./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product09.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_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/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_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/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_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/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 4cb164e6307f0ddcae5850d7f4578967441d1456f6ed5a5be472ba090758b873 --- 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 14:05:45,584 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 14:05:45,585 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 14:05:45,604 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 14:05:45,604 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 14:05:45,605 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 14:05:45,606 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 14:05:45,608 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 14:05:45,609 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 14:05:45,610 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 14:05:45,611 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 14:05:45,612 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 14:05:45,612 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 14:05:45,613 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 14:05:45,614 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 14:05:45,615 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 14:05:45,616 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 14:05:45,617 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 14:05:45,619 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 14:05:45,620 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 14:05:45,622 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 14:05:45,623 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 14:05:45,624 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 14:05:45,625 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 14:05:45,628 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 14:05:45,628 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 14:05:45,629 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 14:05:45,630 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 14:05:45,630 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 14:05:45,631 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 14:05:45,631 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 14:05:45,632 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 14:05:45,632 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 14:05:45,633 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 14:05:45,634 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 14:05:45,634 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 14:05:45,635 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 14:05:45,635 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 14:05:45,635 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 14:05:45,636 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 14:05:45,637 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 14:05:45,637 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 14:05:45,659 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 14:05:45,659 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 14:05:45,659 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 14:05:45,660 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 14:05:45,660 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 14:05:45,660 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 14:05:45,660 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 14:05:45,661 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 14:05:45,661 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 14:05:45,661 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 14:05:45,661 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 14:05:45,661 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 14:05:45,661 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 14:05:45,662 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 14:05:45,662 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 14:05:45,662 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 14:05:45,662 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 14:05:45,662 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 14:05:45,663 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 14:05:45,663 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 14:05:45,663 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 14:05:45,663 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 14:05:45,663 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 14:05:45,664 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 14:05:45,664 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 14:05:45,664 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 14:05:45,664 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 14:05:45,664 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 14:05:45,664 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 14:05:45,665 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 14:05:45,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 14:05:45,665 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 14:05:45,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:05:45,665 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 14:05:45,665 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 14:05:45,666 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 14:05:45,666 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 14:05:45,666 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 14:05:45,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 14:05:45,666 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 14:05:45,666 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 14:05:45,667 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_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cb164e6307f0ddcae5850d7f4578967441d1456f6ed5a5be472ba090758b873 [2022-12-14 14:05:45,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 14:05:45,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 14:05:45,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 14:05:45,863 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 14:05:45,863 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 14:05:45,864 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec2_product09.cil.c [2022-12-14 14:05:48,410 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 14:05:48,672 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 14:05:48,673 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/sv-benchmarks/c/product-lines/elevator_spec2_product09.cil.c [2022-12-14 14:05:48,687 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/data/c0c01ba9d/aadd61e7bde349ca95063a82b63f5afb/FLAG3abf87488 [2022-12-14 14:05:48,986 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/data/c0c01ba9d/aadd61e7bde349ca95063a82b63f5afb [2022-12-14 14:05:48,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 14:05:48,990 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 14:05:48,991 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 14:05:48,991 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 14:05:48,994 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 14:05:48,995 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:05:48" (1/1) ... [2022-12-14 14:05:48,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@689e2950 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:05:48, skipping insertion in model container [2022-12-14 14:05:48,996 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:05:48" (1/1) ... [2022-12-14 14:05:49,001 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 14:05:49,043 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 14:05:49,252 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_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/sv-benchmarks/c/product-lines/elevator_spec2_product09.cil.c[28842,28855] [2022-12-14 14:05:49,343 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:05:49,354 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 14:05:49,396 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_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/sv-benchmarks/c/product-lines/elevator_spec2_product09.cil.c[28842,28855] [2022-12-14 14:05:49,461 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:05:49,485 INFO L208 MainTranslator]: Completed translation [2022-12-14 14:05:49,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:05:49 WrapperNode [2022-12-14 14:05:49,486 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 14:05:49,487 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 14:05:49,487 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 14:05:49,487 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 14:05:49,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:05:49" (1/1) ... [2022-12-14 14:05:49,517 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:05:49" (1/1) ... [2022-12-14 14:05:49,554 INFO L138 Inliner]: procedures = 89, calls = 330, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 812 [2022-12-14 14:05:49,555 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 14:05:49,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 14:05:49,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 14:05:49,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 14:05:49,562 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:05:49" (1/1) ... [2022-12-14 14:05:49,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:05:49" (1/1) ... [2022-12-14 14:05:49,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:05:49" (1/1) ... [2022-12-14 14:05:49,567 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:05:49" (1/1) ... [2022-12-14 14:05:49,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:05:49" (1/1) ... [2022-12-14 14:05:49,597 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:05:49" (1/1) ... [2022-12-14 14:05:49,601 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:05:49" (1/1) ... [2022-12-14 14:05:49,605 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:05:49" (1/1) ... [2022-12-14 14:05:49,612 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 14:05:49,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 14:05:49,613 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 14:05:49,613 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 14:05:49,614 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:05:49" (1/1) ... [2022-12-14 14:05:49,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:05:49,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:05:49,643 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 14:05:49,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 14:05:49,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 14:05:49,678 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-12-14 14:05:49,678 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-12-14 14:05:49,678 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 14:05:49,678 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 14:05:49,678 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 14:05:49,678 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 14:05:49,678 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 14:05:49,679 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 14:05:49,679 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 14:05:49,679 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 14:05:49,679 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 14:05:49,679 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 14:05:49,679 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-12-14 14:05:49,680 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-12-14 14:05:49,680 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 14:05:49,680 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 14:05:49,680 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 14:05:49,680 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 14:05:49,680 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 14:05:49,680 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 14:05:49,681 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 14:05:49,681 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 14:05:49,681 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 14:05:49,681 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 14:05:49,681 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 14:05:49,681 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 14:05:49,682 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 14:05:49,682 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 14:05:49,682 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 14:05:49,682 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 14:05:49,682 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 14:05:49,682 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 14:05:49,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 14:05:49,683 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 14:05:49,683 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 14:05:49,683 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 14:05:49,683 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 14:05:49,683 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 14:05:49,683 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 14:05:49,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 14:05:49,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 14:05:49,684 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 14:05:49,684 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 14:05:49,793 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 14:05:49,795 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 14:05:50,483 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 14:05:50,936 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 14:05:50,936 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 14:05:50,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:05:50 BoogieIcfgContainer [2022-12-14 14:05:50,939 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 14:05:50,941 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 14:05:50,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 14:05:50,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 14:05:50,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:05:48" (1/3) ... [2022-12-14 14:05:50,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ece8bc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:05:50, skipping insertion in model container [2022-12-14 14:05:50,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:05:49" (2/3) ... [2022-12-14 14:05:50,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ece8bc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:05:50, skipping insertion in model container [2022-12-14 14:05:50,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:05:50" (3/3) ... [2022-12-14 14:05:50,946 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product09.cil.c [2022-12-14 14:05:50,965 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 14:05:50,965 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 14:05:51,008 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 14:05:51,013 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;@7d4ac6e4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 14:05:51,013 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 14:05:51,018 INFO L276 IsEmpty]: Start isEmpty. Operand has 341 states, 233 states have (on average 1.6309012875536482) internal successors, (380), 254 states have internal predecessors, (380), 86 states have call successors, (86), 20 states have call predecessors, (86), 20 states have return successors, (86), 80 states have call predecessors, (86), 86 states have call successors, (86) [2022-12-14 14:05:51,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 14:05:51,029 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:05:51,029 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] [2022-12-14 14:05:51,030 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:05:51,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:05:51,034 INFO L85 PathProgramCache]: Analyzing trace with hash 898169167, now seen corresponding path program 1 times [2022-12-14 14:05:51,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:05:51,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951438875] [2022-12-14 14:05:51,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:05:51,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:05:51,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:05:51,301 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 14:05:51,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:05:51,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951438875] [2022-12-14 14:05:51,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951438875] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:05:51,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:05:51,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 14:05:51,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858514872] [2022-12-14 14:05:51,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:05:51,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 14:05:51,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:05:51,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 14:05:51,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 14:05:51,333 INFO L87 Difference]: Start difference. First operand has 341 states, 233 states have (on average 1.6309012875536482) internal successors, (380), 254 states have internal predecessors, (380), 86 states have call successors, (86), 20 states have call predecessors, (86), 20 states have return successors, (86), 80 states have call predecessors, (86), 86 states have call successors, (86) Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-12-14 14:05:51,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:05:51,441 INFO L93 Difference]: Finished difference Result 359 states and 579 transitions. [2022-12-14 14:05:51,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 14:05:51,443 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 51 [2022-12-14 14:05:51,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:05:51,452 INFO L225 Difference]: With dead ends: 359 [2022-12-14 14:05:51,452 INFO L226 Difference]: Without dead ends: 337 [2022-12-14 14:05:51,455 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 14:05:51,457 INFO L413 NwaCegarLoop]: 513 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:05:51,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 513 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:05:51,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-12-14 14:05:51,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 337. [2022-12-14 14:05:51,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 231 states have (on average 1.619047619047619) internal successors, (374), 250 states have internal predecessors, (374), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2022-12-14 14:05:51,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 541 transitions. [2022-12-14 14:05:51,505 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 541 transitions. Word has length 51 [2022-12-14 14:05:51,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:05:51,506 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 541 transitions. [2022-12-14 14:05:51,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-12-14 14:05:51,507 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 541 transitions. [2022-12-14 14:05:51,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 14:05:51,510 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:05:51,510 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] [2022-12-14 14:05:51,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 14:05:51,510 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:05:51,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:05:51,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1212374684, now seen corresponding path program 1 times [2022-12-14 14:05:51,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:05:51,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384354246] [2022-12-14 14:05:51,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:05:51,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:05:51,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:05:51,834 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 14:05:51,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:05:51,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384354246] [2022-12-14 14:05:51,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384354246] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:05:51,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:05:51,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 14:05:51,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886320193] [2022-12-14 14:05:51,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:05:51,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 14:05:51,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:05:51,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 14:05:51,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:05:51,838 INFO L87 Difference]: Start difference. First operand 337 states and 541 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 14:05:53,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:05:53,577 INFO L93 Difference]: Finished difference Result 1142 states and 1868 transitions. [2022-12-14 14:05:53,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 14:05:53,578 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2022-12-14 14:05:53,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:05:53,584 INFO L225 Difference]: With dead ends: 1142 [2022-12-14 14:05:53,584 INFO L226 Difference]: Without dead ends: 821 [2022-12-14 14:05:53,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-12-14 14:05:53,589 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 1614 mSDsluCounter, 1282 mSDsCounter, 0 mSdLazyCounter, 2433 mSolverCounterSat, 494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1675 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 2927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 494 IncrementalHoareTripleChecker+Valid, 2433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 14:05:53,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1675 Valid, 1657 Invalid, 2927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [494 Valid, 2433 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 14:05:53,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-12-14 14:05:53,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 772. [2022-12-14 14:05:53,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 549 states have (on average 1.6466302367941712) internal successors, (904), 584 states have internal predecessors, (904), 181 states have call successors, (181), 39 states have call predecessors, (181), 41 states have return successors, (182), 173 states have call predecessors, (182), 176 states have call successors, (182) [2022-12-14 14:05:53,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 1267 transitions. [2022-12-14 14:05:53,664 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 1267 transitions. Word has length 52 [2022-12-14 14:05:53,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:05:53,664 INFO L495 AbstractCegarLoop]: Abstraction has 772 states and 1267 transitions. [2022-12-14 14:05:53,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 14:05:53,665 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 1267 transitions. [2022-12-14 14:05:53,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 14:05:53,668 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:05:53,668 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] [2022-12-14 14:05:53,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 14:05:53,668 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:05:53,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:05:53,669 INFO L85 PathProgramCache]: Analyzing trace with hash -880320930, now seen corresponding path program 1 times [2022-12-14 14:05:53,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:05:53,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590849195] [2022-12-14 14:05:53,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:05:53,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:05:53,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:05:53,824 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 14:05:53,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:05:53,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590849195] [2022-12-14 14:05:53,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590849195] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:05:53,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:05:53,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 14:05:53,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495164804] [2022-12-14 14:05:53,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:05:53,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:05:53,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:05:53,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:05:53,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:05:53,827 INFO L87 Difference]: Start difference. First operand 772 states and 1267 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 14:05:53,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:05:53,985 INFO L93 Difference]: Finished difference Result 1302 states and 2142 transitions. [2022-12-14 14:05:53,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:05:53,986 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-12-14 14:05:53,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:05:53,989 INFO L225 Difference]: With dead ends: 1302 [2022-12-14 14:05:53,990 INFO L226 Difference]: Without dead ends: 842 [2022-12-14 14:05:53,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:05:53,992 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 41 mSDsluCounter, 1588 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 2141 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:05:53,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 2141 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:05:53,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-12-14 14:05:54,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 784. [2022-12-14 14:05:54,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 558 states have (on average 1.636200716845878) internal successors, (913), 593 states have internal predecessors, (913), 181 states have call successors, (181), 39 states have call predecessors, (181), 44 states have return successors, (188), 176 states have call predecessors, (188), 176 states have call successors, (188) [2022-12-14 14:05:54,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1282 transitions. [2022-12-14 14:05:54,028 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1282 transitions. Word has length 56 [2022-12-14 14:05:54,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:05:54,028 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 1282 transitions. [2022-12-14 14:05:54,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 14:05:54,028 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1282 transitions. [2022-12-14 14:05:54,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-14 14:05:54,030 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:05:54,030 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] [2022-12-14 14:05:54,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 14:05:54,030 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:05:54,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:05:54,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1789734982, now seen corresponding path program 1 times [2022-12-14 14:05:54,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:05:54,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129449558] [2022-12-14 14:05:54,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:05:54,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:05:54,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:05:54,210 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 14:05:54,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:05:54,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129449558] [2022-12-14 14:05:54,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129449558] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:05:54,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:05:54,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 14:05:54,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701506524] [2022-12-14 14:05:54,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:05:54,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 14:05:54,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:05:54,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 14:05:54,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-14 14:05:54,212 INFO L87 Difference]: Start difference. First operand 784 states and 1282 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-12-14 14:05:55,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:05:55,650 INFO L93 Difference]: Finished difference Result 1791 states and 2921 transitions. [2022-12-14 14:05:55,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 14:05:55,650 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 60 [2022-12-14 14:05:55,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:05:55,655 INFO L225 Difference]: With dead ends: 1791 [2022-12-14 14:05:55,656 INFO L226 Difference]: Without dead ends: 1223 [2022-12-14 14:05:55,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 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 14:05:55,658 INFO L413 NwaCegarLoop]: 491 mSDtfsCounter, 3032 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 2016 mSolverCounterSat, 1313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3175 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 3329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1313 IncrementalHoareTripleChecker+Valid, 2016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:05:55,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3175 Valid, 1120 Invalid, 3329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1313 Valid, 2016 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 14:05:55,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2022-12-14 14:05:55,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 1129. [2022-12-14 14:05:55,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1129 states, 791 states have (on average 1.5903919089759797) internal successors, (1258), 843 states have internal predecessors, (1258), 267 states have call successors, (267), 62 states have call predecessors, (267), 70 states have return successors, (283), 260 states have call predecessors, (283), 262 states have call successors, (283) [2022-12-14 14:05:55,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 1808 transitions. [2022-12-14 14:05:55,707 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 1808 transitions. Word has length 60 [2022-12-14 14:05:55,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:05:55,708 INFO L495 AbstractCegarLoop]: Abstraction has 1129 states and 1808 transitions. [2022-12-14 14:05:55,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-12-14 14:05:55,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 1808 transitions. [2022-12-14 14:05:55,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 14:05:55,709 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:05:55,709 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] [2022-12-14 14:05:55,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 14:05:55,710 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:05:55,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:05:55,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1659780804, now seen corresponding path program 1 times [2022-12-14 14:05:55,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:05:55,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89511283] [2022-12-14 14:05:55,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:05:55,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:05:55,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:05:55,805 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 14:05:55,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:05:55,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89511283] [2022-12-14 14:05:55,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89511283] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:05:55,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:05:55,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:05:55,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222305450] [2022-12-14 14:05:55,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:05:55,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:05:55,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:05:55,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:05:55,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:05:55,807 INFO L87 Difference]: Start difference. First operand 1129 states and 1808 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:05:56,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:05:56,003 INFO L93 Difference]: Finished difference Result 2186 states and 3555 transitions. [2022-12-14 14:05:56,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:05:56,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 63 [2022-12-14 14:05:56,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:05:56,009 INFO L225 Difference]: With dead ends: 2186 [2022-12-14 14:05:56,009 INFO L226 Difference]: Without dead ends: 1129 [2022-12-14 14:05:56,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:05:56,013 INFO L413 NwaCegarLoop]: 536 mSDtfsCounter, 210 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1380 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:05:56,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 1380 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:05:56,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2022-12-14 14:05:56,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 1129. [2022-12-14 14:05:56,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1129 states, 791 states have (on average 1.5499367888748419) internal successors, (1226), 843 states have internal predecessors, (1226), 267 states have call successors, (267), 62 states have call predecessors, (267), 70 states have return successors, (283), 260 states have call predecessors, (283), 262 states have call successors, (283) [2022-12-14 14:05:56,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 1776 transitions. [2022-12-14 14:05:56,066 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 1776 transitions. Word has length 63 [2022-12-14 14:05:56,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:05:56,067 INFO L495 AbstractCegarLoop]: Abstraction has 1129 states and 1776 transitions. [2022-12-14 14:05:56,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:05:56,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 1776 transitions. [2022-12-14 14:05:56,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-14 14:05:56,068 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:05:56,069 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] [2022-12-14 14:05:56,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 14:05:56,069 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:05:56,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:05:56,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1091552266, now seen corresponding path program 1 times [2022-12-14 14:05:56,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:05:56,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335702598] [2022-12-14 14:05:56,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:05:56,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:05:56,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:05:56,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 14:05:56,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:05:56,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335702598] [2022-12-14 14:05:56,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335702598] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:05:56,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:05:56,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 14:05:56,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426100244] [2022-12-14 14:05:56,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:05:56,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 14:05:56,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:05:56,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 14:05:56,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:05:56,238 INFO L87 Difference]: Start difference. First operand 1129 states and 1776 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:05:57,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:05:57,435 INFO L93 Difference]: Finished difference Result 2173 states and 3433 transitions. [2022-12-14 14:05:57,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 14:05:57,436 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 65 [2022-12-14 14:05:57,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:05:57,441 INFO L225 Difference]: With dead ends: 2173 [2022-12-14 14:05:57,441 INFO L226 Difference]: Without dead ends: 1317 [2022-12-14 14:05:57,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 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 14:05:57,444 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 905 mSDsluCounter, 1160 mSDsCounter, 0 mSdLazyCounter, 2230 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 973 SdHoareTripleChecker+Valid, 1512 SdHoareTripleChecker+Invalid, 2588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 2230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:05:57,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [973 Valid, 1512 Invalid, 2588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 2230 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 14:05:57,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2022-12-14 14:05:57,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 1156. [2022-12-14 14:05:57,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 809 states have (on average 1.542645241038319) internal successors, (1248), 865 states have internal predecessors, (1248), 268 states have call successors, (268), 67 states have call predecessors, (268), 78 states have return successors, (294), 260 states have call predecessors, (294), 263 states have call successors, (294) [2022-12-14 14:05:57,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1810 transitions. [2022-12-14 14:05:57,504 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1810 transitions. Word has length 65 [2022-12-14 14:05:57,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:05:57,504 INFO L495 AbstractCegarLoop]: Abstraction has 1156 states and 1810 transitions. [2022-12-14 14:05:57,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:05:57,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1810 transitions. [2022-12-14 14:05:57,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-14 14:05:57,506 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:05:57,506 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] [2022-12-14 14:05:57,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 14:05:57,506 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:05:57,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:05:57,507 INFO L85 PathProgramCache]: Analyzing trace with hash -119950829, now seen corresponding path program 1 times [2022-12-14 14:05:57,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:05:57,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905253280] [2022-12-14 14:05:57,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:05:57,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:05:57,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:05:57,629 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 14:05:57,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:05:57,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905253280] [2022-12-14 14:05:57,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905253280] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:05:57,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:05:57,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 14:05:57,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000233758] [2022-12-14 14:05:57,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:05:57,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:05:57,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:05:57,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:05:57,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:05:57,631 INFO L87 Difference]: Start difference. First operand 1156 states and 1810 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 14:05:58,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:05:58,054 INFO L93 Difference]: Finished difference Result 1228 states and 1923 transitions. [2022-12-14 14:05:58,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:05:58,054 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 72 [2022-12-14 14:05:58,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:05:58,059 INFO L225 Difference]: With dead ends: 1228 [2022-12-14 14:05:58,059 INFO L226 Difference]: Without dead ends: 1213 [2022-12-14 14:05:58,059 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 14:05:58,060 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 595 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 1656 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:05:58,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [596 Valid, 1656 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:05:58,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-12-14 14:05:58,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1160. [2022-12-14 14:05:58,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 813 states have (on average 1.5399753997539976) internal successors, (1252), 869 states have internal predecessors, (1252), 268 states have call successors, (268), 67 states have call predecessors, (268), 78 states have return successors, (294), 260 states have call predecessors, (294), 263 states have call successors, (294) [2022-12-14 14:05:58,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1814 transitions. [2022-12-14 14:05:58,117 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1814 transitions. Word has length 72 [2022-12-14 14:05:58,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:05:58,118 INFO L495 AbstractCegarLoop]: Abstraction has 1160 states and 1814 transitions. [2022-12-14 14:05:58,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 14:05:58,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1814 transitions. [2022-12-14 14:05:58,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 14:05:58,120 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:05:58,120 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] [2022-12-14 14:05:58,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 14:05:58,121 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:05:58,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:05:58,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1681971179, now seen corresponding path program 1 times [2022-12-14 14:05:58,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:05:58,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271645644] [2022-12-14 14:05:58,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:05:58,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:05:58,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:05:58,262 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 14:05:58,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:05:58,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271645644] [2022-12-14 14:05:58,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271645644] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:05:58,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:05:58,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 14:05:58,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57379740] [2022-12-14 14:05:58,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:05:58,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:05:58,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:05:58,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:05:58,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:05:58,264 INFO L87 Difference]: Start difference. First operand 1160 states and 1814 transitions. Second operand has 5 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 1 states have call successors, (13) [2022-12-14 14:05:58,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:05:58,408 INFO L93 Difference]: Finished difference Result 1179 states and 1838 transitions. [2022-12-14 14:05:58,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 14:05:58,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 1 states have call successors, (13) Word has length 77 [2022-12-14 14:05:58,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:05:58,413 INFO L225 Difference]: With dead ends: 1179 [2022-12-14 14:05:58,413 INFO L226 Difference]: Without dead ends: 1164 [2022-12-14 14:05:58,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:05:58,414 INFO L413 NwaCegarLoop]: 502 mSDtfsCounter, 30 mSDsluCounter, 1468 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1970 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:05:58,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1970 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:05:58,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2022-12-14 14:05:58,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1160. [2022-12-14 14:05:58,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 813 states have (on average 1.5362853628536286) internal successors, (1249), 869 states have internal predecessors, (1249), 268 states have call successors, (268), 67 states have call predecessors, (268), 78 states have return successors, (294), 260 states have call predecessors, (294), 263 states have call successors, (294) [2022-12-14 14:05:58,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1811 transitions. [2022-12-14 14:05:58,461 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1811 transitions. Word has length 77 [2022-12-14 14:05:58,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:05:58,461 INFO L495 AbstractCegarLoop]: Abstraction has 1160 states and 1811 transitions. [2022-12-14 14:05:58,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 1 states have call successors, (13) [2022-12-14 14:05:58,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1811 transitions. [2022-12-14 14:05:58,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-12-14 14:05:58,463 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:05:58,463 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 14:05:58,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 14:05:58,463 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:05:58,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:05:58,463 INFO L85 PathProgramCache]: Analyzing trace with hash -667316590, now seen corresponding path program 1 times [2022-12-14 14:05:58,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:05:58,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095125619] [2022-12-14 14:05:58,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:05:58,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:05:58,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:05:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 14:05:58,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:05:58,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095125619] [2022-12-14 14:05:58,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095125619] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:05:58,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:05:58,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:05:58,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052398405] [2022-12-14 14:05:58,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:05:58,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:05:58,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:05:58,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:05:58,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:05:58,601 INFO L87 Difference]: Start difference. First operand 1160 states and 1811 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 14:05:59,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:05:59,615 INFO L93 Difference]: Finished difference Result 3735 states and 5935 transitions. [2022-12-14 14:05:59,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:05:59,615 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 84 [2022-12-14 14:05:59,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:05:59,623 INFO L225 Difference]: With dead ends: 3735 [2022-12-14 14:05:59,623 INFO L226 Difference]: Without dead ends: 2591 [2022-12-14 14:05:59,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 14:05:59,627 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 1061 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1123 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 14:05:59,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1123 Valid, 671 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 14:05:59,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2022-12-14 14:05:59,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 2344. [2022-12-14 14:05:59,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 1673 states have (on average 1.5457262402869096) internal successors, (2586), 1784 states have internal predecessors, (2586), 517 states have call successors, (517), 123 states have call predecessors, (517), 153 states have return successors, (594), 489 states have call predecessors, (594), 512 states have call successors, (594) [2022-12-14 14:05:59,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 3697 transitions. [2022-12-14 14:05:59,751 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 3697 transitions. Word has length 84 [2022-12-14 14:05:59,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:05:59,752 INFO L495 AbstractCegarLoop]: Abstraction has 2344 states and 3697 transitions. [2022-12-14 14:05:59,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 14:05:59,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 3697 transitions. [2022-12-14 14:05:59,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-14 14:05:59,753 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:05:59,753 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 14:05:59,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 14:05:59,754 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:05:59,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:05:59,754 INFO L85 PathProgramCache]: Analyzing trace with hash 787605634, now seen corresponding path program 1 times [2022-12-14 14:05:59,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:05:59,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925380760] [2022-12-14 14:05:59,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:05:59,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:05:59,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:05:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 14:05:59,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:05:59,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925380760] [2022-12-14 14:05:59,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925380760] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:05:59,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:05:59,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:05:59,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035445169] [2022-12-14 14:05:59,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:05:59,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:05:59,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:05:59,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:05:59,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:05:59,863 INFO L87 Difference]: Start difference. First operand 2344 states and 3697 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 14:06:00,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:06:00,997 INFO L93 Difference]: Finished difference Result 7195 states and 11541 transitions. [2022-12-14 14:06:00,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:06:00,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 85 [2022-12-14 14:06:00,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:06:01,013 INFO L225 Difference]: With dead ends: 7195 [2022-12-14 14:06:01,013 INFO L226 Difference]: Without dead ends: 4870 [2022-12-14 14:06:01,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 14:06:01,020 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 1048 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1109 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 14:06:01,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1109 Valid, 682 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 846 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 14:06:01,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4870 states. [2022-12-14 14:06:01,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4870 to 4554. [2022-12-14 14:06:01,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4554 states, 3280 states have (on average 1.5484756097560977) internal successors, (5079), 3513 states have internal predecessors, (5079), 964 states have call successors, (964), 235 states have call predecessors, (964), 309 states have return successors, (1190), 896 states have call predecessors, (1190), 959 states have call successors, (1190) [2022-12-14 14:06:01,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4554 states to 4554 states and 7233 transitions. [2022-12-14 14:06:01,275 INFO L78 Accepts]: Start accepts. Automaton has 4554 states and 7233 transitions. Word has length 85 [2022-12-14 14:06:01,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:06:01,275 INFO L495 AbstractCegarLoop]: Abstraction has 4554 states and 7233 transitions. [2022-12-14 14:06:01,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 14:06:01,276 INFO L276 IsEmpty]: Start isEmpty. Operand 4554 states and 7233 transitions. [2022-12-14 14:06:01,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-14 14:06:01,278 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:06:01,279 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-14 14:06:01,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 14:06:01,279 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:06:01,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:06:01,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1052755315, now seen corresponding path program 1 times [2022-12-14 14:06:01,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:06:01,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426452898] [2022-12-14 14:06:01,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:06:01,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:06:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:06:01,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 14:06:01,428 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:06:01,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426452898] [2022-12-14 14:06:01,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426452898] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:06:01,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:06:01,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:06:01,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350715080] [2022-12-14 14:06:01,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:06:01,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:06:01,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:06:01,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:06:01,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:06:01,430 INFO L87 Difference]: Start difference. First operand 4554 states and 7233 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 14:06:02,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:06:02,634 INFO L93 Difference]: Finished difference Result 13885 states and 22609 transitions. [2022-12-14 14:06:02,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:06:02,635 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 83 [2022-12-14 14:06:02,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:06:02,671 INFO L225 Difference]: With dead ends: 13885 [2022-12-14 14:06:02,671 INFO L226 Difference]: Without dead ends: 9356 [2022-12-14 14:06:02,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 14:06:02,684 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 1041 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1103 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 14:06:02,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1103 Valid, 694 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 14:06:02,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9356 states. [2022-12-14 14:06:03,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9356 to 8888. [2022-12-14 14:06:03,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8888 states, 6423 states have (on average 1.5453837770512222) internal successors, (9926), 6912 states have internal predecessors, (9926), 1831 states have call successors, (1831), 459 states have call predecessors, (1831), 633 states have return successors, (2517), 1683 states have call predecessors, (2517), 1826 states have call successors, (2517) [2022-12-14 14:06:03,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8888 states to 8888 states and 14274 transitions. [2022-12-14 14:06:03,244 INFO L78 Accepts]: Start accepts. Automaton has 8888 states and 14274 transitions. Word has length 83 [2022-12-14 14:06:03,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:06:03,244 INFO L495 AbstractCegarLoop]: Abstraction has 8888 states and 14274 transitions. [2022-12-14 14:06:03,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 14:06:03,244 INFO L276 IsEmpty]: Start isEmpty. Operand 8888 states and 14274 transitions. [2022-12-14 14:06:03,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 14:06:03,246 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:06:03,246 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 14:06:03,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 14:06:03,246 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:06:03,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:06:03,246 INFO L85 PathProgramCache]: Analyzing trace with hash 961569284, now seen corresponding path program 1 times [2022-12-14 14:06:03,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:06:03,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604832260] [2022-12-14 14:06:03,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:06:03,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:06:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:06:03,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 14:06:03,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:06:03,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604832260] [2022-12-14 14:06:03,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604832260] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:06:03,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:06:03,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:06:03,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218938181] [2022-12-14 14:06:03,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:06:03,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:06:03,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:06:03,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:06:03,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:06:03,347 INFO L87 Difference]: Start difference. First operand 8888 states and 14274 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 14:06:05,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:06:05,309 INFO L93 Difference]: Finished difference Result 27035 states and 45273 transitions. [2022-12-14 14:06:05,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:06:05,310 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 87 [2022-12-14 14:06:05,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:06:05,389 INFO L225 Difference]: With dead ends: 27035 [2022-12-14 14:06:05,389 INFO L226 Difference]: Without dead ends: 18184 [2022-12-14 14:06:05,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 14:06:05,412 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 1022 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1081 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 14:06:05,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1081 Valid, 703 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 14:06:05,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18184 states. [2022-12-14 14:06:06,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18184 to 17398. [2022-12-14 14:06:06,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17398 states, 12578 states have (on average 1.539274924471299) internal successors, (19361), 13603 states have internal predecessors, (19361), 3514 states have call successors, (3514), 907 states have call predecessors, (3514), 1305 states have return successors, (5684), 3206 states have call predecessors, (5684), 3509 states have call successors, (5684) [2022-12-14 14:06:06,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17398 states to 17398 states and 28559 transitions. [2022-12-14 14:06:06,509 INFO L78 Accepts]: Start accepts. Automaton has 17398 states and 28559 transitions. Word has length 87 [2022-12-14 14:06:06,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:06:06,510 INFO L495 AbstractCegarLoop]: Abstraction has 17398 states and 28559 transitions. [2022-12-14 14:06:06,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 14:06:06,510 INFO L276 IsEmpty]: Start isEmpty. Operand 17398 states and 28559 transitions. [2022-12-14 14:06:06,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-14 14:06:06,512 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:06:06,512 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 14:06:06,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 14:06:06,512 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:06:06,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:06:06,512 INFO L85 PathProgramCache]: Analyzing trace with hash -256528106, now seen corresponding path program 1 times [2022-12-14 14:06:06,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:06:06,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433963918] [2022-12-14 14:06:06,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:06:06,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:06:06,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:06:06,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 14:06:06,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:06:06,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433963918] [2022-12-14 14:06:06,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433963918] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:06:06,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:06:06,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:06:06,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143565333] [2022-12-14 14:06:06,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:06:06,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:06:06,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:06:06,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:06:06,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:06:06,610 INFO L87 Difference]: Start difference. First operand 17398 states and 28559 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 14:06:09,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:06:09,560 INFO L93 Difference]: Finished difference Result 53027 states and 93549 transitions. [2022-12-14 14:06:09,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:06:09,560 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 88 [2022-12-14 14:06:09,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:06:09,716 INFO L225 Difference]: With dead ends: 53027 [2022-12-14 14:06:09,716 INFO L226 Difference]: Without dead ends: 35680 [2022-12-14 14:06:09,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 14:06:09,797 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 1013 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1071 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 14:06:09,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1071 Valid, 717 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 14:06:09,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35680 states. [2022-12-14 14:06:12,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35680 to 34044. [2022-12-14 14:06:12,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34044 states, 24665 states have (on average 1.5361037907966755) internal successors, (37888), 26717 states have internal predecessors, (37888), 6778 states have call successors, (6778), 1800 states have call predecessors, (6778), 2600 states have return successors, (13307), 6149 states have call predecessors, (13307), 6773 states have call successors, (13307) [2022-12-14 14:06:12,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34044 states to 34044 states and 57973 transitions. [2022-12-14 14:06:12,201 INFO L78 Accepts]: Start accepts. Automaton has 34044 states and 57973 transitions. Word has length 88 [2022-12-14 14:06:12,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:06:12,202 INFO L495 AbstractCegarLoop]: Abstraction has 34044 states and 57973 transitions. [2022-12-14 14:06:12,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 14:06:12,202 INFO L276 IsEmpty]: Start isEmpty. Operand 34044 states and 57973 transitions. [2022-12-14 14:06:12,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-12-14 14:06:12,205 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:06:12,206 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] [2022-12-14 14:06:12,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 14:06:12,206 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:06:12,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:06:12,206 INFO L85 PathProgramCache]: Analyzing trace with hash 2105110688, now seen corresponding path program 1 times [2022-12-14 14:06:12,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:06:12,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293097224] [2022-12-14 14:06:12,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:06:12,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:06:12,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:06:12,305 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 14:06:12,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:06:12,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293097224] [2022-12-14 14:06:12,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293097224] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:06:12,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97513005] [2022-12-14 14:06:12,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:06:12,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:06:12,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:06:12,307 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:06:12,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 14:06:12,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:06:12,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 1773 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:06:12,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:06:12,605 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 14:06:12,605 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:06:12,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97513005] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:06:12,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:06:12,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 14:06:12,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172142483] [2022-12-14 14:06:12,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:06:12,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:06:12,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:06:12,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:06:12,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:06:12,606 INFO L87 Difference]: Start difference. First operand 34044 states and 57973 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 14:06:15,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:06:15,127 INFO L93 Difference]: Finished difference Result 71815 states and 127334 transitions. [2022-12-14 14:06:15,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:06:15,128 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 127 [2022-12-14 14:06:15,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:06:15,316 INFO L225 Difference]: With dead ends: 71815 [2022-12-14 14:06:15,316 INFO L226 Difference]: Without dead ends: 37788 [2022-12-14 14:06:15,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 127 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 14:06:15,416 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 213 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1275 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:06:15,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1275 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:06:15,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37788 states. [2022-12-14 14:06:17,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37788 to 37788. [2022-12-14 14:06:17,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37788 states, 28313 states have (on average 1.5857026807473598) internal successors, (44896), 30365 states have internal predecessors, (44896), 6778 states have call successors, (6778), 1896 states have call predecessors, (6778), 2696 states have return successors, (13307), 6149 states have call predecessors, (13307), 6773 states have call successors, (13307) [2022-12-14 14:06:17,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37788 states to 37788 states and 64981 transitions. [2022-12-14 14:06:17,502 INFO L78 Accepts]: Start accepts. Automaton has 37788 states and 64981 transitions. Word has length 127 [2022-12-14 14:06:17,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:06:17,502 INFO L495 AbstractCegarLoop]: Abstraction has 37788 states and 64981 transitions. [2022-12-14 14:06:17,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 14:06:17,503 INFO L276 IsEmpty]: Start isEmpty. Operand 37788 states and 64981 transitions. [2022-12-14 14:06:17,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-12-14 14:06:17,506 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:06:17,506 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] [2022-12-14 14:06:17,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 14:06:17,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 14:06:17,707 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:06:17,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:06:17,707 INFO L85 PathProgramCache]: Analyzing trace with hash 609539209, now seen corresponding path program 1 times [2022-12-14 14:06:17,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:06:17,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894802319] [2022-12-14 14:06:17,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:06:17,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:06:17,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:06:18,429 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-12-14 14:06:18,430 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:06:18,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894802319] [2022-12-14 14:06:18,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894802319] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:06:18,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947304191] [2022-12-14 14:06:18,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:06:18,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:06:18,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:06:18,431 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:06:18,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 14:06:18,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:06:18,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 1778 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:06:18,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:06:18,759 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 14:06:18,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:06:18,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947304191] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:06:18,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:06:18,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-12-14 14:06:18,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989349097] [2022-12-14 14:06:18,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:06:18,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:06:18,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:06:18,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:06:18,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-12-14 14:06:18,762 INFO L87 Difference]: Start difference. First operand 37788 states and 64981 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 14:06:21,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:06:21,096 INFO L93 Difference]: Finished difference Result 79303 states and 141251 transitions. [2022-12-14 14:06:21,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:06:21,097 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 132 [2022-12-14 14:06:21,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:06:21,272 INFO L225 Difference]: With dead ends: 79303 [2022-12-14 14:06:21,272 INFO L226 Difference]: Without dead ends: 41532 [2022-12-14 14:06:21,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-12-14 14:06:21,391 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 211 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1275 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:06:21,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1275 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:06:21,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41532 states. [2022-12-14 14:06:23,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41532 to 41532. [2022-12-14 14:06:23,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41532 states, 31961 states have (on average 1.6239792246800788) internal successors, (51904), 34013 states have internal predecessors, (51904), 6778 states have call successors, (6778), 1992 states have call predecessors, (6778), 2792 states have return successors, (13307), 6149 states have call predecessors, (13307), 6773 states have call successors, (13307) [2022-12-14 14:06:23,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41532 states to 41532 states and 71989 transitions. [2022-12-14 14:06:23,685 INFO L78 Accepts]: Start accepts. Automaton has 41532 states and 71989 transitions. Word has length 132 [2022-12-14 14:06:23,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:06:23,685 INFO L495 AbstractCegarLoop]: Abstraction has 41532 states and 71989 transitions. [2022-12-14 14:06:23,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 14:06:23,685 INFO L276 IsEmpty]: Start isEmpty. Operand 41532 states and 71989 transitions. [2022-12-14 14:06:23,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 14:06:23,689 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:06:23,689 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] [2022-12-14 14:06:23,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 14:06:23,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 14:06:23,891 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:06:23,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:06:23,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1536593273, now seen corresponding path program 1 times [2022-12-14 14:06:23,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:06:23,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236861272] [2022-12-14 14:06:23,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:06:23,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:06:23,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:06:24,484 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-14 14:06:24,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:06:24,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236861272] [2022-12-14 14:06:24,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236861272] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:06:24,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939505838] [2022-12-14 14:06:24,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:06:24,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:06:24,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:06:24,486 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:06:24,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 14:06:24,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:06:24,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 1782 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:06:24,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:06:24,706 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 14:06:24,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:06:24,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939505838] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:06:24,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:06:24,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-12-14 14:06:24,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107105692] [2022-12-14 14:06:24,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:06:24,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:06:24,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:06:24,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:06:24,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-12-14 14:06:24,708 INFO L87 Difference]: Start difference. First operand 41532 states and 71989 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 14:06:26,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:06:26,611 INFO L93 Difference]: Finished difference Result 86791 states and 155168 transitions. [2022-12-14 14:06:26,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:06:26,612 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 136 [2022-12-14 14:06:26,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:06:26,827 INFO L225 Difference]: With dead ends: 86791 [2022-12-14 14:06:26,827 INFO L226 Difference]: Without dead ends: 45276 [2022-12-14 14:06:26,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-12-14 14:06:26,902 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 209 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1275 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:06:26,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1275 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:06:26,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45276 states. [2022-12-14 14:06:29,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45276 to 45276. [2022-12-14 14:06:29,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45276 states, 35609 states have (on average 1.654413210143503) internal successors, (58912), 37661 states have internal predecessors, (58912), 6778 states have call successors, (6778), 2088 states have call predecessors, (6778), 2888 states have return successors, (13307), 6149 states have call predecessors, (13307), 6773 states have call successors, (13307) [2022-12-14 14:06:29,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45276 states to 45276 states and 78997 transitions. [2022-12-14 14:06:29,407 INFO L78 Accepts]: Start accepts. Automaton has 45276 states and 78997 transitions. Word has length 136 [2022-12-14 14:06:29,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:06:29,407 INFO L495 AbstractCegarLoop]: Abstraction has 45276 states and 78997 transitions. [2022-12-14 14:06:29,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 14:06:29,407 INFO L276 IsEmpty]: Start isEmpty. Operand 45276 states and 78997 transitions. [2022-12-14 14:06:29,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-12-14 14:06:29,411 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:06:29,411 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] [2022-12-14 14:06:29,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 14:06:29,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 14:06:29,612 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:06:29,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:06:29,613 INFO L85 PathProgramCache]: Analyzing trace with hash -924646180, now seen corresponding path program 1 times [2022-12-14 14:06:29,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:06:29,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362966620] [2022-12-14 14:06:29,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:06:29,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:06:29,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:06:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 14:06:30,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:06:30,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362966620] [2022-12-14 14:06:30,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362966620] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:06:30,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425230651] [2022-12-14 14:06:30,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:06:30,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:06:30,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:06:30,187 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:06:30,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 14:06:30,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:06:30,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 1785 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:06:30,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:06:30,481 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 14:06:30,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:06:30,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425230651] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:06:30,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:06:30,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-12-14 14:06:30,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238534611] [2022-12-14 14:06:30,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:06:30,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:06:30,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:06:30,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:06:30,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-12-14 14:06:30,483 INFO L87 Difference]: Start difference. First operand 45276 states and 78997 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 14:06:32,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:06:32,523 INFO L93 Difference]: Finished difference Result 94279 states and 169085 transitions. [2022-12-14 14:06:32,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:06:32,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 139 [2022-12-14 14:06:32,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:06:32,678 INFO L225 Difference]: With dead ends: 94279 [2022-12-14 14:06:32,678 INFO L226 Difference]: Without dead ends: 49020 [2022-12-14 14:06:32,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-12-14 14:06:32,775 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 207 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1275 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:06:32,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1275 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:06:32,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49020 states. [2022-12-14 14:06:34,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49020 to 49020. [2022-12-14 14:06:34,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49020 states, 39257 states have (on average 1.6791909723106706) internal successors, (65920), 41309 states have internal predecessors, (65920), 6778 states have call successors, (6778), 2184 states have call predecessors, (6778), 2984 states have return successors, (13307), 6149 states have call predecessors, (13307), 6773 states have call successors, (13307) [2022-12-14 14:06:35,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49020 states to 49020 states and 86005 transitions. [2022-12-14 14:06:35,081 INFO L78 Accepts]: Start accepts. Automaton has 49020 states and 86005 transitions. Word has length 139 [2022-12-14 14:06:35,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:06:35,081 INFO L495 AbstractCegarLoop]: Abstraction has 49020 states and 86005 transitions. [2022-12-14 14:06:35,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 14:06:35,082 INFO L276 IsEmpty]: Start isEmpty. Operand 49020 states and 86005 transitions. [2022-12-14 14:06:35,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-12-14 14:06:35,085 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:06:35,086 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] [2022-12-14 14:06:35,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 14:06:35,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 14:06:35,287 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:06:35,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:06:35,289 INFO L85 PathProgramCache]: Analyzing trace with hash 34071338, now seen corresponding path program 1 times [2022-12-14 14:06:35,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:06:35,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882474791] [2022-12-14 14:06:35,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:06:35,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:06:35,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:06:35,869 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 14:06:35,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:06:35,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882474791] [2022-12-14 14:06:35,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882474791] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:06:35,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577642934] [2022-12-14 14:06:35,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:06:35,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:06:35,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:06:35,871 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:06:35,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 14:06:36,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:06:36,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 1781 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 14:06:36,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:06:36,091 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-14 14:06:36,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:06:36,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577642934] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:06:36,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:06:36,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-12-14 14:06:36,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067867590] [2022-12-14 14:06:36,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:06:36,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:06:36,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:06:36,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:06:36,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-12-14 14:06:36,092 INFO L87 Difference]: Start difference. First operand 49020 states and 86005 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 1 states have call successors, (20) [2022-12-14 14:06:38,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:06:38,269 INFO L93 Difference]: Finished difference Result 50928 states and 94450 transitions. [2022-12-14 14:06:38,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:06:38,270 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 1 states have call successors, (20) Word has length 141 [2022-12-14 14:06:38,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:06:38,470 INFO L225 Difference]: With dead ends: 50928 [2022-12-14 14:06:38,470 INFO L226 Difference]: Without dead ends: 50771 [2022-12-14 14:06:38,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-12-14 14:06:38,501 INFO L413 NwaCegarLoop]: 535 mSDtfsCounter, 44 mSDsluCounter, 1019 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1554 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:06:38,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1554 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:06:38,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50771 states. [2022-12-14 14:06:40,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50771 to 49206. [2022-12-14 14:06:40,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49206 states, 39443 states have (on average 1.6759881347767664) internal successors, (66106), 41495 states have internal predecessors, (66106), 6778 states have call successors, (6778), 2184 states have call predecessors, (6778), 2984 states have return successors, (13307), 6149 states have call predecessors, (13307), 6773 states have call successors, (13307) [2022-12-14 14:06:40,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49206 states to 49206 states and 86191 transitions. [2022-12-14 14:06:40,880 INFO L78 Accepts]: Start accepts. Automaton has 49206 states and 86191 transitions. Word has length 141 [2022-12-14 14:06:40,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:06:40,880 INFO L495 AbstractCegarLoop]: Abstraction has 49206 states and 86191 transitions. [2022-12-14 14:06:40,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 1 states have call successors, (20) [2022-12-14 14:06:40,880 INFO L276 IsEmpty]: Start isEmpty. Operand 49206 states and 86191 transitions. [2022-12-14 14:06:40,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-12-14 14:06:40,892 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:06:40,892 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 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] [2022-12-14 14:06:40,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 14:06:41,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:06:41,093 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:06:41,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:06:41,095 INFO L85 PathProgramCache]: Analyzing trace with hash -2048540232, now seen corresponding path program 1 times [2022-12-14 14:06:41,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:06:41,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886754735] [2022-12-14 14:06:41,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:06:41,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:06:41,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:06:41,810 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-14 14:06:41,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:06:41,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886754735] [2022-12-14 14:06:41,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886754735] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:06:41,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498176826] [2022-12-14 14:06:41,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:06:41,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:06:41,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:06:41,811 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:06:41,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 14:06:42,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:06:42,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 1845 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 14:06:42,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:06:42,575 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-12-14 14:06:42,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:06:42,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498176826] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:06:42,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:06:42,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [18] total 27 [2022-12-14 14:06:42,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875564172] [2022-12-14 14:06:42,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:06:42,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 14:06:42,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:06:42,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 14:06:42,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-12-14 14:06:42,578 INFO L87 Difference]: Start difference. First operand 49206 states and 86191 transitions. Second operand has 11 states, 11 states have (on average 8.0) internal successors, (88), 11 states have internal predecessors, (88), 5 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2022-12-14 14:06:47,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:06:47,874 INFO L93 Difference]: Finished difference Result 141965 states and 258732 transitions. [2022-12-14 14:06:47,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 14:06:47,874 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.0) internal successors, (88), 11 states have internal predecessors, (88), 5 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) Word has length 164 [2022-12-14 14:06:47,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:06:48,147 INFO L225 Difference]: With dead ends: 141965 [2022-12-14 14:06:48,147 INFO L226 Difference]: Without dead ends: 92744 [2022-12-14 14:06:48,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2022-12-14 14:06:48,258 INFO L413 NwaCegarLoop]: 456 mSDtfsCounter, 1496 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 3741 mSolverCounterSat, 611 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1620 SdHoareTripleChecker+Valid, 1494 SdHoareTripleChecker+Invalid, 4352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 611 IncrementalHoareTripleChecker+Valid, 3741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 14:06:48,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1620 Valid, 1494 Invalid, 4352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [611 Valid, 3741 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 14:06:48,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92744 states. [2022-12-14 14:06:52,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92744 to 90014. [2022-12-14 14:06:52,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90014 states, 73150 states have (on average 1.6976213260423787) internal successors, (124181), 76482 states have internal predecessors, (124181), 12099 states have call successors, (12099), 3807 states have call predecessors, (12099), 4764 states have return successors, (20014), 10929 states have call predecessors, (20014), 12094 states have call successors, (20014) [2022-12-14 14:06:52,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90014 states to 90014 states and 156294 transitions. [2022-12-14 14:06:52,469 INFO L78 Accepts]: Start accepts. Automaton has 90014 states and 156294 transitions. Word has length 164 [2022-12-14 14:06:52,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:06:52,470 INFO L495 AbstractCegarLoop]: Abstraction has 90014 states and 156294 transitions. [2022-12-14 14:06:52,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.0) internal successors, (88), 11 states have internal predecessors, (88), 5 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2022-12-14 14:06:52,470 INFO L276 IsEmpty]: Start isEmpty. Operand 90014 states and 156294 transitions. [2022-12-14 14:06:52,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-12-14 14:06:52,479 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:06:52,479 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 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 14:06:52,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 14:06:52,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:06:52,680 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:06:52,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:06:52,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1375479147, now seen corresponding path program 1 times [2022-12-14 14:06:52,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:06:52,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023986377] [2022-12-14 14:06:52,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:06:52,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:06:52,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:06:53,515 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-14 14:06:53,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:06:53,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023986377] [2022-12-14 14:06:53,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023986377] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:06:53,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074148353] [2022-12-14 14:06:53,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:06:53,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:06:53,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:06:53,516 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:06:53,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 14:06:53,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:06:53,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 1861 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 14:06:53,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:06:54,343 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-12-14 14:06:54,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:06:54,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074148353] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:06:54,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:06:54,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [18] total 29 [2022-12-14 14:06:54,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87535264] [2022-12-14 14:06:54,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:06:54,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 14:06:54,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:06:54,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 14:06:54,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2022-12-14 14:06:54,345 INFO L87 Difference]: Start difference. First operand 90014 states and 156294 transitions. Second operand has 13 states, 13 states have (on average 7.538461538461538) internal successors, (98), 13 states have internal predecessors, (98), 6 states have call successors, (26), 5 states have call predecessors, (26), 5 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) [2022-12-14 14:07:03,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:07:03,336 INFO L93 Difference]: Finished difference Result 247934 states and 424697 transitions. [2022-12-14 14:07:03,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 14:07:03,338 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.538461538461538) internal successors, (98), 13 states have internal predecessors, (98), 6 states have call successors, (26), 5 states have call predecessors, (26), 5 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) Word has length 167 [2022-12-14 14:07:03,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:07:04,056 INFO L225 Difference]: With dead ends: 247934 [2022-12-14 14:07:04,056 INFO L226 Difference]: Without dead ends: 157260 [2022-12-14 14:07:04,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=266, Invalid=1804, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 14:07:04,248 INFO L413 NwaCegarLoop]: 436 mSDtfsCounter, 1433 mSDsluCounter, 2056 mSDsCounter, 0 mSdLazyCounter, 5026 mSolverCounterSat, 551 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1524 SdHoareTripleChecker+Valid, 2492 SdHoareTripleChecker+Invalid, 5577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 551 IncrementalHoareTripleChecker+Valid, 5026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:07:04,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1524 Valid, 2492 Invalid, 5577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [551 Valid, 5026 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-12-14 14:07:04,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157260 states. [2022-12-14 14:07:11,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157260 to 138940. [2022-12-14 14:07:11,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138940 states, 107710 states have (on average 1.5782564293009005) internal successors, (169994), 114758 states have internal predecessors, (169994), 22063 states have call successors, (22063), 6791 states have call predecessors, (22063), 9166 states have return successors, (39808), 19777 states have call predecessors, (39808), 22058 states have call successors, (39808) [2022-12-14 14:07:11,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138940 states to 138940 states and 231865 transitions. [2022-12-14 14:07:11,718 INFO L78 Accepts]: Start accepts. Automaton has 138940 states and 231865 transitions. Word has length 167 [2022-12-14 14:07:11,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:07:11,718 INFO L495 AbstractCegarLoop]: Abstraction has 138940 states and 231865 transitions. [2022-12-14 14:07:11,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.538461538461538) internal successors, (98), 13 states have internal predecessors, (98), 6 states have call successors, (26), 5 states have call predecessors, (26), 5 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) [2022-12-14 14:07:11,718 INFO L276 IsEmpty]: Start isEmpty. Operand 138940 states and 231865 transitions. [2022-12-14 14:07:11,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-12-14 14:07:11,723 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:07:11,723 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 3, 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] [2022-12-14 14:07:11,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 14:07:11,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:07:11,925 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:07:11,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:07:11,926 INFO L85 PathProgramCache]: Analyzing trace with hash 966314295, now seen corresponding path program 1 times [2022-12-14 14:07:11,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:07:11,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261442587] [2022-12-14 14:07:11,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:07:11,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:07:11,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:07:12,680 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-12-14 14:07:12,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:07:12,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261442587] [2022-12-14 14:07:12,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261442587] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:07:12,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605478955] [2022-12-14 14:07:12,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:07:12,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:07:12,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:07:12,681 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:07:12,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 14:07:12,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:07:12,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 1867 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:07:12,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:07:12,938 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-14 14:07:12,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:07:12,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605478955] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:07:12,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:07:12,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-12-14 14:07:12,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005764962] [2022-12-14 14:07:12,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:07:12,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:07:12,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:07:12,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:07:12,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-12-14 14:07:12,939 INFO L87 Difference]: Start difference. First operand 138940 states and 231865 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-12-14 14:07:19,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:07:19,414 INFO L93 Difference]: Finished difference Result 287688 states and 482292 transitions. [2022-12-14 14:07:19,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:07:19,415 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 167 [2022-12-14 14:07:19,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:07:19,943 INFO L225 Difference]: With dead ends: 287688 [2022-12-14 14:07:19,943 INFO L226 Difference]: Without dead ends: 148765 [2022-12-14 14:07:20,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-12-14 14:07:20,333 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 205 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1275 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:07:20,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 1275 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:07:20,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148765 states. [2022-12-14 14:07:27,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148765 to 148765. [2022-12-14 14:07:27,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148765 states, 116956 states have (on average 1.590153562023325) internal successors, (185978), 124196 states have internal predecessors, (185978), 22063 states have call successors, (22063), 7178 states have call predecessors, (22063), 9745 states have return successors, (39808), 19777 states have call predecessors, (39808), 22058 states have call successors, (39808) [2022-12-14 14:07:28,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148765 states to 148765 states and 247849 transitions. [2022-12-14 14:07:28,112 INFO L78 Accepts]: Start accepts. Automaton has 148765 states and 247849 transitions. Word has length 167 [2022-12-14 14:07:28,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:07:28,112 INFO L495 AbstractCegarLoop]: Abstraction has 148765 states and 247849 transitions. [2022-12-14 14:07:28,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-12-14 14:07:28,112 INFO L276 IsEmpty]: Start isEmpty. Operand 148765 states and 247849 transitions. [2022-12-14 14:07:28,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-12-14 14:07:28,116 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:07:28,117 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 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, 1, 1, 1, 1] [2022-12-14 14:07:28,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 14:07:28,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:07:28,317 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:07:28,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:07:28,318 INFO L85 PathProgramCache]: Analyzing trace with hash -27804972, now seen corresponding path program 1 times [2022-12-14 14:07:28,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:07:28,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018420499] [2022-12-14 14:07:28,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:07:28,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:07:28,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:07:28,921 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-12-14 14:07:28,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:07:28,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018420499] [2022-12-14 14:07:28,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018420499] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:07:28,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14672388] [2022-12-14 14:07:28,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:07:28,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:07:28,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:07:28,922 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:07:28,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2ce89dc-34d1-4de9-aa50-782723fa0c2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 14:07:29,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:07:29,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 1868 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-14 14:07:29,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:07:29,770 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-12-14 14:07:29,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:07:31,564 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 14:07:37,571 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 14:07:37,719 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 49188 disjunctions. This might take some time... [2022-12-14 14:10:09,833 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 49188 disjunctions. [2022-12-14 14:10:10,218 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 14:10:16,750 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions.