23,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 01:56:23,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:56:23,068 INFO L87 Difference]: Start difference. First operand 9251 states and 13752 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-23 01:56:24,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:56:24,214 INFO L93 Difference]: Finished difference Result 28763 states and 42889 transitions. [2021-11-23 01:56:24,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 01:56:24,215 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 84 [2021-11-23 01:56:24,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:56:24,341 INFO L225 Difference]: With dead ends: 28763 [2021-11-23 01:56:24,342 INFO L226 Difference]: Without dead ends: 19518 [2021-11-23 01:56:24,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-23 01:56:24,383 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 844 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 01:56:24,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 562 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 01:56:24,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19518 states. [2021-11-23 01:56:25,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19518 to 15560. [2021-11-23 01:56:25,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15560 states, 13267 states have (on average 1.4579784427526947) internal successors, (19343), 13290 states have internal predecessors, (19343), 1524 states have call successors, (1524), 648 states have call predecessors, (1524), 768 states have return successors, (2058), 1622 states have call predecessors, (2058), 1524 states have call successors, (2058) [2021-11-23 01:56:25,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15560 states to 15560 states and 22925 transitions. [2021-11-23 01:56:25,523 INFO L78 Accepts]: Start accepts. Automaton has 15560 states and 22925 transitions. Word has length 84 [2021-11-23 01:56:25,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:56:25,524 INFO L470 AbstractCegarLoop]: Abstraction has 15560 states and 22925 transitions. [2021-11-23 01:56:25,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-23 01:56:25,525 INFO L276 IsEmpty]: Start isEmpty. Operand 15560 states and 22925 transitions. [2021-11-23 01:56:25,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-23 01:56:25,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:56:25,534 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 01:56:25,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 01:56:25,535 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:56:25,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:56:25,535 INFO L85 PathProgramCache]: Analyzing trace with hash 811186100, now seen corresponding path program 1 times [2021-11-23 01:56:25,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:56:25,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107048257] [2021-11-23 01:56:25,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:56:25,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:56:25,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:56:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 01:56:25,759 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:56:25,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107048257] [2021-11-23 01:56:25,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107048257] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:56:25,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:56:25,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 01:56:25,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843273476] [2021-11-23 01:56:25,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:56:25,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 01:56:25,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:56:25,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 01:56:25,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:56:25,770 INFO L87 Difference]: Start difference. First operand 15560 states and 22925 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-23 01:56:27,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:56:27,928 INFO L93 Difference]: Finished difference Result 57632 states and 85106 transitions. [2021-11-23 01:56:27,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 01:56:27,931 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 86 [2021-11-23 01:56:27,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:56:28,135 INFO L225 Difference]: With dead ends: 57632 [2021-11-23 01:56:28,135 INFO L226 Difference]: Without dead ends: 42078 [2021-11-23 01:56:28,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-23 01:56:28,193 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 873 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 01:56:28,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [890 Valid, 533 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 01:56:28,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42078 states. [2021-11-23 01:56:30,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42078 to 30516. [2021-11-23 01:56:30,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30516 states, 26031 states have (on average 1.451615381660328) internal successors, (37787), 26080 states have internal predecessors, (37787), 2948 states have call successors, (2948), 1296 states have call predecessors, (2948), 1536 states have return successors, (3956), 3140 states have call predecessors, (3956), 2948 states have call successors, (3956) [2021-11-23 01:56:30,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30516 states to 30516 states and 44691 transitions. [2021-11-23 01:56:30,535 INFO L78 Accepts]: Start accepts. Automaton has 30516 states and 44691 transitions. Word has length 86 [2021-11-23 01:56:30,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:56:30,535 INFO L470 AbstractCegarLoop]: Abstraction has 30516 states and 44691 transitions. [2021-11-23 01:56:30,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-23 01:56:30,536 INFO L276 IsEmpty]: Start isEmpty. Operand 30516 states and 44691 transitions. [2021-11-23 01:56:30,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-23 01:56:30,552 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:56:30,553 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 01:56:30,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 01:56:30,553 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:56:30,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:56:30,554 INFO L85 PathProgramCache]: Analyzing trace with hash -623132136, now seen corresponding path program 1 times [2021-11-23 01:56:30,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:56:30,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900444298] [2021-11-23 01:56:30,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:56:30,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:56:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:56:30,670 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 01:56:30,670 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:56:30,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900444298] [2021-11-23 01:56:30,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900444298] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:56:30,671 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:56:30,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 01:56:30,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034306366] [2021-11-23 01:56:30,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:56:30,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 01:56:30,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:56:30,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 01:56:30,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:56:30,674 INFO L87 Difference]: Start difference. First operand 30516 states and 44691 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-23 01:56:33,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:56:33,397 INFO L93 Difference]: Finished difference Result 87320 states and 128405 transitions. [2021-11-23 01:56:33,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 01:56:33,398 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 88 [2021-11-23 01:56:33,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:56:33,861 INFO L225 Difference]: With dead ends: 87320 [2021-11-23 01:56:33,861 INFO L226 Difference]: Without dead ends: 56810 [2021-11-23 01:56:33,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-23 01:56:33,923 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 715 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 01:56:33,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [721 Valid, 720 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 01:56:33,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56810 states. [2021-11-23 01:56:36,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56810 to 45176. [2021-11-23 01:56:36,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45176 states, 38483 states have (on average 1.4461190655614167) internal successors, (55651), 38524 states have internal predecessors, (55651), 4388 states have call successors, (4388), 1952 states have call predecessors, (4388), 2304 states have return successors, (5836), 4700 states have call predecessors, (5836), 4388 states have call successors, (5836) [2021-11-23 01:56:36,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45176 states to 45176 states and 65875 transitions. [2021-11-23 01:56:36,790 INFO L78 Accepts]: Start accepts. Automaton has 45176 states and 65875 transitions. Word has length 88 [2021-11-23 01:56:36,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:56:36,790 INFO L470 AbstractCegarLoop]: Abstraction has 45176 states and 65875 transitions. [2021-11-23 01:56:36,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-23 01:56:36,791 INFO L276 IsEmpty]: Start isEmpty. Operand 45176 states and 65875 transitions. [2021-11-23 01:56:36,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-23 01:56:36,813 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:56:36,813 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:56:36,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 01:56:36,814 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:56:36,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:56:36,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1657797372, now seen corresponding path program 1 times [2021-11-23 01:56:36,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:56:36,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831604690] [2021-11-23 01:56:36,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:56:36,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:56:37,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:56:37,178 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 01:56:37,178 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:56:37,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831604690] [2021-11-23 01:56:37,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831604690] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:56:37,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:56:37,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 01:56:37,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685756347] [2021-11-23 01:56:37,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:56:37,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 01:56:37,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:56:37,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 01:56:37,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:56:37,181 INFO L87 Difference]: Start difference. First operand 45176 states and 65875 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-23 01:56:40,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:56:40,891 INFO L93 Difference]: Finished difference Result 127092 states and 186261 transitions. [2021-11-23 01:56:40,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 01:56:40,892 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 90 [2021-11-23 01:56:40,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:56:41,211 INFO L225 Difference]: With dead ends: 127092 [2021-11-23 01:56:41,211 INFO L226 Difference]: Without dead ends: 81922 [2021-11-23 01:56:41,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-23 01:56:41,318 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 698 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 01:56:41,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [704 Valid, 705 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 01:56:41,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81922 states. [2021-11-23 01:56:44,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81922 to 66992. [2021-11-23 01:56:44,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66992 states, 56995 states have (on average 1.4404596894464428) internal successors, (82099), 56996 states have internal predecessors, (82099), 6540 states have call successors, (6540), 2944 states have call predecessors, (6540), 3456 states have return successors, (8604), 7052 states have call predecessors, (8604), 6540 states have call successors, (8604) [2021-11-23 01:56:45,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66992 states to 66992 states and 97243 transitions. [2021-11-23 01:56:45,092 INFO L78 Accepts]: Start accepts. Automaton has 66992 states and 97243 transitions. Word has length 90 [2021-11-23 01:56:45,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:56:45,093 INFO L470 AbstractCegarLoop]: Abstraction has 66992 states and 97243 transitions. [2021-11-23 01:56:45,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-23 01:56:45,094 INFO L276 IsEmpty]: Start isEmpty. Operand 66992 states and 97243 transitions. [2021-11-23 01:56:45,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-23 01:56:45,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:56:45,129 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:56:45,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 01:56:45,130 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:56:45,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:56:45,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1782043176, now seen corresponding path program 1 times [2021-11-23 01:56:45,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:56:45,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843366800] [2021-11-23 01:56:45,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:56:45,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:56:45,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:56:45,229 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 01:56:45,229 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:56:45,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843366800] [2021-11-23 01:56:45,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843366800] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:56:45,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:56:45,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 01:56:45,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390755069] [2021-11-23 01:56:45,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:56:45,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 01:56:45,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:56:45,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 01:56:45,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:56:45,233 INFO L87 Difference]: Start difference. First operand 66992 states and 97243 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-23 01:56:52,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:56:52,570 INFO L93 Difference]: Finished difference Result 232164 states and 338678 transitions. [2021-11-23 01:56:52,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 01:56:52,571 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 92 [2021-11-23 01:56:52,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:56:53,498 INFO L225 Difference]: With dead ends: 232164 [2021-11-23 01:56:53,498 INFO L226 Difference]: Without dead ends: 165178 [2021-11-23 01:56:53,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-23 01:56:53,622 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 764 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 781 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 01:56:53,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [781 Valid, 518 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 01:56:53,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165178 states. [2021-11-23 01:57:00,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165178 to 131224. [2021-11-23 01:57:00,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131224 states, 111667 states have (on average 1.4332882588410183) internal successors, (160051), 111700 states have internal predecessors, (160051), 12644 states have call successors, (12644), 5888 states have call predecessors, (12644), 6912 states have return successors, (16516), 13636 states have call predecessors, (16516), 12644 states have call successors, (16516) [2021-11-23 01:57:00,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131224 states to 131224 states and 189211 transitions. [2021-11-23 01:57:00,896 INFO L78 Accepts]: Start accepts. Automaton has 131224 states and 189211 transitions. Word has length 92 [2021-11-23 01:57:00,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:57:00,897 INFO L470 AbstractCegarLoop]: Abstraction has 131224 states and 189211 transitions. [2021-11-23 01:57:00,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-23 01:57:00,897 INFO L276 IsEmpty]: Start isEmpty. Operand 131224 states and 189211 transitions. [2021-11-23 01:57:00,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-23 01:57:00,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:57:00,944 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:57:00,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 01:57:00,944 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:57:00,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:57:00,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1680950204, now seen corresponding path program 1 times [2021-11-23 01:57:00,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:57:00,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260775596] [2021-11-23 01:57:00,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:57:00,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:57:00,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:57:01,021 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 01:57:01,022 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:57:01,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260775596] [2021-11-23 01:57:01,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260775596] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:57:01,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:57:01,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 01:57:01,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513211704] [2021-11-23 01:57:01,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:57:01,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 01:57:01,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:57:01,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 01:57:01,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:57:01,024 INFO L87 Difference]: Start difference. First operand 131224 states and 189211 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6)