./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product30.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh --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 b3416b3e017f399176a4f7a837e050107ced7390b025fd07360efb8b6075a94d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 07:14:15,772 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:14:15,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:14:15,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:14:15,792 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:14:15,793 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:14:15,794 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:14:15,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:14:15,796 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:14:15,797 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:14:15,798 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:14:15,799 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:14:15,800 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:14:15,801 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:14:15,802 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:14:15,803 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:14:15,803 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:14:15,804 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:14:15,806 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:14:15,807 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:14:15,809 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:14:15,810 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:14:15,811 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:14:15,812 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:14:15,815 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:14:15,815 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:14:15,816 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:14:15,816 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:14:15,817 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:14:15,818 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:14:15,818 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:14:15,819 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:14:15,819 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:14:15,820 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:14:15,821 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:14:15,821 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:14:15,821 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:14:15,822 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:14:15,822 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:14:15,823 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:14:15,823 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:14:15,824 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 07:14:15,843 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:14:15,844 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:14:15,844 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:14:15,844 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:14:15,845 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:14:15,845 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:14:15,845 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:14:15,845 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:14:15,845 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:14:15,845 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:14:15,846 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:14:15,846 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:14:15,846 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:14:15,846 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:14:15,846 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:14:15,846 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:14:15,847 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:14:15,847 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:14:15,847 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:14:15,848 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:14:15,848 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:14:15,848 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:14:15,848 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:14:15,848 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 07:14:15,848 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:14:15,849 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 07:14:15,849 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:14:15,849 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 07:14:15,849 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:14:15,849 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 07:14:15,849 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:14:15,850 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:14:15,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:14:15,850 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:14:15,850 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:14:15,850 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:14:15,850 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 07:14:15,851 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:14:15,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:14:15,851 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 07:14:15,851 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:14:15,851 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3416b3e017f399176a4f7a837e050107ced7390b025fd07360efb8b6075a94d [2022-12-14 07:14:16,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:14:16,075 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:14:16,077 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:14:16,078 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:14:16,079 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:14:16,080 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec2_product30.cil.c [2022-12-14 07:14:18,637 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:14:18,877 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:14:18,877 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/sv-benchmarks/c/product-lines/elevator_spec2_product30.cil.c [2022-12-14 07:14:18,892 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh/data/f08b79d9c/a46b809ab2514280a6739efc61635374/FLAGab6e7c10c [2022-12-14 07:14:18,905 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh/data/f08b79d9c/a46b809ab2514280a6739efc61635374 [2022-12-14 07:14:18,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:14:18,908 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:14:18,909 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:14:18,910 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:14:18,913 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:14:18,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:14:18" (1/1) ... [2022-12-14 07:14:18,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fe1afe8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:14:18, skipping insertion in model container [2022-12-14 07:14:18,914 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:14:18" (1/1) ... [2022-12-14 07:14:18,921 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:14:18,970 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:14:19,208 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/sv-benchmarks/c/product-lines/elevator_spec2_product30.cil.c[10611,10624] [2022-12-14 07:14:19,385 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:14:19,397 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:14:19,420 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/sv-benchmarks/c/product-lines/elevator_spec2_product30.cil.c[10611,10624] [2022-12-14 07:14:19,476 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:14:19,499 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:14:19,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:14:19 WrapperNode [2022-12-14 07:14:19,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:14:19,500 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:14:19,500 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:14:19,500 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:14:19,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:14:19" (1/1) ... [2022-12-14 07:14:19,530 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:14:19" (1/1) ... [2022-12-14 07:14:19,577 INFO L138 Inliner]: procedures = 95, calls = 347, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 920 [2022-12-14 07:14:19,578 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:14:19,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:14:19,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:14:19,579 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:14:19,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:14:19" (1/1) ... [2022-12-14 07:14:19,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:14:19" (1/1) ... [2022-12-14 07:14:19,590 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:14:19" (1/1) ... [2022-12-14 07:14:19,590 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:14:19" (1/1) ... [2022-12-14 07:14:19,601 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:14:19" (1/1) ... [2022-12-14 07:14:19,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:14:19" (1/1) ... [2022-12-14 07:14:19,612 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:14:19" (1/1) ... [2022-12-14 07:14:19,615 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:14:19" (1/1) ... [2022-12-14 07:14:19,620 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:14:19,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:14:19,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:14:19,620 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:14:19,621 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:14:19" (1/1) ... [2022-12-14 07:14:19,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:14:19,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:14:19,645 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:14:19,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:14:19,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:14:19,677 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-12-14 07:14:19,678 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-12-14 07:14:19,678 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-12-14 07:14:19,678 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-12-14 07:14:19,678 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 07:14:19,678 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 07:14:19,678 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 07:14:19,678 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 07:14:19,678 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 07:14:19,678 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 07:14:19,678 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-12-14 07:14:19,678 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-12-14 07:14:19,678 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 07:14:19,678 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 07:14:19,678 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 07:14:19,678 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 07:14:19,679 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-12-14 07:14:19,679 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-12-14 07:14:19,679 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 07:14:19,679 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 07:14:19,679 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 07:14:19,679 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 07:14:19,679 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 07:14:19,679 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 07:14:19,679 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 07:14:19,679 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 07:14:19,679 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-12-14 07:14:19,679 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-12-14 07:14:19,679 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 07:14:19,679 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 07:14:19,679 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 07:14:19,680 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 07:14:19,680 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 07:14:19,680 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 07:14:19,680 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 07:14:19,680 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 07:14:19,680 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 07:14:19,680 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 07:14:19,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 07:14:19,680 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-12-14 07:14:19,680 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-12-14 07:14:19,680 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 07:14:19,680 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 07:14:19,680 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 07:14:19,680 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 07:14:19,680 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 07:14:19,681 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 07:14:19,681 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2022-12-14 07:14:19,681 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2022-12-14 07:14:19,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:14:19,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:14:19,681 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 07:14:19,681 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 07:14:19,796 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:14:19,798 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:14:20,595 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:14:21,174 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:14:21,174 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 07:14:21,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:14:21 BoogieIcfgContainer [2022-12-14 07:14:21,177 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:14:21,178 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:14:21,178 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:14:21,181 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:14:21,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:14:18" (1/3) ... [2022-12-14 07:14:21,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f603d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:14:21, skipping insertion in model container [2022-12-14 07:14:21,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:14:19" (2/3) ... [2022-12-14 07:14:21,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f603d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:14:21, skipping insertion in model container [2022-12-14 07:14:21,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:14:21" (3/3) ... [2022-12-14 07:14:21,183 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product30.cil.c [2022-12-14 07:14:21,198 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:14:21,198 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 07:14:21,238 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:14:21,243 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7bd0b68e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:14:21,243 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 07:14:21,248 INFO L276 IsEmpty]: Start isEmpty. Operand has 383 states, 258 states have (on average 1.5930232558139534) internal successors, (411), 281 states have internal predecessors, (411), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 91 states have call predecessors, (98), 98 states have call successors, (98) [2022-12-14 07:14:21,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 07:14:21,257 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:14:21,257 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:14:21,258 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:14:21,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:14:21,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1060744439, now seen corresponding path program 1 times [2022-12-14 07:14:21,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:14:21,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962094409] [2022-12-14 07:14:21,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:14:21,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:14:21,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:14:21,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:14:21,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:14:21,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962094409] [2022-12-14 07:14:21,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962094409] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:14:21,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:14:21,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:14:21,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77252013] [2022-12-14 07:14:21,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:14:21,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 07:14:21,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:14:21,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 07:14:21,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 07:14:21,566 INFO L87 Difference]: Start difference. First operand has 383 states, 258 states have (on average 1.5930232558139534) internal successors, (411), 281 states have internal predecessors, (411), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 91 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 07:14:21,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:14:21,701 INFO L93 Difference]: Finished difference Result 401 states and 634 transitions. [2022-12-14 07:14:21,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 07:14:21,703 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2022-12-14 07:14:21,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:14:21,718 INFO L225 Difference]: With dead ends: 401 [2022-12-14 07:14:21,718 INFO L226 Difference]: Without dead ends: 379 [2022-12-14 07:14:21,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 07:14:21,725 INFO L413 NwaCegarLoop]: 563 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:14:21,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 563 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:14:21,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-12-14 07:14:21,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2022-12-14 07:14:21,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 256 states have (on average 1.58203125) internal successors, (405), 277 states have internal predecessors, (405), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 90 states have call predecessors, (93), 93 states have call successors, (93) [2022-12-14 07:14:21,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 596 transitions. [2022-12-14 07:14:21,791 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 596 transitions. Word has length 43 [2022-12-14 07:14:21,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:14:21,792 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 596 transitions. [2022-12-14 07:14:21,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 07:14:21,792 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 596 transitions. [2022-12-14 07:14:21,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 07:14:21,796 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:14:21,796 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:14:21,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 07:14:21,796 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:14:21,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:14:21,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1951742358, now seen corresponding path program 1 times [2022-12-14 07:14:21,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:14:21,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433883634] [2022-12-14 07:14:21,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:14:21,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:14:21,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:14:22,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:14:22,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:14:22,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433883634] [2022-12-14 07:14:22,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433883634] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:14:22,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:14:22,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 07:14:22,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978243796] [2022-12-14 07:14:22,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:14:22,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:14:22,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:14:22,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:14:22,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:14:22,199 INFO L87 Difference]: Start difference. First operand 379 states and 596 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-14 07:14:23,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:14:23,785 INFO L93 Difference]: Finished difference Result 1243 states and 1996 transitions. [2022-12-14 07:14:23,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 07:14:23,785 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 44 [2022-12-14 07:14:23,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:14:23,791 INFO L225 Difference]: With dead ends: 1243 [2022-12-14 07:14:23,791 INFO L226 Difference]: Without dead ends: 880 [2022-12-14 07:14:23,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-12-14 07:14:23,796 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 1230 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 1640 mSolverCounterSat, 443 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1297 SdHoareTripleChecker+Valid, 1103 SdHoareTripleChecker+Invalid, 2083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 443 IncrementalHoareTripleChecker+Valid, 1640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:14:23,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1297 Valid, 1103 Invalid, 2083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [443 Valid, 1640 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 07:14:23,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-12-14 07:14:23,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 793. [2022-12-14 07:14:23,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 558 states have (on average 1.603942652329749) internal successors, (895), 588 states have internal predecessors, (895), 190 states have call successors, (190), 43 states have call predecessors, (190), 44 states have return successors, (192), 174 states have call predecessors, (192), 185 states have call successors, (192) [2022-12-14 07:14:23,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1277 transitions. [2022-12-14 07:14:23,843 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1277 transitions. Word has length 44 [2022-12-14 07:14:23,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:14:23,843 INFO L495 AbstractCegarLoop]: Abstraction has 793 states and 1277 transitions. [2022-12-14 07:14:23,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-14 07:14:23,844 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1277 transitions. [2022-12-14 07:14:23,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-14 07:14:23,851 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:14:23,851 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:14:23,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 07:14:23,851 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:14:23,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:14:23,851 INFO L85 PathProgramCache]: Analyzing trace with hash 732488286, now seen corresponding path program 1 times [2022-12-14 07:14:23,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:14:23,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581027959] [2022-12-14 07:14:23,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:14:23,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:14:23,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:14:24,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:14:24,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:14:24,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581027959] [2022-12-14 07:14:24,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581027959] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:14:24,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:14:24,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 07:14:24,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761234986] [2022-12-14 07:14:24,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:14:24,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:14:24,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:14:24,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:14:24,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:14:24,111 INFO L87 Difference]: Start difference. First operand 793 states and 1277 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 07:14:24,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:14:24,367 INFO L93 Difference]: Finished difference Result 1760 states and 2872 transitions. [2022-12-14 07:14:24,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:14:24,368 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 76 [2022-12-14 07:14:24,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:14:24,372 INFO L225 Difference]: With dead ends: 1760 [2022-12-14 07:14:24,372 INFO L226 Difference]: Without dead ends: 984 [2022-12-14 07:14:24,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:14:24,376 INFO L413 NwaCegarLoop]: 604 mSDtfsCounter, 177 mSDsluCounter, 1678 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 2282 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:14:24,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 2282 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:14:24,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-12-14 07:14:24,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 799. [2022-12-14 07:14:24,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 564 states have (on average 1.5975177304964538) internal successors, (901), 594 states have internal predecessors, (901), 190 states have call successors, (190), 43 states have call predecessors, (190), 44 states have return successors, (192), 174 states have call predecessors, (192), 185 states have call successors, (192) [2022-12-14 07:14:24,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1283 transitions. [2022-12-14 07:14:24,416 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1283 transitions. Word has length 76 [2022-12-14 07:14:24,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:14:24,417 INFO L495 AbstractCegarLoop]: Abstraction has 799 states and 1283 transitions. [2022-12-14 07:14:24,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 07:14:24,417 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1283 transitions. [2022-12-14 07:14:24,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 07:14:24,419 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:14:24,419 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:14:24,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 07:14:24,419 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:14:24,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:14:24,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1584859644, now seen corresponding path program 1 times [2022-12-14 07:14:24,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:14:24,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756940440] [2022-12-14 07:14:24,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:14:24,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:14:24,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:14:24,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:14:24,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:14:24,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756940440] [2022-12-14 07:14:24,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756940440] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:14:24,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:14:24,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 07:14:24,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323635229] [2022-12-14 07:14:24,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:14:24,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 07:14:24,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:14:24,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 07:14:24,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 07:14:24,647 INFO L87 Difference]: Start difference. First operand 799 states and 1283 transitions. Second operand has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-12-14 07:14:26,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:14:26,768 INFO L93 Difference]: Finished difference Result 2761 states and 4474 transitions. [2022-12-14 07:14:26,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 07:14:26,769 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 77 [2022-12-14 07:14:26,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:14:26,776 INFO L225 Difference]: With dead ends: 2761 [2022-12-14 07:14:26,776 INFO L226 Difference]: Without dead ends: 1978 [2022-12-14 07:14:26,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-12-14 07:14:26,781 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 1359 mSDsluCounter, 1609 mSDsCounter, 0 mSdLazyCounter, 4426 mSolverCounterSat, 683 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1434 SdHoareTripleChecker+Valid, 2160 SdHoareTripleChecker+Invalid, 5109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 683 IncrementalHoareTripleChecker+Valid, 4426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 07:14:26,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1434 Valid, 2160 Invalid, 5109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [683 Valid, 4426 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 07:14:26,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2022-12-14 07:14:26,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1791. [2022-12-14 07:14:26,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1229 states have (on average 1.5679414157851912) internal successors, (1927), 1301 states have internal predecessors, (1927), 471 states have call successors, (471), 78 states have call predecessors, (471), 90 states have return successors, (490), 444 states have call predecessors, (490), 466 states have call successors, (490) [2022-12-14 07:14:26,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 2888 transitions. [2022-12-14 07:14:26,880 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 2888 transitions. Word has length 77 [2022-12-14 07:14:26,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:14:26,880 INFO L495 AbstractCegarLoop]: Abstraction has 1791 states and 2888 transitions. [2022-12-14 07:14:26,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-12-14 07:14:26,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 2888 transitions. [2022-12-14 07:14:26,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-14 07:14:26,882 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:14:26,882 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:14:26,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 07:14:26,882 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:14:26,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:14:26,883 INFO L85 PathProgramCache]: Analyzing trace with hash 341478693, now seen corresponding path program 1 times [2022-12-14 07:14:26,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:14:26,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677823822] [2022-12-14 07:14:26,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:14:26,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:14:26,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:14:27,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:14:27,104 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:14:27,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677823822] [2022-12-14 07:14:27,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677823822] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:14:27,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:14:27,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-14 07:14:27,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994704836] [2022-12-14 07:14:27,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:14:27,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 07:14:27,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:14:27,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 07:14:27,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-14 07:14:27,106 INFO L87 Difference]: Start difference. First operand 1791 states and 2888 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 6 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-12-14 07:14:29,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:14:29,377 INFO L93 Difference]: Finished difference Result 5038 states and 8145 transitions. [2022-12-14 07:14:29,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 07:14:29,378 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 6 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 78 [2022-12-14 07:14:29,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:14:29,389 INFO L225 Difference]: With dead ends: 5038 [2022-12-14 07:14:29,390 INFO L226 Difference]: Without dead ends: 3265 [2022-12-14 07:14:29,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-12-14 07:14:29,397 INFO L413 NwaCegarLoop]: 409 mSDtfsCounter, 1745 mSDsluCounter, 2196 mSDsCounter, 0 mSdLazyCounter, 3974 mSolverCounterSat, 595 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1811 SdHoareTripleChecker+Valid, 2605 SdHoareTripleChecker+Invalid, 4569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 595 IncrementalHoareTripleChecker+Valid, 3974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 07:14:29,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1811 Valid, 2605 Invalid, 4569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [595 Valid, 3974 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 07:14:29,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3265 states. [2022-12-14 07:14:29,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3265 to 3103. [2022-12-14 07:14:29,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3103 states, 2203 states have (on average 1.5905583295506127) internal successors, (3504), 2294 states have internal predecessors, (3504), 729 states have call successors, (729), 140 states have call predecessors, (729), 170 states have return successors, (792), 712 states have call predecessors, (792), 724 states have call successors, (792) [2022-12-14 07:14:29,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3103 states to 3103 states and 5025 transitions. [2022-12-14 07:14:29,582 INFO L78 Accepts]: Start accepts. Automaton has 3103 states and 5025 transitions. Word has length 78 [2022-12-14 07:14:29,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:14:29,583 INFO L495 AbstractCegarLoop]: Abstraction has 3103 states and 5025 transitions. [2022-12-14 07:14:29,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 6 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-12-14 07:14:29,583 INFO L276 IsEmpty]: Start isEmpty. Operand 3103 states and 5025 transitions. [2022-12-14 07:14:29,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-14 07:14:29,585 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:14:29,585 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:14:29,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 07:14:29,585 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:14:29,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:14:29,585 INFO L85 PathProgramCache]: Analyzing trace with hash -443288473, now seen corresponding path program 1 times [2022-12-14 07:14:29,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:14:29,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92050526] [2022-12-14 07:14:29,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:14:29,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:14:29,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:14:29,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:14:29,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:14:29,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92050526] [2022-12-14 07:14:29,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92050526] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:14:29,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:14:29,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 07:14:29,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390821687] [2022-12-14 07:14:29,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:14:29,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:14:29,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:14:29,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:14:29,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:14:29,755 INFO L87 Difference]: Start difference. First operand 3103 states and 5025 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 07:14:29,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:14:29,992 INFO L93 Difference]: Finished difference Result 5542 states and 8993 transitions. [2022-12-14 07:14:29,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:14:29,992 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 83 [2022-12-14 07:14:29,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:14:30,003 INFO L225 Difference]: With dead ends: 5542 [2022-12-14 07:14:30,003 INFO L226 Difference]: Without dead ends: 3215 [2022-12-14 07:14:30,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:14:30,011 INFO L413 NwaCegarLoop]: 565 mSDtfsCounter, 6 mSDsluCounter, 2780 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3345 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:14:30,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3345 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:14:30,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3215 states. [2022-12-14 07:14:30,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3215 to 3173. [2022-12-14 07:14:30,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3173 states, 2253 states have (on average 1.5774522858411009) internal successors, (3554), 2344 states have internal predecessors, (3554), 729 states have call successors, (729), 140 states have call predecessors, (729), 190 states have return successors, (842), 732 states have call predecessors, (842), 724 states have call successors, (842) [2022-12-14 07:14:30,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3173 states to 3173 states and 5125 transitions. [2022-12-14 07:14:30,153 INFO L78 Accepts]: Start accepts. Automaton has 3173 states and 5125 transitions. Word has length 83 [2022-12-14 07:14:30,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:14:30,154 INFO L495 AbstractCegarLoop]: Abstraction has 3173 states and 5125 transitions. [2022-12-14 07:14:30,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 07:14:30,154 INFO L276 IsEmpty]: Start isEmpty. Operand 3173 states and 5125 transitions. [2022-12-14 07:14:30,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-14 07:14:30,157 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:14:30,157 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:14:30,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 07:14:30,157 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:14:30,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:14:30,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1920656379, now seen corresponding path program 1 times [2022-12-14 07:14:30,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:14:30,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292934363] [2022-12-14 07:14:30,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:14:30,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:14:30,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:14:30,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:14:30,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:14:30,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292934363] [2022-12-14 07:14:30,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292934363] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:14:30,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:14:30,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 07:14:30,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569176634] [2022-12-14 07:14:30,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:14:30,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:14:30,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:14:30,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:14:30,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:14:30,350 INFO L87 Difference]: Start difference. First operand 3173 states and 5125 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 07:14:30,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:14:30,594 INFO L93 Difference]: Finished difference Result 5648 states and 9133 transitions. [2022-12-14 07:14:30,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:14:30,595 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 82 [2022-12-14 07:14:30,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:14:30,605 INFO L225 Difference]: With dead ends: 5648 [2022-12-14 07:14:30,605 INFO L226 Difference]: Without dead ends: 3265 [2022-12-14 07:14:30,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:14:30,612 INFO L413 NwaCegarLoop]: 566 mSDtfsCounter, 6 mSDsluCounter, 2784 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3350 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:14:30,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 3350 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:14:30,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3265 states. [2022-12-14 07:14:30,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3265 to 3183. [2022-12-14 07:14:30,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3183 states, 2263 states have (on average 1.5749005744586833) internal successors, (3564), 2344 states have internal predecessors, (3564), 729 states have call successors, (729), 140 states have call predecessors, (729), 190 states have return successors, (842), 742 states have call predecessors, (842), 724 states have call successors, (842) [2022-12-14 07:14:30,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3183 states to 3183 states and 5135 transitions. [2022-12-14 07:14:30,745 INFO L78 Accepts]: Start accepts. Automaton has 3183 states and 5135 transitions. Word has length 82 [2022-12-14 07:14:30,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:14:30,746 INFO L495 AbstractCegarLoop]: Abstraction has 3183 states and 5135 transitions. [2022-12-14 07:14:30,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 07:14:30,746 INFO L276 IsEmpty]: Start isEmpty. Operand 3183 states and 5135 transitions. [2022-12-14 07:14:30,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-14 07:14:30,748 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:14:30,748 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:14:30,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 07:14:30,748 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:14:30,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:14:30,748 INFO L85 PathProgramCache]: Analyzing trace with hash -324875705, now seen corresponding path program 1 times [2022-12-14 07:14:30,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:14:30,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029863955] [2022-12-14 07:14:30,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:14:30,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:14:30,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:14:30,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:14:30,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:14:30,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029863955] [2022-12-14 07:14:30,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029863955] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:14:30,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:14:30,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 07:14:30,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927336327] [2022-12-14 07:14:30,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:14:30,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:14:30,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:14:30,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:14:30,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:14:30,898 INFO L87 Difference]: Start difference. First operand 3183 states and 5135 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 07:14:31,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:14:31,139 INFO L93 Difference]: Finished difference Result 5666 states and 9151 transitions. [2022-12-14 07:14:31,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:14:31,140 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 83 [2022-12-14 07:14:31,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:14:31,158 INFO L225 Difference]: With dead ends: 5666 [2022-12-14 07:14:31,158 INFO L226 Difference]: Without dead ends: 3275 [2022-12-14 07:14:31,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:14:31,169 INFO L413 NwaCegarLoop]: 566 mSDtfsCounter, 6 mSDsluCounter, 2784 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3350 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:14:31,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 3350 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:14:31,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3275 states. [2022-12-14 07:14:31,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3275 to 3193. [2022-12-14 07:14:31,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3193 states, 2273 states have (on average 1.572371315442147) internal successors, (3574), 2344 states have internal predecessors, (3574), 729 states have call successors, (729), 140 states have call predecessors, (729), 190 states have return successors, (842), 752 states have call predecessors, (842), 724 states have call successors, (842) [2022-12-14 07:14:31,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3193 states to 3193 states and 5145 transitions. [2022-12-14 07:14:31,324 INFO L78 Accepts]: Start accepts. Automaton has 3193 states and 5145 transitions. Word has length 83 [2022-12-14 07:14:31,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:14:31,324 INFO L495 AbstractCegarLoop]: Abstraction has 3193 states and 5145 transitions. [2022-12-14 07:14:31,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 07:14:31,324 INFO L276 IsEmpty]: Start isEmpty. Operand 3193 states and 5145 transitions. [2022-12-14 07:14:31,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-12-14 07:14:31,326 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:14:31,326 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:14:31,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 07:14:31,327 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:14:31,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:14:31,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1940793299, now seen corresponding path program 1 times [2022-12-14 07:14:31,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:14:31,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563000974] [2022-12-14 07:14:31,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:14:31,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:14:31,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:14:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:14:31,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:14:31,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563000974] [2022-12-14 07:14:31,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563000974] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:14:31,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:14:31,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 07:14:31,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255645967] [2022-12-14 07:14:31,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:14:31,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 07:14:31,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:14:31,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 07:14:31,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-14 07:14:31,563 INFO L87 Difference]: Start difference. First operand 3193 states and 5145 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 7 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 8 states have call predecessors, (14), 6 states have call successors, (14) [2022-12-14 07:14:33,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:14:33,393 INFO L93 Difference]: Finished difference Result 7977 states and 12939 transitions. [2022-12-14 07:14:33,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 07:14:33,393 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 7 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 8 states have call predecessors, (14), 6 states have call successors, (14) Word has length 86 [2022-12-14 07:14:33,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:14:33,409 INFO L225 Difference]: With dead ends: 7977 [2022-12-14 07:14:33,409 INFO L226 Difference]: Without dead ends: 5336 [2022-12-14 07:14:33,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-12-14 07:14:33,424 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 3312 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 2266 mSolverCounterSat, 1516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3478 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 3782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1516 IncrementalHoareTripleChecker+Valid, 2266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:14:33,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3478 Valid, 1248 Invalid, 3782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1516 Valid, 2266 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 07:14:33,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5336 states. [2022-12-14 07:14:33,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5336 to 5197. [2022-12-14 07:14:33,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5197 states, 3624 states have (on average 1.5339403973509933) internal successors, (5559), 3765 states have internal predecessors, (5559), 1243 states have call successors, (1243), 249 states have call predecessors, (1243), 329 states have return successors, (1463), 1259 states have call predecessors, (1463), 1238 states have call successors, (1463) [2022-12-14 07:14:33,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5197 states to 5197 states and 8265 transitions. [2022-12-14 07:14:33,731 INFO L78 Accepts]: Start accepts. Automaton has 5197 states and 8265 transitions. Word has length 86 [2022-12-14 07:14:33,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:14:33,731 INFO L495 AbstractCegarLoop]: Abstraction has 5197 states and 8265 transitions. [2022-12-14 07:14:33,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 7 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 8 states have call predecessors, (14), 6 states have call successors, (14) [2022-12-14 07:14:33,731 INFO L276 IsEmpty]: Start isEmpty. Operand 5197 states and 8265 transitions. [2022-12-14 07:14:33,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-12-14 07:14:33,733 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:14:33,733 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:14:33,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 07:14:33,733 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:14:33,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:14:33,734 INFO L85 PathProgramCache]: Analyzing trace with hash 783215792, now seen corresponding path program 1 times [2022-12-14 07:14:33,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:14:33,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140267741] [2022-12-14 07:14:33,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:14:33,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:14:33,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:14:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:14:33,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:14:33,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140267741] [2022-12-14 07:14:33,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140267741] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:14:33,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:14:33,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 07:14:33,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92359239] [2022-12-14 07:14:33,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:14:33,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:14:33,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:14:33,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:14:33,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:14:33,881 INFO L87 Difference]: Start difference. First operand 5197 states and 8265 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2022-12-14 07:14:36,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:14:36,304 INFO L93 Difference]: Finished difference Result 17050 states and 27852 transitions. [2022-12-14 07:14:36,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 07:14:36,305 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) Word has length 90 [2022-12-14 07:14:36,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:14:36,342 INFO L225 Difference]: With dead ends: 17050 [2022-12-14 07:14:36,342 INFO L226 Difference]: Without dead ends: 11871 [2022-12-14 07:14:36,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-12-14 07:14:36,358 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 2232 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 2944 mSolverCounterSat, 961 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2345 SdHoareTripleChecker+Valid, 1742 SdHoareTripleChecker+Invalid, 3905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 961 IncrementalHoareTripleChecker+Valid, 2944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 07:14:36,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2345 Valid, 1742 Invalid, 3905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [961 Valid, 2944 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 07:14:36,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11871 states. [2022-12-14 07:14:36,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11871 to 10980. [2022-12-14 07:14:36,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10980 states, 7504 states have (on average 1.5257196162046909) internal successors, (11449), 7907 states have internal predecessors, (11449), 2803 states have call successors, (2803), 507 states have call predecessors, (2803), 672 states have return successors, (3465), 2796 states have call predecessors, (3465), 2798 states have call successors, (3465) [2022-12-14 07:14:37,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10980 states to 10980 states and 17717 transitions. [2022-12-14 07:14:37,020 INFO L78 Accepts]: Start accepts. Automaton has 10980 states and 17717 transitions. Word has length 90 [2022-12-14 07:14:37,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:14:37,020 INFO L495 AbstractCegarLoop]: Abstraction has 10980 states and 17717 transitions. [2022-12-14 07:14:37,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2022-12-14 07:14:37,021 INFO L276 IsEmpty]: Start isEmpty. Operand 10980 states and 17717 transitions. [2022-12-14 07:14:37,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-14 07:14:37,024 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:14:37,025 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:14:37,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 07:14:37,025 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:14:37,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:14:37,025 INFO L85 PathProgramCache]: Analyzing trace with hash 926937040, now seen corresponding path program 1 times [2022-12-14 07:14:37,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:14:37,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610887141] [2022-12-14 07:14:37,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:14:37,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:14:37,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:14:37,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:14:37,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:14:37,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610887141] [2022-12-14 07:14:37,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610887141] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:14:37,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:14:37,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 07:14:37,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895676769] [2022-12-14 07:14:37,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:14:37,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:14:37,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:14:37,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:14:37,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:14:37,198 INFO L87 Difference]: Start difference. First operand 10980 states and 17717 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-12-14 07:14:39,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:14:39,040 INFO L93 Difference]: Finished difference Result 21673 states and 35133 transitions. [2022-12-14 07:14:39,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 07:14:39,041 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 92 [2022-12-14 07:14:39,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:14:39,077 INFO L225 Difference]: With dead ends: 21673 [2022-12-14 07:14:39,077 INFO L226 Difference]: Without dead ends: 12192 [2022-12-14 07:14:39,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-14 07:14:39,100 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 1003 mSDsluCounter, 1283 mSDsCounter, 0 mSdLazyCounter, 2509 mSolverCounterSat, 403 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1079 SdHoareTripleChecker+Valid, 1675 SdHoareTripleChecker+Invalid, 2912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 2509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:14:39,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1079 Valid, 1675 Invalid, 2912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [403 Valid, 2509 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 07:14:39,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12192 states. [2022-12-14 07:14:39,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12192 to 11214. [2022-12-14 07:14:39,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11214 states, 7666 states have (on average 1.5219149491260109) internal successors, (11667), 8097 states have internal predecessors, (11667), 2817 states have call successors, (2817), 539 states have call predecessors, (2817), 730 states have return successors, (3553), 2808 states have call predecessors, (3553), 2812 states have call successors, (3553) [2022-12-14 07:14:39,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11214 states to 11214 states and 18037 transitions. [2022-12-14 07:14:39,803 INFO L78 Accepts]: Start accepts. Automaton has 11214 states and 18037 transitions. Word has length 92 [2022-12-14 07:14:39,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:14:39,804 INFO L495 AbstractCegarLoop]: Abstraction has 11214 states and 18037 transitions. [2022-12-14 07:14:39,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-12-14 07:14:39,804 INFO L276 IsEmpty]: Start isEmpty. Operand 11214 states and 18037 transitions. [2022-12-14 07:14:39,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-12-14 07:14:39,808 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:14:39,808 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:14:39,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 07:14:39,808 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:14:39,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:14:39,809 INFO L85 PathProgramCache]: Analyzing trace with hash 33442461, now seen corresponding path program 1 times [2022-12-14 07:14:39,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:14:39,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909509367] [2022-12-14 07:14:39,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:14:39,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:14:39,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:14:39,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:14:39,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:14:39,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909509367] [2022-12-14 07:14:39,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909509367] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:14:39,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:14:39,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 07:14:39,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323829943] [2022-12-14 07:14:39,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:14:39,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:14:39,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:14:39,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:14:39,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:14:39,984 INFO L87 Difference]: Start difference. First operand 11214 states and 18037 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 07:14:40,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:14:40,743 INFO L93 Difference]: Finished difference Result 11340 states and 18246 transitions. [2022-12-14 07:14:40,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:14:40,743 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 95 [2022-12-14 07:14:40,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:14:40,775 INFO L225 Difference]: With dead ends: 11340 [2022-12-14 07:14:40,775 INFO L226 Difference]: Without dead ends: 11325 [2022-12-14 07:14:40,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-14 07:14:40,781 INFO L413 NwaCegarLoop]: 559 mSDtfsCounter, 689 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 1483 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:14:40,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [690 Valid, 1483 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:14:40,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11325 states. [2022-12-14 07:14:41,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11325 to 11222. [2022-12-14 07:14:41,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11222 states, 7674 states have (on average 1.5213708626531144) internal successors, (11675), 8105 states have internal predecessors, (11675), 2817 states have call successors, (2817), 539 states have call predecessors, (2817), 730 states have return successors, (3553), 2808 states have call predecessors, (3553), 2812 states have call successors, (3553) [2022-12-14 07:14:41,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11222 states to 11222 states and 18045 transitions. [2022-12-14 07:14:41,530 INFO L78 Accepts]: Start accepts. Automaton has 11222 states and 18045 transitions. Word has length 95 [2022-12-14 07:14:41,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:14:41,530 INFO L495 AbstractCegarLoop]: Abstraction has 11222 states and 18045 transitions. [2022-12-14 07:14:41,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 07:14:41,530 INFO L276 IsEmpty]: Start isEmpty. Operand 11222 states and 18045 transitions. [2022-12-14 07:14:41,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 07:14:41,532 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:14:41,532 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:14:41,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 07:14:41,533 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:14:41,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:14:41,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1152268950, now seen corresponding path program 1 times [2022-12-14 07:14:41,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:14:41,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209075680] [2022-12-14 07:14:41,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:14:41,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:14:41,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:14:41,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:14:41,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:14:41,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209075680] [2022-12-14 07:14:41,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209075680] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:14:41,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:14:41,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-14 07:14:41,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790252766] [2022-12-14 07:14:41,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:14:41,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 07:14:41,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:14:41,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 07:14:41,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-12-14 07:14:41,823 INFO L87 Difference]: Start difference. First operand 11222 states and 18045 transitions. Second operand has 13 states, 11 states have (on average 5.818181818181818) internal successors, (64), 11 states have internal predecessors, (64), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-12-14 07:14:45,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:14:45,592 INFO L93 Difference]: Finished difference Result 12410 states and 19855 transitions. [2022-12-14 07:14:45,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-14 07:14:45,593 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 5.818181818181818) internal successors, (64), 11 states have internal predecessors, (64), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) Word has length 101 [2022-12-14 07:14:45,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:14:45,624 INFO L225 Difference]: With dead ends: 12410 [2022-12-14 07:14:45,625 INFO L226 Difference]: Without dead ends: 12393 [2022-12-14 07:14:45,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 07:14:45,630 INFO L413 NwaCegarLoop]: 555 mSDtfsCounter, 2736 mSDsluCounter, 3399 mSDsCounter, 0 mSdLazyCounter, 7856 mSolverCounterSat, 1541 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2762 SdHoareTripleChecker+Valid, 3954 SdHoareTripleChecker+Invalid, 9397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1541 IncrementalHoareTripleChecker+Valid, 7856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-12-14 07:14:45,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2762 Valid, 3954 Invalid, 9397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1541 Valid, 7856 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-12-14 07:14:45,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12393 states. [2022-12-14 07:14:46,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12393 to 11862. [2022-12-14 07:14:46,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11862 states, 8169 states have (on average 1.5279715999510344) internal successors, (12482), 8596 states have internal predecessors, (12482), 2858 states have call successors, (2858), 644 states have call predecessors, (2858), 834 states have return successors, (3605), 2852 states have call predecessors, (3605), 2853 states have call successors, (3605) [2022-12-14 07:14:46,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11862 states to 11862 states and 18945 transitions. [2022-12-14 07:14:46,449 INFO L78 Accepts]: Start accepts. Automaton has 11862 states and 18945 transitions. Word has length 101 [2022-12-14 07:14:46,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:14:46,449 INFO L495 AbstractCegarLoop]: Abstraction has 11862 states and 18945 transitions. [2022-12-14 07:14:46,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 5.818181818181818) internal successors, (64), 11 states have internal predecessors, (64), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-12-14 07:14:46,450 INFO L276 IsEmpty]: Start isEmpty. Operand 11862 states and 18945 transitions. [2022-12-14 07:14:46,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-12-14 07:14:46,453 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:14:46,453 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:14:46,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 07:14:46,454 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:14:46,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:14:46,454 INFO L85 PathProgramCache]: Analyzing trace with hash -2118863520, now seen corresponding path program 1 times [2022-12-14 07:14:46,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:14:46,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265024162] [2022-12-14 07:14:46,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:14:46,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:14:46,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:14:46,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:14:46,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:14:46,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265024162] [2022-12-14 07:14:46,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265024162] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:14:46,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:14:46,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:14:46,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083579061] [2022-12-14 07:14:46,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:14:46,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:14:46,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:14:46,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:14:46,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:14:46,634 INFO L87 Difference]: Start difference. First operand 11862 states and 18945 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-12-14 07:14:48,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:14:48,647 INFO L93 Difference]: Finished difference Result 34530 states and 55917 transitions. [2022-12-14 07:14:48,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:14:48,648 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 107 [2022-12-14 07:14:48,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:14:48,729 INFO L225 Difference]: With dead ends: 34530 [2022-12-14 07:14:48,729 INFO L226 Difference]: Without dead ends: 22691 [2022-12-14 07:14:48,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:14:48,766 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 1177 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1248 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 1323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 07:14:48,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1248 Valid, 729 Invalid, 1323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 07:14:48,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22691 states. [2022-12-14 07:14:50,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22691 to 20821. [2022-12-14 07:14:50,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20821 states, 14381 states have (on average 1.5258326959182253) internal successors, (21943), 15215 states have internal predecessors, (21943), 4927 states have call successors, (4927), 1121 states have call predecessors, (4927), 1512 states have return successors, (6555), 4806 states have call predecessors, (6555), 4922 states have call successors, (6555) [2022-12-14 07:14:50,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20821 states to 20821 states and 33425 transitions. [2022-12-14 07:14:50,143 INFO L78 Accepts]: Start accepts. Automaton has 20821 states and 33425 transitions. Word has length 107 [2022-12-14 07:14:50,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:14:50,143 INFO L495 AbstractCegarLoop]: Abstraction has 20821 states and 33425 transitions. [2022-12-14 07:14:50,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-12-14 07:14:50,144 INFO L276 IsEmpty]: Start isEmpty. Operand 20821 states and 33425 transitions. [2022-12-14 07:14:50,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-14 07:14:50,145 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:14:50,145 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:14:50,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 07:14:50,146 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:14:50,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:14:50,146 INFO L85 PathProgramCache]: Analyzing trace with hash 237210427, now seen corresponding path program 1 times [2022-12-14 07:14:50,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:14:50,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165276252] [2022-12-14 07:14:50,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:14:50,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:14:50,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:14:50,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:14:50,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:14:50,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165276252] [2022-12-14 07:14:50,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165276252] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:14:50,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:14:50,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:14:50,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755212350] [2022-12-14 07:14:50,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:14:50,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:14:50,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:14:50,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:14:50,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:14:50,225 INFO L87 Difference]: Start difference. First operand 20821 states and 33425 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 4 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-12-14 07:14:51,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:14:51,526 INFO L93 Difference]: Finished difference Result 41290 states and 68245 transitions. [2022-12-14 07:14:51,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:14:51,527 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 4 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 109 [2022-12-14 07:14:51,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:14:51,601 INFO L225 Difference]: With dead ends: 41290 [2022-12-14 07:14:51,601 INFO L226 Difference]: Without dead ends: 22711 [2022-12-14 07:14:51,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:14:51,660 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 216 mSDsluCounter, 910 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 1513 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:14:51,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 1513 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:14:51,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22711 states. [2022-12-14 07:14:53,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22711 to 22711. [2022-12-14 07:14:53,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22711 states, 16194 states have (on average 1.5364332468815611) internal successors, (24881), 17105 states have internal predecessors, (24881), 4927 states have call successors, (4927), 1121 states have call predecessors, (4927), 1589 states have return successors, (6885), 4806 states have call predecessors, (6885), 4922 states have call successors, (6885) [2022-12-14 07:14:53,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22711 states to 22711 states and 36693 transitions. [2022-12-14 07:14:53,205 INFO L78 Accepts]: Start accepts. Automaton has 22711 states and 36693 transitions. Word has length 109 [2022-12-14 07:14:53,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:14:53,205 INFO L495 AbstractCegarLoop]: Abstraction has 22711 states and 36693 transitions. [2022-12-14 07:14:53,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 4 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-12-14 07:14:53,205 INFO L276 IsEmpty]: Start isEmpty. Operand 22711 states and 36693 transitions. [2022-12-14 07:14:53,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 07:14:53,207 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:14:53,207 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:14:53,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 07:14:53,207 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:14:53,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:14:53,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1260401781, now seen corresponding path program 1 times [2022-12-14 07:14:53,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:14:53,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317583257] [2022-12-14 07:14:53,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:14:53,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:14:53,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:14:53,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:14:53,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:14:53,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317583257] [2022-12-14 07:14:53,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317583257] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:14:53,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:14:53,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:14:53,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421759298] [2022-12-14 07:14:53,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:14:53,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:14:53,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:14:53,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:14:53,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:14:53,337 INFO L87 Difference]: Start difference. First operand 22711 states and 36693 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-12-14 07:14:56,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:14:56,617 INFO L93 Difference]: Finished difference Result 65965 states and 108592 transitions. [2022-12-14 07:14:56,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:14:56,617 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 108 [2022-12-14 07:14:56,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:14:56,759 INFO L225 Difference]: With dead ends: 65965 [2022-12-14 07:14:56,759 INFO L226 Difference]: Without dead ends: 43280 [2022-12-14 07:14:56,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:14:56,827 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 1162 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1232 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 07:14:56,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1232 Valid, 741 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 07:14:56,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43280 states. [2022-12-14 07:14:59,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43280 to 40934. [2022-12-14 07:15:00,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40934 states, 29277 states have (on average 1.5348567134610787) internal successors, (44936), 31139 states have internal predecessors, (44936), 8634 states have call successors, (8634), 2075 states have call predecessors, (8634), 3022 states have return successors, (13148), 8272 states have call predecessors, (13148), 8629 states have call successors, (13148) [2022-12-14 07:15:00,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40934 states to 40934 states and 66718 transitions. [2022-12-14 07:15:00,192 INFO L78 Accepts]: Start accepts. Automaton has 40934 states and 66718 transitions. Word has length 108 [2022-12-14 07:15:00,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:15:00,193 INFO L495 AbstractCegarLoop]: Abstraction has 40934 states and 66718 transitions. [2022-12-14 07:15:00,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-12-14 07:15:00,193 INFO L276 IsEmpty]: Start isEmpty. Operand 40934 states and 66718 transitions. [2022-12-14 07:15:00,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-14 07:15:00,195 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:15:00,195 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:15:00,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 07:15:00,195 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:15:00,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:15:00,195 INFO L85 PathProgramCache]: Analyzing trace with hash -417887742, now seen corresponding path program 1 times [2022-12-14 07:15:00,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:15:00,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715719007] [2022-12-14 07:15:00,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:15:00,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:15:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:15:00,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:15:00,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:15:00,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715719007] [2022-12-14 07:15:00,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715719007] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:15:00,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:15:00,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:15:00,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674020782] [2022-12-14 07:15:00,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:15:00,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:15:00,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:15:00,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:15:00,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:15:00,324 INFO L87 Difference]: Start difference. First operand 40934 states and 66718 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-12-14 07:15:06,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:15:06,829 INFO L93 Difference]: Finished difference Result 121024 states and 203549 transitions. [2022-12-14 07:15:06,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:15:06,830 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 109 [2022-12-14 07:15:06,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:15:07,155 INFO L225 Difference]: With dead ends: 121024 [2022-12-14 07:15:07,155 INFO L226 Difference]: Without dead ends: 80122 [2022-12-14 07:15:07,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:15:07,292 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 1150 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 371 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1219 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 07:15:07,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1219 Valid, 753 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [371 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 07:15:07,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80122 states. [2022-12-14 07:15:12,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80122 to 77799. [2022-12-14 07:15:12,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77799 states, 55692 states have (on average 1.5309918839330603) internal successors, (85264), 59538 states have internal predecessors, (85264), 16112 states have call successors, (16112), 3983 states have call predecessors, (16112), 5994 states have return successors, (27446), 15278 states have call predecessors, (27446), 16107 states have call successors, (27446) [2022-12-14 07:15:13,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77799 states to 77799 states and 128822 transitions. [2022-12-14 07:15:13,035 INFO L78 Accepts]: Start accepts. Automaton has 77799 states and 128822 transitions. Word has length 109 [2022-12-14 07:15:13,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:15:13,035 INFO L495 AbstractCegarLoop]: Abstraction has 77799 states and 128822 transitions. [2022-12-14 07:15:13,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-12-14 07:15:13,035 INFO L276 IsEmpty]: Start isEmpty. Operand 77799 states and 128822 transitions. [2022-12-14 07:15:13,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-12-14 07:15:13,037 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:15:13,037 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:15:13,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 07:15:13,037 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:15:13,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:15:13,037 INFO L85 PathProgramCache]: Analyzing trace with hash -69752403, now seen corresponding path program 1 times [2022-12-14 07:15:13,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:15:13,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136635958] [2022-12-14 07:15:13,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:15:13,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:15:13,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:15:13,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:15:13,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:15:13,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136635958] [2022-12-14 07:15:13,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136635958] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:15:13,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:15:13,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:15:13,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959401322] [2022-12-14 07:15:13,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:15:13,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:15:13,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:15:13,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:15:13,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:15:13,166 INFO L87 Difference]: Start difference. First operand 77799 states and 128822 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-12-14 07:15:24,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:15:24,572 INFO L93 Difference]: Finished difference Result 232451 states and 405206 transitions. [2022-12-14 07:15:24,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:15:24,573 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), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 110 [2022-12-14 07:15:24,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:15:25,263 INFO L225 Difference]: With dead ends: 232451 [2022-12-14 07:15:25,263 INFO L226 Difference]: Without dead ends: 154696 [2022-12-14 07:15:25,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:15:25,554 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 1137 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1205 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 07:15:25,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1205 Valid, 762 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 07:15:25,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154696 states. [2022-12-14 07:15:36,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154696 to 150956. [2022-12-14 07:15:36,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150956 states, 108027 states have (on average 1.5257667064715303) internal successors, (164824), 116025 states have internal predecessors, (164824), 30806 states have call successors, (30806), 7799 states have call predecessors, (30806), 12122 states have return successors, (61280), 29028 states have call predecessors, (61280), 30801 states have call successors, (61280) [2022-12-14 07:15:37,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150956 states to 150956 states and 256910 transitions. [2022-12-14 07:15:37,627 INFO L78 Accepts]: Start accepts. Automaton has 150956 states and 256910 transitions. Word has length 110 [2022-12-14 07:15:37,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:15:37,627 INFO L495 AbstractCegarLoop]: Abstraction has 150956 states and 256910 transitions. [2022-12-14 07:15:37,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-12-14 07:15:37,628 INFO L276 IsEmpty]: Start isEmpty. Operand 150956 states and 256910 transitions. [2022-12-14 07:15:37,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-12-14 07:15:37,631 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:15:37,631 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:15:37,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 07:15:37,631 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:15:37,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:15:37,632 INFO L85 PathProgramCache]: Analyzing trace with hash -2017746570, now seen corresponding path program 1 times [2022-12-14 07:15:37,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:15:37,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893280927] [2022-12-14 07:15:37,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:15:37,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:15:37,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:15:37,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:15:37,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:15:37,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893280927] [2022-12-14 07:15:37,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893280927] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:15:37,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:15:37,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:15:37,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059730532] [2022-12-14 07:15:37,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:15:37,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:15:37,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:15:37,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:15:37,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:15:37,778 INFO L87 Difference]: Start difference. First operand 150956 states and 256910 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-12-14 07:16:01,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:16:01,895 INFO L93 Difference]: Finished difference Result 454553 states and 840293 transitions. [2022-12-14 07:16:01,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:16:01,895 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 112 [2022-12-14 07:16:01,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:16:03,755 INFO L225 Difference]: With dead ends: 454553 [2022-12-14 07:16:03,755 INFO L226 Difference]: Without dead ends: 303655 [2022-12-14 07:16:04,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:16:04,668 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 1147 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1214 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 07:16:04,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1214 Valid, 755 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [367 Valid, 940 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 07:16:04,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303655 states. [2022-12-14 07:16:30,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303655 to 294900. [2022-12-14 07:16:30,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294900 states, 211275 states have (on average 1.5233558158797775) internal successors, (321847), 227279 states have internal predecessors, (321847), 59642 states have call successors, (59642), 15396 states have call predecessors, (59642), 23982 states have return successors, (137808), 55913 states have call predecessors, (137808), 59637 states have call successors, (137808) [2022-12-14 07:16:32,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294900 states to 294900 states and 519297 transitions. [2022-12-14 07:16:32,340 INFO L78 Accepts]: Start accepts. Automaton has 294900 states and 519297 transitions. Word has length 112 [2022-12-14 07:16:32,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:16:32,340 INFO L495 AbstractCegarLoop]: Abstraction has 294900 states and 519297 transitions. [2022-12-14 07:16:32,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-12-14 07:16:32,340 INFO L276 IsEmpty]: Start isEmpty. Operand 294900 states and 519297 transitions. [2022-12-14 07:16:32,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-12-14 07:16:32,346 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:16:32,346 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:16:32,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 07:16:32,347 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:16:32,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:16:32,347 INFO L85 PathProgramCache]: Analyzing trace with hash 2096285196, now seen corresponding path program 1 times [2022-12-14 07:16:32,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:16:32,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603123409] [2022-12-14 07:16:32,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:16:32,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:16:32,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:16:32,676 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 07:16:32,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:16:32,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603123409] [2022-12-14 07:16:32,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603123409] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:16:32,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396603089] [2022-12-14 07:16:32,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:16:32,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:16:32,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:16:32,678 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:16:32,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 07:16:32,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:16:32,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 2083 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 07:16:32,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:16:33,007 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 07:16:33,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:16:33,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396603089] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:16:33,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:16:33,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2022-12-14 07:16:33,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722962280] [2022-12-14 07:16:33,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:16:33,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:16:33,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:16:33,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:16:33,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-12-14 07:16:33,010 INFO L87 Difference]: Start difference. First operand 294900 states and 519297 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-14 07:16:57,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:16:57,324 INFO L93 Difference]: Finished difference Result 608698 states and 1104874 transitions. [2022-12-14 07:16:57,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:16:57,325 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 149 [2022-12-14 07:16:57,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:16:59,218 INFO L225 Difference]: With dead ends: 608698 [2022-12-14 07:16:59,218 INFO L226 Difference]: Without dead ends: 313815 [2022-12-14 07:17:00,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-12-14 07:17:00,671 INFO L413 NwaCegarLoop]: 494 mSDtfsCounter, 213 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1458 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:17:00,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1458 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:17:00,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313815 states. [2022-12-14 07:17:24,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313815 to 313815. [2022-12-14 07:17:25,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313815 states, 229705 states have (on average 1.555264360810605) internal successors, (357252), 245709 states have internal predecessors, (357252), 59642 states have call successors, (59642), 15881 states have call predecessors, (59642), 24467 states have return successors, (137808), 55913 states have call predecessors, (137808), 59637 states have call successors, (137808) [2022-12-14 07:17:26,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313815 states to 313815 states and 554702 transitions. [2022-12-14 07:17:26,942 INFO L78 Accepts]: Start accepts. Automaton has 313815 states and 554702 transitions. Word has length 149 [2022-12-14 07:17:26,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:17:26,943 INFO L495 AbstractCegarLoop]: Abstraction has 313815 states and 554702 transitions. [2022-12-14 07:17:26,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-14 07:17:26,943 INFO L276 IsEmpty]: Start isEmpty. Operand 313815 states and 554702 transitions. [2022-12-14 07:17:26,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-12-14 07:17:26,949 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:17:26,949 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:17:26,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 07:17:27,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:17:27,151 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:17:27,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:17:27,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1556564132, now seen corresponding path program 1 times [2022-12-14 07:17:27,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:17:27,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776240109] [2022-12-14 07:17:27,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:17:27,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:17:27,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:17:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-12-14 07:17:27,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:17:27,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776240109] [2022-12-14 07:17:27,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776240109] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:17:27,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304324579] [2022-12-14 07:17:27,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:17:27,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:17:27,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:17:27,290 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:17:27,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 07:17:27,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:17:27,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 2088 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 07:17:27,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:17:27,607 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 07:17:27,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:17:27,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304324579] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:17:27,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:17:27,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 07:17:27,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687899956] [2022-12-14 07:17:27,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:17:27,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:17:27,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:17:27,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:17:27,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:17:27,609 INFO L87 Difference]: Start difference. First operand 313815 states and 554702 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-14 07:17:51,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:17:51,450 INFO L93 Difference]: Finished difference Result 646528 states and 1174536 transitions. [2022-12-14 07:17:51,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:17:51,451 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 154 [2022-12-14 07:17:51,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:17:53,219 INFO L225 Difference]: With dead ends: 646528 [2022-12-14 07:17:53,220 INFO L226 Difference]: Without dead ends: 332730 [2022-12-14 07:17:54,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:17:54,495 INFO L413 NwaCegarLoop]: 494 mSDtfsCounter, 211 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1458 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:17:54,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1458 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:17:54,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332730 states. [2022-12-14 07:18:19,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332730 to 332730. [2022-12-14 07:18:19,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332730 states, 248135 states have (on average 1.5824329498055494) internal successors, (392657), 264139 states have internal predecessors, (392657), 59642 states have call successors, (59642), 16366 states have call predecessors, (59642), 24952 states have return successors, (137808), 55913 states have call predecessors, (137808), 59637 states have call successors, (137808) [2022-12-14 07:18:21,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332730 states to 332730 states and 590107 transitions. [2022-12-14 07:18:21,365 INFO L78 Accepts]: Start accepts. Automaton has 332730 states and 590107 transitions. Word has length 154 [2022-12-14 07:18:21,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:18:21,366 INFO L495 AbstractCegarLoop]: Abstraction has 332730 states and 590107 transitions. [2022-12-14 07:18:21,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-14 07:18:21,366 INFO L276 IsEmpty]: Start isEmpty. Operand 332730 states and 590107 transitions. [2022-12-14 07:18:21,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-12-14 07:18:21,373 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:18:21,373 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:18:21,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 07:18:21,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:18:21,575 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:18:21,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:18:21,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1212823380, now seen corresponding path program 1 times [2022-12-14 07:18:21,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:18:21,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208201428] [2022-12-14 07:18:21,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:18:21,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:18:21,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:18:21,697 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-12-14 07:18:21,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:18:21,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208201428] [2022-12-14 07:18:21,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208201428] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:18:21,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853442435] [2022-12-14 07:18:21,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:18:21,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:18:21,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:18:21,698 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:18:21,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 07:18:21,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:18:21,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 2092 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 07:18:21,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:18:22,008 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 07:18:22,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:18:22,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853442435] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:18:22,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:18:22,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 07:18:22,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310795081] [2022-12-14 07:18:22,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:18:22,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:18:22,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:18:22,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:18:22,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:18:22,010 INFO L87 Difference]: Start difference. First operand 332730 states and 590107 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-14 07:18:46,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:18:46,284 INFO L93 Difference]: Finished difference Result 684358 states and 1244198 transitions. [2022-12-14 07:18:46,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:18:46,285 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 158 [2022-12-14 07:18:46,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:18:48,286 INFO L225 Difference]: With dead ends: 684358 [2022-12-14 07:18:48,286 INFO L226 Difference]: Without dead ends: 351645 [2022-12-14 07:18:49,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:18:49,783 INFO L413 NwaCegarLoop]: 494 mSDtfsCounter, 209 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1458 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:18:49,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1458 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:18:50,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351645 states. [2022-12-14 07:19:14,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351645 to 351645. [2022-12-14 07:19:14,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351645 states, 266565 states have (on average 1.6058447283026653) internal successors, (428062), 282569 states have internal predecessors, (428062), 59642 states have call successors, (59642), 16851 states have call predecessors, (59642), 25437 states have return successors, (137808), 55913 states have call predecessors, (137808), 59637 states have call successors, (137808) [2022-12-14 07:19:16,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351645 states to 351645 states and 625512 transitions. [2022-12-14 07:19:16,675 INFO L78 Accepts]: Start accepts. Automaton has 351645 states and 625512 transitions. Word has length 158 [2022-12-14 07:19:16,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:19:16,675 INFO L495 AbstractCegarLoop]: Abstraction has 351645 states and 625512 transitions. [2022-12-14 07:19:16,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-14 07:19:16,675 INFO L276 IsEmpty]: Start isEmpty. Operand 351645 states and 625512 transitions. [2022-12-14 07:19:16,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-12-14 07:19:16,682 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:19:16,682 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:19:16,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 07:19:16,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 07:19:16,884 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:19:16,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:19:16,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1873935770, now seen corresponding path program 1 times [2022-12-14 07:19:16,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:19:16,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614983428] [2022-12-14 07:19:16,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:19:16,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:19:16,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:19:17,031 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-14 07:19:17,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:19:17,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614983428] [2022-12-14 07:19:17,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614983428] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:19:17,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506908280] [2022-12-14 07:19:17,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:19:17,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:19:17,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:19:17,032 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:19:17,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 07:19:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:19:17,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 2095 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 07:19:17,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:19:17,277 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 07:19:17,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:19:17,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506908280] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:19:17,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:19:17,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 07:19:17,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104100927] [2022-12-14 07:19:17,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:19:17,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:19:17,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:19:17,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:19:17,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:19:17,279 INFO L87 Difference]: Start difference. First operand 351645 states and 625512 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-14 07:19:41,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:19:41,769 INFO L93 Difference]: Finished difference Result 722188 states and 1313860 transitions. [2022-12-14 07:19:41,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:19:41,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 161 [2022-12-14 07:19:41,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:19:43,638 INFO L225 Difference]: With dead ends: 722188 [2022-12-14 07:19:43,638 INFO L226 Difference]: Without dead ends: 370560 [2022-12-14 07:19:45,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:19:45,090 INFO L413 NwaCegarLoop]: 494 mSDtfsCounter, 207 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1458 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:19:45,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1458 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:19:45,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370560 states. [2022-12-14 07:20:10,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370560 to 370560. [2022-12-14 07:20:10,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370560 states, 284995 states have (on average 1.6262285303250934) internal successors, (463467), 300999 states have internal predecessors, (463467), 59642 states have call successors, (59642), 17336 states have call predecessors, (59642), 25922 states have return successors, (137808), 55913 states have call predecessors, (137808), 59637 states have call successors, (137808) [2022-12-14 07:20:12,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370560 states to 370560 states and 660917 transitions. [2022-12-14 07:20:12,912 INFO L78 Accepts]: Start accepts. Automaton has 370560 states and 660917 transitions. Word has length 161 [2022-12-14 07:20:12,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:20:12,912 INFO L495 AbstractCegarLoop]: Abstraction has 370560 states and 660917 transitions. [2022-12-14 07:20:12,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-14 07:20:12,912 INFO L276 IsEmpty]: Start isEmpty. Operand 370560 states and 660917 transitions. [2022-12-14 07:20:12,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-12-14 07:20:12,918 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:20:12,918 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:20:12,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 07:20:13,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-14 07:20:13,120 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:20:13,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:20:13,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1939378004, now seen corresponding path program 1 times [2022-12-14 07:20:13,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:20:13,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703036153] [2022-12-14 07:20:13,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:20:13,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:20:13,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:20:13,438 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 07:20:13,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:20:13,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703036153] [2022-12-14 07:20:13,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703036153] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:20:13,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411438135] [2022-12-14 07:20:13,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:20:13,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:20:13,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:20:13,440 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:20:13,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea85e88-0353-4e78-850c-f0c499400f06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 07:20:13,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:20:13,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 2091 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-14 07:20:13,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:20:14,489 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-14 07:20:14,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:20:16,802 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 07:20:22,624 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 07:20:22,916 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 07:20:28,697 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 07:20:28,975 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 07:20:34,629 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 07:20:34,905 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 07:20:40,714 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 07:20:40,797 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 49188 disjunctions. This might take some time... [2022-12-14 07:23:07,782 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 49188 disjunctions.