./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/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_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/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_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/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 4d9d31939acfea5ee9b43b1f06257671943c7251c27c351c5e445aa6495fd098 --- 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 10:41:30,553 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:41:30,555 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:41:30,575 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:41:30,575 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:41:30,576 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:41:30,577 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:41:30,579 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:41:30,581 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:41:30,582 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:41:30,583 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:41:30,584 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:41:30,584 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:41:30,585 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:41:30,586 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:41:30,588 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:41:30,588 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:41:30,589 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:41:30,591 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:41:30,593 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:41:30,594 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:41:30,596 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:41:30,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:41:30,598 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:41:30,602 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:41:30,602 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:41:30,602 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:41:30,603 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:41:30,604 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:41:30,605 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:41:30,605 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:41:30,606 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:41:30,607 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:41:30,608 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:41:30,608 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:41:30,609 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:41:30,609 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:41:30,609 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:41:30,610 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:41:30,611 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:41:30,611 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:41:30,612 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 10:41:30,635 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:41:30,635 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:41:30,635 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:41:30,636 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:41:30,636 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:41:30,636 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:41:30,637 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:41:30,637 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:41:30,637 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:41:30,637 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 10:41:30,637 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:41:30,638 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:41:30,638 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 10:41:30,638 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 10:41:30,638 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:41:30,638 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 10:41:30,639 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 10:41:30,639 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 10:41:30,639 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:41:30,639 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:41:30,640 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:41:30,640 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:41:30,640 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:41:30,640 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 10:41:30,640 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:41:30,640 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 10:41:30,640 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:41:30,641 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 10:41:30,641 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:41:30,641 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 10:41:30,641 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:41:30,641 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:41:30,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:41:30,642 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:41:30,642 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 10:41:30,642 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:41:30,642 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 10:41:30,642 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 10:41:30,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 10:41:30,643 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 10:41:30,643 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:41:30,643 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_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d9d31939acfea5ee9b43b1f06257671943c7251c27c351c5e445aa6495fd098 [2022-12-14 10:41:30,826 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:41:30,846 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:41:30,848 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:41:30,849 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:41:30,850 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:41:30,850 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c [2022-12-14 10:41:33,331 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:41:33,558 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:41:33,558 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c [2022-12-14 10:41:33,571 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/data/b2ac2b325/08ffecf7c6104df593928b08322407b3/FLAGffda99e25 [2022-12-14 10:41:33,928 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/data/b2ac2b325/08ffecf7c6104df593928b08322407b3 [2022-12-14 10:41:33,935 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:41:33,939 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:41:33,942 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:41:33,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:41:33,949 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:41:33,950 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:41:33" (1/1) ... [2022-12-14 10:41:33,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1522999f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:33, skipping insertion in model container [2022-12-14 10:41:33,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:41:33" (1/1) ... [2022-12-14 10:41:33,961 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:41:34,004 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:41:34,236 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_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c[38051,38064] [2022-12-14 10:41:34,304 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:41:34,312 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:41:34,355 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_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c[38051,38064] [2022-12-14 10:41:34,382 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:41:34,399 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:41:34,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:34 WrapperNode [2022-12-14 10:41:34,400 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:41:34,400 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:41:34,400 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:41:34,400 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:41:34,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:34" (1/1) ... [2022-12-14 10:41:34,421 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:34" (1/1) ... [2022-12-14 10:41:34,449 INFO L138 Inliner]: procedures = 92, calls = 338, calls flagged for inlining = 26, calls inlined = 22, statements flattened = 817 [2022-12-14 10:41:34,450 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:41:34,450 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:41:34,450 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:41:34,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:41:34,458 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:34" (1/1) ... [2022-12-14 10:41:34,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:34" (1/1) ... [2022-12-14 10:41:34,461 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:34" (1/1) ... [2022-12-14 10:41:34,462 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:34" (1/1) ... [2022-12-14 10:41:34,483 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:34" (1/1) ... [2022-12-14 10:41:34,491 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:34" (1/1) ... [2022-12-14 10:41:34,494 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:34" (1/1) ... [2022-12-14 10:41:34,496 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:34" (1/1) ... [2022-12-14 10:41:34,520 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:41:34,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:41:34,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:41:34,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:41:34,521 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:34" (1/1) ... [2022-12-14 10:41:34,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:41:34,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:41:34,550 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:41:34,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:41:34,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 10:41:34,585 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-12-14 10:41:34,585 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-12-14 10:41:34,585 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-12-14 10:41:34,586 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-12-14 10:41:34,586 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 10:41:34,586 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 10:41:34,586 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 10:41:34,586 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 10:41:34,586 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 10:41:34,586 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 10:41:34,587 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 10:41:34,587 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 10:41:34,587 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 10:41:34,587 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 10:41:34,587 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-12-14 10:41:34,587 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-12-14 10:41:34,587 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 10:41:34,588 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 10:41:34,588 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 10:41:34,588 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 10:41:34,588 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 10:41:34,588 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 10:41:34,588 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 10:41:34,588 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 10:41:34,589 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 10:41:34,589 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 10:41:34,589 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 10:41:34,589 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 10:41:34,589 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 10:41:34,589 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 10:41:34,589 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 10:41:34,590 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 10:41:34,590 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 10:41:34,590 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 10:41:34,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 10:41:34,590 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__weight [2022-12-14 10:41:34,590 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__weight [2022-12-14 10:41:34,591 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 10:41:34,591 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 10:41:34,591 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 10:41:34,591 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 10:41:34,591 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 10:41:34,591 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 10:41:34,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:41:34,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:41:34,592 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 10:41:34,592 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 10:41:34,710 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:41:34,713 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:41:35,483 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:41:35,948 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:41:35,948 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 10:41:35,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:41:35 BoogieIcfgContainer [2022-12-14 10:41:35,951 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:41:35,952 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:41:35,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:41:35,955 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:41:35,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:41:33" (1/3) ... [2022-12-14 10:41:35,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@475f0457 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:41:35, skipping insertion in model container [2022-12-14 10:41:35,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:41:34" (2/3) ... [2022-12-14 10:41:35,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@475f0457 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:41:35, skipping insertion in model container [2022-12-14 10:41:35,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:41:35" (3/3) ... [2022-12-14 10:41:35,957 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product18.cil.c [2022-12-14 10:41:35,972 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:41:35,973 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 10:41:36,014 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:41:36,019 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;@5c5baf35, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:41:36,019 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 10:41:36,024 INFO L276 IsEmpty]: Start isEmpty. Operand has 356 states, 241 states have (on average 1.6182572614107884) internal successors, (390), 264 states have internal predecessors, (390), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 84 states have call predecessors, (91), 91 states have call successors, (91) [2022-12-14 10:41:36,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 10:41:36,038 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:41:36,039 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] [2022-12-14 10:41:36,039 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:41:36,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:41:36,044 INFO L85 PathProgramCache]: Analyzing trace with hash 907028854, now seen corresponding path program 1 times [2022-12-14 10:41:36,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:41:36,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793490162] [2022-12-14 10:41:36,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:36,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:41:36,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:36,366 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 10:41:36,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:41:36,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793490162] [2022-12-14 10:41:36,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793490162] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:41:36,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:41:36,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 10:41:36,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468249829] [2022-12-14 10:41:36,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:41:36,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 10:41:36,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:41:36,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 10:41:36,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 10:41:36,401 INFO L87 Difference]: Start difference. First operand has 356 states, 241 states have (on average 1.6182572614107884) internal successors, (390), 264 states have internal predecessors, (390), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 84 states have call predecessors, (91), 91 states have call successors, (91) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 10:41:36,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:41:36,541 INFO L93 Difference]: Finished difference Result 374 states and 599 transitions. [2022-12-14 10:41:36,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 10:41:36,544 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2022-12-14 10:41:36,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:41:36,559 INFO L225 Difference]: With dead ends: 374 [2022-12-14 10:41:36,559 INFO L226 Difference]: Without dead ends: 352 [2022-12-14 10:41:36,562 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 10:41:36,566 INFO L413 NwaCegarLoop]: 530 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:41:36,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 530 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:41:36,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-12-14 10:41:36,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2022-12-14 10:41:36,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 239 states have (on average 1.606694560669456) internal successors, (384), 260 states have internal predecessors, (384), 91 states have call successors, (91), 22 states have call predecessors, (91), 21 states have return successors, (86), 83 states have call predecessors, (86), 86 states have call successors, (86) [2022-12-14 10:41:36,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 561 transitions. [2022-12-14 10:41:36,639 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 561 transitions. Word has length 39 [2022-12-14 10:41:36,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:41:36,641 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 561 transitions. [2022-12-14 10:41:36,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 10:41:36,641 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 561 transitions. [2022-12-14 10:41:36,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 10:41:36,645 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:41:36,645 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] [2022-12-14 10:41:36,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 10:41:36,645 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:41:36,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:41:36,646 INFO L85 PathProgramCache]: Analyzing trace with hash 2115609871, now seen corresponding path program 1 times [2022-12-14 10:41:36,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:41:36,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904240317] [2022-12-14 10:41:36,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:36,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:41:36,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:37,006 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 10:41:37,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:41:37,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904240317] [2022-12-14 10:41:37,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904240317] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:41:37,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:41:37,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 10:41:37,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035251485] [2022-12-14 10:41:37,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:41:37,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:41:37,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:41:37,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:41:37,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:41:37,010 INFO L87 Difference]: Start difference. First operand 352 states and 561 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 10:41:38,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:41:38,542 INFO L93 Difference]: Finished difference Result 1156 states and 1884 transitions. [2022-12-14 10:41:38,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 10:41:38,543 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2022-12-14 10:41:38,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:41:38,549 INFO L225 Difference]: With dead ends: 1156 [2022-12-14 10:41:38,549 INFO L226 Difference]: Without dead ends: 820 [2022-12-14 10:41:38,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:41:38,553 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 1162 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 1545 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1222 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 1954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 1545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:41:38,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1222 Valid, 1064 Invalid, 1954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 1545 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 10:41:38,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2022-12-14 10:41:38,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 733. [2022-12-14 10:41:38,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 521 states have (on average 1.6314779270633397) internal successors, (850), 551 states have internal predecessors, (850), 174 states have call successors, (174), 36 states have call predecessors, (174), 37 states have return successors, (176), 158 states have call predecessors, (176), 169 states have call successors, (176) [2022-12-14 10:41:38,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1200 transitions. [2022-12-14 10:41:38,602 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1200 transitions. Word has length 40 [2022-12-14 10:41:38,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:41:38,602 INFO L495 AbstractCegarLoop]: Abstraction has 733 states and 1200 transitions. [2022-12-14 10:41:38,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 10:41:38,602 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1200 transitions. [2022-12-14 10:41:38,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-14 10:41:38,607 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:41:38,607 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] [2022-12-14 10:41:38,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 10:41:38,607 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:41:38,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:41:38,608 INFO L85 PathProgramCache]: Analyzing trace with hash 659747443, now seen corresponding path program 1 times [2022-12-14 10:41:38,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:41:38,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984784550] [2022-12-14 10:41:38,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:38,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:41:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:38,848 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 10:41:38,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:41:38,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984784550] [2022-12-14 10:41:38,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984784550] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:41:38,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:41:38,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 10:41:38,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687676144] [2022-12-14 10:41:38,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:41:38,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 10:41:38,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:41:38,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 10:41:38,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:41:38,851 INFO L87 Difference]: Start difference. First operand 733 states and 1200 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 10:41:40,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:41:40,483 INFO L93 Difference]: Finished difference Result 2499 states and 4138 transitions. [2022-12-14 10:41:40,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 10:41:40,483 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 62 [2022-12-14 10:41:40,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:41:40,496 INFO L225 Difference]: With dead ends: 2499 [2022-12-14 10:41:40,496 INFO L226 Difference]: Without dead ends: 1783 [2022-12-14 10:41:40,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 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 10:41:40,500 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 1639 mSDsluCounter, 1329 mSDsCounter, 0 mSdLazyCounter, 2520 mSolverCounterSat, 517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1702 SdHoareTripleChecker+Valid, 1717 SdHoareTripleChecker+Invalid, 3037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 517 IncrementalHoareTripleChecker+Valid, 2520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:41:40,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1702 Valid, 1717 Invalid, 3037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [517 Valid, 2520 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 10:41:40,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2022-12-14 10:41:40,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 1696. [2022-12-14 10:41:40,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1233 states have (on average 1.64882400648824) internal successors, (2033), 1293 states have internal predecessors, (2033), 376 states have call successors, (376), 75 states have call predecessors, (376), 86 states have return successors, (403), 351 states have call predecessors, (403), 371 states have call successors, (403) [2022-12-14 10:41:40,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 2812 transitions. [2022-12-14 10:41:40,579 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 2812 transitions. Word has length 62 [2022-12-14 10:41:40,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:41:40,579 INFO L495 AbstractCegarLoop]: Abstraction has 1696 states and 2812 transitions. [2022-12-14 10:41:40,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 10:41:40,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 2812 transitions. [2022-12-14 10:41:40,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-14 10:41:40,581 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:41:40,582 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:41:40,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 10:41:40,582 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:41:40,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:41:40,582 INFO L85 PathProgramCache]: Analyzing trace with hash -621981638, now seen corresponding path program 1 times [2022-12-14 10:41:40,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:41:40,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603285893] [2022-12-14 10:41:40,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:40,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:41:40,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:40,700 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 10:41:40,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:41:40,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603285893] [2022-12-14 10:41:40,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603285893] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:41:40,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:41:40,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 10:41:40,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134755662] [2022-12-14 10:41:40,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:41:40,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:41:40,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:41:40,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:41:40,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:41:40,703 INFO L87 Difference]: Start difference. First operand 1696 states and 2812 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2022-12-14 10:41:40,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:41:40,891 INFO L93 Difference]: Finished difference Result 2734 states and 4540 transitions. [2022-12-14 10:41:40,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:41:40,891 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 66 [2022-12-14 10:41:40,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:41:40,902 INFO L225 Difference]: With dead ends: 2734 [2022-12-14 10:41:40,902 INFO L226 Difference]: Without dead ends: 1736 [2022-12-14 10:41:40,908 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 10:41:40,909 INFO L413 NwaCegarLoop]: 529 mSDtfsCounter, 7 mSDsluCounter, 1552 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2081 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:41:40,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2081 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:41:40,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2022-12-14 10:41:41,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1720. [2022-12-14 10:41:41,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1720 states, 1251 states have (on average 1.6394884092725819) internal successors, (2051), 1311 states have internal predecessors, (2051), 376 states have call successors, (376), 75 states have call predecessors, (376), 92 states have return successors, (415), 357 states have call predecessors, (415), 371 states have call successors, (415) [2022-12-14 10:41:41,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 2842 transitions. [2022-12-14 10:41:41,023 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 2842 transitions. Word has length 66 [2022-12-14 10:41:41,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:41:41,023 INFO L495 AbstractCegarLoop]: Abstraction has 1720 states and 2842 transitions. [2022-12-14 10:41:41,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2022-12-14 10:41:41,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 2842 transitions. [2022-12-14 10:41:41,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 10:41:41,026 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:41:41,026 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:41:41,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 10:41:41,027 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:41:41,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:41:41,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1020169314, now seen corresponding path program 1 times [2022-12-14 10:41:41,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:41:41,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204103026] [2022-12-14 10:41:41,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:41,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:41:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:41,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:41:41,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:41:41,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204103026] [2022-12-14 10:41:41,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204103026] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:41:41,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:41:41,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 10:41:41,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593372160] [2022-12-14 10:41:41,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:41:41,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 10:41:41,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:41:41,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 10:41:41,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:41:41,318 INFO L87 Difference]: Start difference. First operand 1720 states and 2842 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 6 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 10:41:43,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:41:43,058 INFO L93 Difference]: Finished difference Result 3888 states and 6426 transitions. [2022-12-14 10:41:43,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 10:41:43,058 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 6 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) Word has length 70 [2022-12-14 10:41:43,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:41:43,068 INFO L225 Difference]: With dead ends: 3888 [2022-12-14 10:41:43,068 INFO L226 Difference]: Without dead ends: 2674 [2022-12-14 10:41:43,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-12-14 10:41:43,073 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 2144 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 2133 mSolverCounterSat, 938 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2292 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 3071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 938 IncrementalHoareTripleChecker+Valid, 2133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:41:43,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2292 Valid, 1208 Invalid, 3071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [938 Valid, 2133 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 10:41:43,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2674 states. [2022-12-14 10:41:43,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2674 to 2508. [2022-12-14 10:41:43,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2508 states, 1796 states have (on average 1.596325167037862) internal successors, (2867), 1887 states have internal predecessors, (2867), 560 states have call successors, (560), 122 states have call predecessors, (560), 151 states have return successors, (635), 533 states have call predecessors, (635), 555 states have call successors, (635) [2022-12-14 10:41:43,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 4062 transitions. [2022-12-14 10:41:43,213 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 4062 transitions. Word has length 70 [2022-12-14 10:41:43,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:41:43,213 INFO L495 AbstractCegarLoop]: Abstraction has 2508 states and 4062 transitions. [2022-12-14 10:41:43,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 6 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 10:41:43,214 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 4062 transitions. [2022-12-14 10:41:43,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 10:41:43,216 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:41:43,216 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:41:43,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 10:41:43,216 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:41:43,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:41:43,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1540961687, now seen corresponding path program 1 times [2022-12-14 10:41:43,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:41:43,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850164184] [2022-12-14 10:41:43,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:43,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:41:43,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:43,388 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 10:41:43,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:41:43,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850164184] [2022-12-14 10:41:43,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850164184] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:41:43,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:41:43,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 10:41:43,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141826883] [2022-12-14 10:41:43,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:41:43,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:41:43,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:41:43,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:41:43,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:41:43,390 INFO L87 Difference]: Start difference. First operand 2508 states and 4062 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 10:41:43,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:41:43,668 INFO L93 Difference]: Finished difference Result 4798 states and 7886 transitions. [2022-12-14 10:41:43,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:41:43,668 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 73 [2022-12-14 10:41:43,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:41:43,679 INFO L225 Difference]: With dead ends: 4798 [2022-12-14 10:41:43,679 INFO L226 Difference]: Without dead ends: 2508 [2022-12-14 10:41:43,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 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 10:41:43,687 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 221 mSDsluCounter, 1419 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1972 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:41:43,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 1972 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:41:43,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2508 states. [2022-12-14 10:41:43,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2508 to 2508. [2022-12-14 10:41:43,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2508 states, 1796 states have (on average 1.5606904231625836) internal successors, (2803), 1887 states have internal predecessors, (2803), 560 states have call successors, (560), 122 states have call predecessors, (560), 151 states have return successors, (635), 533 states have call predecessors, (635), 555 states have call successors, (635) [2022-12-14 10:41:43,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 3998 transitions. [2022-12-14 10:41:43,819 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 3998 transitions. Word has length 73 [2022-12-14 10:41:43,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:41:43,819 INFO L495 AbstractCegarLoop]: Abstraction has 2508 states and 3998 transitions. [2022-12-14 10:41:43,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 10:41:43,820 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 3998 transitions. [2022-12-14 10:41:43,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-14 10:41:43,822 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:41:43,822 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:41:43,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 10:41:43,822 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:41:43,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:41:43,823 INFO L85 PathProgramCache]: Analyzing trace with hash 188678975, now seen corresponding path program 1 times [2022-12-14 10:41:43,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:41:43,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067323984] [2022-12-14 10:41:43,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:43,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:41:43,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:44,019 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 10:41:44,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:41:44,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067323984] [2022-12-14 10:41:44,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067323984] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:41:44,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:41:44,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 10:41:44,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787746171] [2022-12-14 10:41:44,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:41:44,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 10:41:44,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:41:44,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 10:41:44,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:41:44,022 INFO L87 Difference]: Start difference. First operand 2508 states and 3998 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 10:41:45,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:41:45,377 INFO L93 Difference]: Finished difference Result 4777 states and 7638 transitions. [2022-12-14 10:41:45,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 10:41:45,378 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) Word has length 75 [2022-12-14 10:41:45,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:41:45,396 INFO L225 Difference]: With dead ends: 4777 [2022-12-14 10:41:45,396 INFO L226 Difference]: Without dead ends: 2889 [2022-12-14 10:41:45,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-14 10:41:45,406 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 930 mSDsluCounter, 1204 mSDsCounter, 0 mSdLazyCounter, 2324 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1000 SdHoareTripleChecker+Valid, 1569 SdHoareTripleChecker+Invalid, 2704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 2324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:41:45,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1000 Valid, 1569 Invalid, 2704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 2324 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 10:41:45,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2889 states. [2022-12-14 10:41:45,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2889 to 2562. [2022-12-14 10:41:45,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2562 states, 1832 states have (on average 1.5540393013100438) internal successors, (2847), 1931 states have internal predecessors, (2847), 562 states have call successors, (562), 132 states have call predecessors, (562), 167 states have return successors, (657), 533 states have call predecessors, (657), 557 states have call successors, (657) [2022-12-14 10:41:45,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2562 states to 2562 states and 4066 transitions. [2022-12-14 10:41:45,526 INFO L78 Accepts]: Start accepts. Automaton has 2562 states and 4066 transitions. Word has length 75 [2022-12-14 10:41:45,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:41:45,526 INFO L495 AbstractCegarLoop]: Abstraction has 2562 states and 4066 transitions. [2022-12-14 10:41:45,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 10:41:45,526 INFO L276 IsEmpty]: Start isEmpty. Operand 2562 states and 4066 transitions. [2022-12-14 10:41:45,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-14 10:41:45,528 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:41:45,528 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:41:45,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 10:41:45,528 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:41:45,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:41:45,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1376582778, now seen corresponding path program 1 times [2022-12-14 10:41:45,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:41:45,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413221370] [2022-12-14 10:41:45,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:45,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:41:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:45,686 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 10:41:45,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:41:45,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413221370] [2022-12-14 10:41:45,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413221370] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:41:45,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:41:45,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 10:41:45,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429316883] [2022-12-14 10:41:45,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:41:45,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:41:45,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:41:45,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:41:45,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:41:45,689 INFO L87 Difference]: Start difference. First operand 2562 states and 4066 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 10:41:46,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:41:46,179 INFO L93 Difference]: Finished difference Result 2662 states and 4229 transitions. [2022-12-14 10:41:46,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:41:46,179 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 82 [2022-12-14 10:41:46,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:41:46,190 INFO L225 Difference]: With dead ends: 2662 [2022-12-14 10:41:46,190 INFO L226 Difference]: Without dead ends: 2647 [2022-12-14 10:41:46,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:41:46,192 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 645 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 1704 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:41:46,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [646 Valid, 1704 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:41:46,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2647 states. [2022-12-14 10:41:46,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2647 to 2568. [2022-12-14 10:41:46,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2568 states, 1838 states have (on average 1.5522306855277475) internal successors, (2853), 1937 states have internal predecessors, (2853), 562 states have call successors, (562), 132 states have call predecessors, (562), 167 states have return successors, (657), 533 states have call predecessors, (657), 557 states have call successors, (657) [2022-12-14 10:41:46,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 4072 transitions. [2022-12-14 10:41:46,366 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 4072 transitions. Word has length 82 [2022-12-14 10:41:46,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:41:46,367 INFO L495 AbstractCegarLoop]: Abstraction has 2568 states and 4072 transitions. [2022-12-14 10:41:46,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 10:41:46,367 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 4072 transitions. [2022-12-14 10:41:46,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 10:41:46,370 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:41:46,370 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:41:46,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 10:41:46,370 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:41:46,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:41:46,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1618416220, now seen corresponding path program 1 times [2022-12-14 10:41:46,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:41:46,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281849829] [2022-12-14 10:41:46,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:46,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:41:46,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:46,541 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 10:41:46,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:41:46,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281849829] [2022-12-14 10:41:46,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281849829] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:41:46,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:41:46,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 10:41:46,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359825738] [2022-12-14 10:41:46,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:41:46,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 10:41:46,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:41:46,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 10:41:46,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:41:46,542 INFO L87 Difference]: Start difference. First operand 2568 states and 4072 transitions. Second operand has 7 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 10:41:47,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:41:47,005 INFO L93 Difference]: Finished difference Result 2759 states and 4348 transitions. [2022-12-14 10:41:47,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 10:41:47,006 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 87 [2022-12-14 10:41:47,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:41:47,015 INFO L225 Difference]: With dead ends: 2759 [2022-12-14 10:41:47,015 INFO L226 Difference]: Without dead ends: 2744 [2022-12-14 10:41:47,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-12-14 10:41:47,016 INFO L413 NwaCegarLoop]: 527 mSDtfsCounter, 580 mSDsluCounter, 2018 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 2545 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:41:47,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [582 Valid, 2545 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:41:47,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2744 states. [2022-12-14 10:41:47,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2744 to 2682. [2022-12-14 10:41:47,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2682 states, 1916 states have (on average 1.5438413361169103) internal successors, (2958), 2015 states have internal predecessors, (2958), 586 states have call successors, (586), 144 states have call predecessors, (586), 179 states have return successors, (695), 557 states have call predecessors, (695), 581 states have call successors, (695) [2022-12-14 10:41:47,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2682 states to 2682 states and 4239 transitions. [2022-12-14 10:41:47,173 INFO L78 Accepts]: Start accepts. Automaton has 2682 states and 4239 transitions. Word has length 87 [2022-12-14 10:41:47,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:41:47,173 INFO L495 AbstractCegarLoop]: Abstraction has 2682 states and 4239 transitions. [2022-12-14 10:41:47,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 10:41:47,174 INFO L276 IsEmpty]: Start isEmpty. Operand 2682 states and 4239 transitions. [2022-12-14 10:41:47,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 10:41:47,177 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:41:47,177 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, 1, 1, 1, 1, 1, 1] [2022-12-14 10:41:47,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 10:41:47,177 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:41:47,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:41:47,178 INFO L85 PathProgramCache]: Analyzing trace with hash -934660641, now seen corresponding path program 1 times [2022-12-14 10:41:47,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:41:47,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643741272] [2022-12-14 10:41:47,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:47,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:41:47,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:47,323 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 10:41:47,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:41:47,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643741272] [2022-12-14 10:41:47,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643741272] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:41:47,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:41:47,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:41:47,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202484881] [2022-12-14 10:41:47,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:41:47,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:41:47,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:41:47,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:41:47,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:41:47,325 INFO L87 Difference]: Start difference. First operand 2682 states and 4239 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 10:41:48,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:41:48,247 INFO L93 Difference]: Finished difference Result 7289 states and 11745 transitions. [2022-12-14 10:41:48,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:41:48,248 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 94 [2022-12-14 10:41:48,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:41:48,269 INFO L225 Difference]: With dead ends: 7289 [2022-12-14 10:41:48,269 INFO L226 Difference]: Without dead ends: 4623 [2022-12-14 10:41:48,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:41:48,276 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 1082 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1146 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 1220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 10:41:48,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1146 Valid, 698 Invalid, 1220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 10:41:48,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4623 states. [2022-12-14 10:41:48,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4623 to 4232. [2022-12-14 10:41:48,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4232 states, 3028 states have (on average 1.5392998678996037) internal successors, (4661), 3191 states have internal predecessors, (4661), 913 states have call successors, (913), 221 states have call predecessors, (913), 290 states have return successors, (1164), 867 states have call predecessors, (1164), 908 states have call successors, (1164) [2022-12-14 10:41:48,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4232 states to 4232 states and 6738 transitions. [2022-12-14 10:41:48,521 INFO L78 Accepts]: Start accepts. Automaton has 4232 states and 6738 transitions. Word has length 94 [2022-12-14 10:41:48,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:41:48,521 INFO L495 AbstractCegarLoop]: Abstraction has 4232 states and 6738 transitions. [2022-12-14 10:41:48,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 10:41:48,522 INFO L276 IsEmpty]: Start isEmpty. Operand 4232 states and 6738 transitions. [2022-12-14 10:41:48,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 10:41:48,525 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:41:48,526 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, 1, 1, 1, 1, 1, 1] [2022-12-14 10:41:48,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 10:41:48,526 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:41:48,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:41:48,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1823207633, now seen corresponding path program 1 times [2022-12-14 10:41:48,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:41:48,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851635066] [2022-12-14 10:41:48,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:48,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:41:48,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:48,807 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 10:41:48,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:41:48,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851635066] [2022-12-14 10:41:48,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851635066] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:41:48,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:41:48,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-14 10:41:48,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215817726] [2022-12-14 10:41:48,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:41:48,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 10:41:48,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:41:48,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 10:41:48,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-14 10:41:48,809 INFO L87 Difference]: Start difference. First operand 4232 states and 6738 transitions. Second operand has 9 states, 7 states have (on average 8.142857142857142) internal successors, (57), 8 states have internal predecessors, (57), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-12-14 10:41:50,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:41:50,579 INFO L93 Difference]: Finished difference Result 11208 states and 17906 transitions. [2022-12-14 10:41:50,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 10:41:50,580 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 8.142857142857142) internal successors, (57), 8 states have internal predecessors, (57), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 94 [2022-12-14 10:41:50,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:41:50,603 INFO L225 Difference]: With dead ends: 11208 [2022-12-14 10:41:50,603 INFO L226 Difference]: Without dead ends: 6992 [2022-12-14 10:41:50,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-12-14 10:41:50,617 INFO L413 NwaCegarLoop]: 538 mSDtfsCounter, 988 mSDsluCounter, 2027 mSDsCounter, 0 mSdLazyCounter, 4004 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1055 SdHoareTripleChecker+Valid, 2565 SdHoareTripleChecker+Invalid, 4349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 4004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:41:50,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1055 Valid, 2565 Invalid, 4349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 4004 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 10:41:50,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6992 states. [2022-12-14 10:41:51,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6992 to 6845. [2022-12-14 10:41:51,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6845 states, 4882 states have (on average 1.529291274068005) internal successors, (7466), 5136 states have internal predecessors, (7466), 1494 states have call successors, (1494), 338 states have call predecessors, (1494), 468 states have return successors, (1899), 1445 states have call predecessors, (1899), 1489 states have call successors, (1899) [2022-12-14 10:41:51,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6845 states to 6845 states and 10859 transitions. [2022-12-14 10:41:51,060 INFO L78 Accepts]: Start accepts. Automaton has 6845 states and 10859 transitions. Word has length 94 [2022-12-14 10:41:51,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:41:51,060 INFO L495 AbstractCegarLoop]: Abstraction has 6845 states and 10859 transitions. [2022-12-14 10:41:51,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 8.142857142857142) internal successors, (57), 8 states have internal predecessors, (57), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-12-14 10:41:51,061 INFO L276 IsEmpty]: Start isEmpty. Operand 6845 states and 10859 transitions. [2022-12-14 10:41:51,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-12-14 10:41:51,062 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:41:51,063 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, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:41:51,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 10:41:51,063 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:41:51,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:41:51,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1090162027, now seen corresponding path program 1 times [2022-12-14 10:41:51,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:41:51,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100316180] [2022-12-14 10:41:51,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:51,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:41:51,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:51,198 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 10:41:51,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:41:51,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100316180] [2022-12-14 10:41:51,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100316180] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:41:51,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:41:51,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:41:51,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504258551] [2022-12-14 10:41:51,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:41:51,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:41:51,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:41:51,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:41:51,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:41:51,200 INFO L87 Difference]: Start difference. First operand 6845 states and 10859 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 10:41:52,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:41:52,871 INFO L93 Difference]: Finished difference Result 19151 states and 31340 transitions. [2022-12-14 10:41:52,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:41:52,872 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 95 [2022-12-14 10:41:52,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:41:52,909 INFO L225 Difference]: With dead ends: 19151 [2022-12-14 10:41:52,909 INFO L226 Difference]: Without dead ends: 12325 [2022-12-14 10:41:52,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:41:52,929 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 1069 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1132 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 10:41:52,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1132 Valid, 710 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 877 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 10:41:52,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12325 states. [2022-12-14 10:41:53,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12325 to 11563. [2022-12-14 10:41:53,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11563 states, 8258 states have (on average 1.5254298861709856) internal successors, (12597), 8739 states have internal predecessors, (12597), 2477 states have call successors, (2477), 570 states have call predecessors, (2477), 827 states have return successors, (3524), 2378 states have call predecessors, (3524), 2472 states have call successors, (3524) [2022-12-14 10:41:53,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11563 states to 11563 states and 18598 transitions. [2022-12-14 10:41:53,703 INFO L78 Accepts]: Start accepts. Automaton has 11563 states and 18598 transitions. Word has length 95 [2022-12-14 10:41:53,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:41:53,703 INFO L495 AbstractCegarLoop]: Abstraction has 11563 states and 18598 transitions. [2022-12-14 10:41:53,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 10:41:53,704 INFO L276 IsEmpty]: Start isEmpty. Operand 11563 states and 18598 transitions. [2022-12-14 10:41:53,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-14 10:41:53,706 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:41:53,706 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:41:53,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 10:41:53,707 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:41:53,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:41:53,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1557837443, now seen corresponding path program 1 times [2022-12-14 10:41:53,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:41:53,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863228251] [2022-12-14 10:41:53,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:53,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:41:53,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:53,867 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 10:41:53,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:41:53,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863228251] [2022-12-14 10:41:53,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863228251] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:41:53,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:41:53,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:41:53,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483818315] [2022-12-14 10:41:53,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:41:53,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:41:53,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:41:53,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:41:53,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:41:53,869 INFO L87 Difference]: Start difference. First operand 11563 states and 18598 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 10:41:56,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:41:56,163 INFO L93 Difference]: Finished difference Result 33593 states and 56858 transitions. [2022-12-14 10:41:56,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:41:56,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 93 [2022-12-14 10:41:56,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:41:56,234 INFO L225 Difference]: With dead ends: 33593 [2022-12-14 10:41:56,234 INFO L226 Difference]: Without dead ends: 22055 [2022-12-14 10:41:56,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:41:56,266 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 1062 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1126 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 10:41:56,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1126 Valid, 722 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 10:41:56,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22055 states. [2022-12-14 10:41:57,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22055 to 20906. [2022-12-14 10:41:57,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20906 states, 14925 states have (on average 1.5195309882747068) internal successors, (22679), 15890 states have internal predecessors, (22679), 4405 states have call successors, (4405), 1034 states have call predecessors, (4405), 1575 states have return successors, (7444), 4206 states have call predecessors, (7444), 4400 states have call successors, (7444) [2022-12-14 10:41:57,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20906 states to 20906 states and 34528 transitions. [2022-12-14 10:41:57,621 INFO L78 Accepts]: Start accepts. Automaton has 20906 states and 34528 transitions. Word has length 93 [2022-12-14 10:41:57,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:41:57,622 INFO L495 AbstractCegarLoop]: Abstraction has 20906 states and 34528 transitions. [2022-12-14 10:41:57,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 10:41:57,622 INFO L276 IsEmpty]: Start isEmpty. Operand 20906 states and 34528 transitions. [2022-12-14 10:41:57,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 10:41:57,624 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:41:57,624 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:41:57,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 10:41:57,624 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:41:57,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:41:57,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1048441839, now seen corresponding path program 1 times [2022-12-14 10:41:57,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:41:57,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689994237] [2022-12-14 10:41:57,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:41:57,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:41:57,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:41:57,816 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 10:41:57,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:41:57,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689994237] [2022-12-14 10:41:57,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689994237] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:41:57,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:41:57,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:41:57,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744715399] [2022-12-14 10:41:57,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:41:57,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:41:57,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:41:57,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:41:57,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:41:57,818 INFO L87 Difference]: Start difference. First operand 20906 states and 34528 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 10:42:01,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:42:01,424 INFO L93 Difference]: Finished difference Result 62210 states and 111629 transitions. [2022-12-14 10:42:01,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:42:01,425 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 94 [2022-12-14 10:42:01,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:42:01,632 INFO L225 Difference]: With dead ends: 62210 [2022-12-14 10:42:01,632 INFO L226 Difference]: Without dead ends: 41341 [2022-12-14 10:42:01,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:42:01,727 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 1049 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1112 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 10:42:01,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1112 Valid, 731 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 10:42:01,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41341 states. [2022-12-14 10:42:04,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41341 to 39369. [2022-12-14 10:42:04,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39369 states, 28064 states have (on average 1.5120082668187) internal successors, (42433), 30057 states have internal predecessors, (42433), 8173 states have call successors, (8173), 1962 states have call predecessors, (8173), 3131 states have return successors, (17560), 7774 states have call predecessors, (17560), 8168 states have call successors, (17560) [2022-12-14 10:42:04,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39369 states to 39369 states and 68166 transitions. [2022-12-14 10:42:04,585 INFO L78 Accepts]: Start accepts. Automaton has 39369 states and 68166 transitions. Word has length 94 [2022-12-14 10:42:04,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:42:04,585 INFO L495 AbstractCegarLoop]: Abstraction has 39369 states and 68166 transitions. [2022-12-14 10:42:04,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 10:42:04,586 INFO L276 IsEmpty]: Start isEmpty. Operand 39369 states and 68166 transitions. [2022-12-14 10:42:04,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-12-14 10:42:04,587 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:42:04,587 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:42:04,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 10:42:04,587 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:42:04,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:42:04,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1857923903, now seen corresponding path program 1 times [2022-12-14 10:42:04,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:42:04,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188518225] [2022-12-14 10:42:04,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:42:04,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:42:04,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:42:04,715 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 10:42:04,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:42:04,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188518225] [2022-12-14 10:42:04,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188518225] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:42:04,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:42:04,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:42:04,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783772547] [2022-12-14 10:42:04,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:42:04,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:42:04,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:42:04,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:42:04,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:42:04,717 INFO L87 Difference]: Start difference. First operand 39369 states and 68166 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 10:42:11,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:42:11,270 INFO L93 Difference]: Finished difference Result 119110 states and 235238 transitions. [2022-12-14 10:42:11,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:42:11,271 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 95 [2022-12-14 10:42:11,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:42:11,751 INFO L225 Difference]: With dead ends: 119110 [2022-12-14 10:42:11,751 INFO L226 Difference]: Without dead ends: 79792 [2022-12-14 10:42:11,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:42:11,913 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 1059 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1121 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 10:42:11,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1121 Valid, 722 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 10:42:11,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79792 states. [2022-12-14 10:42:18,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79792 to 75592. [2022-12-14 10:42:18,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75592 states, 53969 states have (on average 1.5083103262984305) internal successors, (81402), 57898 states have internal predecessors, (81402), 15510 states have call successors, (15510), 3805 states have call predecessors, (15510), 6112 states have return successors, (42380), 14713 states have call predecessors, (42380), 15505 states have call successors, (42380) [2022-12-14 10:42:18,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75592 states to 75592 states and 139292 transitions. [2022-12-14 10:42:18,601 INFO L78 Accepts]: Start accepts. Automaton has 75592 states and 139292 transitions. Word has length 95 [2022-12-14 10:42:18,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:42:18,602 INFO L495 AbstractCegarLoop]: Abstraction has 75592 states and 139292 transitions. [2022-12-14 10:42:18,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 10:42:18,602 INFO L276 IsEmpty]: Start isEmpty. Operand 75592 states and 139292 transitions. [2022-12-14 10:42:18,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-12-14 10:42:18,608 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:42:18,608 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:42:18,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 10:42:18,609 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:42:18,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:42:18,609 INFO L85 PathProgramCache]: Analyzing trace with hash -956622261, now seen corresponding path program 1 times [2022-12-14 10:42:18,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:42:18,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098919344] [2022-12-14 10:42:18,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:42:18,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:42:18,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:42:18,770 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 10:42:18,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:42:18,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098919344] [2022-12-14 10:42:18,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098919344] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:42:18,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144999536] [2022-12-14 10:42:18,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:42:18,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:42:18,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:42:18,772 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:42:18,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 10:42:19,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:42:19,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 2063 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:42:19,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:42:19,110 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 10:42:19,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:42:19,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144999536] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:42:19,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:42:19,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-12-14 10:42:19,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929107194] [2022-12-14 10:42:19,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:42:19,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:42:19,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:42:19,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:42:19,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:42:19,112 INFO L87 Difference]: Start difference. First operand 75592 states and 139292 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 10:42:24,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:42:24,980 INFO L93 Difference]: Finished difference Result 155028 states and 302040 transitions. [2022-12-14 10:42:24,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:42:24,981 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 141 [2022-12-14 10:42:24,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:42:25,303 INFO L225 Difference]: With dead ends: 155028 [2022-12-14 10:42:25,303 INFO L226 Difference]: Without dead ends: 79453 [2022-12-14 10:42:25,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:42:25,548 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 213 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:42:25,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1329 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:42:25,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79453 states. [2022-12-14 10:42:31,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79453 to 79453. [2022-12-14 10:42:31,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79453 states, 57731 states have (on average 1.5352063882489477) internal successors, (88629), 61660 states have internal predecessors, (88629), 15510 states have call successors, (15510), 3904 states have call predecessors, (15510), 6211 states have return successors, (42380), 14713 states have call predecessors, (42380), 15505 states have call successors, (42380) [2022-12-14 10:42:31,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79453 states to 79453 states and 146519 transitions. [2022-12-14 10:42:31,641 INFO L78 Accepts]: Start accepts. Automaton has 79453 states and 146519 transitions. Word has length 141 [2022-12-14 10:42:31,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:42:31,641 INFO L495 AbstractCegarLoop]: Abstraction has 79453 states and 146519 transitions. [2022-12-14 10:42:31,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 10:42:31,641 INFO L276 IsEmpty]: Start isEmpty. Operand 79453 states and 146519 transitions. [2022-12-14 10:42:31,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 10:42:31,648 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:42:31,648 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:42:31,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 10:42:31,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 10:42:31,850 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:42:31,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:42:31,851 INFO L85 PathProgramCache]: Analyzing trace with hash -606005362, now seen corresponding path program 1 times [2022-12-14 10:42:31,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:42:31,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110583700] [2022-12-14 10:42:31,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:42:31,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:42:31,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:42:31,976 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-12-14 10:42:31,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:42:31,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110583700] [2022-12-14 10:42:31,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110583700] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:42:31,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660490997] [2022-12-14 10:42:31,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:42:31,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:42:31,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:42:31,977 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:42:31,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 10:42:32,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:42:32,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 2068 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:42:32,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:42:32,233 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 10:42:32,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:42:32,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660490997] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:42:32,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:42:32,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 10:42:32,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65347342] [2022-12-14 10:42:32,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:42:32,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:42:32,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:42:32,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:42:32,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:42:32,235 INFO L87 Difference]: Start difference. First operand 79453 states and 146519 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, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 10:42:37,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:42:37,567 INFO L93 Difference]: Finished difference Result 162750 states and 316164 transitions. [2022-12-14 10:42:37,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:42:37,568 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, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 146 [2022-12-14 10:42:37,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:42:37,884 INFO L225 Difference]: With dead ends: 162750 [2022-12-14 10:42:37,884 INFO L226 Difference]: Without dead ends: 83314 [2022-12-14 10:42:38,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 146 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 10:42:38,139 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 211 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:42:38,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1329 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:42:38,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83314 states. [2022-12-14 10:42:43,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83314 to 83314. [2022-12-14 10:42:43,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83314 states, 61493 states have (on average 1.5588115720488511) internal successors, (95856), 65422 states have internal predecessors, (95856), 15510 states have call successors, (15510), 4003 states have call predecessors, (15510), 6310 states have return successors, (42380), 14713 states have call predecessors, (42380), 15505 states have call successors, (42380) [2022-12-14 10:42:43,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83314 states to 83314 states and 153746 transitions. [2022-12-14 10:42:43,995 INFO L78 Accepts]: Start accepts. Automaton has 83314 states and 153746 transitions. Word has length 146 [2022-12-14 10:42:43,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:42:43,995 INFO L495 AbstractCegarLoop]: Abstraction has 83314 states and 153746 transitions. [2022-12-14 10:42:43,995 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, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 10:42:43,996 INFO L276 IsEmpty]: Start isEmpty. Operand 83314 states and 153746 transitions. [2022-12-14 10:42:44,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-12-14 10:42:44,002 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:42:44,002 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:42:44,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 10:42:44,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 10:42:44,204 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:42:44,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:42:44,205 INFO L85 PathProgramCache]: Analyzing trace with hash -684309890, now seen corresponding path program 1 times [2022-12-14 10:42:44,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:42:44,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69666238] [2022-12-14 10:42:44,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:42:44,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:42:44,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:42:44,323 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-12-14 10:42:44,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:42:44,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69666238] [2022-12-14 10:42:44,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69666238] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:42:44,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159012859] [2022-12-14 10:42:44,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:42:44,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:42:44,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:42:44,324 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:42:44,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 10:42:44,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:42:44,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 2072 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:42:44,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:42:44,558 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 10:42:44,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:42:44,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159012859] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:42:44,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:42:44,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 10:42:44,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347194312] [2022-12-14 10:42:44,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:42:44,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:42:44,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:42:44,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:42:44,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:42:44,560 INFO L87 Difference]: Start difference. First operand 83314 states and 153746 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 10:42:50,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:42:50,226 INFO L93 Difference]: Finished difference Result 170472 states and 330288 transitions. [2022-12-14 10:42:50,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:42:50,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 150 [2022-12-14 10:42:50,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:42:50,670 INFO L225 Difference]: With dead ends: 170472 [2022-12-14 10:42:50,670 INFO L226 Difference]: Without dead ends: 87175 [2022-12-14 10:42:50,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 150 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 10:42:50,918 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 209 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:42:50,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1329 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:42:50,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87175 states. [2022-12-14 10:42:56,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87175 to 87175. [2022-12-14 10:42:56,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87175 states, 65255 states have (on average 1.579695042525477) internal successors, (103083), 69184 states have internal predecessors, (103083), 15510 states have call successors, (15510), 4102 states have call predecessors, (15510), 6409 states have return successors, (42380), 14713 states have call predecessors, (42380), 15505 states have call successors, (42380) [2022-12-14 10:42:56,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87175 states to 87175 states and 160973 transitions. [2022-12-14 10:42:56,743 INFO L78 Accepts]: Start accepts. Automaton has 87175 states and 160973 transitions. Word has length 150 [2022-12-14 10:42:56,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:42:56,743 INFO L495 AbstractCegarLoop]: Abstraction has 87175 states and 160973 transitions. [2022-12-14 10:42:56,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 10:42:56,743 INFO L276 IsEmpty]: Start isEmpty. Operand 87175 states and 160973 transitions. [2022-12-14 10:42:56,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-12-14 10:42:56,750 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:42:56,750 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:42:56,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 10:42:56,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 10:42:56,951 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:42:56,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:42:56,952 INFO L85 PathProgramCache]: Analyzing trace with hash -619561423, now seen corresponding path program 1 times [2022-12-14 10:42:56,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:42:56,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961490443] [2022-12-14 10:42:56,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:42:56,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:42:57,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:42:57,204 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-14 10:42:57,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:42:57,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961490443] [2022-12-14 10:42:57,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961490443] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:42:57,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526506661] [2022-12-14 10:42:57,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:42:57,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:42:57,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:42:57,205 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:42:57,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 10:42:57,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:42:57,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 2075 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:42:57,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:42:57,543 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 10:42:57,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:42:57,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526506661] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:42:57,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:42:57,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 10:42:57,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803360749] [2022-12-14 10:42:57,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:42:57,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:42:57,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:42:57,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:42:57,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:42:57,545 INFO L87 Difference]: Start difference. First operand 87175 states and 160973 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, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 10:43:03,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:43:03,015 INFO L93 Difference]: Finished difference Result 178194 states and 344412 transitions. [2022-12-14 10:43:03,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:43:03,016 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, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 153 [2022-12-14 10:43:03,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:43:03,553 INFO L225 Difference]: With dead ends: 178194 [2022-12-14 10:43:03,554 INFO L226 Difference]: Without dead ends: 91036 [2022-12-14 10:43:03,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 153 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 10:43:03,793 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 207 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:43:03,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1329 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:43:03,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91036 states. [2022-12-14 10:43:09,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91036 to 91036. [2022-12-14 10:43:09,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91036 states, 69017 states have (on average 1.598301867655795) internal successors, (110310), 72946 states have internal predecessors, (110310), 15510 states have call successors, (15510), 4201 states have call predecessors, (15510), 6508 states have return successors, (42380), 14713 states have call predecessors, (42380), 15505 states have call successors, (42380) [2022-12-14 10:43:09,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91036 states to 91036 states and 168200 transitions. [2022-12-14 10:43:09,646 INFO L78 Accepts]: Start accepts. Automaton has 91036 states and 168200 transitions. Word has length 153 [2022-12-14 10:43:09,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:43:09,647 INFO L495 AbstractCegarLoop]: Abstraction has 91036 states and 168200 transitions. [2022-12-14 10:43:09,647 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, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 10:43:09,647 INFO L276 IsEmpty]: Start isEmpty. Operand 91036 states and 168200 transitions. [2022-12-14 10:43:09,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-12-14 10:43:09,657 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:43:09,658 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 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] [2022-12-14 10:43:09,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 10:43:09,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:43:09,858 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:43:09,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:43:09,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1072670881, now seen corresponding path program 1 times [2022-12-14 10:43:09,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:43:09,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335900416] [2022-12-14 10:43:09,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:43:09,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:43:09,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:43:10,005 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-14 10:43:10,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:43:10,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335900416] [2022-12-14 10:43:10,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335900416] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:43:10,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:43:10,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:43:10,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198177759] [2022-12-14 10:43:10,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:43:10,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:43:10,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:43:10,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:43:10,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:43:10,007 INFO L87 Difference]: Start difference. First operand 91036 states and 168200 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 10:43:15,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:43:15,489 INFO L93 Difference]: Finished difference Result 186213 states and 359587 transitions. [2022-12-14 10:43:15,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:43:15,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 155 [2022-12-14 10:43:15,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:43:15,837 INFO L225 Difference]: With dead ends: 186213 [2022-12-14 10:43:15,837 INFO L226 Difference]: Without dead ends: 94402 [2022-12-14 10:43:16,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 10:43:16,103 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 99 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:43:16,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 1342 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:43:16,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94402 states. [2022-12-14 10:43:21,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94402 to 94402. [2022-12-14 10:43:21,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94402 states, 72284 states have (on average 1.550716617785402) internal successors, (112092), 76213 states have internal predecessors, (112092), 15510 states have call successors, (15510), 4300 states have call predecessors, (15510), 6607 states have return successors, (42380), 14713 states have call predecessors, (42380), 15505 states have call successors, (42380) [2022-12-14 10:43:22,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94402 states to 94402 states and 169982 transitions. [2022-12-14 10:43:22,311 INFO L78 Accepts]: Start accepts. Automaton has 94402 states and 169982 transitions. Word has length 155 [2022-12-14 10:43:22,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:43:22,312 INFO L495 AbstractCegarLoop]: Abstraction has 94402 states and 169982 transitions. [2022-12-14 10:43:22,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 10:43:22,312 INFO L276 IsEmpty]: Start isEmpty. Operand 94402 states and 169982 transitions. [2022-12-14 10:43:22,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-12-14 10:43:22,319 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:43:22,319 INFO L195 NwaCegarLoop]: trace histogram [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 10:43:22,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 10:43:22,319 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:43:22,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:43:22,320 INFO L85 PathProgramCache]: Analyzing trace with hash -2077555312, now seen corresponding path program 1 times [2022-12-14 10:43:22,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:43:22,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352702603] [2022-12-14 10:43:22,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:43:22,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:43:22,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:43:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-14 10:43:22,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:43:22,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352702603] [2022-12-14 10:43:22,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352702603] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:43:22,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:43:22,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 10:43:22,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790760376] [2022-12-14 10:43:22,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:43:22,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 10:43:22,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:43:22,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 10:43:22,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:43:22,572 INFO L87 Difference]: Start difference. First operand 94402 states and 169982 transitions. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 6 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) [2022-12-14 10:43:31,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:43:31,172 INFO L93 Difference]: Finished difference Result 220743 states and 418529 transitions. [2022-12-14 10:43:31,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 10:43:31,173 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 6 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) Word has length 155 [2022-12-14 10:43:31,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:43:31,702 INFO L225 Difference]: With dead ends: 220743 [2022-12-14 10:43:31,703 INFO L226 Difference]: Without dead ends: 120220 [2022-12-14 10:43:32,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-12-14 10:43:32,013 INFO L413 NwaCegarLoop]: 402 mSDtfsCounter, 1541 mSDsluCounter, 1415 mSDsCounter, 0 mSdLazyCounter, 3366 mSolverCounterSat, 702 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1577 SdHoareTripleChecker+Valid, 1817 SdHoareTripleChecker+Invalid, 4068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 702 IncrementalHoareTripleChecker+Valid, 3366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:43:32,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1577 Valid, 1817 Invalid, 4068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [702 Valid, 3366 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 10:43:32,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120220 states. [2022-12-14 10:43:39,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120220 to 117413. [2022-12-14 10:43:39,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117413 states, 89229 states have (on average 1.5248742000918984) internal successors, (136063), 94690 states have internal predecessors, (136063), 19542 states have call successors, (19542), 5294 states have call predecessors, (19542), 8641 states have return successors, (50394), 18273 states have call predecessors, (50394), 19537 states have call successors, (50394) [2022-12-14 10:43:40,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117413 states to 117413 states and 205999 transitions. [2022-12-14 10:43:40,405 INFO L78 Accepts]: Start accepts. Automaton has 117413 states and 205999 transitions. Word has length 155 [2022-12-14 10:43:40,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:43:40,406 INFO L495 AbstractCegarLoop]: Abstraction has 117413 states and 205999 transitions. [2022-12-14 10:43:40,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 6 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) [2022-12-14 10:43:40,406 INFO L276 IsEmpty]: Start isEmpty. Operand 117413 states and 205999 transitions. [2022-12-14 10:43:40,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 10:43:40,414 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:43:40,414 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 10:43:40,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-14 10:43:40,415 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:43:40,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:43:40,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1354504494, now seen corresponding path program 1 times [2022-12-14 10:43:40,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:43:40,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724100802] [2022-12-14 10:43:40,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:43:40,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:43:40,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:43:40,894 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-12-14 10:43:40,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:43:40,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724100802] [2022-12-14 10:43:40,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724100802] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:43:40,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:43:40,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-14 10:43:40,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991679698] [2022-12-14 10:43:40,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:43:40,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 10:43:40,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:43:40,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 10:43:40,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-12-14 10:43:40,896 INFO L87 Difference]: Start difference. First operand 117413 states and 205999 transitions. Second operand has 11 states, 9 states have (on average 9.333333333333334) internal successors, (84), 10 states have internal predecessors, (84), 6 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 7 states have call predecessors, (23), 5 states have call successors, (23) [2022-12-14 10:43:52,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:43:52,203 INFO L93 Difference]: Finished difference Result 245695 states and 481432 transitions. [2022-12-14 10:43:52,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 10:43:52,204 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 9.333333333333334) internal successors, (84), 10 states have internal predecessors, (84), 6 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 7 states have call predecessors, (23), 5 states have call successors, (23) Word has length 156 [2022-12-14 10:43:52,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:43:53,033 INFO L225 Difference]: With dead ends: 245695 [2022-12-14 10:43:53,033 INFO L226 Difference]: Without dead ends: 122885 [2022-12-14 10:43:53,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2022-12-14 10:43:53,623 INFO L413 NwaCegarLoop]: 489 mSDtfsCounter, 1897 mSDsluCounter, 2106 mSDsCounter, 0 mSdLazyCounter, 5238 mSolverCounterSat, 1132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1949 SdHoareTripleChecker+Valid, 2595 SdHoareTripleChecker+Invalid, 6370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1132 IncrementalHoareTripleChecker+Valid, 5238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-12-14 10:43:53,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1949 Valid, 2595 Invalid, 6370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1132 Valid, 5238 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-12-14 10:43:53,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122885 states. [2022-12-14 10:44:01,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122885 to 113575. [2022-12-14 10:44:01,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113575 states, 86212 states have (on average 1.5224678699021017) internal successors, (131255), 91683 states have internal predecessors, (131255), 18992 states have call successors, (18992), 5211 states have call predecessors, (18992), 8370 states have return successors, (43019), 17535 states have call predecessors, (43019), 18987 states have call successors, (43019) [2022-12-14 10:44:02,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113575 states to 113575 states and 193266 transitions. [2022-12-14 10:44:02,242 INFO L78 Accepts]: Start accepts. Automaton has 113575 states and 193266 transitions. Word has length 156 [2022-12-14 10:44:02,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:44:02,242 INFO L495 AbstractCegarLoop]: Abstraction has 113575 states and 193266 transitions. [2022-12-14 10:44:02,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 9.333333333333334) internal successors, (84), 10 states have internal predecessors, (84), 6 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 7 states have call predecessors, (23), 5 states have call successors, (23) [2022-12-14 10:44:02,242 INFO L276 IsEmpty]: Start isEmpty. Operand 113575 states and 193266 transitions. [2022-12-14 10:44:02,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-12-14 10:44:02,249 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:44:02,250 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 10:44:02,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-14 10:44:02,250 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:44:02,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:44:02,250 INFO L85 PathProgramCache]: Analyzing trace with hash -516216142, now seen corresponding path program 1 times [2022-12-14 10:44:02,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:44:02,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136762396] [2022-12-14 10:44:02,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:44:02,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:44:02,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:44:02,545 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 10:44:02,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:44:02,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136762396] [2022-12-14 10:44:02,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136762396] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:44:02,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:44:02,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 10:44:02,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061231602] [2022-12-14 10:44:02,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:44:02,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:44:02,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:44:02,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:44:02,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:44:02,547 INFO L87 Difference]: Start difference. First operand 113575 states and 193266 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 5 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2022-12-14 10:44:11,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:44:11,734 INFO L93 Difference]: Finished difference Result 232577 states and 426451 transitions. [2022-12-14 10:44:11,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 10:44:11,735 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 5 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) Word has length 157 [2022-12-14 10:44:11,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:44:12,429 INFO L225 Difference]: With dead ends: 232577 [2022-12-14 10:44:12,429 INFO L226 Difference]: Without dead ends: 114468 [2022-12-14 10:44:12,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-12-14 10:44:12,726 INFO L413 NwaCegarLoop]: 494 mSDtfsCounter, 1457 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 1923 mSolverCounterSat, 759 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1530 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 2682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 759 IncrementalHoareTripleChecker+Valid, 1923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:44:12,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1530 Valid, 1182 Invalid, 2682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [759 Valid, 1923 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 10:44:12,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114468 states. [2022-12-14 10:44:20,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114468 to 113568. [2022-12-14 10:44:20,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113568 states, 86226 states have (on average 1.5215712198176885) internal successors, (131199), 91697 states have internal predecessors, (131199), 18973 states have call successors, (18973), 5209 states have call predecessors, (18973), 8368 states have return successors, (43000), 17511 states have call predecessors, (43000), 18968 states have call successors, (43000) [2022-12-14 10:44:20,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113568 states to 113568 states and 193172 transitions. [2022-12-14 10:44:20,653 INFO L78 Accepts]: Start accepts. Automaton has 113568 states and 193172 transitions. Word has length 157 [2022-12-14 10:44:20,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:44:20,654 INFO L495 AbstractCegarLoop]: Abstraction has 113568 states and 193172 transitions. [2022-12-14 10:44:20,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 5 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2022-12-14 10:44:20,654 INFO L276 IsEmpty]: Start isEmpty. Operand 113568 states and 193172 transitions. [2022-12-14 10:44:20,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-12-14 10:44:20,661 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:44:20,661 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:44:20,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-14 10:44:20,661 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:44:20,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:44:20,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1017709680, now seen corresponding path program 1 times [2022-12-14 10:44:20,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:44:20,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322073598] [2022-12-14 10:44:20,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:44:20,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:44:20,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:44:20,947 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-12-14 10:44:20,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:44:20,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322073598] [2022-12-14 10:44:20,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322073598] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:44:20,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:44:20,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 10:44:20,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3453500] [2022-12-14 10:44:20,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:44:20,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:44:20,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:44:20,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:44:20,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:44:20,948 INFO L87 Difference]: Start difference. First operand 113568 states and 193172 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 5 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2022-12-14 10:44:29,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:44:29,008 INFO L93 Difference]: Finished difference Result 220769 states and 377049 transitions. [2022-12-14 10:44:29,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 10:44:29,009 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 5 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) Word has length 162 [2022-12-14 10:44:29,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:44:29,449 INFO L225 Difference]: With dead ends: 220769 [2022-12-14 10:44:29,449 INFO L226 Difference]: Without dead ends: 107318 [2022-12-14 10:44:29,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-12-14 10:44:29,733 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 1112 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 1472 mSolverCounterSat, 519 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1164 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 1991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 519 IncrementalHoareTripleChecker+Valid, 1472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:44:29,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1164 Valid, 791 Invalid, 1991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [519 Valid, 1472 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 10:44:29,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107318 states. [2022-12-14 10:44:36,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107318 to 105155. [2022-12-14 10:44:36,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105155 states, 80559 states have (on average 1.5386735187874725) internal successors, (123954), 86013 states have internal predecessors, (123954), 16681 states have call successors, (16681), 4483 states have call predecessors, (16681), 7914 states have return successors, (38278), 15364 states have call predecessors, (38278), 16676 states have call successors, (38278) [2022-12-14 10:44:37,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105155 states to 105155 states and 178913 transitions. [2022-12-14 10:44:37,119 INFO L78 Accepts]: Start accepts. Automaton has 105155 states and 178913 transitions. Word has length 162 [2022-12-14 10:44:37,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:44:37,120 INFO L495 AbstractCegarLoop]: Abstraction has 105155 states and 178913 transitions. [2022-12-14 10:44:37,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 5 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2022-12-14 10:44:37,120 INFO L276 IsEmpty]: Start isEmpty. Operand 105155 states and 178913 transitions. [2022-12-14 10:44:37,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-12-14 10:44:37,126 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:44:37,126 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:44:37,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-14 10:44:37,126 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:44:37,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:44:37,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1203152978, now seen corresponding path program 1 times [2022-12-14 10:44:37,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:44:37,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750433034] [2022-12-14 10:44:37,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:44:37,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:44:37,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:44:37,585 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-12-14 10:44:37,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:44:37,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750433034] [2022-12-14 10:44:37,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750433034] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:44:37,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:44:37,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 10:44:37,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366219893] [2022-12-14 10:44:37,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:44:37,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 10:44:37,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:44:37,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 10:44:37,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:44:37,587 INFO L87 Difference]: Start difference. First operand 105155 states and 178913 transitions. Second operand has 8 states, 5 states have (on average 17.4) internal successors, (87), 7 states have internal predecessors, (87), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2022-12-14 10:44:47,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:44:47,592 INFO L93 Difference]: Finished difference Result 257525 states and 447494 transitions. [2022-12-14 10:44:47,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 10:44:47,593 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 17.4) internal successors, (87), 7 states have internal predecessors, (87), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 164 [2022-12-14 10:44:47,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:44:48,318 INFO L225 Difference]: With dead ends: 257525 [2022-12-14 10:44:48,318 INFO L226 Difference]: Without dead ends: 155841 [2022-12-14 10:44:48,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-12-14 10:44:48,675 INFO L413 NwaCegarLoop]: 979 mSDtfsCounter, 536 mSDsluCounter, 4842 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 5821 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:44:48,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [551 Valid, 5821 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:44:48,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155841 states. [2022-12-14 10:44:58,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155841 to 155663. [2022-12-14 10:44:58,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155663 states, 119052 states have (on average 1.5377986090111884) internal successors, (183078), 126961 states have internal predecessors, (183078), 25063 states have call successors, (25063), 6673 states have call predecessors, (25063), 11547 states have return successors, (57369), 23122 states have call predecessors, (57369), 25058 states have call successors, (57369) [2022-12-14 10:44:59,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155663 states to 155663 states and 265510 transitions. [2022-12-14 10:44:59,649 INFO L78 Accepts]: Start accepts. Automaton has 155663 states and 265510 transitions. Word has length 164 [2022-12-14 10:44:59,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:44:59,650 INFO L495 AbstractCegarLoop]: Abstraction has 155663 states and 265510 transitions. [2022-12-14 10:44:59,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 17.4) internal successors, (87), 7 states have internal predecessors, (87), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2022-12-14 10:44:59,650 INFO L276 IsEmpty]: Start isEmpty. Operand 155663 states and 265510 transitions. [2022-12-14 10:44:59,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-12-14 10:44:59,656 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:44:59,657 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:44:59,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-14 10:44:59,657 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:44:59,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:44:59,657 INFO L85 PathProgramCache]: Analyzing trace with hash -234178819, now seen corresponding path program 1 times [2022-12-14 10:44:59,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:44:59,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833074826] [2022-12-14 10:44:59,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:44:59,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:44:59,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:45:00,572 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-14 10:45:00,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:45:00,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833074826] [2022-12-14 10:45:00,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833074826] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:45:00,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945382201] [2022-12-14 10:45:00,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:45:00,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:45:00,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:45:00,574 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:45:00,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 10:45:00,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:45:00,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 2100 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 10:45:00,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:45:00,863 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-12-14 10:45:00,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:45:00,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945382201] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:45:00,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:45:00,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [21] total 23 [2022-12-14 10:45:00,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954076102] [2022-12-14 10:45:00,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:45:00,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:45:00,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:45:00,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:45:00,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-12-14 10:45:00,865 INFO L87 Difference]: Start difference. First operand 155663 states and 265510 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 1 states have call successors, (24) [2022-12-14 10:45:10,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:45:10,538 INFO L93 Difference]: Finished difference Result 158797 states and 296040 transitions. [2022-12-14 10:45:10,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:45:10,539 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 1 states have call successors, (24) Word has length 164 [2022-12-14 10:45:10,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:45:11,207 INFO L225 Difference]: With dead ends: 158797 [2022-12-14 10:45:11,208 INFO L226 Difference]: Without dead ends: 158640 [2022-12-14 10:45:11,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-12-14 10:45:11,278 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 47 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1607 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:45:11,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 1607 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:45:11,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158640 states. [2022-12-14 10:45:21,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158640 to 156049. [2022-12-14 10:45:22,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156049 states, 119438 states have (on average 1.536060550243641) internal successors, (183464), 127347 states have internal predecessors, (183464), 25063 states have call successors, (25063), 6673 states have call predecessors, (25063), 11547 states have return successors, (57369), 23122 states have call predecessors, (57369), 25058 states have call successors, (57369) [2022-12-14 10:45:22,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156049 states to 156049 states and 265896 transitions. [2022-12-14 10:45:22,898 INFO L78 Accepts]: Start accepts. Automaton has 156049 states and 265896 transitions. Word has length 164 [2022-12-14 10:45:22,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:45:22,899 INFO L495 AbstractCegarLoop]: Abstraction has 156049 states and 265896 transitions. [2022-12-14 10:45:22,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 1 states have call successors, (24) [2022-12-14 10:45:22,899 INFO L276 IsEmpty]: Start isEmpty. Operand 156049 states and 265896 transitions. [2022-12-14 10:45:22,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-12-14 10:45:22,907 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:45:22,908 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:45:22,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 10:45:23,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 10:45:23,108 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:45:23,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:45:23,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1588309475, now seen corresponding path program 1 times [2022-12-14 10:45:23,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:45:23,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228587264] [2022-12-14 10:45:23,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:45:23,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:45:23,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:45:24,227 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-12-14 10:45:24,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:45:24,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228587264] [2022-12-14 10:45:24,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228587264] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:45:24,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874301508] [2022-12-14 10:45:24,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:45:24,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:45:24,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:45:24,229 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:45:24,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e45cf3-d067-470b-b0a4-e360b87a1eb4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 10:45:24,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:45:24,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 2147 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-14 10:45:24,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:45:25,214 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-12-14 10:45:25,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:45:27,123 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 10:45:33,408 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 10:45:33,721 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 10:45:40,184 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 10:45:40,461 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 10:45:46,855 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 10:45:47,131 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 10:45:53,631 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 10:45:53,717 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 49188 disjunctions. This might take some time... [2022-12-14 10:48:20,521 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 49188 disjunctions.