./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.03.cil-2.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_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/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_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.03.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/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_36ed8938-c592-4426-a10e-4b2f30b92568/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 53b2835bffc5e46db9e843d7a27e5dc2af58bf47930b3bc6dacf70c618d5bd01 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:44:22,656 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:44:22,657 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:44:22,713 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:44:22,714 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:44:22,720 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:44:22,723 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:44:22,727 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:44:22,730 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:44:22,739 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:44:22,740 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:44:22,742 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:44:22,743 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:44:22,746 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:44:22,749 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:44:22,755 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:44:22,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:44:22,759 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:44:22,762 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:44:22,773 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:44:22,775 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:44:22,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:44:22,780 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:44:22,781 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:44:22,786 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:44:22,786 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:44:22,787 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:44:22,789 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:44:22,790 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:44:22,791 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:44:22,792 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:44:22,793 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:44:22,796 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:44:22,797 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:44:22,799 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:44:22,800 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:44:22,801 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:44:22,801 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:44:22,801 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:44:22,802 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:44:22,803 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:44:22,804 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:44:22,857 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:44:22,858 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:44:22,859 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:44:22,859 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:44:22,867 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:44:22,867 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:44:22,868 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:44:22,868 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:44:22,868 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:44:22,868 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:44:22,870 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:44:22,870 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:44:22,870 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:44:22,871 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:44:22,871 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:44:22,871 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:44:22,871 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:44:22,872 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:44:22,873 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:44:22,873 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:44:22,873 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:44:22,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:44:22,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:44:22,874 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:44:22,874 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:44:22,875 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:44:22,876 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:44:22,877 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:44:22,877 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:44:22,877 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:44:22,878 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:44:22,878 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:44:22,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:44:22,879 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:44:22,879 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:44:22,879 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:44:22,880 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:44:22,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:44:22,880 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:44:22,881 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:44:22,881 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:44:22,881 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_36ed8938-c592-4426-a10e-4b2f30b92568/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 53b2835bffc5e46db9e843d7a27e5dc2af58bf47930b3bc6dacf70c618d5bd01 [2021-11-23 02:44:23,284 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:44:23,322 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:44:23,325 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:44:23,327 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:44:23,328 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:44:23,329 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.03.cil-2.c [2021-11-23 02:44:23,417 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/data/8b57caa1d/851893c6da604276ba5890b97f0e3ae4/FLAG28e17c7cb [2021-11-23 02:44:24,080 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:44:24,081 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.03.cil-2.c [2021-11-23 02:44:24,106 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/data/8b57caa1d/851893c6da604276ba5890b97f0e3ae4/FLAG28e17c7cb [2021-11-23 02:44:24,372 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/data/8b57caa1d/851893c6da604276ba5890b97f0e3ae4 [2021-11-23 02:44:24,374 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:44:24,375 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:44:24,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:44:24,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:44:24,395 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:44:24,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:44:24" (1/1) ... [2021-11-23 02:44:24,398 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32f561e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:24, skipping insertion in model container [2021-11-23 02:44:24,398 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:44:24" (1/1) ... [2021-11-23 02:44:24,406 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:44:24,453 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:44:24,694 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_36ed8938-c592-4426-a10e-4b2f30b92568/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.03.cil-2.c[911,924] [2021-11-23 02:44:24,819 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_36ed8938-c592-4426-a10e-4b2f30b92568/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.03.cil-2.c[8416,8429] [2021-11-23 02:44:24,921 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:44:24,942 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:44:24,959 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_36ed8938-c592-4426-a10e-4b2f30b92568/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.03.cil-2.c[911,924] [2021-11-23 02:44:25,011 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_36ed8938-c592-4426-a10e-4b2f30b92568/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.03.cil-2.c[8416,8429] [2021-11-23 02:44:25,056 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:44:25,095 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:44:25,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:25 WrapperNode [2021-11-23 02:44:25,096 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:44:25,097 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:44:25,098 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:44:25,098 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:44:25,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:25" (1/1) ... [2021-11-23 02:44:25,121 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:25" (1/1) ... [2021-11-23 02:44:25,169 INFO L137 Inliner]: procedures = 61, calls = 70, calls flagged for inlining = 30, calls inlined = 30, statements flattened = 556 [2021-11-23 02:44:25,169 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:44:25,170 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:44:25,170 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:44:25,170 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:44:25,180 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:25" (1/1) ... [2021-11-23 02:44:25,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:25" (1/1) ... [2021-11-23 02:44:25,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:25" (1/1) ... [2021-11-23 02:44:25,185 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:25" (1/1) ... [2021-11-23 02:44:25,204 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:25" (1/1) ... [2021-11-23 02:44:25,232 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:25" (1/1) ... [2021-11-23 02:44:25,235 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:25" (1/1) ... [2021-11-23 02:44:25,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:44:25,241 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:44:25,241 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:44:25,241 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:44:25,270 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:25" (1/1) ... [2021-11-23 02:44:25,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:44:25,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:44:25,316 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:44:25,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:44:25,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:44:25,375 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-23 02:44:25,375 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-23 02:44:25,376 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-11-23 02:44:25,376 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-11-23 02:44:25,376 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-11-23 02:44:25,376 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-11-23 02:44:25,376 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-11-23 02:44:25,377 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-11-23 02:44:25,377 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-11-23 02:44:25,377 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-11-23 02:44:25,377 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-11-23 02:44:25,377 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-11-23 02:44:25,378 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-11-23 02:44:25,378 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-11-23 02:44:25,379 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-11-23 02:44:25,379 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-11-23 02:44:25,379 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-11-23 02:44:25,379 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-11-23 02:44:25,379 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-11-23 02:44:25,380 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-11-23 02:44:25,380 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-11-23 02:44:25,380 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-11-23 02:44:25,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:44:25,381 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-11-23 02:44:25,381 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-11-23 02:44:25,381 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-11-23 02:44:25,381 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-11-23 02:44:25,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:44:25,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:44:25,382 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-11-23 02:44:25,382 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-11-23 02:44:25,534 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:44:25,536 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:44:26,124 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2021-11-23 02:44:26,132 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2021-11-23 02:44:26,200 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:44:26,493 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:44:26,493 INFO L301 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-23 02:44:26,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:44:26 BoogieIcfgContainer [2021-11-23 02:44:26,497 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:44:26,499 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:44:26,500 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:44:26,505 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:44:26,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:44:24" (1/3) ... [2021-11-23 02:44:26,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2822e893 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:44:26, skipping insertion in model container [2021-11-23 02:44:26,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:25" (2/3) ... [2021-11-23 02:44:26,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2822e893 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:44:26, skipping insertion in model container [2021-11-23 02:44:26,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:44:26" (3/3) ... [2021-11-23 02:44:26,511 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.03.cil-2.c [2021-11-23 02:44:26,517 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:44:26,517 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 02:44:26,610 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:44:26,623 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:44:26,624 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 02:44:26,660 INFO L276 IsEmpty]: Start isEmpty. Operand has 168 states, 118 states have (on average 1.5) internal successors, (177), 124 states have internal predecessors, (177), 33 states have call successors, (33), 14 states have call predecessors, (33), 14 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-11-23 02:44:26,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-23 02:44:26,676 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:26,677 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] [2021-11-23 02:44:26,678 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:26,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:26,687 INFO L85 PathProgramCache]: Analyzing trace with hash 995548634, now seen corresponding path program 1 times [2021-11-23 02:44:26,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:26,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711573073] [2021-11-23 02:44:26,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:26,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:26,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:27,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:44:27,010 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:27,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711573073] [2021-11-23 02:44:27,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711573073] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:27,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:44:27,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:44:27,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966532848] [2021-11-23 02:44:27,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:27,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:44:27,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:27,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:44:27,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:44:27,069 INFO L87 Difference]: Start difference. First operand has 168 states, 118 states have (on average 1.5) internal successors, (177), 124 states have internal predecessors, (177), 33 states have call successors, (33), 14 states have call predecessors, (33), 14 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:44:28,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:28,081 INFO L93 Difference]: Finished difference Result 637 states and 962 transitions. [2021-11-23 02:44:28,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:44:28,084 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 40 [2021-11-23 02:44:28,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:28,116 INFO L225 Difference]: With dead ends: 637 [2021-11-23 02:44:28,117 INFO L226 Difference]: Without dead ends: 464 [2021-11-23 02:44:28,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:44:28,132 INFO L933 BasicCegarLoop]: 311 mSDtfsCounter, 651 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:28,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [659 Valid, 664 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 02:44:28,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-11-23 02:44:28,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 453. [2021-11-23 02:44:28,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 332 states have (on average 1.4186746987951808) internal successors, (471), 339 states have internal predecessors, (471), 82 states have call successors, (82), 38 states have call predecessors, (82), 37 states have return successors, (106), 77 states have call predecessors, (106), 80 states have call successors, (106) [2021-11-23 02:44:28,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 659 transitions. [2021-11-23 02:44:28,287 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 659 transitions. Word has length 40 [2021-11-23 02:44:28,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:28,288 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 659 transitions. [2021-11-23 02:44:28,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:44:28,289 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 659 transitions. [2021-11-23 02:44:28,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-23 02:44:28,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:28,294 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] [2021-11-23 02:44:28,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:44:28,295 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:28,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:28,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1586164402, now seen corresponding path program 1 times [2021-11-23 02:44:28,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:28,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821344110] [2021-11-23 02:44:28,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:28,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:28,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:28,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:44:28,406 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:28,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821344110] [2021-11-23 02:44:28,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821344110] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:28,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:44:28,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:44:28,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076208415] [2021-11-23 02:44:28,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:28,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:44:28,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:28,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:44:28,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:44:28,411 INFO L87 Difference]: Start difference. First operand 453 states and 659 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-23 02:44:28,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:28,746 INFO L93 Difference]: Finished difference Result 653 states and 936 transitions. [2021-11-23 02:44:28,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:44:28,748 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44 [2021-11-23 02:44:28,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:28,760 INFO L225 Difference]: With dead ends: 653 [2021-11-23 02:44:28,760 INFO L226 Difference]: Without dead ends: 582 [2021-11-23 02:44:28,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:44:28,767 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 287 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:28,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 447 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:44:28,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-11-23 02:44:28,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 571. [2021-11-23 02:44:28,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 416 states have (on average 1.4014423076923077) internal successors, (583), 423 states have internal predecessors, (583), 102 states have call successors, (102), 52 states have call predecessors, (102), 51 states have return successors, (129), 97 states have call predecessors, (129), 100 states have call successors, (129) [2021-11-23 02:44:28,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 814 transitions. [2021-11-23 02:44:28,864 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 814 transitions. Word has length 44 [2021-11-23 02:44:28,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:28,865 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 814 transitions. [2021-11-23 02:44:28,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-23 02:44:28,866 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 814 transitions. [2021-11-23 02:44:28,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-23 02:44:28,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:28,876 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:44:28,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:44:28,876 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:28,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:28,877 INFO L85 PathProgramCache]: Analyzing trace with hash 106760539, now seen corresponding path program 1 times [2021-11-23 02:44:28,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:28,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494531924] [2021-11-23 02:44:28,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:28,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:29,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:44:29,017 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:29,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494531924] [2021-11-23 02:44:29,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494531924] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:29,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:44:29,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:44:29,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769319175] [2021-11-23 02:44:29,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:29,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:44:29,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:29,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:44:29,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:44:29,023 INFO L87 Difference]: Start difference. First operand 571 states and 814 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-23 02:44:29,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:29,842 INFO L93 Difference]: Finished difference Result 1108 states and 1537 transitions. [2021-11-23 02:44:29,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:44:29,843 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2021-11-23 02:44:29,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:29,850 INFO L225 Difference]: With dead ends: 1108 [2021-11-23 02:44:29,851 INFO L226 Difference]: Without dead ends: 642 [2021-11-23 02:44:29,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:44:29,862 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 686 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:29,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [694 Valid, 837 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 02:44:29,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-11-23 02:44:29,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 557. [2021-11-23 02:44:29,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 402 states have (on average 1.3681592039800996) internal successors, (550), 409 states have internal predecessors, (550), 102 states have call successors, (102), 52 states have call predecessors, (102), 51 states have return successors, (126), 97 states have call predecessors, (126), 100 states have call successors, (126) [2021-11-23 02:44:29,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 778 transitions. [2021-11-23 02:44:29,921 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 778 transitions. Word has length 45 [2021-11-23 02:44:29,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:29,922 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 778 transitions. [2021-11-23 02:44:29,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-23 02:44:29,922 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 778 transitions. [2021-11-23 02:44:29,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-23 02:44:29,924 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:29,924 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:44:29,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:44:29,925 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:29,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:29,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1623348331, now seen corresponding path program 1 times [2021-11-23 02:44:29,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:29,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107947141] [2021-11-23 02:44:29,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:29,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:29,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:44:29,989 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:29,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107947141] [2021-11-23 02:44:29,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107947141] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:29,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:44:29,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:44:29,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958081857] [2021-11-23 02:44:29,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:29,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:44:29,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:29,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:44:29,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:44:29,992 INFO L87 Difference]: Start difference. First operand 557 states and 778 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-23 02:44:30,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:30,644 INFO L93 Difference]: Finished difference Result 1023 states and 1386 transitions. [2021-11-23 02:44:30,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:44:30,645 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 46 [2021-11-23 02:44:30,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:30,652 INFO L225 Difference]: With dead ends: 1023 [2021-11-23 02:44:30,653 INFO L226 Difference]: Without dead ends: 846 [2021-11-23 02:44:30,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:44:30,656 INFO L933 BasicCegarLoop]: 316 mSDtfsCounter, 600 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:30,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [609 Valid, 776 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:44:30,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2021-11-23 02:44:30,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 821. [2021-11-23 02:44:30,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 583 states have (on average 1.3190394511149228) internal successors, (769), 590 states have internal predecessors, (769), 151 states have call successors, (151), 86 states have call predecessors, (151), 85 states have return successors, (192), 146 states have call predecessors, (192), 149 states have call successors, (192) [2021-11-23 02:44:30,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1112 transitions. [2021-11-23 02:44:30,735 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1112 transitions. Word has length 46 [2021-11-23 02:44:30,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:30,736 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 1112 transitions. [2021-11-23 02:44:30,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-23 02:44:30,737 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1112 transitions. [2021-11-23 02:44:30,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-23 02:44:30,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:30,738 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] [2021-11-23 02:44:30,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:44:30,739 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:30,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:30,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1396989782, now seen corresponding path program 1 times [2021-11-23 02:44:30,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:30,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976014900] [2021-11-23 02:44:30,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:30,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:30,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:44:30,792 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:30,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976014900] [2021-11-23 02:44:30,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976014900] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:30,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:44:30,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:44:30,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912684124] [2021-11-23 02:44:30,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:30,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:44:30,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:30,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:44:30,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:44:30,795 INFO L87 Difference]: Start difference. First operand 821 states and 1112 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:44:30,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:30,889 INFO L93 Difference]: Finished difference Result 822 states and 1113 transitions. [2021-11-23 02:44:30,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:44:30,890 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 50 [2021-11-23 02:44:30,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:30,894 INFO L225 Difference]: With dead ends: 822 [2021-11-23 02:44:30,894 INFO L226 Difference]: Without dead ends: 378 [2021-11-23 02:44:30,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:44:30,897 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 192 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:30,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 173 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:44:30,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-11-23 02:44:30,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2021-11-23 02:44:30,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 281 states have (on average 1.4128113879003559) internal successors, (397), 285 states have internal predecessors, (397), 66 states have call successors, (66), 30 states have call predecessors, (66), 30 states have return successors, (92), 63 states have call predecessors, (92), 66 states have call successors, (92) [2021-11-23 02:44:30,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 555 transitions. [2021-11-23 02:44:30,951 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 555 transitions. Word has length 50 [2021-11-23 02:44:30,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:30,951 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 555 transitions. [2021-11-23 02:44:30,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:44:30,952 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 555 transitions. [2021-11-23 02:44:30,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 02:44:30,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:30,954 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] [2021-11-23 02:44:30,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:44:30,955 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:30,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:30,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1845259145, now seen corresponding path program 1 times [2021-11-23 02:44:30,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:30,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584790579] [2021-11-23 02:44:30,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:30,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:30,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:31,026 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 02:44:31,027 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:31,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584790579] [2021-11-23 02:44:31,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584790579] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:44:31,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462763991] [2021-11-23 02:44:31,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:31,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:44:31,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:44:31,030 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:44:31,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:44:31,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:31,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:44:31,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:44:31,447 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:44:31,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:44:31,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462763991] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:31,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:44:31,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-23 02:44:31,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637089158] [2021-11-23 02:44:31,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:31,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:44:31,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:31,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:44:31,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:44:31,450 INFO L87 Difference]: Start difference. First operand 378 states and 555 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:44:31,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:31,575 INFO L93 Difference]: Finished difference Result 1106 states and 1666 transitions. [2021-11-23 02:44:31,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:44:31,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2021-11-23 02:44:31,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:31,582 INFO L225 Difference]: With dead ends: 1106 [2021-11-23 02:44:31,583 INFO L226 Difference]: Without dead ends: 734 [2021-11-23 02:44:31,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:44:31,586 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 97 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:31,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 203 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:44:31,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-11-23 02:44:31,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 727. [2021-11-23 02:44:31,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 543 states have (on average 1.3996316758747698) internal successors, (760), 550 states have internal predecessors, (760), 123 states have call successors, (123), 60 states have call predecessors, (123), 60 states have return successors, (171), 117 states have call predecessors, (171), 123 states have call successors, (171) [2021-11-23 02:44:31,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 1054 transitions. [2021-11-23 02:44:31,650 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 1054 transitions. Word has length 73 [2021-11-23 02:44:31,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:31,650 INFO L470 AbstractCegarLoop]: Abstraction has 727 states and 1054 transitions. [2021-11-23 02:44:31,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:44:31,651 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 1054 transitions. [2021-11-23 02:44:31,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 02:44:31,653 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:31,653 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] [2021-11-23 02:44:31,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:44:31,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 02:44:31,867 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:31,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:31,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1339056711, now seen corresponding path program 1 times [2021-11-23 02:44:31,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:31,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300835646] [2021-11-23 02:44:31,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:31,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:31,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:32,041 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 02:44:32,041 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:32,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300835646] [2021-11-23 02:44:32,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300835646] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:32,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:44:32,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:44:32,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651884943] [2021-11-23 02:44:32,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:32,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:44:32,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:32,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:44:32,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:44:32,045 INFO L87 Difference]: Start difference. First operand 727 states and 1054 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-23 02:44:32,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:32,418 INFO L93 Difference]: Finished difference Result 1941 states and 2865 transitions. [2021-11-23 02:44:32,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:44:32,419 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 73 [2021-11-23 02:44:32,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:32,431 INFO L225 Difference]: With dead ends: 1941 [2021-11-23 02:44:32,431 INFO L226 Difference]: Without dead ends: 1221 [2021-11-23 02:44:32,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:44:32,435 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 290 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:32,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 392 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:44:32,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-11-23 02:44:32,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1135. [2021-11-23 02:44:32,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 846 states have (on average 1.3829787234042554) internal successors, (1170), 857 states have internal predecessors, (1170), 192 states have call successors, (192), 96 states have call predecessors, (192), 96 states have return successors, (273), 182 states have call predecessors, (273), 192 states have call successors, (273) [2021-11-23 02:44:32,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 1635 transitions. [2021-11-23 02:44:32,585 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 1635 transitions. Word has length 73 [2021-11-23 02:44:32,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:32,589 INFO L470 AbstractCegarLoop]: Abstraction has 1135 states and 1635 transitions. [2021-11-23 02:44:32,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-23 02:44:32,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 1635 transitions. [2021-11-23 02:44:32,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-23 02:44:32,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:32,595 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] [2021-11-23 02:44:32,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:44:32,596 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:32,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:32,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1357488447, now seen corresponding path program 1 times [2021-11-23 02:44:32,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:32,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670411065] [2021-11-23 02:44:32,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:32,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:32,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:32,707 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 02:44:32,707 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:32,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670411065] [2021-11-23 02:44:32,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670411065] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:32,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:44:32,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:44:32,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088125208] [2021-11-23 02:44:32,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:32,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:44:32,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:32,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:44:32,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:44:32,712 INFO L87 Difference]: Start difference. First operand 1135 states and 1635 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:44:32,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:32,898 INFO L93 Difference]: Finished difference Result 2365 states and 3464 transitions. [2021-11-23 02:44:32,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:44:32,899 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 74 [2021-11-23 02:44:32,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:32,914 INFO L225 Difference]: With dead ends: 2365 [2021-11-23 02:44:32,915 INFO L226 Difference]: Without dead ends: 1379 [2021-11-23 02:44:32,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:44:32,922 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 46 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:32,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 255 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:44:32,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2021-11-23 02:44:33,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 1254. [2021-11-23 02:44:33,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 953 states have (on average 1.4081846799580273) internal successors, (1342), 964 states have internal predecessors, (1342), 198 states have call successors, (198), 102 states have call predecessors, (198), 102 states have return successors, (279), 188 states have call predecessors, (279), 198 states have call successors, (279) [2021-11-23 02:44:33,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1819 transitions. [2021-11-23 02:44:33,053 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1819 transitions. Word has length 74 [2021-11-23 02:44:33,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:33,054 INFO L470 AbstractCegarLoop]: Abstraction has 1254 states and 1819 transitions. [2021-11-23 02:44:33,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:44:33,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1819 transitions. [2021-11-23 02:44:33,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 02:44:33,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:33,084 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:44:33,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:44:33,085 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:33,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:33,085 INFO L85 PathProgramCache]: Analyzing trace with hash 2108502666, now seen corresponding path program 1 times [2021-11-23 02:44:33,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:33,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257301888] [2021-11-23 02:44:33,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:33,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:33,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:33,225 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-23 02:44:33,226 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:33,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257301888] [2021-11-23 02:44:33,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257301888] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:33,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:44:33,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:44:33,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795300618] [2021-11-23 02:44:33,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:33,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:44:33,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:33,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:44:33,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:44:33,229 INFO L87 Difference]: Start difference. First operand 1254 states and 1819 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 02:44:33,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:33,503 INFO L93 Difference]: Finished difference Result 3679 states and 5443 transitions. [2021-11-23 02:44:33,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:44:33,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 97 [2021-11-23 02:44:33,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:33,529 INFO L225 Difference]: With dead ends: 3679 [2021-11-23 02:44:33,529 INFO L226 Difference]: Without dead ends: 2431 [2021-11-23 02:44:33,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:44:33,540 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 92 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:33,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 205 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:44:33,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2431 states. [2021-11-23 02:44:33,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2431 to 2407. [2021-11-23 02:44:33,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2407 states, 1826 states have (on average 1.3844468784227821) internal successors, (2528), 1847 states have internal predecessors, (2528), 376 states have call successors, (376), 204 states have call predecessors, (376), 204 states have return successors, (524), 356 states have call predecessors, (524), 376 states have call successors, (524) [2021-11-23 02:44:33,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2407 states to 2407 states and 3428 transitions. [2021-11-23 02:44:33,831 INFO L78 Accepts]: Start accepts. Automaton has 2407 states and 3428 transitions. Word has length 97 [2021-11-23 02:44:33,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:33,831 INFO L470 AbstractCegarLoop]: Abstraction has 2407 states and 3428 transitions. [2021-11-23 02:44:33,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 02:44:33,832 INFO L276 IsEmpty]: Start isEmpty. Operand 2407 states and 3428 transitions. [2021-11-23 02:44:33,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-23 02:44:33,843 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:33,844 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:44:33,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:44:33,844 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:33,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:33,845 INFO L85 PathProgramCache]: Analyzing trace with hash -503239927, now seen corresponding path program 1 times [2021-11-23 02:44:33,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:33,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592042730] [2021-11-23 02:44:33,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:33,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:33,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:33,942 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-23 02:44:33,942 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:33,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592042730] [2021-11-23 02:44:33,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592042730] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:44:33,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103781114] [2021-11-23 02:44:33,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:33,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:44:33,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:44:33,947 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:44:33,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:44:34,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:34,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:44:34,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:44:34,307 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-23 02:44:34,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:44:34,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103781114] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:34,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:44:34,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-23 02:44:34,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083230664] [2021-11-23 02:44:34,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:34,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:44:34,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:34,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:44:34,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:44:34,311 INFO L87 Difference]: Start difference. First operand 2407 states and 3428 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:44:34,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:34,590 INFO L93 Difference]: Finished difference Result 4769 states and 6829 transitions. [2021-11-23 02:44:34,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:44:34,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 109 [2021-11-23 02:44:34,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:34,624 INFO L225 Difference]: With dead ends: 4769 [2021-11-23 02:44:34,624 INFO L226 Difference]: Without dead ends: 2995 [2021-11-23 02:44:34,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:44:34,635 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 93 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:34,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 138 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:44:34,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2995 states. [2021-11-23 02:44:34,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2995 to 2907. [2021-11-23 02:44:34,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2907 states, 2257 states have (on average 1.35533894550288) internal successors, (3059), 2274 states have internal predecessors, (3059), 394 states have call successors, (394), 254 states have call predecessors, (394), 255 states have return successors, (549), 379 states have call predecessors, (549), 394 states have call successors, (549) [2021-11-23 02:44:34,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2907 states to 2907 states and 4002 transitions. [2021-11-23 02:44:34,936 INFO L78 Accepts]: Start accepts. Automaton has 2907 states and 4002 transitions. Word has length 109 [2021-11-23 02:44:34,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:34,937 INFO L470 AbstractCegarLoop]: Abstraction has 2907 states and 4002 transitions. [2021-11-23 02:44:34,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:44:34,938 INFO L276 IsEmpty]: Start isEmpty. Operand 2907 states and 4002 transitions. [2021-11-23 02:44:34,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-23 02:44:34,952 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:34,952 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:44:34,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:44:35,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:44:35,179 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:35,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:35,179 INFO L85 PathProgramCache]: Analyzing trace with hash -811678936, now seen corresponding path program 1 times [2021-11-23 02:44:35,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:35,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043215178] [2021-11-23 02:44:35,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:35,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:35,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:35,273 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-23 02:44:35,274 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:35,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043215178] [2021-11-23 02:44:35,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043215178] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:44:35,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325883349] [2021-11-23 02:44:35,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:35,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:44:35,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:44:35,276 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:44:35,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:44:35,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:35,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:44:35,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:44:35,628 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:44:35,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:44:35,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325883349] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:35,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:44:35,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-23 02:44:35,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109179005] [2021-11-23 02:44:35,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:35,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:44:35,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:35,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:44:35,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:44:35,632 INFO L87 Difference]: Start difference. First operand 2907 states and 4002 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:44:35,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:35,936 INFO L93 Difference]: Finished difference Result 5533 states and 7691 transitions. [2021-11-23 02:44:35,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:44:35,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 109 [2021-11-23 02:44:35,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:35,966 INFO L225 Difference]: With dead ends: 5533 [2021-11-23 02:44:35,966 INFO L226 Difference]: Without dead ends: 3401 [2021-11-23 02:44:35,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:44:35,976 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 54 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:35,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 258 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:44:35,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3401 states. [2021-11-23 02:44:36,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3401 to 3113. [2021-11-23 02:44:36,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3113 states, 2439 states have (on average 1.3722837228372284) internal successors, (3347), 2456 states have internal predecessors, (3347), 406 states have call successors, (406), 266 states have call predecessors, (406), 267 states have return successors, (561), 391 states have call predecessors, (561), 406 states have call successors, (561) [2021-11-23 02:44:36,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3113 states to 3113 states and 4314 transitions. [2021-11-23 02:44:36,272 INFO L78 Accepts]: Start accepts. Automaton has 3113 states and 4314 transitions. Word has length 109 [2021-11-23 02:44:36,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:36,272 INFO L470 AbstractCegarLoop]: Abstraction has 3113 states and 4314 transitions. [2021-11-23 02:44:36,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:44:36,273 INFO L276 IsEmpty]: Start isEmpty. Operand 3113 states and 4314 transitions. [2021-11-23 02:44:36,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-23 02:44:36,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:36,284 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:44:36,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:44:36,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:44:36,509 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:36,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:36,509 INFO L85 PathProgramCache]: Analyzing trace with hash -453680573, now seen corresponding path program 2 times [2021-11-23 02:44:36,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:36,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768974587] [2021-11-23 02:44:36,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:36,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:36,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:36,592 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-23 02:44:36,592 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:36,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768974587] [2021-11-23 02:44:36,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768974587] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:44:36,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159709214] [2021-11-23 02:44:36,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:44:36,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:44:36,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:44:36,595 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:44:36,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:44:36,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 02:44:36,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:44:36,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:44:36,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:44:36,906 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-23 02:44:36,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:44:36,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159709214] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:36,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:44:36,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-23 02:44:36,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931824649] [2021-11-23 02:44:36,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:36,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:44:36,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:36,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:44:36,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:44:36,909 INFO L87 Difference]: Start difference. First operand 3113 states and 4314 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-23 02:44:37,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:37,284 INFO L93 Difference]: Finished difference Result 6048 states and 8599 transitions. [2021-11-23 02:44:37,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:44:37,285 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 109 [2021-11-23 02:44:37,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:37,313 INFO L225 Difference]: With dead ends: 6048 [2021-11-23 02:44:37,313 INFO L226 Difference]: Without dead ends: 3710 [2021-11-23 02:44:37,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:44:37,324 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 109 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:37,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 272 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:44:37,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3710 states. [2021-11-23 02:44:37,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3710 to 3636. [2021-11-23 02:44:37,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3636 states, 2861 states have (on average 1.3579168123033905) internal successors, (3885), 2882 states have internal predecessors, (3885), 465 states have call successors, (465), 309 states have call predecessors, (465), 309 states have return successors, (677), 445 states have call predecessors, (677), 465 states have call successors, (677) [2021-11-23 02:44:37,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3636 states to 3636 states and 5027 transitions. [2021-11-23 02:44:37,620 INFO L78 Accepts]: Start accepts. Automaton has 3636 states and 5027 transitions. Word has length 109 [2021-11-23 02:44:37,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:37,621 INFO L470 AbstractCegarLoop]: Abstraction has 3636 states and 5027 transitions. [2021-11-23 02:44:37,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-23 02:44:37,622 INFO L276 IsEmpty]: Start isEmpty. Operand 3636 states and 5027 transitions. [2021-11-23 02:44:37,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-23 02:44:37,632 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:37,633 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:44:37,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:44:37,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:44:37,859 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:37,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:37,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1467970757, now seen corresponding path program 1 times [2021-11-23 02:44:37,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:37,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758501768] [2021-11-23 02:44:37,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:37,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:37,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:37,977 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-23 02:44:37,977 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:37,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758501768] [2021-11-23 02:44:37,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758501768] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:44:37,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87877261] [2021-11-23 02:44:37,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:37,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:44:37,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:44:37,980 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:44:37,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:44:38,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:38,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:44:38,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:44:38,345 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 02:44:38,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:44:38,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87877261] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:38,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:44:38,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-23 02:44:38,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384047159] [2021-11-23 02:44:38,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:38,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:44:38,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:38,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:44:38,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:44:38,349 INFO L87 Difference]: Start difference. First operand 3636 states and 5027 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-23 02:44:38,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:38,773 INFO L93 Difference]: Finished difference Result 8632 states and 12093 transitions. [2021-11-23 02:44:38,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:44:38,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 110 [2021-11-23 02:44:38,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:38,817 INFO L225 Difference]: With dead ends: 8632 [2021-11-23 02:44:38,817 INFO L226 Difference]: Without dead ends: 5003 [2021-11-23 02:44:38,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:44:38,836 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 51 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:38,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 219 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:44:38,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5003 states. [2021-11-23 02:44:39,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5003 to 4076. [2021-11-23 02:44:39,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4076 states, 3249 states have (on average 1.3804247460757155) internal successors, (4485), 3271 states have internal predecessors, (4485), 491 states have call successors, (491), 335 states have call predecessors, (491), 335 states have return successors, (703), 470 states have call predecessors, (703), 491 states have call successors, (703) [2021-11-23 02:44:39,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4076 states to 4076 states and 5679 transitions. [2021-11-23 02:44:39,300 INFO L78 Accepts]: Start accepts. Automaton has 4076 states and 5679 transitions. Word has length 110 [2021-11-23 02:44:39,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:39,301 INFO L470 AbstractCegarLoop]: Abstraction has 4076 states and 5679 transitions. [2021-11-23 02:44:39,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-23 02:44:39,302 INFO L276 IsEmpty]: Start isEmpty. Operand 4076 states and 5679 transitions. [2021-11-23 02:44:39,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-23 02:44:39,314 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:39,315 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:44:39,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:44:39,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:44:39,535 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:39,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:39,535 INFO L85 PathProgramCache]: Analyzing trace with hash 549275082, now seen corresponding path program 1 times [2021-11-23 02:44:39,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:39,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068402432] [2021-11-23 02:44:39,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:39,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:39,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:39,633 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-23 02:44:39,633 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:39,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068402432] [2021-11-23 02:44:39,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068402432] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:44:39,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295993199] [2021-11-23 02:44:39,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:39,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:44:39,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:44:39,635 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:44:39,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:44:39,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:39,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:44:39,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:44:39,963 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:44:39,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:44:39,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295993199] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:39,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:44:39,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-23 02:44:39,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533425746] [2021-11-23 02:44:39,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:39,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:44:39,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:39,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:44:39,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:44:39,966 INFO L87 Difference]: Start difference. First operand 4076 states and 5679 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:44:40,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:40,368 INFO L93 Difference]: Finished difference Result 7686 states and 10846 transitions. [2021-11-23 02:44:40,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:44:40,369 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2021-11-23 02:44:40,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:40,433 INFO L225 Difference]: With dead ends: 7686 [2021-11-23 02:44:40,433 INFO L226 Difference]: Without dead ends: 5586 [2021-11-23 02:44:40,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:44:40,445 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 65 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:40,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 276 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:44:40,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5586 states. [2021-11-23 02:44:40,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5586 to 4738. [2021-11-23 02:44:40,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4738 states, 3823 states have (on average 1.3975935129479466) internal successors, (5343), 3845 states have internal predecessors, (5343), 535 states have call successors, (535), 379 states have call predecessors, (535), 379 states have return successors, (747), 514 states have call predecessors, (747), 535 states have call successors, (747) [2021-11-23 02:44:40,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4738 states to 4738 states and 6625 transitions. [2021-11-23 02:44:40,881 INFO L78 Accepts]: Start accepts. Automaton has 4738 states and 6625 transitions. Word has length 111 [2021-11-23 02:44:40,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:40,881 INFO L470 AbstractCegarLoop]: Abstraction has 4738 states and 6625 transitions. [2021-11-23 02:44:40,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:44:40,882 INFO L276 IsEmpty]: Start isEmpty. Operand 4738 states and 6625 transitions. [2021-11-23 02:44:40,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-23 02:44:40,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:40,897 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:44:40,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:44:41,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 02:44:41,111 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:41,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:41,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1843115252, now seen corresponding path program 1 times [2021-11-23 02:44:41,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:41,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738461494] [2021-11-23 02:44:41,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:41,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-23 02:44:41,206 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:41,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738461494] [2021-11-23 02:44:41,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738461494] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:44:41,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350524433] [2021-11-23 02:44:41,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:41,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:44:41,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:44:41,208 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:44:41,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:44:41,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:41,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:44:41,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:44:41,544 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:44:41,544 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:44:41,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350524433] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:41,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:44:41,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-23 02:44:41,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877826081] [2021-11-23 02:44:41,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:41,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:44:41,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:41,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:44:41,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:44:41,546 INFO L87 Difference]: Start difference. First operand 4738 states and 6625 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:44:42,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:42,043 INFO L93 Difference]: Finished difference Result 8884 states and 12598 transitions. [2021-11-23 02:44:42,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:44:42,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2021-11-23 02:44:42,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:42,081 INFO L225 Difference]: With dead ends: 8884 [2021-11-23 02:44:42,081 INFO L226 Difference]: Without dead ends: 6409 [2021-11-23 02:44:42,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:44:42,097 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 59 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:42,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 271 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:44:42,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6409 states. [2021-11-23 02:44:42,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6409 to 5687. [2021-11-23 02:44:42,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5687 states, 4640 states have (on average 1.4099137931034482) internal successors, (6542), 4662 states have internal predecessors, (6542), 601 states have call successors, (601), 445 states have call predecessors, (601), 445 states have return successors, (813), 580 states have call predecessors, (813), 601 states have call successors, (813) [2021-11-23 02:44:42,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5687 states to 5687 states and 7956 transitions. [2021-11-23 02:44:42,579 INFO L78 Accepts]: Start accepts. Automaton has 5687 states and 7956 transitions. Word has length 111 [2021-11-23 02:44:42,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:42,579 INFO L470 AbstractCegarLoop]: Abstraction has 5687 states and 7956 transitions. [2021-11-23 02:44:42,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:44:42,580 INFO L276 IsEmpty]: Start isEmpty. Operand 5687 states and 7956 transitions. [2021-11-23 02:44:42,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-23 02:44:42,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:42,595 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:44:42,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:44:42,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-23 02:44:42,811 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:42,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:42,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1197515573, now seen corresponding path program 1 times [2021-11-23 02:44:42,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:42,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380345016] [2021-11-23 02:44:42,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:42,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:42,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:42,912 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-23 02:44:42,913 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:42,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380345016] [2021-11-23 02:44:42,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380345016] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:44:42,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210930148] [2021-11-23 02:44:42,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:42,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:44:42,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:44:42,915 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:44:42,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 02:44:43,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:43,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:44:43,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:44:43,504 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 02:44:43,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:44:43,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210930148] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:43,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:44:43,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-23 02:44:43,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245089748] [2021-11-23 02:44:43,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:43,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:44:43,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:43,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:44:43,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:44:43,506 INFO L87 Difference]: Start difference. First operand 5687 states and 7956 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 02:44:44,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:44,276 INFO L93 Difference]: Finished difference Result 13521 states and 18878 transitions. [2021-11-23 02:44:44,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:44:44,278 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 111 [2021-11-23 02:44:44,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:44,311 INFO L225 Difference]: With dead ends: 13521 [2021-11-23 02:44:44,311 INFO L226 Difference]: Without dead ends: 7841 [2021-11-23 02:44:44,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:44:44,331 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 359 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:44,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 236 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:44:44,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7841 states. [2021-11-23 02:44:44,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7841 to 7839. [2021-11-23 02:44:44,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7839 states, 6355 states have (on average 1.3830055074744296) internal successors, (8789), 6387 states have internal predecessors, (8789), 853 states have call successors, (853), 630 states have call predecessors, (853), 630 states have return successors, (1158), 822 states have call predecessors, (1158), 853 states have call successors, (1158) [2021-11-23 02:44:44,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7839 states to 7839 states and 10800 transitions. [2021-11-23 02:44:44,956 INFO L78 Accepts]: Start accepts. Automaton has 7839 states and 10800 transitions. Word has length 111 [2021-11-23 02:44:44,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:44,956 INFO L470 AbstractCegarLoop]: Abstraction has 7839 states and 10800 transitions. [2021-11-23 02:44:44,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 02:44:44,957 INFO L276 IsEmpty]: Start isEmpty. Operand 7839 states and 10800 transitions. [2021-11-23 02:44:44,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 02:44:44,977 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:44,977 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:44:45,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 02:44:45,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:44:45,191 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:45,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:45,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1602782200, now seen corresponding path program 1 times [2021-11-23 02:44:45,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:45,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714288572] [2021-11-23 02:44:45,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:45,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:45,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:45,292 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-23 02:44:45,292 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:45,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714288572] [2021-11-23 02:44:45,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714288572] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:44:45,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063228058] [2021-11-23 02:44:45,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:45,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:44:45,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:44:45,294 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:44:45,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 02:44:45,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:45,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:44:45,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:44:45,604 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:44:45,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:44:45,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063228058] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:45,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:44:45,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-23 02:44:45,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311925873] [2021-11-23 02:44:45,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:45,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:44:45,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:45,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:44:45,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:44:45,606 INFO L87 Difference]: Start difference. First operand 7839 states and 10800 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:44:46,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:46,233 INFO L93 Difference]: Finished difference Result 13435 states and 19029 transitions. [2021-11-23 02:44:46,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:44:46,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 112 [2021-11-23 02:44:46,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:46,268 INFO L225 Difference]: With dead ends: 13435 [2021-11-23 02:44:46,269 INFO L226 Difference]: Without dead ends: 7859 [2021-11-23 02:44:46,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:44:46,292 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 90 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:46,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 267 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:44:46,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7859 states. [2021-11-23 02:44:46,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7859 to 7743. [2021-11-23 02:44:46,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7743 states, 6259 states have (on average 1.3562869467966128) internal successors, (8489), 6291 states have internal predecessors, (8489), 853 states have call successors, (853), 630 states have call predecessors, (853), 630 states have return successors, (1158), 822 states have call predecessors, (1158), 853 states have call successors, (1158) [2021-11-23 02:44:47,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7743 states to 7743 states and 10500 transitions. [2021-11-23 02:44:47,018 INFO L78 Accepts]: Start accepts. Automaton has 7743 states and 10500 transitions. Word has length 112 [2021-11-23 02:44:47,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:47,018 INFO L470 AbstractCegarLoop]: Abstraction has 7743 states and 10500 transitions. [2021-11-23 02:44:47,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:44:47,019 INFO L276 IsEmpty]: Start isEmpty. Operand 7743 states and 10500 transitions. [2021-11-23 02:44:47,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 02:44:47,041 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:47,042 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:44:47,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 02:44:47,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-23 02:44:47,263 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:47,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:47,263 INFO L85 PathProgramCache]: Analyzing trace with hash 628546938, now seen corresponding path program 1 times [2021-11-23 02:44:47,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:47,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126858106] [2021-11-23 02:44:47,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:47,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:47,339 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 19 proven. 25 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-23 02:44:47,339 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:47,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126858106] [2021-11-23 02:44:47,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126858106] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:44:47,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225869156] [2021-11-23 02:44:47,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:47,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:44:47,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:44:47,342 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:44:47,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 02:44:47,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:47,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:44:47,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:44:47,734 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-23 02:44:47,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:44:47,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225869156] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:47,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:44:47,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2021-11-23 02:44:47,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638906271] [2021-11-23 02:44:47,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:47,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:44:47,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:47,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:44:47,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:44:47,737 INFO L87 Difference]: Start difference. First operand 7743 states and 10500 transitions. Second operand has 6 states, 5 states have (on average 14.4) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 02:44:48,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:48,651 INFO L93 Difference]: Finished difference Result 18441 states and 24941 transitions. [2021-11-23 02:44:48,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:44:48,652 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.4) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 112 [2021-11-23 02:44:48,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:48,697 INFO L225 Difference]: With dead ends: 18441 [2021-11-23 02:44:48,697 INFO L226 Difference]: Without dead ends: 10705 [2021-11-23 02:44:48,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:44:48,720 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 365 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:48,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 220 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:44:48,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10705 states. [2021-11-23 02:44:49,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10705 to 10703. [2021-11-23 02:44:49,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10703 states, 8597 states have (on average 1.3277887635221588) internal successors, (11415), 8644 states have internal predecessors, (11415), 1212 states have call successors, (1212), 893 states have call predecessors, (1212), 893 states have return successors, (1648), 1166 states have call predecessors, (1648), 1212 states have call successors, (1648) [2021-11-23 02:44:49,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10703 states to 10703 states and 14275 transitions. [2021-11-23 02:44:49,604 INFO L78 Accepts]: Start accepts. Automaton has 10703 states and 14275 transitions. Word has length 112 [2021-11-23 02:44:49,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:49,604 INFO L470 AbstractCegarLoop]: Abstraction has 10703 states and 14275 transitions. [2021-11-23 02:44:49,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.4) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 02:44:49,605 INFO L276 IsEmpty]: Start isEmpty. Operand 10703 states and 14275 transitions. [2021-11-23 02:44:49,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-23 02:44:49,644 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:49,644 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:44:49,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 02:44:49,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 02:44:49,871 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:49,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:49,871 INFO L85 PathProgramCache]: Analyzing trace with hash 297995306, now seen corresponding path program 1 times [2021-11-23 02:44:49,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:49,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728663415] [2021-11-23 02:44:49,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:49,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:49,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:49,959 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 02:44:49,959 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:49,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728663415] [2021-11-23 02:44:49,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728663415] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:44:49,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781115740] [2021-11-23 02:44:49,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:49,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:44:49,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:44:49,961 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:44:49,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 02:44:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:50,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:44:50,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:44:50,387 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 02:44:50,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:44:50,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781115740] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:50,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:44:50,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2021-11-23 02:44:50,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719510156] [2021-11-23 02:44:50,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:50,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:44:50,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:50,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:44:50,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:44:50,390 INFO L87 Difference]: Start difference. First operand 10703 states and 14275 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-23 02:44:51,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:51,273 INFO L93 Difference]: Finished difference Result 16340 states and 21632 transitions. [2021-11-23 02:44:51,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:44:51,274 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 116 [2021-11-23 02:44:51,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:51,314 INFO L225 Difference]: With dead ends: 16340 [2021-11-23 02:44:51,314 INFO L226 Difference]: Without dead ends: 11174 [2021-11-23 02:44:51,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:44:51,325 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 106 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:51,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 417 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:44:51,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11174 states. [2021-11-23 02:44:52,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11174 to 10945. [2021-11-23 02:44:52,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10945 states, 8792 states have (on average 1.3248407643312101) internal successors, (11648), 8857 states have internal predecessors, (11648), 1219 states have call successors, (1219), 897 states have call predecessors, (1219), 933 states have return successors, (1709), 1191 states have call predecessors, (1709), 1219 states have call successors, (1709) [2021-11-23 02:44:52,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10945 states to 10945 states and 14576 transitions. [2021-11-23 02:44:52,225 INFO L78 Accepts]: Start accepts. Automaton has 10945 states and 14576 transitions. Word has length 116 [2021-11-23 02:44:52,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:52,226 INFO L470 AbstractCegarLoop]: Abstraction has 10945 states and 14576 transitions. [2021-11-23 02:44:52,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-23 02:44:52,226 INFO L276 IsEmpty]: Start isEmpty. Operand 10945 states and 14576 transitions. [2021-11-23 02:44:52,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-23 02:44:52,270 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:52,270 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:44:52,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 02:44:52,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:44:52,499 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:52,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:52,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1272080199, now seen corresponding path program 1 times [2021-11-23 02:44:52,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:52,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583949042] [2021-11-23 02:44:52,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:52,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:52,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:52,655 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-23 02:44:52,655 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:52,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583949042] [2021-11-23 02:44:52,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583949042] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:44:52,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997908849] [2021-11-23 02:44:52,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:52,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:44:52,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:44:52,657 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:44:52,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 02:44:52,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:52,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:44:52,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:44:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-23 02:44:53,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:44:53,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997908849] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:53,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:44:53,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-11-23 02:44:53,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562996611] [2021-11-23 02:44:53,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:53,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:44:53,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:53,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:44:53,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:44:53,032 INFO L87 Difference]: Start difference. First operand 10945 states and 14576 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-23 02:44:54,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:54,026 INFO L93 Difference]: Finished difference Result 16057 states and 21446 transitions. [2021-11-23 02:44:54,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:44:54,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 117 [2021-11-23 02:44:54,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:54,084 INFO L225 Difference]: With dead ends: 16057 [2021-11-23 02:44:54,084 INFO L226 Difference]: Without dead ends: 10687 [2021-11-23 02:44:54,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:44:54,106 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 22 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:54,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 213 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:44:54,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10687 states. [2021-11-23 02:44:54,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10687 to 10687. [2021-11-23 02:44:54,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10687 states, 8570 states have (on average 1.3248541423570594) internal successors, (11354), 8626 states have internal predecessors, (11354), 1219 states have call successors, (1219), 897 states have call predecessors, (1219), 897 states have return successors, (1655), 1164 states have call predecessors, (1655), 1219 states have call successors, (1655) [2021-11-23 02:44:55,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10687 states to 10687 states and 14228 transitions. [2021-11-23 02:44:55,101 INFO L78 Accepts]: Start accepts. Automaton has 10687 states and 14228 transitions. Word has length 117 [2021-11-23 02:44:55,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:55,103 INFO L470 AbstractCegarLoop]: Abstraction has 10687 states and 14228 transitions. [2021-11-23 02:44:55,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-23 02:44:55,104 INFO L276 IsEmpty]: Start isEmpty. Operand 10687 states and 14228 transitions. [2021-11-23 02:44:55,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-23 02:44:55,128 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:55,128 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:44:55,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 02:44:55,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:44:55,343 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:55,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:55,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1150203637, now seen corresponding path program 1 times [2021-11-23 02:44:55,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:55,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126726807] [2021-11-23 02:44:55,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:55,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:55,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:55,454 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-23 02:44:55,454 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:55,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126726807] [2021-11-23 02:44:55,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126726807] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:44:55,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417242784] [2021-11-23 02:44:55,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:55,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:44:55,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:44:55,456 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:44:55,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 02:44:55,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:55,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:44:55,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:44:55,881 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:44:55,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:44:55,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417242784] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:55,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:44:55,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2021-11-23 02:44:55,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033405821] [2021-11-23 02:44:55,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:55,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:44:55,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:55,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:44:55,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:44:55,883 INFO L87 Difference]: Start difference. First operand 10687 states and 14228 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-23 02:44:56,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:56,657 INFO L93 Difference]: Finished difference Result 19676 states and 26675 transitions. [2021-11-23 02:44:56,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:44:56,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 117 [2021-11-23 02:44:56,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:56,714 INFO L225 Difference]: With dead ends: 19676 [2021-11-23 02:44:56,714 INFO L226 Difference]: Without dead ends: 12194 [2021-11-23 02:44:56,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:44:56,737 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 78 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:56,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 153 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:44:56,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12194 states. [2021-11-23 02:44:57,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12194 to 12054. [2021-11-23 02:44:57,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12054 states, 9829 states have (on average 1.2997253026757554) internal successors, (12775), 9885 states have internal predecessors, (12775), 1232 states have call successors, (1232), 992 states have call predecessors, (1232), 992 states have return successors, (1844), 1177 states have call predecessors, (1844), 1232 states have call successors, (1844) [2021-11-23 02:44:57,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12054 states to 12054 states and 15851 transitions. [2021-11-23 02:44:57,592 INFO L78 Accepts]: Start accepts. Automaton has 12054 states and 15851 transitions. Word has length 117 [2021-11-23 02:44:57,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:57,593 INFO L470 AbstractCegarLoop]: Abstraction has 12054 states and 15851 transitions. [2021-11-23 02:44:57,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-23 02:44:57,593 INFO L276 IsEmpty]: Start isEmpty. Operand 12054 states and 15851 transitions. [2021-11-23 02:44:57,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-23 02:44:57,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:57,611 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:44:57,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 02:44:57,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:44:57,839 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:57,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:57,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1705256235, now seen corresponding path program 1 times [2021-11-23 02:44:57,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:57,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668422103] [2021-11-23 02:44:57,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:57,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:57,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:57,893 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-23 02:44:57,894 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:57,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668422103] [2021-11-23 02:44:57,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668422103] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:44:57,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580112571] [2021-11-23 02:44:57,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:57,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:44:57,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:44:57,896 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:44:57,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 02:44:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:58,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:44:58,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:44:58,247 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 02:44:58,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:44:58,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580112571] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:58,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:44:58,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-11-23 02:44:58,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946392468] [2021-11-23 02:44:58,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:58,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:44:58,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:58,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:44:58,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:44:58,250 INFO L87 Difference]: Start difference. First operand 12054 states and 15851 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:44:58,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:58,980 INFO L93 Difference]: Finished difference Result 20438 states and 27675 transitions. [2021-11-23 02:44:58,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:44:58,982 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 117 [2021-11-23 02:44:58,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:59,029 INFO L225 Difference]: With dead ends: 20438 [2021-11-23 02:44:59,030 INFO L226 Difference]: Without dead ends: 12029 [2021-11-23 02:44:59,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:44:59,057 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 87 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:59,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 274 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:44:59,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12029 states. [2021-11-23 02:44:59,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12029 to 11878. [2021-11-23 02:44:59,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11878 states, 9653 states have (on average 1.2701750751061847) internal successors, (12261), 9709 states have internal predecessors, (12261), 1232 states have call successors, (1232), 992 states have call predecessors, (1232), 992 states have return successors, (1844), 1177 states have call predecessors, (1844), 1232 states have call successors, (1844) [2021-11-23 02:44:59,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11878 states to 11878 states and 15337 transitions. [2021-11-23 02:44:59,999 INFO L78 Accepts]: Start accepts. Automaton has 11878 states and 15337 transitions. Word has length 117 [2021-11-23 02:45:00,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:45:00,000 INFO L470 AbstractCegarLoop]: Abstraction has 11878 states and 15337 transitions. [2021-11-23 02:45:00,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:45:00,000 INFO L276 IsEmpty]: Start isEmpty. Operand 11878 states and 15337 transitions. [2021-11-23 02:45:00,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-23 02:45:00,015 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:45:00,015 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:45:00,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 02:45:00,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-23 02:45:00,243 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:45:00,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:45:00,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1345293798, now seen corresponding path program 1 times [2021-11-23 02:45:00,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:45:00,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872006846] [2021-11-23 02:45:00,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:45:00,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:45:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:45:00,493 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-23 02:45:00,493 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:45:00,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872006846] [2021-11-23 02:45:00,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872006846] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:45:00,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242527901] [2021-11-23 02:45:00,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:45:00,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:45:00,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:45:00,496 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:45:00,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 02:45:00,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:45:00,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 02:45:00,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:45:01,208 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 43 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 02:45:01,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:45:01,723 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-23 02:45:01,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242527901] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:45:01,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:45:01,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11, 8] total 20 [2021-11-23 02:45:01,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887926425] [2021-11-23 02:45:01,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:45:01,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:45:01,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:45:01,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:45:01,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:45:01,726 INFO L87 Difference]: Start difference. First operand 11878 states and 15337 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-23 02:45:02,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:45:02,905 INFO L93 Difference]: Finished difference Result 24030 states and 31163 transitions. [2021-11-23 02:45:02,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:45:02,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 114 [2021-11-23 02:45:02,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:45:02,948 INFO L225 Difference]: With dead ends: 24030 [2021-11-23 02:45:02,949 INFO L226 Difference]: Without dead ends: 13452 [2021-11-23 02:45:02,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:45:02,984 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 103 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:45:02,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 273 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:45:03,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13452 states. [2021-11-23 02:45:04,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13452 to 13083. [2021-11-23 02:45:04,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13083 states, 10783 states have (on average 1.2501159232124641) internal successors, (13480), 10848 states have internal predecessors, (13480), 1238 states have call successors, (1238), 1052 states have call predecessors, (1238), 1061 states have return successors, (1811), 1183 states have call predecessors, (1811), 1238 states have call successors, (1811) [2021-11-23 02:45:04,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13083 states to 13083 states and 16529 transitions. [2021-11-23 02:45:04,240 INFO L78 Accepts]: Start accepts. Automaton has 13083 states and 16529 transitions. Word has length 114 [2021-11-23 02:45:04,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:45:04,241 INFO L470 AbstractCegarLoop]: Abstraction has 13083 states and 16529 transitions. [2021-11-23 02:45:04,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-23 02:45:04,241 INFO L276 IsEmpty]: Start isEmpty. Operand 13083 states and 16529 transitions. [2021-11-23 02:45:04,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-23 02:45:04,263 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:45:04,264 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:45:04,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 02:45:04,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:45:04,491 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:45:04,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:45:04,491 INFO L85 PathProgramCache]: Analyzing trace with hash -387140788, now seen corresponding path program 1 times [2021-11-23 02:45:04,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:45:04,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919063623] [2021-11-23 02:45:04,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:45:04,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:45:04,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:45:04,582 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-23 02:45:04,582 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:45:04,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919063623] [2021-11-23 02:45:04,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919063623] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:45:04,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:45:04,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:45:04,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062289486] [2021-11-23 02:45:04,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:45:04,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:45:04,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:45:04,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:45:04,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:45:04,585 INFO L87 Difference]: Start difference. First operand 13083 states and 16529 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-23 02:45:06,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:45:06,198 INFO L93 Difference]: Finished difference Result 33311 states and 42111 transitions. [2021-11-23 02:45:06,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:45:06,198 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 115 [2021-11-23 02:45:06,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:45:06,250 INFO L225 Difference]: With dead ends: 33311 [2021-11-23 02:45:06,250 INFO L226 Difference]: Without dead ends: 17266 [2021-11-23 02:45:06,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:45:06,284 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 96 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:45:06,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 418 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:45:06,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17266 states. [2021-11-23 02:45:07,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17266 to 16768. [2021-11-23 02:45:07,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16768 states, 13681 states have (on average 1.2340472187705578) internal successors, (16883), 13803 states have internal predecessors, (16883), 1672 states have call successors, (1672), 1405 states have call predecessors, (1672), 1414 states have return successors, (2437), 1560 states have call predecessors, (2437), 1672 states have call successors, (2437) [2021-11-23 02:45:07,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16768 states to 16768 states and 20992 transitions. [2021-11-23 02:45:07,307 INFO L78 Accepts]: Start accepts. Automaton has 16768 states and 20992 transitions. Word has length 115 [2021-11-23 02:45:07,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:45:07,308 INFO L470 AbstractCegarLoop]: Abstraction has 16768 states and 20992 transitions. [2021-11-23 02:45:07,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-23 02:45:07,308 INFO L276 IsEmpty]: Start isEmpty. Operand 16768 states and 20992 transitions. [2021-11-23 02:45:07,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-23 02:45:07,320 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:45:07,320 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:45:07,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-23 02:45:07,320 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:45:07,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:45:07,321 INFO L85 PathProgramCache]: Analyzing trace with hash -264235060, now seen corresponding path program 1 times [2021-11-23 02:45:07,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:45:07,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568331507] [2021-11-23 02:45:07,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:45:07,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:45:07,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:45:07,503 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 13 proven. 43 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 02:45:07,503 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:45:07,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568331507] [2021-11-23 02:45:07,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568331507] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:45:07,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249122671] [2021-11-23 02:45:07,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:45:07,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:45:07,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:45:07,511 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:45:07,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 02:45:07,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:45:07,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:45:07,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:45:08,010 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 62 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:45:08,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:45:08,651 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-23 02:45:08,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249122671] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:45:08,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1659437013] [2021-11-23 02:45:08,693 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2021-11-23 02:45:08,693 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:45:08,701 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:45:08,707 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:45:08,708 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:45:35,364 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 207 for LOIs [2021-11-23 02:45:45,804 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 150 for LOIs [2021-11-23 02:45:45,861 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 215 for LOIs [2021-11-23 02:45:45,956 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 158 for LOIs [2021-11-23 02:45:46,581 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 65 for LOIs [2021-11-23 02:45:50,505 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 247 for LOIs [2021-11-23 02:45:56,319 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:46:08,969 WARN L227 SmtUtils]: Spent 10.35s on a formula simplification. DAG size of input: 300 DAG size of output: 249 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:46:33,519 WARN L227 SmtUtils]: Spent 6.22s on a formula simplification. DAG size of input: 425 DAG size of output: 297 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:46:55,200 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '513237#(and (= ~p_dw_pc~0 0) (= ~c_dr_st~0 0) (= ~p_num_write~0 0) (= ~c_num_read~0 0) (= ~q_buf_0~0 0) (= ~t1_pc~0 0) (= ~t1_i~0 1) (= ~slow_clk_edge~0 0) (= ~p_last_write~0 0) (<= 0 (+ |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483648)) (= ~c_last_read~0 0) (= 0 ~c_dr_i~0) (= ~q_free~0 0) (= 0 ~t3_pc~0) (<= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483647) (= ~q_req_up~0 0) (= ~fast_clk_edge~0 0) (= ~q_ev~0 0) (= ~m_pc~0 1) (= ~p_dw_i~0 0) (= ~m_i~0 1) (= |ULTIMATE.start_start_simulation2_~kernel_st~1#1| 1) (= ~t~0 0) (<= 0 |ULTIMATE.start_eval2_~tmp~5#1|) (not (= ~token~0 (+ 3 ~local~0))) (<= |ULTIMATE.start_eval2_~tmp~5#1| 1) (= ~p_dw_st~0 0) (= ~t2_i~0 1) (= ~q_write_ev~0 0) (= ~c_dr_pc~0 0) (= 0 ~t2_pc~0) (= ~q_read_ev~0 0) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~a_t~0 0) (= ~t3_i~0 1) (<= 0 |#StackHeapBarrier|) (not (= |ULTIMATE.start_eval2_~tmp~5#1| 0)) (not (= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 0)) (= |#NULL.base| 0))' at error location [2021-11-23 02:46:55,200 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:46:55,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:46:55,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 6] total 21 [2021-11-23 02:46:55,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375932693] [2021-11-23 02:46:55,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:46:55,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 02:46:55,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:46:55,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 02:46:55,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=4627, Unknown=0, NotChecked=0, Total=5112 [2021-11-23 02:46:55,205 INFO L87 Difference]: Start difference. First operand 16768 states and 20992 transitions. Second operand has 21 states, 17 states have (on average 9.0) internal successors, (153), 19 states have internal predecessors, (153), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2021-11-23 02:47:03,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:47:03,650 INFO L93 Difference]: Finished difference Result 34177 states and 43159 transitions. [2021-11-23 02:47:03,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2021-11-23 02:47:03,651 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 9.0) internal successors, (153), 19 states have internal predecessors, (153), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) Word has length 120 [2021-11-23 02:47:03,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:47:03,692 INFO L225 Difference]: With dead ends: 34177 [2021-11-23 02:47:03,692 INFO L226 Difference]: Without dead ends: 17368 [2021-11-23 02:47:03,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 387 SyntacticMatches, 13 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22621 ImplicationChecksByTransitivity, 62.5s TimeCoverageRelationStatistics Valid=3345, Invalid=47055, Unknown=0, NotChecked=0, Total=50400 [2021-11-23 02:47:03,743 INFO L933 BasicCegarLoop]: 422 mSDtfsCounter, 3021 mSDsluCounter, 4108 mSDsCounter, 0 mSdLazyCounter, 4136 mSolverCounterSat, 1360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3027 SdHoareTripleChecker+Valid, 3902 SdHoareTripleChecker+Invalid, 5496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1360 IncrementalHoareTripleChecker+Valid, 4136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:47:03,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3027 Valid, 3902 Invalid, 5496 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1360 Valid, 4136 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-23 02:47:03,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17368 states. [2021-11-23 02:47:04,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17368 to 12185. [2021-11-23 02:47:04,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12185 states, 10015 states have (on average 1.2227658512231652) internal successors, (12246), 10081 states have internal predecessors, (12246), 1137 states have call successors, (1137), 1029 states have call predecessors, (1137), 1032 states have return successors, (1411), 1074 states have call predecessors, (1411), 1137 states have call successors, (1411) [2021-11-23 02:47:04,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12185 states to 12185 states and 14794 transitions. [2021-11-23 02:47:04,813 INFO L78 Accepts]: Start accepts. Automaton has 12185 states and 14794 transitions. Word has length 120 [2021-11-23 02:47:04,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:47:04,814 INFO L470 AbstractCegarLoop]: Abstraction has 12185 states and 14794 transitions. [2021-11-23 02:47:04,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 9.0) internal successors, (153), 19 states have internal predecessors, (153), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2021-11-23 02:47:04,814 INFO L276 IsEmpty]: Start isEmpty. Operand 12185 states and 14794 transitions. [2021-11-23 02:47:04,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-23 02:47:04,824 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:47:04,825 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:47:04,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 02:47:05,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-23 02:47:05,051 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:47:05,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:47:05,052 INFO L85 PathProgramCache]: Analyzing trace with hash -2116739977, now seen corresponding path program 1 times [2021-11-23 02:47:05,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:47:05,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533205853] [2021-11-23 02:47:05,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:47:05,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:47:05,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:47:05,133 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 41 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-23 02:47:05,133 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:47:05,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533205853] [2021-11-23 02:47:05,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533205853] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:47:05,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820363826] [2021-11-23 02:47:05,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:47:05,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:47:05,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:47:05,142 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:47:05,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 02:47:05,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:47:05,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 02:47:05,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:47:05,521 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:47:05,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:47:05,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820363826] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:47:05,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:47:05,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2021-11-23 02:47:05,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132045821] [2021-11-23 02:47:05,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:47:05,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:47:05,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:47:05,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:47:05,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:47:05,523 INFO L87 Difference]: Start difference. First operand 12185 states and 14794 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-23 02:47:06,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:47:06,652 INFO L93 Difference]: Finished difference Result 23388 states and 28505 transitions. [2021-11-23 02:47:06,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:47:06,653 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 116 [2021-11-23 02:47:06,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:47:06,691 INFO L225 Difference]: With dead ends: 23388 [2021-11-23 02:47:06,691 INFO L226 Difference]: Without dead ends: 14854 [2021-11-23 02:47:06,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:47:06,712 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 197 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:47:06,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 358 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:47:06,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14854 states. [2021-11-23 02:47:07,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14854 to 13364. [2021-11-23 02:47:07,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13364 states, 10915 states have (on average 1.2114521300961978) internal successors, (13223), 11005 states have internal predecessors, (13223), 1285 states have call successors, (1285), 1141 states have call predecessors, (1285), 1163 states have return successors, (1695), 1217 states have call predecessors, (1695), 1285 states have call successors, (1695) [2021-11-23 02:47:07,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13364 states to 13364 states and 16203 transitions. [2021-11-23 02:47:07,845 INFO L78 Accepts]: Start accepts. Automaton has 13364 states and 16203 transitions. Word has length 116 [2021-11-23 02:47:07,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:47:07,845 INFO L470 AbstractCegarLoop]: Abstraction has 13364 states and 16203 transitions. [2021-11-23 02:47:07,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-23 02:47:07,846 INFO L276 IsEmpty]: Start isEmpty. Operand 13364 states and 16203 transitions. [2021-11-23 02:47:07,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-23 02:47:07,852 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:47:07,853 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:47:07,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-23 02:47:08,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-23 02:47:08,053 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:47:08,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:47:08,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1702646528, now seen corresponding path program 1 times [2021-11-23 02:47:08,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:47:08,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121901488] [2021-11-23 02:47:08,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:47:08,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:47:08,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:47:08,158 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 17 proven. 26 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-23 02:47:08,159 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:47:08,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121901488] [2021-11-23 02:47:08,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121901488] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:47:08,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207479075] [2021-11-23 02:47:08,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:47:08,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:47:08,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:47:08,161 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:47:08,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 02:47:08,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:47:08,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 02:47:08,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:47:08,686 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 62 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:47:08,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:47:09,203 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-23 02:47:09,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207479075] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:47:09,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [47493829] [2021-11-23 02:47:09,208 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2021-11-23 02:47:09,208 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:47:09,209 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:47:09,210 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:47:09,210 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:47:21,043 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 204 for LOIs [2021-11-23 02:47:55,610 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 140 for LOIs [2021-11-23 02:47:55,655 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 215 for LOIs [2021-11-23 02:47:55,749 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 146 for LOIs [2021-11-23 02:47:55,950 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 140 for LOIs [2021-11-23 02:47:57,518 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 247 for LOIs [2021-11-23 02:48:00,445 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:48:47,107 WARN L227 SmtUtils]: Spent 30.03s on a formula simplification. DAG size of input: 768 DAG size of output: 502 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:49:08,616 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '627939#(and (= ~p_dw_pc~0 0) (= ~c_dr_st~0 0) (<= ~t1_pc~0 1) (= ~p_num_write~0 0) (<= ~local~0 2147483647) (= ~c_num_read~0 0) (= ~q_buf_0~0 0) (= ~t1_i~0 1) (= ~slow_clk_edge~0 0) (= ~p_last_write~0 0) (<= 0 (+ ~local~0 2147483648)) (<= 0 (+ |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483648)) (= ~c_last_read~0 0) (= 0 ~c_dr_i~0) (= ~q_free~0 0) (= 0 ~t3_pc~0) (<= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483647) (= ~q_req_up~0 0) (= ~fast_clk_edge~0 0) (= ~q_ev~0 0) (= ~m_pc~0 1) (= ~p_dw_i~0 0) (= ~m_i~0 1) (= |ULTIMATE.start_start_simulation2_~kernel_st~1#1| 1) (= ~t~0 0) (<= 0 |ULTIMATE.start_eval2_~tmp~5#1|) (not (= ~token~0 (+ 3 ~local~0))) (<= |ULTIMATE.start_eval2_~tmp~5#1| 1) (= ~p_dw_st~0 0) (= ~t2_i~0 1) (= ~q_write_ev~0 0) (= ~c_dr_pc~0 0) (= 0 ~t2_pc~0) (= ~q_read_ev~0 0) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (= ~a_t~0 0) (= ~t3_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2021-11-23 02:49:08,616 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:49:08,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:49:08,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 6] total 17 [2021-11-23 02:49:08,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52996379] [2021-11-23 02:49:08,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:49:08,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 02:49:08,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:49:08,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 02:49:08,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=521, Invalid=4035, Unknown=0, NotChecked=0, Total=4556 [2021-11-23 02:49:08,621 INFO L87 Difference]: Start difference. First operand 13364 states and 16203 transitions. Second operand has 17 states, 14 states have (on average 9.642857142857142) internal successors, (135), 15 states have internal predecessors, (135), 7 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 6 states have call predecessors, (30), 7 states have call successors, (30) [2021-11-23 02:49:15,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:15,059 INFO L93 Difference]: Finished difference Result 27514 states and 34631 transitions. [2021-11-23 02:49:15,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-11-23 02:49:15,059 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 9.642857142857142) internal successors, (135), 15 states have internal predecessors, (135), 7 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 6 states have call predecessors, (30), 7 states have call successors, (30) Word has length 123 [2021-11-23 02:49:15,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:15,094 INFO L225 Difference]: With dead ends: 27514 [2021-11-23 02:49:15,094 INFO L226 Difference]: Without dead ends: 16189 [2021-11-23 02:49:15,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 369 SyntacticMatches, 8 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18344 ImplicationChecksByTransitivity, 71.0s TimeCoverageRelationStatistics Valid=3269, Invalid=38551, Unknown=0, NotChecked=0, Total=41820 [2021-11-23 02:49:15,112 INFO L933 BasicCegarLoop]: 627 mSDtfsCounter, 1618 mSDsluCounter, 5082 mSDsCounter, 0 mSdLazyCounter, 3139 mSolverCounterSat, 649 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1631 SdHoareTripleChecker+Valid, 4968 SdHoareTripleChecker+Invalid, 3788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 649 IncrementalHoareTripleChecker+Valid, 3139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:15,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1631 Valid, 4968 Invalid, 3788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [649 Valid, 3139 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-23 02:49:15,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16189 states. [2021-11-23 02:49:15,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16189 to 9661. [2021-11-23 02:49:15,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9661 states, 7974 states have (on average 1.2149485828944069) internal successors, (9688), 8034 states have internal predecessors, (9688), 858 states have call successors, (858), 810 states have call predecessors, (858), 828 states have return successors, (1182), 816 states have call predecessors, (1182), 858 states have call successors, (1182) [2021-11-23 02:49:15,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9661 states to 9661 states and 11728 transitions. [2021-11-23 02:49:15,949 INFO L78 Accepts]: Start accepts. Automaton has 9661 states and 11728 transitions. Word has length 123 [2021-11-23 02:49:15,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:15,950 INFO L470 AbstractCegarLoop]: Abstraction has 9661 states and 11728 transitions. [2021-11-23 02:49:15,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 9.642857142857142) internal successors, (135), 15 states have internal predecessors, (135), 7 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 6 states have call predecessors, (30), 7 states have call successors, (30) [2021-11-23 02:49:15,951 INFO L276 IsEmpty]: Start isEmpty. Operand 9661 states and 11728 transitions. [2021-11-23 02:49:15,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-23 02:49:15,958 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:15,959 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:49:16,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-23 02:49:16,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-23 02:49:16,187 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:49:16,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:16,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1901374219, now seen corresponding path program 1 times [2021-11-23 02:49:16,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:49:16,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050913] [2021-11-23 02:49:16,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:16,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:49:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:16,288 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-23 02:49:16,288 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:49:16,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050913] [2021-11-23 02:49:16,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050913] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:49:16,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540081459] [2021-11-23 02:49:16,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:16,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:49:16,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:49:16,291 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:49:16,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-23 02:49:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:16,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 02:49:16,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:16,843 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 60 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:49:16,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:49:17,316 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 02:49:17,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540081459] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:49:17,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1194937050] [2021-11-23 02:49:17,320 INFO L159 IcfgInterpreter]: Started Sifa with 74 locations of interest [2021-11-23 02:49:17,320 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:49:17,321 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:49:17,321 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:49:17,322 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:49:29,567 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 204 for LOIs [2021-11-23 02:50:45,159 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 140 for LOIs [2021-11-23 02:50:45,203 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 215 for LOIs [2021-11-23 02:50:45,282 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 146 for LOIs [2021-11-23 02:50:45,499 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 140 for LOIs [2021-11-23 02:50:46,741 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 247 for LOIs [2021-11-23 02:50:48,468 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:51:47,867 WARN L227 SmtUtils]: Spent 45.70s on a formula simplification. DAG size of input: 1386 DAG size of output: 926 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:52:05,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1194937050] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:52:05,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:52:05,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [8, 10, 6] total 68 [2021-11-23 02:52:05,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170739727] [2021-11-23 02:52:05,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:52:05,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-23 02:52:05,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:52:05,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-23 02:52:05,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=503, Invalid=4053, Unknown=0, NotChecked=0, Total=4556 [2021-11-23 02:52:05,854 INFO L87 Difference]: Start difference. First operand 9661 states and 11728 transitions. Second operand has 52 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 39 states have internal predecessors, (59), 11 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-23 02:52:32,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:52:32,870 INFO L93 Difference]: Finished difference Result 17475 states and 21225 transitions. [2021-11-23 02:52:32,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-23 02:52:32,870 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 39 states have internal predecessors, (59), 11 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) Word has length 125 [2021-11-23 02:52:32,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:52:32,886 INFO L225 Difference]: With dead ends: 17475 [2021-11-23 02:52:32,886 INFO L226 Difference]: Without dead ends: 7901 [2021-11-23 02:52:32,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 312 SyntacticMatches, 4 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3458 ImplicationChecksByTransitivity, 100.8s TimeCoverageRelationStatistics Valid=1026, Invalid=8480, Unknown=0, NotChecked=0, Total=9506 [2021-11-23 02:52:32,900 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 254 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 2282 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 1364 SdHoareTripleChecker+Invalid, 2392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 2282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:52:32,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 1364 Invalid, 2392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 2282 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-23 02:52:32,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7901 states. [2021-11-23 02:52:33,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7901 to 7776. [2021-11-23 02:52:33,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7776 states, 6392 states have (on average 1.2076032540675845) internal successors, (7719), 6448 states have internal predecessors, (7719), 700 states have call successors, (700), 664 states have call predecessors, (700), 683 states have return successors, (1006), 663 states have call predecessors, (1006), 700 states have call successors, (1006) [2021-11-23 02:52:33,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7776 states to 7776 states and 9425 transitions. [2021-11-23 02:52:33,406 INFO L78 Accepts]: Start accepts. Automaton has 7776 states and 9425 transitions. Word has length 125 [2021-11-23 02:52:33,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:52:33,406 INFO L470 AbstractCegarLoop]: Abstraction has 7776 states and 9425 transitions. [2021-11-23 02:52:33,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 39 states have internal predecessors, (59), 11 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-23 02:52:33,406 INFO L276 IsEmpty]: Start isEmpty. Operand 7776 states and 9425 transitions. [2021-11-23 02:52:33,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-23 02:52:33,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:52:33,410 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:52:33,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-23 02:52:33,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-23 02:52:33,610 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:52:33,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:52:33,611 INFO L85 PathProgramCache]: Analyzing trace with hash -710864486, now seen corresponding path program 1 times [2021-11-23 02:52:33,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:52:33,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547894292] [2021-11-23 02:52:33,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:52:33,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:52:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:52:33,905 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 23 proven. 31 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:52:33,906 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:52:33,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547894292] [2021-11-23 02:52:33,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547894292] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:52:33,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900072257] [2021-11-23 02:52:33,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:52:33,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:52:33,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:52:33,910 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:52:33,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-23 02:52:34,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:52:34,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-23 02:52:34,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:52:34,562 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 02:52:34,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:52:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-23 02:52:35,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900072257] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:52:35,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [726425245] [2021-11-23 02:52:35,368 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2021-11-23 02:52:35,368 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:52:35,369 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:52:35,369 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:52:35,369 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:53:02,488 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 140 for LOIs [2021-11-23 02:53:02,546 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 79 for LOIs [2021-11-23 02:53:02,561 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 137 for LOIs [2021-11-23 02:53:02,595 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 146 for LOIs [2021-11-23 02:53:02,766 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 167 for LOIs [2021-11-23 02:53:03,577 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 137 for LOIs [2021-11-23 02:53:03,634 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:53:36,309 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '714339#(and (= ~p_dw_pc~0 0) (= ~c_dr_st~0 0) (<= ~t1_pc~0 1) (= ~p_num_write~0 0) (<= ~local~0 2147483647) (= ~c_num_read~0 0) (= ~q_buf_0~0 0) (= ~t1_i~0 1) (= ~slow_clk_edge~0 0) (= ~p_last_write~0 0) (<= 0 (+ ~local~0 2147483648)) (<= 0 (+ |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483648)) (<= 0 ~t2_pc~0) (= ~c_last_read~0 0) (= 0 ~c_dr_i~0) (= ~q_free~0 0) (<= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483647) (= ~q_req_up~0 0) (= ~fast_clk_edge~0 0) (= ~q_ev~0 0) (= ~m_pc~0 1) (<= ~t2_pc~0 1) (= ~p_dw_i~0 0) (= ~m_i~0 1) (= |ULTIMATE.start_start_simulation2_~kernel_st~1#1| 1) (= ~t~0 0) (<= 0 |ULTIMATE.start_eval2_~tmp~5#1|) (not (= ~token~0 (+ 3 ~local~0))) (<= ~t3_pc~0 1) (<= |ULTIMATE.start_eval2_~tmp~5#1| 1) (= ~p_dw_st~0 0) (= ~t2_i~0 1) (= ~q_write_ev~0 0) (= ~c_dr_pc~0 0) (= ~q_read_ev~0 0) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (= ~a_t~0 0) (<= 0 ~t3_pc~0) (= ~t3_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2021-11-23 02:53:36,309 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:53:36,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:53:36,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 12] total 36 [2021-11-23 02:53:36,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379343171] [2021-11-23 02:53:36,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:53:36,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-23 02:53:36,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:53:36,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-23 02:53:36,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=7921, Unknown=0, NotChecked=0, Total=8556 [2021-11-23 02:53:36,315 INFO L87 Difference]: Start difference. First operand 7776 states and 9425 transitions. Second operand has 36 states, 24 states have (on average 8.416666666666666) internal successors, (202), 27 states have internal predecessors, (202), 14 states have call successors, (40), 11 states have call predecessors, (40), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) [2021-11-23 02:53:43,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:53:43,616 INFO L93 Difference]: Finished difference Result 18967 states and 23410 transitions. [2021-11-23 02:53:43,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-23 02:53:43,616 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 24 states have (on average 8.416666666666666) internal successors, (202), 27 states have internal predecessors, (202), 14 states have call successors, (40), 11 states have call predecessors, (40), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) Word has length 127 [2021-11-23 02:53:43,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:53:43,643 INFO L225 Difference]: With dead ends: 18967 [2021-11-23 02:53:43,643 INFO L226 Difference]: Without dead ends: 12330 [2021-11-23 02:53:43,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 313 SyntacticMatches, 16 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10006 ImplicationChecksByTransitivity, 36.0s TimeCoverageRelationStatistics Valid=2407, Invalid=21773, Unknown=0, NotChecked=0, Total=24180 [2021-11-23 02:53:43,658 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 5258 mSDsluCounter, 1362 mSDsCounter, 0 mSdLazyCounter, 4047 mSolverCounterSat, 2738 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5258 SdHoareTripleChecker+Valid, 1277 SdHoareTripleChecker+Invalid, 6785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2738 IncrementalHoareTripleChecker+Valid, 4047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:53:43,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5258 Valid, 1277 Invalid, 6785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2738 Valid, 4047 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-23 02:53:43,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12330 states. [2021-11-23 02:53:44,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12330 to 7012. [2021-11-23 02:53:44,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7012 states, 5761 states have (on average 1.204478389168547) internal successors, (6939), 5810 states have internal predecessors, (6939), 646 states have call successors, (646), 607 states have call predecessors, (646), 604 states have return successors, (822), 594 states have call predecessors, (822), 646 states have call successors, (822) [2021-11-23 02:53:44,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7012 states to 7012 states and 8407 transitions. [2021-11-23 02:53:44,306 INFO L78 Accepts]: Start accepts. Automaton has 7012 states and 8407 transitions. Word has length 127 [2021-11-23 02:53:44,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:53:44,307 INFO L470 AbstractCegarLoop]: Abstraction has 7012 states and 8407 transitions. [2021-11-23 02:53:44,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 24 states have (on average 8.416666666666666) internal successors, (202), 27 states have internal predecessors, (202), 14 states have call successors, (40), 11 states have call predecessors, (40), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) [2021-11-23 02:53:44,307 INFO L276 IsEmpty]: Start isEmpty. Operand 7012 states and 8407 transitions. [2021-11-23 02:53:44,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-23 02:53:44,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:53:44,309 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:53:44,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-23 02:53:44,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-23 02:53:44,510 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:53:44,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:53:44,511 INFO L85 PathProgramCache]: Analyzing trace with hash -661480290, now seen corresponding path program 1 times [2021-11-23 02:53:44,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:53:44,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244504427] [2021-11-23 02:53:44,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:53:44,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:53:44,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:53:44,587 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-23 02:53:44,588 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:53:44,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244504427] [2021-11-23 02:53:44,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244504427] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:53:44,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23082975] [2021-11-23 02:53:44,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:53:44,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:53:44,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:53:44,590 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:53:44,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-23 02:53:44,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:53:44,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:53:44,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:53:44,964 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-23 02:53:44,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:53:44,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23082975] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:53:44,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:53:44,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2021-11-23 02:53:44,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143331685] [2021-11-23 02:53:44,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:53:44,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:53:44,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:53:44,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:53:44,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:53:44,966 INFO L87 Difference]: Start difference. First operand 7012 states and 8407 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:53:45,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:53:45,546 INFO L93 Difference]: Finished difference Result 13857 states and 17018 transitions. [2021-11-23 02:53:45,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:53:45,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 141 [2021-11-23 02:53:45,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:53:45,558 INFO L225 Difference]: With dead ends: 13857 [2021-11-23 02:53:45,559 INFO L226 Difference]: Without dead ends: 7414 [2021-11-23 02:53:45,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:53:45,568 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 78 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:53:45,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 149 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:53:45,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7414 states. [2021-11-23 02:53:46,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7414 to 7210. [2021-11-23 02:53:46,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7210 states, 5947 states have (on average 1.1802589540945014) internal successors, (7019), 5996 states have internal predecessors, (7019), 646 states have call successors, (646), 619 states have call predecessors, (646), 616 states have return successors, (843), 594 states have call predecessors, (843), 646 states have call successors, (843) [2021-11-23 02:53:46,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7210 states to 7210 states and 8508 transitions. [2021-11-23 02:53:46,169 INFO L78 Accepts]: Start accepts. Automaton has 7210 states and 8508 transitions. Word has length 141 [2021-11-23 02:53:46,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:53:46,169 INFO L470 AbstractCegarLoop]: Abstraction has 7210 states and 8508 transitions. [2021-11-23 02:53:46,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:53:46,169 INFO L276 IsEmpty]: Start isEmpty. Operand 7210 states and 8508 transitions. [2021-11-23 02:53:46,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-23 02:53:46,172 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:53:46,172 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:53:46,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-23 02:53:46,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:53:46,373 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:53:46,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:53:46,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1009192040, now seen corresponding path program 1 times [2021-11-23 02:53:46,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:53:46,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129815218] [2021-11-23 02:53:46,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:53:46,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:53:46,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:53:46,444 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 43 proven. 36 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-23 02:53:46,444 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:53:46,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129815218] [2021-11-23 02:53:46,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129815218] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:53:46,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028805853] [2021-11-23 02:53:46,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:53:46,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:53:46,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:53:46,446 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:53:46,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-23 02:53:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:53:46,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 02:53:46,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:53:46,808 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 02:53:46,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:53:46,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028805853] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:53:46,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:53:46,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2021-11-23 02:53:46,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348419236] [2021-11-23 02:53:46,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:53:46,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:53:46,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:53:46,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:53:46,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:53:46,811 INFO L87 Difference]: Start difference. First operand 7210 states and 8508 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-23 02:53:47,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:53:47,638 INFO L93 Difference]: Finished difference Result 14741 states and 17338 transitions. [2021-11-23 02:53:47,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:53:47,639 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 144 [2021-11-23 02:53:47,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:53:47,655 INFO L225 Difference]: With dead ends: 14741 [2021-11-23 02:53:47,655 INFO L226 Difference]: Without dead ends: 8123 [2021-11-23 02:53:47,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:53:47,665 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 209 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:53:47,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 400 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:53:47,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8123 states. [2021-11-23 02:53:48,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8123 to 7120. [2021-11-23 02:53:48,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7120 states, 5789 states have (on average 1.1552945240974262) internal successors, (6688), 5813 states have internal predecessors, (6688), 698 states have call successors, (698), 644 states have call predecessors, (698), 632 states have return successors, (866), 662 states have call predecessors, (866), 698 states have call successors, (866) [2021-11-23 02:53:48,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7120 states to 7120 states and 8252 transitions. [2021-11-23 02:53:48,250 INFO L78 Accepts]: Start accepts. Automaton has 7120 states and 8252 transitions. Word has length 144 [2021-11-23 02:53:48,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:53:48,250 INFO L470 AbstractCegarLoop]: Abstraction has 7120 states and 8252 transitions. [2021-11-23 02:53:48,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-23 02:53:48,251 INFO L276 IsEmpty]: Start isEmpty. Operand 7120 states and 8252 transitions. [2021-11-23 02:53:48,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-23 02:53:48,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:53:48,256 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:53:48,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-23 02:53:48,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-23 02:53:48,471 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:53:48,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:53:48,471 INFO L85 PathProgramCache]: Analyzing trace with hash -2141812975, now seen corresponding path program 1 times [2021-11-23 02:53:48,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:53:48,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695320969] [2021-11-23 02:53:48,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:53:48,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:53:48,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:53:48,591 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-11-23 02:53:48,591 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:53:48,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695320969] [2021-11-23 02:53:48,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695320969] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:53:48,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:53:48,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:53:48,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789741041] [2021-11-23 02:53:48,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:53:48,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:53:48,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:53:48,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:53:48,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:53:48,593 INFO L87 Difference]: Start difference. First operand 7120 states and 8252 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-23 02:53:50,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:53:50,569 INFO L93 Difference]: Finished difference Result 23994 states and 27907 transitions. [2021-11-23 02:53:50,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:53:50,570 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 173 [2021-11-23 02:53:50,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:53:50,603 INFO L225 Difference]: With dead ends: 23994 [2021-11-23 02:53:50,603 INFO L226 Difference]: Without dead ends: 19115 [2021-11-23 02:53:50,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:53:50,613 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 358 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:53:50,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 1080 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:53:50,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19115 states. [2021-11-23 02:53:51,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19115 to 12701. [2021-11-23 02:53:51,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12701 states, 10256 states have (on average 1.156786271450858) internal successors, (11864), 10291 states have internal predecessors, (11864), 1290 states have call successors, (1290), 1158 states have call predecessors, (1290), 1154 states have return successors, (1594), 1251 states have call predecessors, (1594), 1290 states have call successors, (1594) [2021-11-23 02:53:51,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12701 states to 12701 states and 14748 transitions. [2021-11-23 02:53:51,746 INFO L78 Accepts]: Start accepts. Automaton has 12701 states and 14748 transitions. Word has length 173 [2021-11-23 02:53:51,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:53:51,746 INFO L470 AbstractCegarLoop]: Abstraction has 12701 states and 14748 transitions. [2021-11-23 02:53:51,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-23 02:53:51,746 INFO L276 IsEmpty]: Start isEmpty. Operand 12701 states and 14748 transitions. [2021-11-23 02:53:51,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-23 02:53:51,755 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:53:51,756 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:53:51,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-23 02:53:51,756 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:53:51,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:53:51,757 INFO L85 PathProgramCache]: Analyzing trace with hash -801280807, now seen corresponding path program 1 times [2021-11-23 02:53:51,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:53:51,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115262325] [2021-11-23 02:53:51,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:53:51,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:53:51,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:53:52,075 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 40 proven. 75 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-23 02:53:52,075 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:53:52,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115262325] [2021-11-23 02:53:52,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115262325] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:53:52,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395771564] [2021-11-23 02:53:52,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:53:52,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:53:52,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:53:52,077 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:53:52,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36ed8938-c592-4426-a10e-4b2f30b92568/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-23 02:53:52,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:53:52,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 02:53:52,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:53:52,602 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-23 02:53:52,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:53:53,317 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 49 proven. 18 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-11-23 02:53:53,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395771564] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:53:53,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1842260711] [2021-11-23 02:53:53,320 INFO L159 IcfgInterpreter]: Started Sifa with 83 locations of interest [2021-11-23 02:53:53,321 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:53:53,321 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:53:53,322 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:53:53,322 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs