./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8090ac1e7e8284dad30217492085f9e11f6491349a4adb4aa3c2904a72e0131a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 16:09:28,598 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 16:09:28,600 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 16:09:28,617 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 16:09:28,618 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 16:09:28,619 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 16:09:28,620 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 16:09:28,622 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 16:09:28,623 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 16:09:28,624 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 16:09:28,625 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 16:09:28,626 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 16:09:28,626 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 16:09:28,627 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 16:09:28,628 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 16:09:28,629 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 16:09:28,630 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 16:09:28,631 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 16:09:28,632 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 16:09:28,634 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 16:09:28,635 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 16:09:28,636 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 16:09:28,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 16:09:28,638 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 16:09:28,641 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 16:09:28,642 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 16:09:28,642 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 16:09:28,643 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 16:09:28,643 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 16:09:28,644 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 16:09:28,644 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 16:09:28,645 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 16:09:28,646 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 16:09:28,646 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 16:09:28,647 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 16:09:28,647 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 16:09:28,648 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 16:09:28,648 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 16:09:28,648 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 16:09:28,649 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 16:09:28,649 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 16:09:28,650 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 16:09:28,671 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 16:09:28,671 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 16:09:28,671 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 16:09:28,671 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 16:09:28,672 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 16:09:28,672 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 16:09:28,672 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 16:09:28,673 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 16:09:28,673 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 16:09:28,673 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 16:09:28,673 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 16:09:28,673 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 16:09:28,673 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 16:09:28,673 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 16:09:28,674 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 16:09:28,674 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 16:09:28,674 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 16:09:28,674 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 16:09:28,675 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 16:09:28,675 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 16:09:28,675 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 16:09:28,675 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 16:09:28,675 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 16:09:28,676 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 16:09:28,676 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 16:09:28,676 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 16:09:28,676 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 16:09:28,676 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 16:09:28,676 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 16:09:28,677 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 16:09:28,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 16:09:28,677 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 16:09:28,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 16:09:28,677 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 16:09:28,677 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 16:09:28,678 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 16:09:28,678 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 16:09:28,678 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 16:09:28,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 16:09:28,678 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 16:09:28,678 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 16:09:28,678 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_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8090ac1e7e8284dad30217492085f9e11f6491349a4adb4aa3c2904a72e0131a [2022-12-14 16:09:28,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 16:09:28,898 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 16:09:28,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 16:09:28,902 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 16:09:28,902 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 16:09:28,903 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c [2022-12-14 16:09:31,460 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 16:09:31,724 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 16:09:31,725 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c [2022-12-14 16:09:31,740 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh/data/df6f929e2/8d2ba85014e64079b25b8ab4f9387235/FLAG000510344 [2022-12-14 16:09:32,027 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh/data/df6f929e2/8d2ba85014e64079b25b8ab4f9387235 [2022-12-14 16:09:32,029 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 16:09:32,030 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 16:09:32,031 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 16:09:32,031 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 16:09:32,034 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 16:09:32,034 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:09:32" (1/1) ... [2022-12-14 16:09:32,035 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@589b4ec4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:09:32, skipping insertion in model container [2022-12-14 16:09:32,035 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:09:32" (1/1) ... [2022-12-14 16:09:32,040 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 16:09:32,095 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 16:09:32,217 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_b8f44863-c436-42aa-ba9d-36ba24d923ef/sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c[1545,1558] [2022-12-14 16:09:32,477 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 16:09:32,488 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 16:09:32,500 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_b8f44863-c436-42aa-ba9d-36ba24d923ef/sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c[1545,1558] [2022-12-14 16:09:32,576 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 16:09:32,600 INFO L208 MainTranslator]: Completed translation [2022-12-14 16:09:32,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:09:32 WrapperNode [2022-12-14 16:09:32,600 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 16:09:32,601 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 16:09:32,601 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 16:09:32,601 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 16:09:32,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:09:32" (1/1) ... [2022-12-14 16:09:32,632 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:09:32" (1/1) ... [2022-12-14 16:09:32,664 INFO L138 Inliner]: procedures = 94, calls = 345, calls flagged for inlining = 26, calls inlined = 22, statements flattened = 876 [2022-12-14 16:09:32,665 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 16:09:32,665 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 16:09:32,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 16:09:32,665 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 16:09:32,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:09:32" (1/1) ... [2022-12-14 16:09:32,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:09:32" (1/1) ... [2022-12-14 16:09:32,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:09:32" (1/1) ... [2022-12-14 16:09:32,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:09:32" (1/1) ... [2022-12-14 16:09:32,689 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:09:32" (1/1) ... [2022-12-14 16:09:32,697 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:09:32" (1/1) ... [2022-12-14 16:09:32,700 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:09:32" (1/1) ... [2022-12-14 16:09:32,703 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:09:32" (1/1) ... [2022-12-14 16:09:32,708 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 16:09:32,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 16:09:32,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 16:09:32,709 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 16:09:32,710 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:09:32" (1/1) ... [2022-12-14 16:09:32,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 16:09:32,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:09:32,740 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 16:09:32,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 16:09:32,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 16:09:32,777 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-12-14 16:09:32,777 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-12-14 16:09:32,777 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-12-14 16:09:32,777 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-12-14 16:09:32,777 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 16:09:32,777 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 16:09:32,777 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 16:09:32,778 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 16:09:32,778 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 16:09:32,778 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 16:09:32,778 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 16:09:32,778 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 16:09:32,778 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 16:09:32,778 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 16:09:32,779 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-12-14 16:09:32,779 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-12-14 16:09:32,779 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 16:09:32,779 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 16:09:32,779 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 16:09:32,779 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 16:09:32,779 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 16:09:32,779 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 16:09:32,780 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 16:09:32,780 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 16:09:32,780 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-12-14 16:09:32,780 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-12-14 16:09:32,780 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 16:09:32,780 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 16:09:32,780 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 16:09:32,781 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 16:09:32,781 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 16:09:32,781 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 16:09:32,781 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 16:09:32,781 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 16:09:32,781 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 16:09:32,781 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 16:09:32,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 16:09:32,782 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-12-14 16:09:32,782 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-12-14 16:09:32,782 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 16:09:32,782 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 16:09:32,782 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 16:09:32,782 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 16:09:32,783 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 16:09:32,783 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 16:09:32,783 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2022-12-14 16:09:32,783 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2022-12-14 16:09:32,783 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2022-12-14 16:09:32,783 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2022-12-14 16:09:32,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 16:09:32,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 16:09:32,784 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 16:09:32,784 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 16:09:32,901 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 16:09:32,904 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 16:09:33,661 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 16:09:34,156 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 16:09:34,156 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 16:09:34,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:09:34 BoogieIcfgContainer [2022-12-14 16:09:34,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 16:09:34,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 16:09:34,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 16:09:34,164 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 16:09:34,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:09:32" (1/3) ... [2022-12-14 16:09:34,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62a17f9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:09:34, skipping insertion in model container [2022-12-14 16:09:34,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:09:32" (2/3) ... [2022-12-14 16:09:34,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62a17f9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:09:34, skipping insertion in model container [2022-12-14 16:09:34,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:09:34" (3/3) ... [2022-12-14 16:09:34,167 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product22.cil.c [2022-12-14 16:09:34,183 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 16:09:34,183 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 16:09:34,231 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 16:09:34,237 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;@7a012268, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 16:09:34,237 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 16:09:34,243 INFO L276 IsEmpty]: Start isEmpty. Operand has 383 states, 258 states have (on average 1.5930232558139534) internal successors, (411), 281 states have internal predecessors, (411), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 91 states have call predecessors, (98), 98 states have call successors, (98) [2022-12-14 16:09:34,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 16:09:34,259 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:09:34,260 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:09:34,260 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:09:34,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:09:34,265 INFO L85 PathProgramCache]: Analyzing trace with hash -260150471, now seen corresponding path program 1 times [2022-12-14 16:09:34,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:09:34,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582614654] [2022-12-14 16:09:34,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:09:34,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:09:34,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:09:34,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:09:34,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:09:34,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582614654] [2022-12-14 16:09:34,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582614654] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:09:34,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:09:34,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 16:09:34,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498772134] [2022-12-14 16:09:34,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:09:34,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 16:09:34,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:09:34,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 16:09:34,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 16:09:34,661 INFO L87 Difference]: Start difference. First operand has 383 states, 258 states have (on average 1.5930232558139534) internal successors, (411), 281 states have internal predecessors, (411), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 91 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 16:09:34,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:09:34,795 INFO L93 Difference]: Finished difference Result 401 states and 634 transitions. [2022-12-14 16:09:34,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 16:09:34,797 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2022-12-14 16:09:34,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:09:34,810 INFO L225 Difference]: With dead ends: 401 [2022-12-14 16:09:34,810 INFO L226 Difference]: Without dead ends: 379 [2022-12-14 16:09:34,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 16:09:34,816 INFO L413 NwaCegarLoop]: 563 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 16:09:34,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 563 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 16:09:34,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-12-14 16:09:34,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2022-12-14 16:09:34,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 256 states have (on average 1.58203125) internal successors, (405), 277 states have internal predecessors, (405), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 90 states have call predecessors, (93), 93 states have call successors, (93) [2022-12-14 16:09:34,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 596 transitions. [2022-12-14 16:09:34,884 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 596 transitions. Word has length 43 [2022-12-14 16:09:34,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:09:34,885 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 596 transitions. [2022-12-14 16:09:34,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 16:09:34,886 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 596 transitions. [2022-12-14 16:09:34,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 16:09:34,889 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:09:34,890 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:09:34,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 16:09:34,890 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:09:34,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:09:34,891 INFO L85 PathProgramCache]: Analyzing trace with hash -504960938, now seen corresponding path program 1 times [2022-12-14 16:09:34,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:09:34,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004287990] [2022-12-14 16:09:34,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:09:34,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:09:34,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:09:35,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:09:35,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:09:35,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004287990] [2022-12-14 16:09:35,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004287990] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:09:35,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:09:35,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 16:09:35,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737385318] [2022-12-14 16:09:35,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:09:35,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 16:09:35,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:09:35,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 16:09:35,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 16:09:35,286 INFO L87 Difference]: Start difference. First operand 379 states and 596 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-14 16:09:36,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:09:36,751 INFO L93 Difference]: Finished difference Result 1243 states and 1996 transitions. [2022-12-14 16:09:36,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 16:09:36,752 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 44 [2022-12-14 16:09:36,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:09:36,760 INFO L225 Difference]: With dead ends: 1243 [2022-12-14 16:09:36,760 INFO L226 Difference]: Without dead ends: 880 [2022-12-14 16:09:36,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-12-14 16:09:36,765 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 1615 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 1559 mSolverCounterSat, 609 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1682 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 2168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 609 IncrementalHoareTripleChecker+Valid, 1559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 16:09:36,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1682 Valid, 985 Invalid, 2168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [609 Valid, 1559 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 16:09:36,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-12-14 16:09:36,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 793. [2022-12-14 16:09:36,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 558 states have (on average 1.603942652329749) internal successors, (895), 588 states have internal predecessors, (895), 190 states have call successors, (190), 43 states have call predecessors, (190), 44 states have return successors, (192), 174 states have call predecessors, (192), 185 states have call successors, (192) [2022-12-14 16:09:36,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1277 transitions. [2022-12-14 16:09:36,844 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1277 transitions. Word has length 44 [2022-12-14 16:09:36,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:09:36,844 INFO L495 AbstractCegarLoop]: Abstraction has 793 states and 1277 transitions. [2022-12-14 16:09:36,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-14 16:09:36,845 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1277 transitions. [2022-12-14 16:09:36,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-14 16:09:36,849 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:09:36,850 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:09:36,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 16:09:36,850 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:09:36,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:09:36,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1006056301, now seen corresponding path program 1 times [2022-12-14 16:09:36,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:09:36,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065752058] [2022-12-14 16:09:36,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:09:36,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:09:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:09:37,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:09:37,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:09:37,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065752058] [2022-12-14 16:09:37,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065752058] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:09:37,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:09:37,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-12-14 16:09:37,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141253992] [2022-12-14 16:09:37,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:09:37,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 16:09:37,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:09:37,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 16:09:37,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-12-14 16:09:37,318 INFO L87 Difference]: Start difference. First operand 793 states and 1277 transitions. Second operand has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 6 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2022-12-14 16:09:40,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:09:40,814 INFO L93 Difference]: Finished difference Result 3318 states and 5440 transitions. [2022-12-14 16:09:40,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-14 16:09:40,814 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 6 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 76 [2022-12-14 16:09:40,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:09:40,824 INFO L225 Difference]: With dead ends: 3318 [2022-12-14 16:09:40,824 INFO L226 Difference]: Without dead ends: 2541 [2022-12-14 16:09:40,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=1400, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 16:09:40,829 INFO L413 NwaCegarLoop]: 569 mSDtfsCounter, 2569 mSDsluCounter, 3631 mSDsCounter, 0 mSdLazyCounter, 7957 mSolverCounterSat, 2158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2601 SdHoareTripleChecker+Valid, 4200 SdHoareTripleChecker+Invalid, 10115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2158 IncrementalHoareTripleChecker+Valid, 7957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:09:40,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2601 Valid, 4200 Invalid, 10115 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2158 Valid, 7957 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-12-14 16:09:40,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2022-12-14 16:09:40,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 1799. [2022-12-14 16:09:40,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1799 states, 1233 states have (on average 1.5660989456609895) internal successors, (1931), 1305 states have internal predecessors, (1931), 471 states have call successors, (471), 82 states have call predecessors, (471), 94 states have return successors, (490), 444 states have call predecessors, (490), 466 states have call successors, (490) [2022-12-14 16:09:40,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1799 states to 1799 states and 2892 transitions. [2022-12-14 16:09:40,947 INFO L78 Accepts]: Start accepts. Automaton has 1799 states and 2892 transitions. Word has length 76 [2022-12-14 16:09:40,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:09:40,948 INFO L495 AbstractCegarLoop]: Abstraction has 1799 states and 2892 transitions. [2022-12-14 16:09:40,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 6 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2022-12-14 16:09:40,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1799 states and 2892 transitions. [2022-12-14 16:09:40,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-14 16:09:40,952 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:09:40,952 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:09:40,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 16:09:40,952 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:09:40,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:09:40,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1066490649, now seen corresponding path program 1 times [2022-12-14 16:09:40,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:09:40,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198563741] [2022-12-14 16:09:40,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:09:40,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:09:40,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:09:41,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 16:09:41,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:09:41,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198563741] [2022-12-14 16:09:41,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198563741] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:09:41,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:09:41,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-14 16:09:41,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050503663] [2022-12-14 16:09:41,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:09:41,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 16:09:41,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:09:41,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 16:09:41,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-14 16:09:41,276 INFO L87 Difference]: Start difference. First operand 1799 states and 2892 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 6 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-12-14 16:09:43,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:09:43,318 INFO L93 Difference]: Finished difference Result 5054 states and 8153 transitions. [2022-12-14 16:09:43,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 16:09:43,318 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 6 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 78 [2022-12-14 16:09:43,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:09:43,331 INFO L225 Difference]: With dead ends: 5054 [2022-12-14 16:09:43,331 INFO L226 Difference]: Without dead ends: 3273 [2022-12-14 16:09:43,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-12-14 16:09:43,339 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 1745 mSDsluCounter, 2203 mSDsCounter, 0 mSdLazyCounter, 3974 mSolverCounterSat, 595 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1811 SdHoareTripleChecker+Valid, 2613 SdHoareTripleChecker+Invalid, 4569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 595 IncrementalHoareTripleChecker+Valid, 3974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 16:09:43,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1811 Valid, 2613 Invalid, 4569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [595 Valid, 3974 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 16:09:43,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2022-12-14 16:09:43,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 3111. [2022-12-14 16:09:43,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3111 states, 2207 states have (on average 1.5894879927503398) internal successors, (3508), 2298 states have internal predecessors, (3508), 729 states have call successors, (729), 144 states have call predecessors, (729), 174 states have return successors, (792), 712 states have call predecessors, (792), 724 states have call successors, (792) [2022-12-14 16:09:43,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3111 states to 3111 states and 5029 transitions. [2022-12-14 16:09:43,557 INFO L78 Accepts]: Start accepts. Automaton has 3111 states and 5029 transitions. Word has length 78 [2022-12-14 16:09:43,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:09:43,558 INFO L495 AbstractCegarLoop]: Abstraction has 3111 states and 5029 transitions. [2022-12-14 16:09:43,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 6 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-12-14 16:09:43,558 INFO L276 IsEmpty]: Start isEmpty. Operand 3111 states and 5029 transitions. [2022-12-14 16:09:43,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-14 16:09:43,561 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:09:43,561 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:09:43,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 16:09:43,561 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:09:43,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:09:43,562 INFO L85 PathProgramCache]: Analyzing trace with hash 812966193, now seen corresponding path program 1 times [2022-12-14 16:09:43,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:09:43,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627823986] [2022-12-14 16:09:43,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:09:43,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:09:43,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:09:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 16:09:44,372 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:09:44,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627823986] [2022-12-14 16:09:44,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627823986] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:09:44,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:09:44,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 16:09:44,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821445794] [2022-12-14 16:09:44,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:09:44,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 16:09:44,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:09:44,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 16:09:44,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:09:44,374 INFO L87 Difference]: Start difference. First operand 3111 states and 5029 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-12-14 16:09:47,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:09:47,164 INFO L93 Difference]: Finished difference Result 9990 states and 16314 transitions. [2022-12-14 16:09:47,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 16:09:47,165 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 83 [2022-12-14 16:09:47,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:09:47,187 INFO L225 Difference]: With dead ends: 9990 [2022-12-14 16:09:47,187 INFO L226 Difference]: Without dead ends: 6897 [2022-12-14 16:09:47,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-12-14 16:09:47,198 INFO L413 NwaCegarLoop]: 543 mSDtfsCounter, 2595 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 2724 mSolverCounterSat, 1203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2667 SdHoareTripleChecker+Valid, 1478 SdHoareTripleChecker+Invalid, 3927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1203 IncrementalHoareTripleChecker+Valid, 2724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 16:09:47,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2667 Valid, 1478 Invalid, 3927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1203 Valid, 2724 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-14 16:09:47,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6897 states. [2022-12-14 16:09:47,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6897 to 6256. [2022-12-14 16:09:47,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6256 states, 4428 states have (on average 1.5679765130984644) internal successors, (6943), 4643 states have internal predecessors, (6943), 1472 states have call successors, (1472), 292 states have call predecessors, (1472), 355 states have return successors, (1643), 1432 states have call predecessors, (1643), 1467 states have call successors, (1643) [2022-12-14 16:09:47,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6256 states to 6256 states and 10058 transitions. [2022-12-14 16:09:47,779 INFO L78 Accepts]: Start accepts. Automaton has 6256 states and 10058 transitions. Word has length 83 [2022-12-14 16:09:47,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:09:47,779 INFO L495 AbstractCegarLoop]: Abstraction has 6256 states and 10058 transitions. [2022-12-14 16:09:47,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-12-14 16:09:47,779 INFO L276 IsEmpty]: Start isEmpty. Operand 6256 states and 10058 transitions. [2022-12-14 16:09:47,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-14 16:09:47,781 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:09:47,781 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:09:47,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 16:09:47,781 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:09:47,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:09:47,782 INFO L85 PathProgramCache]: Analyzing trace with hash 931378961, now seen corresponding path program 1 times [2022-12-14 16:09:47,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:09:47,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919496088] [2022-12-14 16:09:47,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:09:47,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:09:47,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:09:47,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 16:09:47,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:09:47,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919496088] [2022-12-14 16:09:47,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919496088] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:09:47,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:09:47,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 16:09:47,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35033480] [2022-12-14 16:09:47,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:09:47,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 16:09:47,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:09:47,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 16:09:47,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:09:47,970 INFO L87 Difference]: Start difference. First operand 6256 states and 10058 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 16:09:48,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:09:48,575 INFO L93 Difference]: Finished difference Result 11165 states and 17963 transitions. [2022-12-14 16:09:48,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 16:09:48,576 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 83 [2022-12-14 16:09:48,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:09:48,599 INFO L225 Difference]: With dead ends: 11165 [2022-12-14 16:09:48,599 INFO L226 Difference]: Without dead ends: 6480 [2022-12-14 16:09:48,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:09:48,612 INFO L413 NwaCegarLoop]: 566 mSDtfsCounter, 6 mSDsluCounter, 2784 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3350 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 16:09:48,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 3350 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 16:09:48,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6480 states. [2022-12-14 16:09:49,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6480 to 6411. [2022-12-14 16:09:49,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6411 states, 4537 states have (on average 1.5543310557637204) internal successors, (7052), 4755 states have internal predecessors, (7052), 1472 states have call successors, (1472), 292 states have call predecessors, (1472), 401 states have return successors, (1740), 1475 states have call predecessors, (1740), 1467 states have call successors, (1740) [2022-12-14 16:09:49,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6411 states to 6411 states and 10264 transitions. [2022-12-14 16:09:49,112 INFO L78 Accepts]: Start accepts. Automaton has 6411 states and 10264 transitions. Word has length 83 [2022-12-14 16:09:49,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:09:49,112 INFO L495 AbstractCegarLoop]: Abstraction has 6411 states and 10264 transitions. [2022-12-14 16:09:49,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 16:09:49,112 INFO L276 IsEmpty]: Start isEmpty. Operand 6411 states and 10264 transitions. [2022-12-14 16:09:49,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-14 16:09:49,114 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:09:49,114 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:09:49,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 16:09:49,115 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:09:49,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:09:49,115 INFO L85 PathProgramCache]: Analyzing trace with hash 303380405, now seen corresponding path program 1 times [2022-12-14 16:09:49,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:09:49,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467712426] [2022-12-14 16:09:49,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:09:49,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:09:49,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:09:49,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 16:09:49,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:09:49,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467712426] [2022-12-14 16:09:49,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467712426] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:09:49,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:09:49,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 16:09:49,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523393482] [2022-12-14 16:09:49,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:09:49,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 16:09:49,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:09:49,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 16:09:49,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:09:49,301 INFO L87 Difference]: Start difference. First operand 6411 states and 10264 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 16:09:49,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:09:49,855 INFO L93 Difference]: Finished difference Result 11396 states and 18254 transitions. [2022-12-14 16:09:49,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 16:09:49,855 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 82 [2022-12-14 16:09:49,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:09:49,879 INFO L225 Difference]: With dead ends: 11396 [2022-12-14 16:09:49,880 INFO L226 Difference]: Without dead ends: 6589 [2022-12-14 16:09:49,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:09:49,893 INFO L413 NwaCegarLoop]: 561 mSDtfsCounter, 7 mSDsluCounter, 2765 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 16:09:49,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 3326 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 16:09:49,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6589 states. [2022-12-14 16:09:50,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6589 to 6434. [2022-12-14 16:09:50,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6434 states, 4560 states have (on average 1.5515350877192982) internal successors, (7075), 4755 states have internal predecessors, (7075), 1472 states have call successors, (1472), 292 states have call predecessors, (1472), 401 states have return successors, (1740), 1498 states have call predecessors, (1740), 1467 states have call successors, (1740) [2022-12-14 16:09:50,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6434 states to 6434 states and 10287 transitions. [2022-12-14 16:09:50,309 INFO L78 Accepts]: Start accepts. Automaton has 6434 states and 10287 transitions. Word has length 82 [2022-12-14 16:09:50,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:09:50,309 INFO L495 AbstractCegarLoop]: Abstraction has 6434 states and 10287 transitions. [2022-12-14 16:09:50,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 16:09:50,310 INFO L276 IsEmpty]: Start isEmpty. Operand 6434 states and 10287 transitions. [2022-12-14 16:09:50,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-12-14 16:09:50,311 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:09:50,311 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:09:50,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 16:09:50,311 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:09:50,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:09:50,312 INFO L85 PathProgramCache]: Analyzing trace with hash 593634466, now seen corresponding path program 1 times [2022-12-14 16:09:50,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:09:50,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503104809] [2022-12-14 16:09:50,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:09:50,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:09:50,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:09:50,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 16:09:50,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:09:50,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503104809] [2022-12-14 16:09:50,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503104809] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:09:50,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:09:50,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 16:09:50,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911767654] [2022-12-14 16:09:50,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:09:50,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 16:09:50,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:09:50,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 16:09:50,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-14 16:09:50,495 INFO L87 Difference]: Start difference. First operand 6434 states and 10287 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) [2022-12-14 16:09:52,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:09:52,875 INFO L93 Difference]: Finished difference Result 16111 states and 26000 transitions. [2022-12-14 16:09:52,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 16:09:52,876 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) Word has length 90 [2022-12-14 16:09:52,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:09:52,907 INFO L225 Difference]: With dead ends: 16111 [2022-12-14 16:09:52,907 INFO L226 Difference]: Without dead ends: 10809 [2022-12-14 16:09:52,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-12-14 16:09:52,924 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 2038 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 2385 mSolverCounterSat, 864 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2203 SdHoareTripleChecker+Valid, 1473 SdHoareTripleChecker+Invalid, 3249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 864 IncrementalHoareTripleChecker+Valid, 2385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 16:09:52,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2203 Valid, 1473 Invalid, 3249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [864 Valid, 2385 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 16:09:52,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10809 states. [2022-12-14 16:09:53,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10809 to 10561. [2022-12-14 16:09:53,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10561 states, 7334 states have (on average 1.5169075538587402) internal successors, (11125), 7698 states have internal predecessors, (11125), 2526 states have call successors, (2526), 523 states have call predecessors, (2526), 700 states have return successors, (3057), 2535 states have call predecessors, (3057), 2521 states have call successors, (3057) [2022-12-14 16:09:53,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10561 states to 10561 states and 16708 transitions. [2022-12-14 16:09:53,826 INFO L78 Accepts]: Start accepts. Automaton has 10561 states and 16708 transitions. Word has length 90 [2022-12-14 16:09:53,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:09:53,826 INFO L495 AbstractCegarLoop]: Abstraction has 10561 states and 16708 transitions. [2022-12-14 16:09:53,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) [2022-12-14 16:09:53,827 INFO L276 IsEmpty]: Start isEmpty. Operand 10561 states and 16708 transitions. [2022-12-14 16:09:53,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-14 16:09:53,829 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:09:53,829 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:09:53,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 16:09:53,829 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:09:53,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:09:53,830 INFO L85 PathProgramCache]: Analyzing trace with hash 189416909, now seen corresponding path program 1 times [2022-12-14 16:09:53,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:09:53,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868761118] [2022-12-14 16:09:53,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:09:53,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:09:53,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:09:54,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 16:09:54,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:09:54,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868761118] [2022-12-14 16:09:54,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868761118] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:09:54,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:09:54,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 16:09:54,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928496876] [2022-12-14 16:09:54,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:09:54,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 16:09:54,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:09:54,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 16:09:54,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:09:54,078 INFO L87 Difference]: Start difference. First operand 10561 states and 16708 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-12-14 16:09:56,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:09:56,420 INFO L93 Difference]: Finished difference Result 20874 states and 33176 transitions. [2022-12-14 16:09:56,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 16:09:56,421 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 92 [2022-12-14 16:09:56,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:09:56,461 INFO L225 Difference]: With dead ends: 20874 [2022-12-14 16:09:56,461 INFO L226 Difference]: Without dead ends: 11746 [2022-12-14 16:09:56,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-14 16:09:56,481 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 1003 mSDsluCounter, 1274 mSDsCounter, 0 mSdLazyCounter, 2509 mSolverCounterSat, 403 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1079 SdHoareTripleChecker+Valid, 1663 SdHoareTripleChecker+Invalid, 2912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 2509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 16:09:56,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1079 Valid, 1663 Invalid, 2912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [403 Valid, 2509 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 16:09:56,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11746 states. [2022-12-14 16:09:57,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11746 to 10741. [2022-12-14 16:09:57,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10741 states, 7454 states have (on average 1.512342366514623) internal successors, (11273), 7846 states have internal predecessors, (11273), 2530 states have call successors, (2530), 555 states have call predecessors, (2530), 756 states have return successors, (3135), 2535 states have call predecessors, (3135), 2525 states have call successors, (3135) [2022-12-14 16:09:57,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10741 states to 10741 states and 16938 transitions. [2022-12-14 16:09:57,213 INFO L78 Accepts]: Start accepts. Automaton has 10741 states and 16938 transitions. Word has length 92 [2022-12-14 16:09:57,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:09:57,213 INFO L495 AbstractCegarLoop]: Abstraction has 10741 states and 16938 transitions. [2022-12-14 16:09:57,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-12-14 16:09:57,214 INFO L276 IsEmpty]: Start isEmpty. Operand 10741 states and 16938 transitions. [2022-12-14 16:09:57,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-12-14 16:09:57,216 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:09:57,216 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] [2022-12-14 16:09:57,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 16:09:57,216 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:09:57,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:09:57,216 INFO L85 PathProgramCache]: Analyzing trace with hash 601827105, now seen corresponding path program 1 times [2022-12-14 16:09:57,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:09:57,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699677286] [2022-12-14 16:09:57,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:09:57,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:09:57,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:09:57,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 16:09:57,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:09:57,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699677286] [2022-12-14 16:09:57,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699677286] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:09:57,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:09:57,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 16:09:57,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963319959] [2022-12-14 16:09:57,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:09:57,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 16:09:57,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:09:57,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 16:09:57,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 16:09:57,349 INFO L87 Difference]: Start difference. First operand 10741 states and 16938 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 16:09:58,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:09:58,471 INFO L93 Difference]: Finished difference Result 10877 states and 17154 transitions. [2022-12-14 16:09:58,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 16:09:58,472 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (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 96 [2022-12-14 16:09:58,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:09:58,506 INFO L225 Difference]: With dead ends: 10877 [2022-12-14 16:09:58,506 INFO L226 Difference]: Without dead ends: 10862 [2022-12-14 16:09:58,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-14 16:09:58,512 INFO L413 NwaCegarLoop]: 559 mSDtfsCounter, 660 mSDsluCounter, 1289 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 1848 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 16:09:58,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [661 Valid, 1848 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 16:09:58,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10862 states. [2022-12-14 16:09:59,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10862 to 10749. [2022-12-14 16:09:59,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10749 states, 7462 states have (on average 1.5117930849638166) internal successors, (11281), 7854 states have internal predecessors, (11281), 2530 states have call successors, (2530), 555 states have call predecessors, (2530), 756 states have return successors, (3135), 2535 states have call predecessors, (3135), 2525 states have call successors, (3135) [2022-12-14 16:09:59,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10749 states to 10749 states and 16946 transitions. [2022-12-14 16:09:59,488 INFO L78 Accepts]: Start accepts. Automaton has 10749 states and 16946 transitions. Word has length 96 [2022-12-14 16:09:59,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:09:59,488 INFO L495 AbstractCegarLoop]: Abstraction has 10749 states and 16946 transitions. [2022-12-14 16:09:59,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 16:09:59,489 INFO L276 IsEmpty]: Start isEmpty. Operand 10749 states and 16946 transitions. [2022-12-14 16:09:59,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 16:09:59,490 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:09:59,490 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:09:59,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 16:09:59,491 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:09:59,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:09:59,491 INFO L85 PathProgramCache]: Analyzing trace with hash -516015944, now seen corresponding path program 1 times [2022-12-14 16:09:59,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:09:59,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783276173] [2022-12-14 16:09:59,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:09:59,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:09:59,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:09:59,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 16:09:59,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:09:59,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783276173] [2022-12-14 16:09:59,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783276173] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:09:59,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:09:59,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-14 16:09:59,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167787461] [2022-12-14 16:09:59,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:09:59,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 16:09:59,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:09:59,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 16:09:59,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-12-14 16:09:59,797 INFO L87 Difference]: Start difference. First operand 10749 states and 16946 transitions. Second operand has 13 states, 11 states have (on average 5.818181818181818) internal successors, (64), 11 states have internal predecessors, (64), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-12-14 16:10:03,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:10:03,642 INFO L93 Difference]: Finished difference Result 11962 states and 18826 transitions. [2022-12-14 16:10:03,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-14 16:10:03,643 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 5.818181818181818) internal successors, (64), 11 states have internal predecessors, (64), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) Word has length 101 [2022-12-14 16:10:03,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:10:03,675 INFO L225 Difference]: With dead ends: 11962 [2022-12-14 16:10:03,675 INFO L226 Difference]: Without dead ends: 11945 [2022-12-14 16:10:03,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 16:10:03,680 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 2747 mSDsluCounter, 3379 mSDsCounter, 0 mSdLazyCounter, 7856 mSolverCounterSat, 1541 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2773 SdHoareTripleChecker+Valid, 3931 SdHoareTripleChecker+Invalid, 9397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1541 IncrementalHoareTripleChecker+Valid, 7856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-14 16:10:03,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2773 Valid, 3931 Invalid, 9397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1541 Valid, 7856 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-12-14 16:10:03,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11945 states. [2022-12-14 16:10:04,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11945 to 11391. [2022-12-14 16:10:04,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11391 states, 7967 states have (on average 1.5203966361240115) internal successors, (12113), 8355 states have internal predecessors, (12113), 2579 states have call successors, (2579), 644 states have call predecessors, (2579), 844 states have return successors, (3194), 2587 states have call predecessors, (3194), 2574 states have call successors, (3194) [2022-12-14 16:10:04,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11391 states to 11391 states and 17886 transitions. [2022-12-14 16:10:04,472 INFO L78 Accepts]: Start accepts. Automaton has 11391 states and 17886 transitions. Word has length 101 [2022-12-14 16:10:04,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:10:04,472 INFO L495 AbstractCegarLoop]: Abstraction has 11391 states and 17886 transitions. [2022-12-14 16:10:04,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 5.818181818181818) internal successors, (64), 11 states have internal predecessors, (64), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-12-14 16:10:04,473 INFO L276 IsEmpty]: Start isEmpty. Operand 11391 states and 17886 transitions. [2022-12-14 16:10:04,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 16:10:04,474 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:10:04,475 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:10:04,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 16:10:04,475 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:10:04,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:10:04,475 INFO L85 PathProgramCache]: Analyzing trace with hash -469890732, now seen corresponding path program 1 times [2022-12-14 16:10:04,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:10:04,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650441635] [2022-12-14 16:10:04,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:10:04,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:10:04,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:10:04,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 16:10:04,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:10:04,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650441635] [2022-12-14 16:10:04,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650441635] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:10:04,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:10:04,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 16:10:04,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771232388] [2022-12-14 16:10:04,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:10:04,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 16:10:04,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:10:04,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 16:10:04,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 16:10:04,608 INFO L87 Difference]: Start difference. First operand 11391 states and 17886 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-12-14 16:10:06,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:10:06,851 INFO L93 Difference]: Finished difference Result 29797 states and 47437 transitions. [2022-12-14 16:10:06,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 16:10:06,852 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 108 [2022-12-14 16:10:06,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:10:06,905 INFO L225 Difference]: With dead ends: 29797 [2022-12-14 16:10:06,905 INFO L226 Difference]: Without dead ends: 18429 [2022-12-14 16:10:06,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 16:10:06,932 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 1167 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1238 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 16:10:06,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1238 Valid, 732 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 961 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 16:10:06,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18429 states. [2022-12-14 16:10:08,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18429 to 17017. [2022-12-14 16:10:08,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17017 states, 11927 states have (on average 1.52200888739834) internal successors, (18153), 12556 states have internal predecessors, (18153), 3780 states have call successors, (3780), 961 states have call predecessors, (3780), 1309 states have return successors, (4935), 3765 states have call predecessors, (4935), 3775 states have call successors, (4935) [2022-12-14 16:10:08,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17017 states to 17017 states and 26868 transitions. [2022-12-14 16:10:08,410 INFO L78 Accepts]: Start accepts. Automaton has 17017 states and 26868 transitions. Word has length 108 [2022-12-14 16:10:08,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:10:08,411 INFO L495 AbstractCegarLoop]: Abstraction has 17017 states and 26868 transitions. [2022-12-14 16:10:08,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-12-14 16:10:08,411 INFO L276 IsEmpty]: Start isEmpty. Operand 17017 states and 26868 transitions. [2022-12-14 16:10:08,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-14 16:10:08,412 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:10:08,413 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:10:08,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 16:10:08,413 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:10:08,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:10:08,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1681852945, now seen corresponding path program 1 times [2022-12-14 16:10:08,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:10:08,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817998984] [2022-12-14 16:10:08,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:10:08,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:10:08,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:10:08,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 16:10:08,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:10:08,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817998984] [2022-12-14 16:10:08,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817998984] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:10:08,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:10:08,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 16:10:08,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304762734] [2022-12-14 16:10:08,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:10:08,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 16:10:08,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:10:08,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 16:10:08,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 16:10:08,569 INFO L87 Difference]: Start difference. First operand 17017 states and 26868 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-12-14 16:10:12,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:10:12,104 INFO L93 Difference]: Finished difference Result 46080 states and 74193 transitions. [2022-12-14 16:10:12,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 16:10:12,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 109 [2022-12-14 16:10:12,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:10:12,198 INFO L225 Difference]: With dead ends: 46080 [2022-12-14 16:10:12,198 INFO L226 Difference]: Without dead ends: 29089 [2022-12-14 16:10:12,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 16:10:12,243 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 1154 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 371 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1224 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 16:10:12,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1224 Valid, 744 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [371 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 16:10:12,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29089 states. [2022-12-14 16:10:14,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29089 to 27224. [2022-12-14 16:10:14,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27224 states, 19123 states have (on average 1.5237148982900173) internal successors, (29138), 20290 states have internal predecessors, (29138), 5865 states have call successors, (5865), 1595 states have call predecessors, (5865), 2235 states have return successors, (8390), 5779 states have call predecessors, (8390), 5860 states have call successors, (8390) [2022-12-14 16:10:14,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27224 states to 27224 states and 43393 transitions. [2022-12-14 16:10:14,521 INFO L78 Accepts]: Start accepts. Automaton has 27224 states and 43393 transitions. Word has length 109 [2022-12-14 16:10:14,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:10:14,521 INFO L495 AbstractCegarLoop]: Abstraction has 27224 states and 43393 transitions. [2022-12-14 16:10:14,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-12-14 16:10:14,522 INFO L276 IsEmpty]: Start isEmpty. Operand 27224 states and 43393 transitions. [2022-12-14 16:10:14,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-12-14 16:10:14,523 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:10:14,523 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:10:14,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 16:10:14,523 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:10:14,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:10:14,524 INFO L85 PathProgramCache]: Analyzing trace with hash -597971978, now seen corresponding path program 1 times [2022-12-14 16:10:14,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:10:14,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301551256] [2022-12-14 16:10:14,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:10:14,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:10:14,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:10:14,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 16:10:14,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:10:14,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301551256] [2022-12-14 16:10:14,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301551256] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:10:14,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:10:14,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 16:10:14,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195568173] [2022-12-14 16:10:14,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:10:14,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 16:10:14,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:10:14,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 16:10:14,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 16:10:14,738 INFO L87 Difference]: Start difference. First operand 27224 states and 43393 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-12-14 16:10:20,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:10:20,190 INFO L93 Difference]: Finished difference Result 77071 states and 126980 transitions. [2022-12-14 16:10:20,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 16:10:20,191 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 110 [2022-12-14 16:10:20,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:10:20,373 INFO L225 Difference]: With dead ends: 77071 [2022-12-14 16:10:20,373 INFO L226 Difference]: Without dead ends: 49879 [2022-12-14 16:10:20,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 16:10:20,456 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 1141 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1210 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 1326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:10:20,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1210 Valid, 756 Invalid, 1326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 16:10:20,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49879 states. [2022-12-14 16:10:24,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49879 to 48118. [2022-12-14 16:10:24,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48118 states, 33810 states have (on average 1.5218870156758355) internal successors, (51455), 36105 states have internal predecessors, (51455), 10144 states have call successors, (10144), 2863 states have call predecessors, (10144), 4163 states have return successors, (16469), 9926 states have call predecessors, (16469), 10139 states have call successors, (16469) [2022-12-14 16:10:24,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48118 states to 48118 states and 78068 transitions. [2022-12-14 16:10:24,947 INFO L78 Accepts]: Start accepts. Automaton has 48118 states and 78068 transitions. Word has length 110 [2022-12-14 16:10:24,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:10:24,948 INFO L495 AbstractCegarLoop]: Abstraction has 48118 states and 78068 transitions. [2022-12-14 16:10:24,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-12-14 16:10:24,948 INFO L276 IsEmpty]: Start isEmpty. Operand 48118 states and 78068 transitions. [2022-12-14 16:10:24,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-12-14 16:10:24,949 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:10:24,950 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:10:24,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 16:10:24,950 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:10:24,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:10:24,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1413932525, now seen corresponding path program 1 times [2022-12-14 16:10:24,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:10:24,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463395867] [2022-12-14 16:10:24,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:10:24,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:10:24,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:10:25,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 16:10:25,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:10:25,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463395867] [2022-12-14 16:10:25,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463395867] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:10:25,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:10:25,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 16:10:25,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547158841] [2022-12-14 16:10:25,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:10:25,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 16:10:25,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:10:25,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 16:10:25,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 16:10:25,140 INFO L87 Difference]: Start difference. First operand 48118 states and 78068 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-12-14 16:10:34,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:10:34,541 INFO L93 Difference]: Finished difference Result 140479 states and 240790 transitions. [2022-12-14 16:10:34,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 16:10:34,542 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 110 [2022-12-14 16:10:34,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:10:34,933 INFO L225 Difference]: With dead ends: 140479 [2022-12-14 16:10:34,933 INFO L226 Difference]: Without dead ends: 92405 [2022-12-14 16:10:35,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 16:10:35,075 INFO L413 NwaCegarLoop]: 369 mSDtfsCounter, 1128 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1196 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 16:10:35,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1196 Valid, 765 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 16:10:35,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92405 states. [2022-12-14 16:10:43,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92405 to 89424. [2022-12-14 16:10:43,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89424 states, 62765 states have (on average 1.5169600892217) internal successors, (95212), 67440 states have internal predecessors, (95212), 18515 states have call successors, (18515), 5399 states have call predecessors, (18515), 8143 states have return successors, (35852), 18033 states have call predecessors, (35852), 18510 states have call successors, (35852) [2022-12-14 16:10:44,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89424 states to 89424 states and 149579 transitions. [2022-12-14 16:10:44,107 INFO L78 Accepts]: Start accepts. Automaton has 89424 states and 149579 transitions. Word has length 110 [2022-12-14 16:10:44,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:10:44,108 INFO L495 AbstractCegarLoop]: Abstraction has 89424 states and 149579 transitions. [2022-12-14 16:10:44,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-12-14 16:10:44,108 INFO L276 IsEmpty]: Start isEmpty. Operand 89424 states and 149579 transitions. [2022-12-14 16:10:44,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-12-14 16:10:44,110 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:10:44,110 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:10:44,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 16:10:44,110 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:10:44,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:10:44,110 INFO L85 PathProgramCache]: Analyzing trace with hash 870252184, now seen corresponding path program 1 times [2022-12-14 16:10:44,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:10:44,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137981319] [2022-12-14 16:10:44,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:10:44,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:10:44,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:10:44,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 16:10:44,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:10:44,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137981319] [2022-12-14 16:10:44,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137981319] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:10:44,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:10:44,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 16:10:44,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778593691] [2022-12-14 16:10:44,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:10:44,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 16:10:44,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:10:44,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 16:10:44,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 16:10:44,232 INFO L87 Difference]: Start difference. First operand 89424 states and 149579 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-12-14 16:11:02,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:11:02,243 INFO L93 Difference]: Finished difference Result 266526 states and 487605 transitions. [2022-12-14 16:11:02,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 16:11:02,244 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 112 [2022-12-14 16:11:02,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:11:03,038 INFO L225 Difference]: With dead ends: 266526 [2022-12-14 16:11:03,038 INFO L226 Difference]: Without dead ends: 177160 [2022-12-14 16:11:03,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 16:11:03,494 INFO L413 NwaCegarLoop]: 379 mSDtfsCounter, 1125 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1192 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 16:11:03,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1192 Valid, 779 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 16:11:03,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177160 states. [2022-12-14 16:11:22,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177160 to 170351. [2022-12-14 16:11:22,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170351 states, 119683 states have (on average 1.5145676495408704) internal successors, (181268), 128879 states have internal predecessors, (181268), 34840 states have call successors, (34840), 10436 states have call predecessors, (34840), 15827 states have return successors, (80176), 33828 states have call predecessors, (80176), 34835 states have call successors, (80176) [2022-12-14 16:11:22,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170351 states to 170351 states and 296284 transitions. [2022-12-14 16:11:22,955 INFO L78 Accepts]: Start accepts. Automaton has 170351 states and 296284 transitions. Word has length 112 [2022-12-14 16:11:22,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:11:22,955 INFO L495 AbstractCegarLoop]: Abstraction has 170351 states and 296284 transitions. [2022-12-14 16:11:22,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-12-14 16:11:22,955 INFO L276 IsEmpty]: Start isEmpty. Operand 170351 states and 296284 transitions. [2022-12-14 16:11:22,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-12-14 16:11:22,961 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:11:22,961 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:11:22,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 16:11:22,961 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:11:22,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:11:22,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1562377219, now seen corresponding path program 1 times [2022-12-14 16:11:22,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:11:22,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563163042] [2022-12-14 16:11:22,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:11:22,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:11:22,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:11:23,202 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 16:11:23,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:11:23,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563163042] [2022-12-14 16:11:23,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563163042] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:11:23,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56088753] [2022-12-14 16:11:23,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:11:23,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:11:23,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:11:23,203 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:11:23,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 16:11:23,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:11:23,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 2083 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 16:11:23,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:11:23,571 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 16:11:23,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:11:23,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56088753] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:11:23,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:11:23,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2022-12-14 16:11:23,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108401009] [2022-12-14 16:11:23,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:11:23,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 16:11:23,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:11:23,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 16:11:23,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-12-14 16:11:23,573 INFO L87 Difference]: Start difference. First operand 170351 states and 296284 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-14 16:11:40,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:11:40,968 INFO L93 Difference]: Finished difference Result 353555 states and 635187 transitions. [2022-12-14 16:11:40,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 16:11:40,969 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 149 [2022-12-14 16:11:40,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:11:41,735 INFO L225 Difference]: With dead ends: 353555 [2022-12-14 16:11:41,735 INFO L226 Difference]: Without dead ends: 183221 [2022-12-14 16:11:42,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-12-14 16:11:42,559 INFO L413 NwaCegarLoop]: 494 mSDtfsCounter, 213 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1458 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 16:11:42,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1458 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 16:11:42,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183221 states. [2022-12-14 16:11:59,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183221 to 183221. [2022-12-14 16:11:59,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183221 states, 132223 states have (on average 1.5531185951007012) internal successors, (205358), 141419 states have internal predecessors, (205358), 34840 states have call successors, (34840), 10766 states have call predecessors, (34840), 16157 states have return successors, (80176), 33828 states have call predecessors, (80176), 34835 states have call successors, (80176) [2022-12-14 16:12:00,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183221 states to 183221 states and 320374 transitions. [2022-12-14 16:12:00,237 INFO L78 Accepts]: Start accepts. Automaton has 183221 states and 320374 transitions. Word has length 149 [2022-12-14 16:12:00,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:12:00,237 INFO L495 AbstractCegarLoop]: Abstraction has 183221 states and 320374 transitions. [2022-12-14 16:12:00,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-14 16:12:00,237 INFO L276 IsEmpty]: Start isEmpty. Operand 183221 states and 320374 transitions. [2022-12-14 16:12:00,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-12-14 16:12:00,244 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:12:00,244 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:12:00,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 16:12:00,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 16:12:00,445 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:12:00,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:12:00,445 INFO L85 PathProgramCache]: Analyzing trace with hash -44973903, now seen corresponding path program 1 times [2022-12-14 16:12:00,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:12:00,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14109876] [2022-12-14 16:12:00,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:12:00,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:12:00,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:12:00,564 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-12-14 16:12:00,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:12:00,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14109876] [2022-12-14 16:12:00,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14109876] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:12:00,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714645790] [2022-12-14 16:12:00,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:12:00,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:12:00,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:12:00,565 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:12:00,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 16:12:00,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:12:00,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 2088 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 16:12:00,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:12:00,922 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 16:12:00,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:12:00,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714645790] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:12:00,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:12:00,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 16:12:00,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19146003] [2022-12-14 16:12:00,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:12:00,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 16:12:00,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:12:00,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 16:12:00,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 16:12:00,924 INFO L87 Difference]: Start difference. First operand 183221 states and 320374 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-14 16:12:17,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:12:17,734 INFO L93 Difference]: Finished difference Result 379295 states and 682884 transitions. [2022-12-14 16:12:17,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 16:12:17,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 154 [2022-12-14 16:12:17,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:12:18,527 INFO L225 Difference]: With dead ends: 379295 [2022-12-14 16:12:18,527 INFO L226 Difference]: Without dead ends: 196091 [2022-12-14 16:12:19,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:12:19,120 INFO L413 NwaCegarLoop]: 494 mSDtfsCounter, 211 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1458 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 16:12:19,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1458 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 16:12:19,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196091 states. [2022-12-14 16:12:36,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196091 to 196091. [2022-12-14 16:12:36,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196091 states, 144763 states have (on average 1.5849906398734483) internal successors, (229448), 153959 states have internal predecessors, (229448), 34840 states have call successors, (34840), 11096 states have call predecessors, (34840), 16487 states have return successors, (80176), 33828 states have call predecessors, (80176), 34835 states have call successors, (80176) [2022-12-14 16:12:37,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196091 states to 196091 states and 344464 transitions. [2022-12-14 16:12:37,040 INFO L78 Accepts]: Start accepts. Automaton has 196091 states and 344464 transitions. Word has length 154 [2022-12-14 16:12:37,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:12:37,041 INFO L495 AbstractCegarLoop]: Abstraction has 196091 states and 344464 transitions. [2022-12-14 16:12:37,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-14 16:12:37,041 INFO L276 IsEmpty]: Start isEmpty. Operand 196091 states and 344464 transitions. [2022-12-14 16:12:37,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-12-14 16:12:37,047 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:12:37,047 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:12:37,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 16:12:37,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 16:12:37,248 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:12:37,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:12:37,249 INFO L85 PathProgramCache]: Analyzing trace with hash -169206943, now seen corresponding path program 1 times [2022-12-14 16:12:37,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:12:37,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106338280] [2022-12-14 16:12:37,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:12:37,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:12:37,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:12:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-12-14 16:12:37,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:12:37,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106338280] [2022-12-14 16:12:37,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106338280] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:12:37,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397974552] [2022-12-14 16:12:37,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:12:37,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:12:37,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:12:37,367 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:12:37,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 16:12:37,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:12:37,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 2092 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 16:12:37,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:12:37,630 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 16:12:37,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:12:37,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397974552] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:12:37,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:12:37,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 16:12:37,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506706310] [2022-12-14 16:12:37,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:12:37,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 16:12:37,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:12:37,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 16:12:37,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 16:12:37,631 INFO L87 Difference]: Start difference. First operand 196091 states and 344464 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-14 16:12:54,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:12:54,849 INFO L93 Difference]: Finished difference Result 405035 states and 730581 transitions. [2022-12-14 16:12:54,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 16:12:54,850 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 158 [2022-12-14 16:12:54,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:12:55,706 INFO L225 Difference]: With dead ends: 405035 [2022-12-14 16:12:55,707 INFO L226 Difference]: Without dead ends: 208961 [2022-12-14 16:12:56,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:12:56,307 INFO L413 NwaCegarLoop]: 494 mSDtfsCounter, 209 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1458 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 16:12:56,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1458 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 16:12:56,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208961 states. [2022-12-14 16:13:13,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208961 to 208961. [2022-12-14 16:13:13,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208961 states, 157303 states have (on average 1.6117810849125573) internal successors, (253538), 166499 states have internal predecessors, (253538), 34840 states have call successors, (34840), 11426 states have call predecessors, (34840), 16817 states have return successors, (80176), 33828 states have call predecessors, (80176), 34835 states have call successors, (80176) [2022-12-14 16:13:14,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208961 states to 208961 states and 368554 transitions. [2022-12-14 16:13:14,666 INFO L78 Accepts]: Start accepts. Automaton has 208961 states and 368554 transitions. Word has length 158 [2022-12-14 16:13:14,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:13:14,666 INFO L495 AbstractCegarLoop]: Abstraction has 208961 states and 368554 transitions. [2022-12-14 16:13:14,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-14 16:13:14,667 INFO L276 IsEmpty]: Start isEmpty. Operand 208961 states and 368554 transitions. [2022-12-14 16:13:14,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-12-14 16:13:14,674 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:13:14,674 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:13:14,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 16:13:14,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:13:14,875 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:13:14,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:13:14,876 INFO L85 PathProgramCache]: Analyzing trace with hash -213232533, now seen corresponding path program 1 times [2022-12-14 16:13:14,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:13:14,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957167876] [2022-12-14 16:13:14,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:13:14,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:13:14,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:15,016 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-14 16:13:15,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:13:15,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957167876] [2022-12-14 16:13:15,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957167876] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:13:15,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175354857] [2022-12-14 16:13:15,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:13:15,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:13:15,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:13:15,017 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:13:15,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 16:13:15,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:15,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 2095 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 16:13:15,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:13:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 16:13:15,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:13:15,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175354857] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:13:15,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:13:15,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 16:13:15,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669291499] [2022-12-14 16:13:15,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:13:15,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 16:13:15,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:13:15,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 16:13:15,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 16:13:15,342 INFO L87 Difference]: Start difference. First operand 208961 states and 368554 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-14 16:13:32,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:13:32,844 INFO L93 Difference]: Finished difference Result 430775 states and 778278 transitions. [2022-12-14 16:13:32,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 16:13:32,845 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 161 [2022-12-14 16:13:32,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:13:33,712 INFO L225 Difference]: With dead ends: 430775 [2022-12-14 16:13:33,712 INFO L226 Difference]: Without dead ends: 221831 [2022-12-14 16:13:34,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:13:34,314 INFO L413 NwaCegarLoop]: 494 mSDtfsCounter, 207 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1458 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 16:13:34,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1458 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 16:13:34,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221831 states. [2022-12-14 16:13:51,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221831 to 221831. [2022-12-14 16:13:51,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221831 states, 169843 states have (on average 1.6346154978421248) internal successors, (277628), 179039 states have internal predecessors, (277628), 34840 states have call successors, (34840), 11756 states have call predecessors, (34840), 17147 states have return successors, (80176), 33828 states have call predecessors, (80176), 34835 states have call successors, (80176) [2022-12-14 16:13:53,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221831 states to 221831 states and 392644 transitions. [2022-12-14 16:13:53,066 INFO L78 Accepts]: Start accepts. Automaton has 221831 states and 392644 transitions. Word has length 161 [2022-12-14 16:13:53,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:13:53,066 INFO L495 AbstractCegarLoop]: Abstraction has 221831 states and 392644 transitions. [2022-12-14 16:13:53,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-14 16:13:53,066 INFO L276 IsEmpty]: Start isEmpty. Operand 221831 states and 392644 transitions. [2022-12-14 16:13:53,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-12-14 16:13:53,073 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:13:53,073 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:13:53,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 16:13:53,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:13:53,275 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:13:53,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:13:53,276 INFO L85 PathProgramCache]: Analyzing trace with hash 452450649, now seen corresponding path program 1 times [2022-12-14 16:13:53,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:13:53,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215199817] [2022-12-14 16:13:53,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:13:53,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:13:53,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:53,515 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 16:13:53,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:13:53,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215199817] [2022-12-14 16:13:53,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215199817] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:13:53,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620208789] [2022-12-14 16:13:53,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:13:53,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:13:53,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:13:53,516 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:13:53,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8f44863-c436-42aa-ba9d-36ba24d923ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 16:13:53,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:13:53,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 2091 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-14 16:13:53,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:13:54,560 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-14 16:13:54,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:13:56,918 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 16:14:02,493 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 16:14:02,777 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 16:14:08,344 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 16:14:08,621 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 16:14:14,238 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 16:14:14,515 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 16:14:20,006 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 16:14:20,091 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 49188 disjunctions. This might take some time... [2022-12-14 16:16:50,453 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 49188 disjunctions.