./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 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ce78e0-a66c-49b6-84e7-7cc3772e463e/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ce78e0-a66c-49b6-84e7-7cc3772e463e/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ce78e0-a66c-49b6-84e7-7cc3772e463e/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ce78e0-a66c-49b6-84e7-7cc3772e463e/bin/utaipan-6cKwYrpEi9/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_05ce78e0-a66c-49b6-84e7-7cc3772e463e/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ce78e0-a66c-49b6-84e7-7cc3772e463e/bin/utaipan-6cKwYrpEi9 --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-6b4ec56 [2022-11-20 20:14:10,712 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:14:10,714 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:14:10,737 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:14:10,737 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:14:10,738 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:14:10,740 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:14:10,742 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:14:10,744 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:14:10,745 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:14:10,746 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:14:10,747 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:14:10,748 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:14:10,749 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:14:10,750 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:14:10,751 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:14:10,752 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:14:10,754 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:14:10,755 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:14:10,757 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:14:10,759 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:14:10,760 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:14:10,762 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:14:10,763 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:14:10,767 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:14:10,767 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:14:10,768 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:14:10,769 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:14:10,770 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:14:10,771 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:14:10,771 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:14:10,772 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:14:10,773 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:14:10,774 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:14:10,775 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:14:10,776 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:14:10,777 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:14:10,777 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:14:10,777 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:14:10,778 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:14:10,779 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:14:10,780 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ce78e0-a66c-49b6-84e7-7cc3772e463e/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 20:14:10,805 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:14:10,806 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:14:10,806 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:14:10,806 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:14:10,807 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:14:10,807 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:14:10,808 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:14:10,808 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:14:10,808 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:14:10,809 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:14:10,809 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:14:10,809 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:14:10,809 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:14:10,810 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:14:10,810 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:14:10,811 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:14:10,811 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:14:10,811 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:14:10,812 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:14:10,812 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:14:10,813 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:14:10,813 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:14:10,813 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:14:10,813 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:14:10,814 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:14:10,814 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:14:10,814 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:14:10,814 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:14:10,815 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:14:10,815 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:14:10,815 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:14:10,815 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:14:10,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:14:10,816 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:14:10,816 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:14:10,816 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:14:10,817 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:14:10,817 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:14:10,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:14:10,817 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:14:10,817 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:14:10,818 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_05ce78e0-a66c-49b6-84e7-7cc3772e463e/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ce78e0-a66c-49b6-84e7-7cc3772e463e/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3416b3e017f399176a4f7a837e050107ced7390b025fd07360efb8b6075a94d [2022-11-20 20:14:11,099 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:14:11,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:14:11,135 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:14:11,137 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:14:11,137 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:14:11,139 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ce78e0-a66c-49b6-84e7-7cc3772e463e/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/product-lines/elevator_spec2_product30.cil.c [2022-11-20 20:14:14,234 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:14:14,726 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:14:14,727 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ce78e0-a66c-49b6-84e7-7cc3772e463e/sv-benchmarks/c/product-lines/elevator_spec2_product30.cil.c [2022-11-20 20:14:14,768 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ce78e0-a66c-49b6-84e7-7cc3772e463e/bin/utaipan-6cKwYrpEi9/data/489e7c983/c91b05b02d4542828abd1de4d80c2f22/FLAG7248adce4 [2022-11-20 20:14:14,788 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ce78e0-a66c-49b6-84e7-7cc3772e463e/bin/utaipan-6cKwYrpEi9/data/489e7c983/c91b05b02d4542828abd1de4d80c2f22 [2022-11-20 20:14:14,794 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:14:14,796 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:14:14,802 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:14:14,802 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:14:14,806 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:14:14,807 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:14:14" (1/1) ... [2022-11-20 20:14:14,808 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ed91a99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:14, skipping insertion in model container [2022-11-20 20:14:14,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:14:14" (1/1) ... [2022-11-20 20:14:14,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:14:14,893 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:14:15,230 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_05ce78e0-a66c-49b6-84e7-7cc3772e463e/sv-benchmarks/c/product-lines/elevator_spec2_product30.cil.c[10611,10624] [2022-11-20 20:14:15,535 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:14:15,547 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:14:15,576 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_05ce78e0-a66c-49b6-84e7-7cc3772e463e/sv-benchmarks/c/product-lines/elevator_spec2_product30.cil.c[10611,10624] [2022-11-20 20:14:15,665 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:14:15,692 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:14:15,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:15 WrapperNode [2022-11-20 20:14:15,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:14:15,694 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:14:15,694 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:14:15,695 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:14:15,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:15" (1/1) ... [2022-11-20 20:14:15,733 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:15" (1/1) ... [2022-11-20 20:14:15,792 INFO L138 Inliner]: procedures = 95, calls = 347, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 920 [2022-11-20 20:14:15,792 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:14:15,793 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:14:15,793 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:14:15,794 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:14:15,804 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:15" (1/1) ... [2022-11-20 20:14:15,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:15" (1/1) ... [2022-11-20 20:14:15,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:15" (1/1) ... [2022-11-20 20:14:15,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:15" (1/1) ... [2022-11-20 20:14:15,839 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:15" (1/1) ... [2022-11-20 20:14:15,855 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:15" (1/1) ... [2022-11-20 20:14:15,860 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:15" (1/1) ... [2022-11-20 20:14:15,864 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:15" (1/1) ... [2022-11-20 20:14:15,872 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:14:15,873 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:14:15,873 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:14:15,873 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:14:15,874 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:15" (1/1) ... [2022-11-20 20:14:15,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:14:15,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ce78e0-a66c-49b6-84e7-7cc3772e463e/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:14:15,922 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ce78e0-a66c-49b6-84e7-7cc3772e463e/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:14:15,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ce78e0-a66c-49b6-84e7-7cc3772e463e/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:14:15,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 20:14:15,977 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-20 20:14:15,978 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-20 20:14:15,978 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-20 20:14:15,978 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-20 20:14:15,978 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-20 20:14:15,978 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-20 20:14:15,978 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-20 20:14:15,979 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-20 20:14:15,979 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-20 20:14:15,979 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-20 20:14:15,979 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-20 20:14:15,979 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-20 20:14:15,979 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-20 20:14:15,980 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-20 20:14:15,980 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-20 20:14:15,980 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-20 20:14:15,980 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-20 20:14:15,980 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-20 20:14:15,980 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-20 20:14:15,981 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-20 20:14:15,981 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-20 20:14:15,982 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-20 20:14:15,983 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-20 20:14:15,983 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-20 20:14:15,984 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-20 20:14:15,984 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-20 20:14:15,984 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-20 20:14:15,984 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-20 20:14:15,984 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-20 20:14:15,985 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-20 20:14:15,985 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-20 20:14:15,985 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-20 20:14:15,985 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-20 20:14:15,985 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-20 20:14:15,985 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-20 20:14:15,986 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-20 20:14:15,986 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-20 20:14:15,986 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-20 20:14:15,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 20:14:15,986 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-20 20:14:15,986 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-20 20:14:15,987 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-20 20:14:15,987 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-20 20:14:15,987 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-20 20:14:15,987 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-20 20:14:15,988 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-20 20:14:15,988 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-20 20:14:15,989 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2022-11-20 20:14:15,990 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2022-11-20 20:14:15,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:14:15,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:14:15,990 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-20 20:14:15,991 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-20 20:14:16,201 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:14:16,203 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:14:17,614 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:14:18,420 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:14:18,420 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 20:14:18,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:14:18 BoogieIcfgContainer [2022-11-20 20:14:18,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:14:18,429 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:14:18,430 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:14:18,433 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:14:18,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:14:14" (1/3) ... [2022-11-20 20:14:18,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30088d2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:14:18, skipping insertion in model container [2022-11-20 20:14:18,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:15" (2/3) ... [2022-11-20 20:14:18,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30088d2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:14:18, skipping insertion in model container [2022-11-20 20:14:18,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:14:18" (3/3) ... [2022-11-20 20:14:18,439 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product30.cil.c [2022-11-20 20:14:18,461 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:14:18,461 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 20:14:18,550 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:14:18,557 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;@736b619e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:14:18,558 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 20:14:18,600 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) [2022-11-20 20:14:18,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 20:14:18,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:14:18,630 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] [2022-11-20 20:14:18,631 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:14:18,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:14:18,639 INFO L85 PathProgramCache]: Analyzing trace with hash 399077073, now seen corresponding path program 1 times [2022-11-20 20:14:18,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:14:18,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327891725] [2022-11-20 20:14:18,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:14:18,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:14:18,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:14:19,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:19,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:14:19,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327891725] [2022-11-20 20:14:19,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327891725] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:14:19,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:14:19,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:14:19,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481920864] [2022-11-20 20:14:19,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:14:19,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 20:14:19,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:14:19,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 20:14:19,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 20:14:19,193 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) [2022-11-20 20:14:19,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:14:19,434 INFO L93 Difference]: Finished difference Result 401 states and 634 transitions. [2022-11-20 20:14:19,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 20:14:19,437 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 [2022-11-20 20:14:19,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:14:19,454 INFO L225 Difference]: With dead ends: 401 [2022-11-20 20:14:19,454 INFO L226 Difference]: Without dead ends: 379 [2022-11-20 20:14:19,458 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 [2022-11-20 20:14:19,462 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 [2022-11-20 20:14:19,463 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] [2022-11-20 20:14:19,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-11-20 20:14:19,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2022-11-20 20:14:19,533 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) [2022-11-20 20:14:19,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 596 transitions. [2022-11-20 20:14:19,540 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 596 transitions. Word has length 43 [2022-11-20 20:14:19,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:14:19,542 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 596 transitions. [2022-11-20 20:14:19,543 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) [2022-11-20 20:14:19,543 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 596 transitions. [2022-11-20 20:14:19,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 20:14:19,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:14:19,547 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] [2022-11-20 20:14:19,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 20:14:19,547 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:14:19,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:14:19,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1563562737, now seen corresponding path program 1 times [2022-11-20 20:14:19,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:14:19,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760534893] [2022-11-20 20:14:19,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:14:19,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:14:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:14:20,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:20,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:14:20,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760534893] [2022-11-20 20:14:20,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760534893] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:14:20,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:14:20,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 20:14:20,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938583740] [2022-11-20 20:14:20,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:14:20,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:14:20,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:14:20,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:14:20,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:14:20,230 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) [2022-11-20 20:14:22,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:14:22,887 INFO L93 Difference]: Finished difference Result 1243 states and 1996 transitions. [2022-11-20 20:14:22,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:14:22,889 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 [2022-11-20 20:14:22,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:14:22,897 INFO L225 Difference]: With dead ends: 1243 [2022-11-20 20:14:22,897 INFO L226 Difference]: Without dead ends: 880 [2022-11-20 20:14:22,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:14:22,903 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 1231 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 1640 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1298 SdHoareTripleChecker+Valid, 1103 SdHoareTripleChecker+Invalid, 2085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 1640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:14:22,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1298 Valid, 1103 Invalid, 2085 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [445 Valid, 1640 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-20 20:14:22,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-11-20 20:14:22,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 793. [2022-11-20 20:14:22,972 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) [2022-11-20 20:14:22,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1277 transitions. [2022-11-20 20:14:22,980 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1277 transitions. Word has length 44 [2022-11-20 20:14:22,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:14:22,980 INFO L495 AbstractCegarLoop]: Abstraction has 793 states and 1277 transitions. [2022-11-20 20:14:22,980 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) [2022-11-20 20:14:22,980 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1277 transitions. [2022-11-20 20:14:22,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-20 20:14:22,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:14:22,985 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] [2022-11-20 20:14:22,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 20:14:22,985 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:14:22,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:14:22,986 INFO L85 PathProgramCache]: Analyzing trace with hash 92014309, now seen corresponding path program 1 times [2022-11-20 20:14:22,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:14:22,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396255597] [2022-11-20 20:14:22,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:14:22,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:14:23,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:14:23,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:23,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:14:23,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396255597] [2022-11-20 20:14:23,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396255597] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:14:23,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:14:23,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 20:14:23,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050366908] [2022-11-20 20:14:23,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:14:23,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:14:23,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:14:23,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:14:23,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:14:23,321 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) [2022-11-20 20:14:23,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:14:23,713 INFO L93 Difference]: Finished difference Result 1760 states and 2872 transitions. [2022-11-20 20:14:23,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:14:23,714 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 [2022-11-20 20:14:23,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:14:23,726 INFO L225 Difference]: With dead ends: 1760 [2022-11-20 20:14:23,726 INFO L226 Difference]: Without dead ends: 984 [2022-11-20 20:14:23,735 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 [2022-11-20 20:14:23,738 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, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:14:23,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 2282 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 20:14:23,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-11-20 20:14:23,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 799. [2022-11-20 20:14:23,832 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) [2022-11-20 20:14:23,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1283 transitions. [2022-11-20 20:14:23,846 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1283 transitions. Word has length 76 [2022-11-20 20:14:23,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:14:23,848 INFO L495 AbstractCegarLoop]: Abstraction has 799 states and 1283 transitions. [2022-11-20 20:14:23,848 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) [2022-11-20 20:14:23,849 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1283 transitions. [2022-11-20 20:14:23,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-20 20:14:23,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:14:23,854 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] [2022-11-20 20:14:23,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 20:14:23,854 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:14:23,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:14:23,855 INFO L85 PathProgramCache]: Analyzing trace with hash 2111720301, now seen corresponding path program 1 times [2022-11-20 20:14:23,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:14:23,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959421810] [2022-11-20 20:14:23,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:14:23,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:14:23,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:14:24,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:14:24,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:14:24,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959421810] [2022-11-20 20:14:24,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959421810] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:14:24,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:14:24,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 20:14:24,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306725495] [2022-11-20 20:14:24,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:14:24,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 20:14:24,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:14:24,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 20:14:24,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:14:24,423 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) [2022-11-20 20:14:28,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:14:28,230 INFO L93 Difference]: Finished difference Result 2761 states and 4474 transitions. [2022-11-20 20:14:28,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 20:14:28,231 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 [2022-11-20 20:14:28,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:14:28,247 INFO L225 Difference]: With dead ends: 2761 [2022-11-20 20:14:28,247 INFO L226 Difference]: Without dead ends: 1978 [2022-11-20 20:14:28,256 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 [2022-11-20 20:14:28,266 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 1359 mSDsluCounter, 1609 mSDsCounter, 0 mSdLazyCounter, 4426 mSolverCounterSat, 683 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1434 SdHoareTripleChecker+Valid, 2160 SdHoareTripleChecker+Invalid, 5109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 683 IncrementalHoareTripleChecker+Valid, 4426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:14:28,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1434 Valid, 2160 Invalid, 5109 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [683 Valid, 4426 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-20 20:14:28,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2022-11-20 20:14:28,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1791. [2022-11-20 20:14:28,435 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) [2022-11-20 20:14:28,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 2888 transitions. [2022-11-20 20:14:28,456 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 2888 transitions. Word has length 77 [2022-11-20 20:14:28,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:14:28,456 INFO L495 AbstractCegarLoop]: Abstraction has 1791 states and 2888 transitions. [2022-11-20 20:14:28,456 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) [2022-11-20 20:14:28,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 2888 transitions. [2022-11-20 20:14:28,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-20 20:14:28,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:14:28,461 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] [2022-11-20 20:14:28,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 20:14:28,462 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:14:28,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:14:28,463 INFO L85 PathProgramCache]: Analyzing trace with hash -60652630, now seen corresponding path program 1 times [2022-11-20 20:14:28,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:14:28,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252859616] [2022-11-20 20:14:28,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:14:28,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:14:28,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:14:28,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:14:28,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:14:28,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252859616] [2022-11-20 20:14:28,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252859616] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:14:28,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:14:28,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 20:14:28,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186933528] [2022-11-20 20:14:28,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:14:28,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 20:14:28,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:14:28,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 20:14:28,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:14:28,949 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) [2022-11-20 20:14:32,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:14:32,525 INFO L93 Difference]: Finished difference Result 5038 states and 8145 transitions. [2022-11-20 20:14:32,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 20:14:32,526 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 [2022-11-20 20:14:32,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:14:32,550 INFO L225 Difference]: With dead ends: 5038 [2022-11-20 20:14:32,550 INFO L226 Difference]: Without dead ends: 3265 [2022-11-20 20:14:32,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-11-20 20:14:32,563 INFO L413 NwaCegarLoop]: 409 mSDtfsCounter, 1745 mSDsluCounter, 2196 mSDsCounter, 0 mSdLazyCounter, 3974 mSolverCounterSat, 595 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s 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, 3.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:14:32,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1811 Valid, 2605 Invalid, 4569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [595 Valid, 3974 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-20 20:14:32,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3265 states. [2022-11-20 20:14:32,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3265 to 3103. [2022-11-20 20:14:32,890 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) [2022-11-20 20:14:32,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3103 states to 3103 states and 5025 transitions. [2022-11-20 20:14:32,927 INFO L78 Accepts]: Start accepts. Automaton has 3103 states and 5025 transitions. Word has length 78 [2022-11-20 20:14:32,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:14:32,927 INFO L495 AbstractCegarLoop]: Abstraction has 3103 states and 5025 transitions. [2022-11-20 20:14:32,928 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) [2022-11-20 20:14:32,928 INFO L276 IsEmpty]: Start isEmpty. Operand 3103 states and 5025 transitions. [2022-11-20 20:14:32,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-20 20:14:32,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:14:32,931 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] [2022-11-20 20:14:32,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 20:14:32,932 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:14:32,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:14:32,932 INFO L85 PathProgramCache]: Analyzing trace with hash 2142430362, now seen corresponding path program 1 times [2022-11-20 20:14:32,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:14:32,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190744068] [2022-11-20 20:14:32,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:14:32,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:14:32,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:14:33,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:14:33,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:14:33,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190744068] [2022-11-20 20:14:33,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190744068] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:14:33,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:14:33,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 20:14:33,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84850300] [2022-11-20 20:14:33,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:14:33,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 20:14:33,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:14:33,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 20:14:33,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:14:33,259 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) [2022-11-20 20:14:33,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:14:33,656 INFO L93 Difference]: Finished difference Result 5542 states and 8993 transitions. [2022-11-20 20:14:33,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:14:33,657 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 [2022-11-20 20:14:33,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:14:33,684 INFO L225 Difference]: With dead ends: 5542 [2022-11-20 20:14:33,685 INFO L226 Difference]: Without dead ends: 3215 [2022-11-20 20:14:33,699 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 [2022-11-20 20:14:33,700 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:14:33,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3345 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:14:33,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3215 states. [2022-11-20 20:14:33,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3215 to 3173. [2022-11-20 20:14:33,938 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) [2022-11-20 20:14:33,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3173 states to 3173 states and 5125 transitions. [2022-11-20 20:14:33,956 INFO L78 Accepts]: Start accepts. Automaton has 3173 states and 5125 transitions. Word has length 83 [2022-11-20 20:14:33,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:14:33,959 INFO L495 AbstractCegarLoop]: Abstraction has 3173 states and 5125 transitions. [2022-11-20 20:14:33,959 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) [2022-11-20 20:14:33,959 INFO L276 IsEmpty]: Start isEmpty. Operand 3173 states and 5125 transitions. [2022-11-20 20:14:33,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-20 20:14:33,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:14:33,964 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] [2022-11-20 20:14:33,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 20:14:33,965 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:14:33,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:14:33,965 INFO L85 PathProgramCache]: Analyzing trace with hash -2034124166, now seen corresponding path program 1 times [2022-11-20 20:14:33,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:14:33,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981335229] [2022-11-20 20:14:33,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:14:33,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:14:34,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:14:34,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:14:34,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:14:34,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981335229] [2022-11-20 20:14:34,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981335229] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:14:34,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:14:34,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 20:14:34,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209843462] [2022-11-20 20:14:34,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:14:34,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 20:14:34,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:14:34,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 20:14:34,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:14:34,269 INFO L87 Difference]: Start difference. First operand 3173 states and 5125 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) [2022-11-20 20:14:34,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:14:34,652 INFO L93 Difference]: Finished difference Result 5648 states and 9133 transitions. [2022-11-20 20:14:34,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:14:34,653 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 [2022-11-20 20:14:34,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:14:34,675 INFO L225 Difference]: With dead ends: 5648 [2022-11-20 20:14:34,675 INFO L226 Difference]: Without dead ends: 3265 [2022-11-20 20:14:34,688 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 [2022-11-20 20:14:34,689 INFO L413 NwaCegarLoop]: 561 mSDtfsCounter, 7 mSDsluCounter, 2765 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 3326 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:14:34,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 3326 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:14:34,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3265 states. [2022-11-20 20:14:34,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3265 to 3183. [2022-11-20 20:14:34,953 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) [2022-11-20 20:14:34,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3183 states to 3183 states and 5135 transitions. [2022-11-20 20:14:34,970 INFO L78 Accepts]: Start accepts. Automaton has 3183 states and 5135 transitions. Word has length 83 [2022-11-20 20:14:34,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:14:34,970 INFO L495 AbstractCegarLoop]: Abstraction has 3183 states and 5135 transitions. [2022-11-20 20:14:34,970 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) [2022-11-20 20:14:34,971 INFO L276 IsEmpty]: Start isEmpty. Operand 3183 states and 5135 transitions. [2022-11-20 20:14:34,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-20 20:14:34,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:14:34,974 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] [2022-11-20 20:14:34,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 20:14:34,974 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:14:34,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:14:34,975 INFO L85 PathProgramCache]: Analyzing trace with hash 565475326, now seen corresponding path program 1 times [2022-11-20 20:14:34,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:14:34,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19171419] [2022-11-20 20:14:34,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:14:34,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:14:35,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:14:35,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:14:35,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:14:35,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19171419] [2022-11-20 20:14:35,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19171419] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:14:35,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:14:35,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 20:14:35,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941796100] [2022-11-20 20:14:35,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:14:35,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 20:14:35,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:14:35,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 20:14:35,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:14:35,239 INFO L87 Difference]: Start difference. First operand 3183 states and 5135 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) [2022-11-20 20:14:35,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:14:35,706 INFO L93 Difference]: Finished difference Result 5666 states and 9151 transitions. [2022-11-20 20:14:35,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:14:35,708 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 [2022-11-20 20:14:35,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:14:35,730 INFO L225 Difference]: With dead ends: 5666 [2022-11-20 20:14:35,731 INFO L226 Difference]: Without dead ends: 3275 [2022-11-20 20:14:35,743 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 [2022-11-20 20:14:35,745 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 7 mSDsluCounter, 2769 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3331 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:14:35,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3331 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:14:35,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3275 states. [2022-11-20 20:14:35,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3275 to 3193. [2022-11-20 20:14:35,983 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) [2022-11-20 20:14:36,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3193 states to 3193 states and 5145 transitions. [2022-11-20 20:14:36,061 INFO L78 Accepts]: Start accepts. Automaton has 3193 states and 5145 transitions. Word has length 82 [2022-11-20 20:14:36,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:14:36,061 INFO L495 AbstractCegarLoop]: Abstraction has 3193 states and 5145 transitions. [2022-11-20 20:14:36,062 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) [2022-11-20 20:14:36,063 INFO L276 IsEmpty]: Start isEmpty. Operand 3193 states and 5145 transitions. [2022-11-20 20:14:36,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-20 20:14:36,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:14:36,066 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] [2022-11-20 20:14:36,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 20:14:36,066 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:14:36,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:14:36,068 INFO L85 PathProgramCache]: Analyzing trace with hash 653547734, now seen corresponding path program 1 times [2022-11-20 20:14:36,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:14:36,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271731970] [2022-11-20 20:14:36,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:14:36,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:14:36,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:14:36,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:14:36,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:14:36,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271731970] [2022-11-20 20:14:36,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271731970] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:14:36,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:14:36,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 20:14:36,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2853223] [2022-11-20 20:14:36,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:14:36,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 20:14:36,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:14:36,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 20:14:36,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:14:36,411 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) [2022-11-20 20:14:39,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:14:39,680 INFO L93 Difference]: Finished difference Result 7977 states and 12939 transitions. [2022-11-20 20:14:39,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:14:39,684 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 [2022-11-20 20:14:39,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:14:39,717 INFO L225 Difference]: With dead ends: 7977 [2022-11-20 20:14:39,717 INFO L226 Difference]: Without dead ends: 5336 [2022-11-20 20:14:39,730 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 [2022-11-20 20:14:39,733 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 3334 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 2266 mSolverCounterSat, 1521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3500 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 3787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1521 IncrementalHoareTripleChecker+Valid, 2266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-20 20:14:39,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3500 Valid, 1248 Invalid, 3787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1521 Valid, 2266 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-20 20:14:39,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5336 states. [2022-11-20 20:14:40,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5336 to 5197. [2022-11-20 20:14:40,135 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) [2022-11-20 20:14:40,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5197 states to 5197 states and 8265 transitions. [2022-11-20 20:14:40,239 INFO L78 Accepts]: Start accepts. Automaton has 5197 states and 8265 transitions. Word has length 86 [2022-11-20 20:14:40,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:14:40,240 INFO L495 AbstractCegarLoop]: Abstraction has 5197 states and 8265 transitions. [2022-11-20 20:14:40,240 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) [2022-11-20 20:14:40,240 INFO L276 IsEmpty]: Start isEmpty. Operand 5197 states and 8265 transitions. [2022-11-20 20:14:40,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-20 20:14:40,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:14:40,244 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] [2022-11-20 20:14:40,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 20:14:40,244 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:14:40,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:14:40,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1104425543, now seen corresponding path program 1 times [2022-11-20 20:14:40,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:14:40,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072323933] [2022-11-20 20:14:40,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:14:40,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:14:40,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:14:40,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:14:40,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:14:40,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072323933] [2022-11-20 20:14:40,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072323933] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:14:40,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:14:40,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-20 20:14:40,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740503857] [2022-11-20 20:14:40,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:14:40,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 20:14:40,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:14:40,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 20:14:40,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:14:40,824 INFO L87 Difference]: Start difference. First operand 5197 states and 8265 transitions. Second operand has 13 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 8 states have call successors, (15), 3 states have call predecessors, (15), 6 states have return successors, (14), 7 states have call predecessors, (14), 8 states have call successors, (14) [2022-11-20 20:14:46,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:14:46,697 INFO L93 Difference]: Finished difference Result 10920 states and 17665 transitions. [2022-11-20 20:14:46,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 20:14:46,698 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 8 states have call successors, (15), 3 states have call predecessors, (15), 6 states have return successors, (14), 7 states have call predecessors, (14), 8 states have call successors, (14) Word has length 90 [2022-11-20 20:14:46,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:14:46,737 INFO L225 Difference]: With dead ends: 10920 [2022-11-20 20:14:46,737 INFO L226 Difference]: Without dead ends: 6187 [2022-11-20 20:14:46,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=1434, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 20:14:46,768 INFO L413 NwaCegarLoop]: 537 mSDtfsCounter, 2195 mSDsluCounter, 4034 mSDsCounter, 0 mSdLazyCounter, 7673 mSolverCounterSat, 1256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2213 SdHoareTripleChecker+Valid, 4571 SdHoareTripleChecker+Invalid, 8929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1256 IncrementalHoareTripleChecker+Valid, 7673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:14:46,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2213 Valid, 4571 Invalid, 8929 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1256 Valid, 7673 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-11-20 20:14:46,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6187 states. [2022-11-20 20:14:47,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6187 to 5993. [2022-11-20 20:14:47,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5993 states, 4349 states have (on average 1.5419636698091514) internal successors, (6706), 4510 states have internal predecessors, (6706), 1266 states have call successors, (1266), 277 states have call predecessors, (1266), 377 states have return successors, (1486), 1282 states have call predecessors, (1486), 1261 states have call successors, (1486) [2022-11-20 20:14:47,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5993 states to 5993 states and 9458 transitions. [2022-11-20 20:14:47,341 INFO L78 Accepts]: Start accepts. Automaton has 5993 states and 9458 transitions. Word has length 90 [2022-11-20 20:14:47,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:14:47,342 INFO L495 AbstractCegarLoop]: Abstraction has 5993 states and 9458 transitions. [2022-11-20 20:14:47,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 8 states have call successors, (15), 3 states have call predecessors, (15), 6 states have return successors, (14), 7 states have call predecessors, (14), 8 states have call successors, (14) [2022-11-20 20:14:47,343 INFO L276 IsEmpty]: Start isEmpty. Operand 5993 states and 9458 transitions. [2022-11-20 20:14:47,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-20 20:14:47,346 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:14:47,347 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] [2022-11-20 20:14:47,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 20:14:47,347 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:14:47,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:14:47,348 INFO L85 PathProgramCache]: Analyzing trace with hash 477129719, now seen corresponding path program 1 times [2022-11-20 20:14:47,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:14:47,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611603610] [2022-11-20 20:14:47,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:14:47,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:14:47,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:14:47,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:14:47,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:14:47,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611603610] [2022-11-20 20:14:47,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611603610] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:14:47,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:14:47,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 20:14:47,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260759661] [2022-11-20 20:14:47,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:14:47,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:14:47,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:14:47,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:14:47,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:14:47,632 INFO L87 Difference]: Start difference. First operand 5993 states and 9458 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) [2022-11-20 20:14:51,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:14:51,662 INFO L93 Difference]: Finished difference Result 19466 states and 31476 transitions. [2022-11-20 20:14:51,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 20:14:51,663 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 [2022-11-20 20:14:51,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:14:51,729 INFO L225 Difference]: With dead ends: 19466 [2022-11-20 20:14:51,729 INFO L226 Difference]: Without dead ends: 13491 [2022-11-20 20:14:51,764 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 [2022-11-20 20:14:51,765 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 2232 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 2944 mSolverCounterSat, 961 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s 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, 2.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:14:51,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2345 Valid, 1742 Invalid, 3905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [961 Valid, 2944 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-20 20:14:51,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13491 states. [2022-11-20 20:14:53,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13491 to 12600. [2022-11-20 20:14:53,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12600 states, 8975 states have (on average 1.530807799442897) internal successors, (13739), 9418 states have internal predecessors, (13739), 2854 states have call successors, (2854), 565 states have call predecessors, (2854), 770 states have return successors, (3516), 2847 states have call predecessors, (3516), 2849 states have call successors, (3516) [2022-11-20 20:14:53,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12600 states to 12600 states and 20109 transitions. [2022-11-20 20:14:53,094 INFO L78 Accepts]: Start accepts. Automaton has 12600 states and 20109 transitions. Word has length 90 [2022-11-20 20:14:53,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:14:53,095 INFO L495 AbstractCegarLoop]: Abstraction has 12600 states and 20109 transitions. [2022-11-20 20:14:53,095 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) [2022-11-20 20:14:53,096 INFO L276 IsEmpty]: Start isEmpty. Operand 12600 states and 20109 transitions. [2022-11-20 20:14:53,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-20 20:14:53,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:14:53,100 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] [2022-11-20 20:14:53,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 20:14:53,101 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:14:53,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:14:53,101 INFO L85 PathProgramCache]: Analyzing trace with hash 2015415447, now seen corresponding path program 1 times [2022-11-20 20:14:53,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:14:53,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794566085] [2022-11-20 20:14:53,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:14:53,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:14:53,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:14:53,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:14:53,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:14:53,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794566085] [2022-11-20 20:14:53,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794566085] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:14:53,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:14:53,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 20:14:53,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527986084] [2022-11-20 20:14:53,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:14:53,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 20:14:53,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:14:53,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 20:14:53,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:14:53,439 INFO L87 Difference]: Start difference. First operand 12600 states and 20109 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) [2022-11-20 20:14:56,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:14:56,503 INFO L93 Difference]: Finished difference Result 24713 states and 39639 transitions. [2022-11-20 20:14:56,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 20:14:56,503 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 [2022-11-20 20:14:56,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:14:56,567 INFO L225 Difference]: With dead ends: 24713 [2022-11-20 20:14:56,567 INFO L226 Difference]: Without dead ends: 13740 [2022-11-20 20:14:56,604 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 [2022-11-20 20:14:56,604 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 999 mSDsluCounter, 1283 mSDsCounter, 0 mSdLazyCounter, 2529 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1075 SdHoareTripleChecker+Valid, 1675 SdHoareTripleChecker+Invalid, 2931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 2529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:14:56,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1075 Valid, 1675 Invalid, 2931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 2529 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-20 20:14:56,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13740 states. [2022-11-20 20:14:57,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13740 to 12786. [2022-11-20 20:14:57,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12786 states, 9099 states have (on average 1.5266512803604793) internal successors, (13891), 9570 states have internal predecessors, (13891), 2858 states have call successors, (2858), 597 states have call predecessors, (2858), 828 states have return successors, (3594), 2849 states have call predecessors, (3594), 2853 states have call successors, (3594) [2022-11-20 20:14:57,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12786 states to 12786 states and 20343 transitions. [2022-11-20 20:14:57,572 INFO L78 Accepts]: Start accepts. Automaton has 12786 states and 20343 transitions. Word has length 92 [2022-11-20 20:14:57,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:14:57,572 INFO L495 AbstractCegarLoop]: Abstraction has 12786 states and 20343 transitions. [2022-11-20 20:14:57,573 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) [2022-11-20 20:14:57,573 INFO L276 IsEmpty]: Start isEmpty. Operand 12786 states and 20343 transitions. [2022-11-20 20:14:57,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-20 20:14:57,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:14:57,576 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] [2022-11-20 20:14:57,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 20:14:57,577 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:14:57,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:14:57,577 INFO L85 PathProgramCache]: Analyzing trace with hash 2078917078, now seen corresponding path program 1 times [2022-11-20 20:14:57,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:14:57,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749495401] [2022-11-20 20:14:57,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:14:57,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:14:57,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:14:57,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 20:14:57,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:14:57,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749495401] [2022-11-20 20:14:57,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749495401] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:14:57,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:14:57,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 20:14:57,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565494918] [2022-11-20 20:14:57,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:14:57,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:14:57,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:14:57,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:14:57,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:14:57,834 INFO L87 Difference]: Start difference. First operand 12786 states and 20343 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) [2022-11-20 20:14:59,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:14:59,519 INFO L93 Difference]: Finished difference Result 12912 states and 20552 transitions. [2022-11-20 20:14:59,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:14:59,520 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 [2022-11-20 20:14:59,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:14:59,591 INFO L225 Difference]: With dead ends: 12912 [2022-11-20 20:14:59,591 INFO L226 Difference]: Without dead ends: 12897 [2022-11-20 20:14:59,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:14:59,604 INFO L413 NwaCegarLoop]: 559 mSDtfsCounter, 690 mSDsluCounter, 1289 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 1848 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:14:59,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 1848 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 20:14:59,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12897 states. [2022-11-20 20:15:00,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12897 to 12794. [2022-11-20 20:15:00,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12794 states, 9107 states have (on average 1.5261886460964094) internal successors, (13899), 9578 states have internal predecessors, (13899), 2858 states have call successors, (2858), 597 states have call predecessors, (2858), 828 states have return successors, (3594), 2849 states have call predecessors, (3594), 2853 states have call successors, (3594) [2022-11-20 20:15:01,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12794 states to 12794 states and 20351 transitions. [2022-11-20 20:15:01,044 INFO L78 Accepts]: Start accepts. Automaton has 12794 states and 20351 transitions. Word has length 95 [2022-11-20 20:15:01,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:01,045 INFO L495 AbstractCegarLoop]: Abstraction has 12794 states and 20351 transitions. [2022-11-20 20:15:01,045 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) [2022-11-20 20:15:01,045 INFO L276 IsEmpty]: Start isEmpty. Operand 12794 states and 20351 transitions. [2022-11-20 20:15:01,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-20 20:15:01,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:01,049 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] [2022-11-20 20:15:01,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 20:15:01,050 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:15:01,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:01,050 INFO L85 PathProgramCache]: Analyzing trace with hash 183572998, now seen corresponding path program 1 times [2022-11-20 20:15:01,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:01,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303898629] [2022-11-20 20:15:01,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:01,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:01,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:01,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 20:15:01,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:01,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303898629] [2022-11-20 20:15:01,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303898629] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:01,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:01,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-20 20:15:01,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187526190] [2022-11-20 20:15:01,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:01,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 20:15:01,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:01,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 20:15:01,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:15:01,651 INFO L87 Difference]: Start difference. First operand 12794 states and 20351 transitions. Second operand has 13 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 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) [2022-11-20 20:15:08,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:08,074 INFO L93 Difference]: Finished difference Result 13914 states and 22096 transitions. [2022-11-20 20:15:08,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-20 20:15:08,075 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 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 100 [2022-11-20 20:15:08,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:08,141 INFO L225 Difference]: With dead ends: 13914 [2022-11-20 20:15:08,141 INFO L226 Difference]: Without dead ends: 13897 [2022-11-20 20:15:08,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2022-11-20 20:15:08,152 INFO L413 NwaCegarLoop]: 555 mSDtfsCounter, 2741 mSDsluCounter, 3398 mSDsCounter, 0 mSdLazyCounter, 7806 mSolverCounterSat, 1542 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2767 SdHoareTripleChecker+Valid, 3953 SdHoareTripleChecker+Invalid, 9348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1542 IncrementalHoareTripleChecker+Valid, 7806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:08,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2767 Valid, 3953 Invalid, 9348 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1542 Valid, 7806 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-11-20 20:15:08,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13897 states. [2022-11-20 20:15:09,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13897 to 13366. [2022-11-20 20:15:09,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13366 states, 9561 states have (on average 1.5323710908900743) internal successors, (14651), 10028 states have internal predecessors, (14651), 2894 states have call successors, (2894), 680 states have call predecessors, (2894), 910 states have return successors, (3641), 2888 states have call predecessors, (3641), 2889 states have call successors, (3641) [2022-11-20 20:15:09,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13366 states to 13366 states and 21186 transitions. [2022-11-20 20:15:09,318 INFO L78 Accepts]: Start accepts. Automaton has 13366 states and 21186 transitions. Word has length 100 [2022-11-20 20:15:09,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:09,319 INFO L495 AbstractCegarLoop]: Abstraction has 13366 states and 21186 transitions. [2022-11-20 20:15:09,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 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) [2022-11-20 20:15:09,319 INFO L276 IsEmpty]: Start isEmpty. Operand 13366 states and 21186 transitions. [2022-11-20 20:15:09,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-20 20:15:09,323 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:09,323 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] [2022-11-20 20:15:09,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 20:15:09,324 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:15:09,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:09,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1917965188, now seen corresponding path program 1 times [2022-11-20 20:15:09,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:09,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000076241] [2022-11-20 20:15:09,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:09,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:09,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:09,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:15:09,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:09,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000076241] [2022-11-20 20:15:09,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000076241] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:09,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:09,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:15:09,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434751352] [2022-11-20 20:15:09,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:09,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:15:09,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:09,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:15:09,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:15:09,695 INFO L87 Difference]: Start difference. First operand 13366 states and 21186 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) [2022-11-20 20:15:13,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:13,162 INFO L93 Difference]: Finished difference Result 38666 states and 62083 transitions. [2022-11-20 20:15:13,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:15:13,163 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 [2022-11-20 20:15:13,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:13,331 INFO L225 Difference]: With dead ends: 38666 [2022-11-20 20:15:13,331 INFO L226 Difference]: Without dead ends: 25323 [2022-11-20 20:15:13,411 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 [2022-11-20 20:15:13,412 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 1177 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1248 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 1323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:13,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1248 Valid, 732 Invalid, 1323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-20 20:15:13,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25323 states. [2022-11-20 20:15:15,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25323 to 23453. [2022-11-20 20:15:15,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23453 states, 16817 states have (on average 1.5307129690194445) internal successors, (25742), 17721 states have internal predecessors, (25742), 4990 states have call successors, (4990), 1184 states have call predecessors, (4990), 1645 states have return successors, (6618), 4869 states have call predecessors, (6618), 4985 states have call successors, (6618) [2022-11-20 20:15:15,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23453 states to 23453 states and 37350 transitions. [2022-11-20 20:15:15,848 INFO L78 Accepts]: Start accepts. Automaton has 23453 states and 37350 transitions. Word has length 108 [2022-11-20 20:15:15,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:15,848 INFO L495 AbstractCegarLoop]: Abstraction has 23453 states and 37350 transitions. [2022-11-20 20:15:15,849 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) [2022-11-20 20:15:15,849 INFO L276 IsEmpty]: Start isEmpty. Operand 23453 states and 37350 transitions. [2022-11-20 20:15:15,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-20 20:15:15,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:15,852 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] [2022-11-20 20:15:15,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 20:15:15,853 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:15:15,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:15,853 INFO L85 PathProgramCache]: Analyzing trace with hash -672763417, now seen corresponding path program 1 times [2022-11-20 20:15:15,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:15,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436559569] [2022-11-20 20:15:15,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:15,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:15,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:16,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:15:16,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:16,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436559569] [2022-11-20 20:15:16,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436559569] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:16,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:16,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:15:16,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917320427] [2022-11-20 20:15:16,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:16,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:15:16,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:16,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:15:16,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:15:16,111 INFO L87 Difference]: Start difference. First operand 23453 states and 37350 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) [2022-11-20 20:15:21,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:21,606 INFO L93 Difference]: Finished difference Result 68085 states and 110452 transitions. [2022-11-20 20:15:21,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:15:21,606 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 [2022-11-20 20:15:21,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:21,841 INFO L225 Difference]: With dead ends: 68085 [2022-11-20 20:15:21,842 INFO L226 Difference]: Without dead ends: 44658 [2022-11-20 20:15:21,950 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 [2022-11-20 20:15:21,951 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 1162 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:21,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1232 Valid, 741 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-20 20:15:21,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44658 states. [2022-11-20 20:15:25,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44658 to 42312. [2022-11-20 20:15:25,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42312 states, 30434 states have (on average 1.5290464611947165) internal successors, (46535), 32283 states have internal predecessors, (46535), 8751 states have call successors, (8751), 2192 states have call predecessors, (8751), 3126 states have return successors, (12635), 8389 states have call predecessors, (12635), 8746 states have call successors, (12635) [2022-11-20 20:15:25,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42312 states to 42312 states and 67921 transitions. [2022-11-20 20:15:25,981 INFO L78 Accepts]: Start accepts. Automaton has 42312 states and 67921 transitions. Word has length 109 [2022-11-20 20:15:25,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:25,982 INFO L495 AbstractCegarLoop]: Abstraction has 42312 states and 67921 transitions. [2022-11-20 20:15:25,983 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) [2022-11-20 20:15:25,983 INFO L276 IsEmpty]: Start isEmpty. Operand 42312 states and 67921 transitions. [2022-11-20 20:15:25,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-20 20:15:25,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:25,988 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] [2022-11-20 20:15:25,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 20:15:25,988 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:15:25,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:25,989 INFO L85 PathProgramCache]: Analyzing trace with hash 619032358, now seen corresponding path program 1 times [2022-11-20 20:15:25,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:25,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187743374] [2022-11-20 20:15:25,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:25,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:26,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:26,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:15:26,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:26,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187743374] [2022-11-20 20:15:26,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187743374] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:26,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:26,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:15:26,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240185321] [2022-11-20 20:15:26,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:26,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:15:26,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:26,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:15:26,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:15:26,301 INFO L87 Difference]: Start difference. First operand 42312 states and 67921 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) [2022-11-20 20:15:35,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:35,288 INFO L93 Difference]: Finished difference Result 125052 states and 207047 transitions. [2022-11-20 20:15:35,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:15:35,289 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 [2022-11-20 20:15:35,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:35,750 INFO L225 Difference]: With dead ends: 125052 [2022-11-20 20:15:35,751 INFO L226 Difference]: Without dead ends: 82772 [2022-11-20 20:15:36,127 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 [2022-11-20 20:15:36,128 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 1150 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 371 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1219 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:36,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1219 Valid, 750 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [371 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-20 20:15:36,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82772 states.