./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product32.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_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/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_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/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_cdd49769-8e3a-421b-8d3f-75d7a86455a4/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 6f20249a191004f50add5285446ee5ffba043f1ff9b40e0e115c641082e595e2 --- 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 11:12:34,606 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:12:34,607 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:12:34,619 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:12:34,620 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:12:34,620 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:12:34,621 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:12:34,622 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:12:34,623 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:12:34,624 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:12:34,624 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:12:34,625 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:12:34,625 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:12:34,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:12:34,626 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:12:34,627 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:12:34,628 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:12:34,628 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:12:34,629 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:12:34,630 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:12:34,631 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:12:34,632 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:12:34,633 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:12:34,633 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:12:34,635 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:12:34,636 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:12:34,636 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:12:34,636 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:12:34,637 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:12:34,637 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:12:34,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:12:34,638 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:12:34,638 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:12:34,639 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:12:34,640 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:12:34,640 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:12:34,640 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:12:34,640 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:12:34,640 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:12:34,641 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:12:34,641 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:12:34,642 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 11:12:34,664 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:12:34,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:12:34,665 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:12:34,665 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:12:34,666 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:12:34,666 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:12:34,666 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:12:34,666 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:12:34,666 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:12:34,667 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 11:12:34,667 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:12:34,667 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:12:34,667 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 11:12:34,667 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 11:12:34,667 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:12:34,668 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 11:12:34,668 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 11:12:34,668 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 11:12:34,669 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:12:34,669 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:12:34,669 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:12:34,669 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:12:34,669 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:12:34,669 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 11:12:34,670 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:12:34,670 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 11:12:34,670 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:12:34,670 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 11:12:34,670 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:12:34,670 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 11:12:34,670 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:12:34,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:12:34,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:12:34,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:12:34,671 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 11:12:34,671 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:12:34,672 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 11:12:34,672 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 11:12:34,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 11:12:34,672 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 11:12:34,672 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:12:34,672 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_cdd49769-8e3a-421b-8d3f-75d7a86455a4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6f20249a191004f50add5285446ee5ffba043f1ff9b40e0e115c641082e595e2 [2022-12-14 11:12:34,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:12:34,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:12:34,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:12:34,862 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:12:34,862 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:12:34,863 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c [2022-12-14 11:12:37,359 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:12:37,577 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:12:37,577 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c [2022-12-14 11:12:37,588 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/data/d545c9df0/9a98ee3201034e50bbf17958c5e4ecef/FLAG29e392ffa [2022-12-14 11:12:37,931 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/data/d545c9df0/9a98ee3201034e50bbf17958c5e4ecef [2022-12-14 11:12:37,934 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:12:37,935 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:12:37,936 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:12:37,936 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:12:37,940 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:12:37,941 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:12:37" (1/1) ... [2022-12-14 11:12:37,942 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26051f16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:12:37, skipping insertion in model container [2022-12-14 11:12:37,942 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:12:37" (1/1) ... [2022-12-14 11:12:37,949 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:12:37,990 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:12:38,141 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_cdd49769-8e3a-421b-8d3f-75d7a86455a4/sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c[17414,17427] [2022-12-14 11:12:38,306 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:12:38,315 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:12:38,335 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_cdd49769-8e3a-421b-8d3f-75d7a86455a4/sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c[17414,17427] [2022-12-14 11:12:38,387 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:12:38,405 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:12:38,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:12:38 WrapperNode [2022-12-14 11:12:38,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:12:38,406 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:12:38,406 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:12:38,406 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:12:38,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:12:38" (1/1) ... [2022-12-14 11:12:38,427 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:12:38" (1/1) ... [2022-12-14 11:12:38,468 INFO L138 Inliner]: procedures = 99, calls = 352, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 934 [2022-12-14 11:12:38,468 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:12:38,469 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:12:38,469 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:12:38,469 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:12:38,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:12:38" (1/1) ... [2022-12-14 11:12:38,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:12:38" (1/1) ... [2022-12-14 11:12:38,480 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:12:38" (1/1) ... [2022-12-14 11:12:38,481 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:12:38" (1/1) ... [2022-12-14 11:12:38,503 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:12:38" (1/1) ... [2022-12-14 11:12:38,515 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:12:38" (1/1) ... [2022-12-14 11:12:38,520 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:12:38" (1/1) ... [2022-12-14 11:12:38,523 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:12:38" (1/1) ... [2022-12-14 11:12:38,529 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:12:38,530 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:12:38,530 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:12:38,530 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:12:38,531 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:12:38" (1/1) ... [2022-12-14 11:12:38,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:12:38,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:12:38,557 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:12:38,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:12:38,599 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-12-14 11:12:38,600 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-12-14 11:12:38,600 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 11:12:38,600 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 11:12:38,600 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 11:12:38,600 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 11:12:38,600 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-12-14 11:12:38,601 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-12-14 11:12:38,601 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 11:12:38,601 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 11:12:38,601 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 11:12:38,601 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 11:12:38,601 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 11:12:38,602 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 11:12:38,602 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-12-14 11:12:38,602 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-12-14 11:12:38,602 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-12-14 11:12:38,602 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-12-14 11:12:38,602 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 11:12:38,602 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 11:12:38,603 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 11:12:38,603 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 11:12:38,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:12:38,603 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-12-14 11:12:38,603 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-12-14 11:12:38,603 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-12-14 11:12:38,604 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-12-14 11:12:38,604 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-12-14 11:12:38,604 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-12-14 11:12:38,604 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 11:12:38,604 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 11:12:38,604 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 11:12:38,604 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 11:12:38,605 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-12-14 11:12:38,605 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-12-14 11:12:38,605 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 11:12:38,605 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 11:12:38,605 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 11:12:38,605 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 11:12:38,605 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 11:12:38,606 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 11:12:38,606 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 11:12:38,606 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 11:12:38,606 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 11:12:38,606 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 11:12:38,606 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 11:12:38,606 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 11:12:38,607 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 11:12:38,607 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 11:12:38,607 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2022-12-14 11:12:38,607 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2022-12-14 11:12:38,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 11:12:38,607 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 11:12:38,608 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 11:12:38,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:12:38,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:12:38,608 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 11:12:38,608 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 11:12:38,608 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-12-14 11:12:38,608 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-12-14 11:12:38,736 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:12:38,739 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:12:39,569 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:12:40,059 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:12:40,060 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 11:12:40,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:12:40 BoogieIcfgContainer [2022-12-14 11:12:40,063 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:12:40,065 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:12:40,065 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:12:40,068 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:12:40,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:12:37" (1/3) ... [2022-12-14 11:12:40,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78f543c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:12:40, skipping insertion in model container [2022-12-14 11:12:40,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:12:38" (2/3) ... [2022-12-14 11:12:40,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78f543c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:12:40, skipping insertion in model container [2022-12-14 11:12:40,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:12:40" (3/3) ... [2022-12-14 11:12:40,071 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product32.cil.c [2022-12-14 11:12:40,088 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:12:40,088 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 11:12:40,141 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:12:40,146 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;@2a8aa234, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:12:40,146 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 11:12:40,151 INFO L276 IsEmpty]: Start isEmpty. Operand has 401 states, 268 states have (on average 1.5671641791044777) internal successors, (420), 291 states have internal predecessors, (420), 103 states have call successors, (103), 28 states have call predecessors, (103), 28 states have return successors, (103), 96 states have call predecessors, (103), 103 states have call successors, (103) [2022-12-14 11:12:40,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 11:12:40,159 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:12:40,159 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:12:40,160 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:12:40,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:12:40,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1501564604, now seen corresponding path program 1 times [2022-12-14 11:12:40,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:12:40,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574476605] [2022-12-14 11:12:40,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:12:40,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:12:40,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:12:40,406 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 11:12:40,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:12:40,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574476605] [2022-12-14 11:12:40,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574476605] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:12:40,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:12:40,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:12:40,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087884704] [2022-12-14 11:12:40,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:12:40,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 11:12:40,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:12:40,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 11:12:40,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 11:12:40,435 INFO L87 Difference]: Start difference. First operand has 401 states, 268 states have (on average 1.5671641791044777) internal successors, (420), 291 states have internal predecessors, (420), 103 states have call successors, (103), 28 states have call predecessors, (103), 28 states have return successors, (103), 96 states have call predecessors, (103), 103 states have call successors, (103) 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-12-14 11:12:40,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:12:40,566 INFO L93 Difference]: Finished difference Result 419 states and 653 transitions. [2022-12-14 11:12:40,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 11:12:40,569 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 43 [2022-12-14 11:12:40,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:12:40,584 INFO L225 Difference]: With dead ends: 419 [2022-12-14 11:12:40,584 INFO L226 Difference]: Without dead ends: 397 [2022-12-14 11:12:40,588 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 11:12:40,591 INFO L413 NwaCegarLoop]: 579 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:12:40,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 579 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:12:40,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-12-14 11:12:40,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 397. [2022-12-14 11:12:40,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 266 states have (on average 1.556390977443609) internal successors, (414), 287 states have internal predecessors, (414), 103 states have call successors, (103), 28 states have call predecessors, (103), 27 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) [2022-12-14 11:12:40,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 615 transitions. [2022-12-14 11:12:40,659 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 615 transitions. Word has length 43 [2022-12-14 11:12:40,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:12:40,661 INFO L495 AbstractCegarLoop]: Abstraction has 397 states and 615 transitions. [2022-12-14 11:12:40,661 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-12-14 11:12:40,661 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 615 transitions. [2022-12-14 11:12:40,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 11:12:40,664 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:12:40,664 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:12:40,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 11:12:40,665 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:12:40,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:12:40,665 INFO L85 PathProgramCache]: Analyzing trace with hash 537521801, now seen corresponding path program 1 times [2022-12-14 11:12:40,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:12:40,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424874501] [2022-12-14 11:12:40,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:12:40,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:12:40,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:12:41,002 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 11:12:41,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:12:41,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424874501] [2022-12-14 11:12:41,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424874501] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:12:41,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:12:41,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 11:12:41,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603734684] [2022-12-14 11:12:41,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:12:41,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:12:41,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:12:41,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:12:41,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:12:41,006 INFO L87 Difference]: Start difference. First operand 397 states and 615 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 11:12:42,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:12:42,626 INFO L93 Difference]: Finished difference Result 1279 states and 2019 transitions. [2022-12-14 11:12:42,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:12:42,626 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), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 44 [2022-12-14 11:12:42,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:12:42,635 INFO L225 Difference]: With dead ends: 1279 [2022-12-14 11:12:42,635 INFO L226 Difference]: Without dead ends: 898 [2022-12-14 11:12:42,638 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 11:12:42,639 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 2030 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 1567 mSolverCounterSat, 802 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2101 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 2369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 802 IncrementalHoareTripleChecker+Valid, 1567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:12:42,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2101 Valid, 781 Invalid, 2369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [802 Valid, 1567 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 11:12:42,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2022-12-14 11:12:42,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 801. [2022-12-14 11:12:42,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 556 states have (on average 1.5719424460431655) internal successors, (874), 586 states have internal predecessors, (874), 193 states have call successors, (193), 50 states have call predecessors, (193), 51 states have return successors, (195), 177 states have call predecessors, (195), 188 states have call successors, (195) [2022-12-14 11:12:42,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1262 transitions. [2022-12-14 11:12:42,684 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1262 transitions. Word has length 44 [2022-12-14 11:12:42,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:12:42,684 INFO L495 AbstractCegarLoop]: Abstraction has 801 states and 1262 transitions. [2022-12-14 11:12:42,684 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), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 11:12:42,684 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1262 transitions. [2022-12-14 11:12:42,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 11:12:42,688 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:12:42,688 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:12:42,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 11:12:42,689 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:12:42,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:12:42,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1250383459, now seen corresponding path program 1 times [2022-12-14 11:12:42,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:12:42,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61728782] [2022-12-14 11:12:42,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:12:42,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:12:42,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:12:42,955 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:12:42,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:12:42,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61728782] [2022-12-14 11:12:42,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61728782] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:12:42,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:12:42,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 11:12:42,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898888371] [2022-12-14 11:12:42,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:12:42,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 11:12:42,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:12:42,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 11:12:42,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:12:42,957 INFO L87 Difference]: Start difference. First operand 801 states and 1262 transitions. Second operand has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 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 11:12:44,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:12:44,955 INFO L93 Difference]: Finished difference Result 2744 states and 4355 transitions. [2022-12-14 11:12:44,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 11:12:44,956 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 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 87 [2022-12-14 11:12:44,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:12:44,964 INFO L225 Difference]: With dead ends: 2744 [2022-12-14 11:12:44,964 INFO L226 Difference]: Without dead ends: 1959 [2022-12-14 11:12:44,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-12-14 11:12:44,968 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 1356 mSDsluCounter, 1463 mSDsCounter, 0 mSdLazyCounter, 4675 mSolverCounterSat, 680 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1435 SdHoareTripleChecker+Valid, 1962 SdHoareTripleChecker+Invalid, 5355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 680 IncrementalHoareTripleChecker+Valid, 4675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 11:12:44,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1435 Valid, 1962 Invalid, 5355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [680 Valid, 4675 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 11:12:44,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2022-12-14 11:12:45,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1806. [2022-12-14 11:12:45,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1219 states have (on average 1.542247744052502) internal successors, (1880), 1291 states have internal predecessors, (1880), 477 states have call successors, (477), 97 states have call predecessors, (477), 109 states have return successors, (496), 450 states have call predecessors, (496), 472 states have call successors, (496) [2022-12-14 11:12:45,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 2853 transitions. [2022-12-14 11:12:45,084 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 2853 transitions. Word has length 87 [2022-12-14 11:12:45,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:12:45,084 INFO L495 AbstractCegarLoop]: Abstraction has 1806 states and 2853 transitions. [2022-12-14 11:12:45,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 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 11:12:45,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 2853 transitions. [2022-12-14 11:12:45,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-14 11:12:45,089 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:12:45,089 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:12:45,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 11:12:45,090 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:12:45,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:12:45,090 INFO L85 PathProgramCache]: Analyzing trace with hash 147417259, now seen corresponding path program 1 times [2022-12-14 11:12:45,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:12:45,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630108824] [2022-12-14 11:12:45,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:12:45,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:12:45,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:12:45,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:12:45,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:12:45,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630108824] [2022-12-14 11:12:45,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630108824] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:12:45,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:12:45,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 11:12:45,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712110988] [2022-12-14 11:12:45,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:12:45,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:12:45,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:12:45,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:12:45,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:12:45,317 INFO L87 Difference]: Start difference. First operand 1806 states and 2853 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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 11:12:46,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:12:46,839 INFO L93 Difference]: Finished difference Result 4527 states and 7160 transitions. [2022-12-14 11:12:46,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 11:12:46,839 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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 88 [2022-12-14 11:12:46,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:12:46,851 INFO L225 Difference]: With dead ends: 4527 [2022-12-14 11:12:46,851 INFO L226 Difference]: Without dead ends: 2739 [2022-12-14 11:12:46,860 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 11:12:46,861 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 1191 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 2660 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1268 SdHoareTripleChecker+Valid, 1472 SdHoareTripleChecker+Invalid, 3111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 2660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:12:46,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1268 Valid, 1472 Invalid, 3111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 2660 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 11:12:46,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2739 states. [2022-12-14 11:12:46,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2739 to 2648. [2022-12-14 11:12:46,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 1811 states have (on average 1.549420209828824) internal successors, (2806), 1910 states have internal predecessors, (2806), 662 states have call successors, (662), 154 states have call predecessors, (662), 174 states have return successors, (709), 627 states have call predecessors, (709), 657 states have call successors, (709) [2022-12-14 11:12:46,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 4177 transitions. [2022-12-14 11:12:46,990 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 4177 transitions. Word has length 88 [2022-12-14 11:12:46,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:12:46,991 INFO L495 AbstractCegarLoop]: Abstraction has 2648 states and 4177 transitions. [2022-12-14 11:12:46,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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 11:12:46,991 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 4177 transitions. [2022-12-14 11:12:46,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-14 11:12:46,993 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:12:46,993 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:12:46,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 11:12:46,993 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:12:46,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:12:46,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1796854371, now seen corresponding path program 1 times [2022-12-14 11:12:46,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:12:46,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592191720] [2022-12-14 11:12:46,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:12:46,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:12:47,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:12:47,159 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:12:47,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:12:47,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592191720] [2022-12-14 11:12:47,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592191720] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:12:47,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:12:47,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 11:12:47,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702697888] [2022-12-14 11:12:47,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:12:47,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:12:47,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:12:47,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:12:47,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:12:47,162 INFO L87 Difference]: Start difference. First operand 2648 states and 4177 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, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 11:12:47,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:12:47,777 INFO L93 Difference]: Finished difference Result 2749 states and 4343 transitions. [2022-12-14 11:12:47,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:12:47,778 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, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 92 [2022-12-14 11:12:47,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:12:47,794 INFO L225 Difference]: With dead ends: 2749 [2022-12-14 11:12:47,794 INFO L226 Difference]: Without dead ends: 2734 [2022-12-14 11:12:47,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:12:47,797 INFO L413 NwaCegarLoop]: 575 mSDtfsCounter, 679 mSDsluCounter, 1317 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 1892 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:12:47,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [680 Valid, 1892 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 11:12:47,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2022-12-14 11:12:47,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 2654. [2022-12-14 11:12:47,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2654 states, 1817 states have (on average 1.5476059438635112) internal successors, (2812), 1916 states have internal predecessors, (2812), 662 states have call successors, (662), 154 states have call predecessors, (662), 174 states have return successors, (709), 627 states have call predecessors, (709), 657 states have call successors, (709) [2022-12-14 11:12:47,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 4183 transitions. [2022-12-14 11:12:47,921 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 4183 transitions. Word has length 92 [2022-12-14 11:12:47,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:12:47,922 INFO L495 AbstractCegarLoop]: Abstraction has 2654 states and 4183 transitions. [2022-12-14 11:12:47,922 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, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 11:12:47,922 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 4183 transitions. [2022-12-14 11:12:47,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-12-14 11:12:47,925 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:12:47,925 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:12:47,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 11:12:47,925 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:12:47,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:12:47,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1885511725, now seen corresponding path program 1 times [2022-12-14 11:12:47,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:12:47,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758302618] [2022-12-14 11:12:47,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:12:47,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:12:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:12:48,276 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:12:48,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:12:48,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758302618] [2022-12-14 11:12:48,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758302618] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:12:48,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:12:48,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-14 11:12:48,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020119921] [2022-12-14 11:12:48,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:12:48,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 11:12:48,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:12:48,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 11:12:48,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-12-14 11:12:48,279 INFO L87 Difference]: Start difference. First operand 2654 states and 4183 transitions. Second operand has 13 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2022-12-14 11:12:51,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:12:51,736 INFO L93 Difference]: Finished difference Result 3071 states and 4805 transitions. [2022-12-14 11:12:51,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-14 11:12:51,737 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) Word has length 97 [2022-12-14 11:12:51,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:12:51,747 INFO L225 Difference]: With dead ends: 3071 [2022-12-14 11:12:51,748 INFO L226 Difference]: Without dead ends: 3054 [2022-12-14 11:12:51,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 11:12:51,750 INFO L413 NwaCegarLoop]: 506 mSDtfsCounter, 2569 mSDsluCounter, 3104 mSDsCounter, 0 mSdLazyCounter, 9165 mSolverCounterSat, 1502 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2598 SdHoareTripleChecker+Valid, 3610 SdHoareTripleChecker+Invalid, 10667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1502 IncrementalHoareTripleChecker+Valid, 9165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-12-14 11:12:51,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2598 Valid, 3610 Invalid, 10667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1502 Valid, 9165 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-12-14 11:12:51,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3054 states. [2022-12-14 11:12:51,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3054 to 2858. [2022-12-14 11:12:51,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2858 states, 1972 states have (on average 1.5502028397565923) internal successors, (3057), 2069 states have internal predecessors, (3057), 680 states have call successors, (680), 186 states have call predecessors, (680), 205 states have return successors, (731), 646 states have call predecessors, (731), 675 states have call successors, (731) [2022-12-14 11:12:51,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2858 states to 2858 states and 4468 transitions. [2022-12-14 11:12:51,894 INFO L78 Accepts]: Start accepts. Automaton has 2858 states and 4468 transitions. Word has length 97 [2022-12-14 11:12:51,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:12:51,895 INFO L495 AbstractCegarLoop]: Abstraction has 2858 states and 4468 transitions. [2022-12-14 11:12:51,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2022-12-14 11:12:51,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2858 states and 4468 transitions. [2022-12-14 11:12:51,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-12-14 11:12:51,897 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:12:51,897 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-14 11:12:51,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 11:12:51,898 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:12:51,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:12:51,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1869992431, now seen corresponding path program 1 times [2022-12-14 11:12:51,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:12:51,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943883690] [2022-12-14 11:12:51,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:12:51,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:12:51,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:12:51,967 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 11:12:51,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:12:51,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943883690] [2022-12-14 11:12:51,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943883690] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:12:51,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:12:51,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:12:51,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073497459] [2022-12-14 11:12:51,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:12:51,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:12:51,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:12:51,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:12:51,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:12:51,969 INFO L87 Difference]: Start difference. First operand 2858 states and 4468 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 11:12:52,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:12:52,291 INFO L93 Difference]: Finished difference Result 7297 states and 11483 transitions. [2022-12-14 11:12:52,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:12:52,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 104 [2022-12-14 11:12:52,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:12:52,310 INFO L225 Difference]: With dead ends: 7297 [2022-12-14 11:12:52,310 INFO L226 Difference]: Without dead ends: 4459 [2022-12-14 11:12:52,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:12:52,321 INFO L413 NwaCegarLoop]: 702 mSDtfsCounter, 571 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 1260 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:12:52,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [571 Valid, 1260 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:12:52,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4459 states. [2022-12-14 11:12:52,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4459 to 4406. [2022-12-14 11:12:52,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4406 states, 3050 states have (on average 1.5472131147540984) internal successors, (4719), 3207 states have internal predecessors, (4719), 1040 states have call successors, (1040), 281 states have call predecessors, (1040), 315 states have return successors, (1154), 981 states have call predecessors, (1154), 1035 states have call successors, (1154) [2022-12-14 11:12:52,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4406 states to 4406 states and 6913 transitions. [2022-12-14 11:12:52,534 INFO L78 Accepts]: Start accepts. Automaton has 4406 states and 6913 transitions. Word has length 104 [2022-12-14 11:12:52,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:12:52,534 INFO L495 AbstractCegarLoop]: Abstraction has 4406 states and 6913 transitions. [2022-12-14 11:12:52,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 11:12:52,535 INFO L276 IsEmpty]: Start isEmpty. Operand 4406 states and 6913 transitions. [2022-12-14 11:12:52,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-12-14 11:12:52,537 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:12:52,537 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-14 11:12:52,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 11:12:52,537 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:12:52,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:12:52,538 INFO L85 PathProgramCache]: Analyzing trace with hash 2134902153, now seen corresponding path program 1 times [2022-12-14 11:12:52,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:12:52,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916480784] [2022-12-14 11:12:52,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:12:52,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:12:52,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:12:52,612 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 11:12:52,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:12:52,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916480784] [2022-12-14 11:12:52,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916480784] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:12:52,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:12:52,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:12:52,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403345204] [2022-12-14 11:12:52,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:12:52,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:12:52,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:12:52,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:12:52,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:12:52,614 INFO L87 Difference]: Start difference. First operand 4406 states and 6913 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 11:12:53,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:12:53,029 INFO L93 Difference]: Finished difference Result 11940 states and 18899 transitions. [2022-12-14 11:12:53,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:12:53,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 105 [2022-12-14 11:12:53,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:12:53,060 INFO L225 Difference]: With dead ends: 11940 [2022-12-14 11:12:53,061 INFO L226 Difference]: Without dead ends: 7557 [2022-12-14 11:12:53,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:12:53,075 INFO L413 NwaCegarLoop]: 705 mSDtfsCounter, 570 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:12:53,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 1266 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:12:53,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7557 states. [2022-12-14 11:12:53,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7557 to 7503. [2022-12-14 11:12:53,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7503 states, 5207 states have (on average 1.544267332437104) internal successors, (8041), 5484 states have internal predecessors, (8041), 1760 states have call successors, (1760), 471 states have call predecessors, (1760), 535 states have return successors, (2042), 1651 states have call predecessors, (2042), 1755 states have call successors, (2042) [2022-12-14 11:12:53,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7503 states to 7503 states and 11843 transitions. [2022-12-14 11:12:53,490 INFO L78 Accepts]: Start accepts. Automaton has 7503 states and 11843 transitions. Word has length 105 [2022-12-14 11:12:53,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:12:53,490 INFO L495 AbstractCegarLoop]: Abstraction has 7503 states and 11843 transitions. [2022-12-14 11:12:53,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 11:12:53,491 INFO L276 IsEmpty]: Start isEmpty. Operand 7503 states and 11843 transitions. [2022-12-14 11:12:53,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-12-14 11:12:53,495 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:12:53,495 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-14 11:12:53,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 11:12:53,495 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:12:53,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:12:53,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1757172849, now seen corresponding path program 1 times [2022-12-14 11:12:53,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:12:53,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835180284] [2022-12-14 11:12:53,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:12:53,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:12:53,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:12:53,562 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 11:12:53,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:12:53,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835180284] [2022-12-14 11:12:53,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835180284] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:12:53,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:12:53,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:12:53,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032805184] [2022-12-14 11:12:53,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:12:53,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:12:53,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:12:53,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:12:53,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:12:53,564 INFO L87 Difference]: Start difference. First operand 7503 states and 11843 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 11:12:54,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:12:54,238 INFO L93 Difference]: Finished difference Result 21227 states and 33966 transitions. [2022-12-14 11:12:54,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:12:54,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 106 [2022-12-14 11:12:54,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:12:54,295 INFO L225 Difference]: With dead ends: 21227 [2022-12-14 11:12:54,295 INFO L226 Difference]: Without dead ends: 13753 [2022-12-14 11:12:54,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:12:54,321 INFO L413 NwaCegarLoop]: 708 mSDtfsCounter, 569 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 1272 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:12:54,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [569 Valid, 1272 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:12:54,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13753 states. [2022-12-14 11:12:54,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13753 to 13698. [2022-12-14 11:12:54,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13698 states, 9522 states have (on average 1.540957781978576) internal successors, (14673), 10039 states have internal predecessors, (14673), 3200 states have call successors, (3200), 851 states have call predecessors, (3200), 975 states have return successors, (3992), 2991 states have call predecessors, (3992), 3195 states have call successors, (3992) [2022-12-14 11:12:54,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13698 states to 13698 states and 21865 transitions. [2022-12-14 11:12:54,988 INFO L78 Accepts]: Start accepts. Automaton has 13698 states and 21865 transitions. Word has length 106 [2022-12-14 11:12:54,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:12:54,989 INFO L495 AbstractCegarLoop]: Abstraction has 13698 states and 21865 transitions. [2022-12-14 11:12:54,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 11:12:54,989 INFO L276 IsEmpty]: Start isEmpty. Operand 13698 states and 21865 transitions. [2022-12-14 11:12:54,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-12-14 11:12:54,991 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:12:54,992 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-14 11:12:54,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 11:12:54,992 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:12:54,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:12:54,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1362497077, now seen corresponding path program 1 times [2022-12-14 11:12:54,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:12:54,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850711490] [2022-12-14 11:12:54,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:12:54,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:12:55,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:12:55,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 11:12:55,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:12:55,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850711490] [2022-12-14 11:12:55,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850711490] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:12:55,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:12:55,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:12:55,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382311957] [2022-12-14 11:12:55,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:12:55,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:12:55,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:12:55,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:12:55,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:12:55,060 INFO L87 Difference]: Start difference. First operand 13698 states and 21865 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 11:12:56,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:12:56,518 INFO L93 Difference]: Finished difference Result 39802 states and 64949 transitions. [2022-12-14 11:12:56,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:12:56,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 107 [2022-12-14 11:12:56,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:12:56,607 INFO L225 Difference]: With dead ends: 39802 [2022-12-14 11:12:56,607 INFO L226 Difference]: Without dead ends: 26145 [2022-12-14 11:12:56,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:12:56,642 INFO L413 NwaCegarLoop]: 711 mSDtfsCounter, 568 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 1278 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:12:56,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 1278 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:12:56,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26145 states. [2022-12-14 11:12:57,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26145 to 26089. [2022-12-14 11:12:57,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26089 states, 18153 states have (on average 1.5372114801961108) internal successors, (27905), 19150 states have internal predecessors, (27905), 6080 states have call successors, (6080), 1611 states have call predecessors, (6080), 1855 states have return successors, (8510), 5671 states have call predecessors, (8510), 6075 states have call successors, (8510) [2022-12-14 11:12:57,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26089 states to 26089 states and 42495 transitions. [2022-12-14 11:12:57,839 INFO L78 Accepts]: Start accepts. Automaton has 26089 states and 42495 transitions. Word has length 107 [2022-12-14 11:12:57,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:12:57,839 INFO L495 AbstractCegarLoop]: Abstraction has 26089 states and 42495 transitions. [2022-12-14 11:12:57,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 11:12:57,840 INFO L276 IsEmpty]: Start isEmpty. Operand 26089 states and 42495 transitions. [2022-12-14 11:12:57,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 11:12:57,842 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:12:57,842 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-14 11:12:57,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 11:12:57,843 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:12:57,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:12:57,843 INFO L85 PathProgramCache]: Analyzing trace with hash 711986931, now seen corresponding path program 1 times [2022-12-14 11:12:57,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:12:57,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248516932] [2022-12-14 11:12:57,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:12:57,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:12:57,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:12:57,908 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 11:12:57,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:12:57,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248516932] [2022-12-14 11:12:57,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248516932] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:12:57,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:12:57,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:12:57,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702861787] [2022-12-14 11:12:57,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:12:57,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:12:57,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:12:57,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:12:57,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:12:57,910 INFO L87 Difference]: Start difference. First operand 26089 states and 42495 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 11:12:59,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:12:59,442 INFO L93 Difference]: Finished difference Result 27695 states and 45308 transitions. [2022-12-14 11:12:59,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:12:59,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 108 [2022-12-14 11:12:59,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:12:59,559 INFO L225 Difference]: With dead ends: 27695 [2022-12-14 11:12:59,559 INFO L226 Difference]: Without dead ends: 27684 [2022-12-14 11:12:59,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:12:59,578 INFO L413 NwaCegarLoop]: 704 mSDtfsCounter, 554 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:12:59,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [554 Valid, 1276 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:12:59,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27684 states. [2022-12-14 11:13:00,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27684 to 27615. [2022-12-14 11:13:00,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27615 states, 19212 states have (on average 1.5356547990839058) internal successors, (29503), 20271 states have internal predecessors, (29503), 6438 states have call successors, (6438), 1706 states have call predecessors, (6438), 1964 states have return successors, (9241), 6001 states have call predecessors, (9241), 6433 states have call successors, (9241) [2022-12-14 11:13:00,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27615 states to 27615 states and 45182 transitions. [2022-12-14 11:13:00,860 INFO L78 Accepts]: Start accepts. Automaton has 27615 states and 45182 transitions. Word has length 108 [2022-12-14 11:13:00,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:13:00,861 INFO L495 AbstractCegarLoop]: Abstraction has 27615 states and 45182 transitions. [2022-12-14 11:13:00,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 11:13:00,861 INFO L276 IsEmpty]: Start isEmpty. Operand 27615 states and 45182 transitions. [2022-12-14 11:13:00,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-12-14 11:13:00,865 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:13:00,866 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:13:00,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 11:13:00,866 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:13:00,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:13:00,866 INFO L85 PathProgramCache]: Analyzing trace with hash 2030742268, now seen corresponding path program 1 times [2022-12-14 11:13:00,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:13:00,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724199063] [2022-12-14 11:13:00,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:13:00,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:13:00,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:13:00,993 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-12-14 11:13:00,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:13:00,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724199063] [2022-12-14 11:13:00,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724199063] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:13:00,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:13:00,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:13:00,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556595892] [2022-12-14 11:13:00,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:13:00,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:13:00,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:13:00,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:13:00,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:13:00,995 INFO L87 Difference]: Start difference. First operand 27615 states and 45182 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-12-14 11:13:02,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:13:02,257 INFO L93 Difference]: Finished difference Result 56127 states and 93776 transitions. [2022-12-14 11:13:02,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:13:02,257 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 161 [2022-12-14 11:13:02,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:13:02,359 INFO L225 Difference]: With dead ends: 56127 [2022-12-14 11:13:02,359 INFO L226 Difference]: Without dead ends: 28533 [2022-12-14 11:13:02,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:13:02,439 INFO L413 NwaCegarLoop]: 584 mSDtfsCounter, 30 mSDsluCounter, 1133 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1717 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:13:02,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1717 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:13:02,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28533 states. [2022-12-14 11:13:04,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28533 to 27723. [2022-12-14 11:13:04,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27723 states, 19320 states have (on average 1.5326604554865424) internal successors, (29611), 20379 states have internal predecessors, (29611), 6438 states have call successors, (6438), 1706 states have call predecessors, (6438), 1964 states have return successors, (9241), 6001 states have call predecessors, (9241), 6433 states have call successors, (9241) [2022-12-14 11:13:04,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27723 states to 27723 states and 45290 transitions. [2022-12-14 11:13:04,471 INFO L78 Accepts]: Start accepts. Automaton has 27723 states and 45290 transitions. Word has length 161 [2022-12-14 11:13:04,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:13:04,472 INFO L495 AbstractCegarLoop]: Abstraction has 27723 states and 45290 transitions. [2022-12-14 11:13:04,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-12-14 11:13:04,472 INFO L276 IsEmpty]: Start isEmpty. Operand 27723 states and 45290 transitions. [2022-12-14 11:13:04,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-12-14 11:13:04,478 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:13:04,478 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2022-12-14 11:13:04,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 11:13:04,478 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:13:04,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:13:04,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1717865814, now seen corresponding path program 1 times [2022-12-14 11:13:04,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:13:04,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71696017] [2022-12-14 11:13:04,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:13:04,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:13:04,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:13:04,909 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-12-14 11:13:04,910 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:13:04,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71696017] [2022-12-14 11:13:04,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71696017] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:13:04,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941531793] [2022-12-14 11:13:04,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:13:04,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:13:04,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:13:04,911 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:13:04,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 11:13:05,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:13:05,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 2147 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:13:05,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:13:05,332 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 11:13:05,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:13:05,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941531793] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:13:05,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:13:05,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2022-12-14 11:13:05,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389304676] [2022-12-14 11:13:05,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:13:05,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:13:05,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:13:05,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:13:05,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-12-14 11:13:05,334 INFO L87 Difference]: Start difference. First operand 27723 states and 45290 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-12-14 11:13:06,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:13:06,822 INFO L93 Difference]: Finished difference Result 57531 states and 97014 transitions. [2022-12-14 11:13:06,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:13:06,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 168 [2022-12-14 11:13:06,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:13:06,937 INFO L225 Difference]: With dead ends: 57531 [2022-12-14 11:13:06,938 INFO L226 Difference]: Without dead ends: 29829 [2022-12-14 11:13:07,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-12-14 11:13:07,016 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 213 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:13:07,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1506 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:13:07,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29829 states. [2022-12-14 11:13:08,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29829 to 29829. [2022-12-14 11:13:08,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29829 states, 21372 states have (on average 1.5699513381995134) internal successors, (33553), 22431 states have internal predecessors, (33553), 6438 states have call successors, (6438), 1760 states have call predecessors, (6438), 2018 states have return successors, (9241), 6001 states have call predecessors, (9241), 6433 states have call successors, (9241) [2022-12-14 11:13:08,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29829 states to 29829 states and 49232 transitions. [2022-12-14 11:13:08,374 INFO L78 Accepts]: Start accepts. Automaton has 29829 states and 49232 transitions. Word has length 168 [2022-12-14 11:13:08,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:13:08,374 INFO L495 AbstractCegarLoop]: Abstraction has 29829 states and 49232 transitions. [2022-12-14 11:13:08,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-12-14 11:13:08,375 INFO L276 IsEmpty]: Start isEmpty. Operand 29829 states and 49232 transitions. [2022-12-14 11:13:08,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-12-14 11:13:08,379 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:13:08,379 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 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] [2022-12-14 11:13:08,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 11:13:08,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:13:08,580 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:13:08,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:13:08,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1192575063, now seen corresponding path program 1 times [2022-12-14 11:13:08,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:13:08,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787281989] [2022-12-14 11:13:08,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:13:08,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:13:08,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:13:08,729 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-14 11:13:08,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:13:08,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787281989] [2022-12-14 11:13:08,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787281989] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:13:08,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452134500] [2022-12-14 11:13:08,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:13:08,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:13:08,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:13:08,730 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:13:08,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 11:13:08,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:13:08,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 2152 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:13:08,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:13:09,019 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 11:13:09,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:13:09,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452134500] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:13:09,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:13:09,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 11:13:09,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491181916] [2022-12-14 11:13:09,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:13:09,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:13:09,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:13:09,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:13:09,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:13:09,021 INFO L87 Difference]: Start difference. First operand 29829 states and 49232 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-12-14 11:13:10,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:13:10,301 INFO L93 Difference]: Finished difference Result 61743 states and 104758 transitions. [2022-12-14 11:13:10,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:13:10,302 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 173 [2022-12-14 11:13:10,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:13:10,418 INFO L225 Difference]: With dead ends: 61743 [2022-12-14 11:13:10,418 INFO L226 Difference]: Without dead ends: 31935 [2022-12-14 11:13:10,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 173 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 11:13:10,508 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 211 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:13:10,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1506 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:13:10,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31935 states. [2022-12-14 11:13:11,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31935 to 31935. [2022-12-14 11:13:11,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31935 states, 23424 states have (on average 1.600708674863388) internal successors, (37495), 24483 states have internal predecessors, (37495), 6438 states have call successors, (6438), 1814 states have call predecessors, (6438), 2072 states have return successors, (9241), 6001 states have call predecessors, (9241), 6433 states have call successors, (9241) [2022-12-14 11:13:11,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31935 states to 31935 states and 53174 transitions. [2022-12-14 11:13:11,844 INFO L78 Accepts]: Start accepts. Automaton has 31935 states and 53174 transitions. Word has length 173 [2022-12-14 11:13:11,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:13:11,844 INFO L495 AbstractCegarLoop]: Abstraction has 31935 states and 53174 transitions. [2022-12-14 11:13:11,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-12-14 11:13:11,845 INFO L276 IsEmpty]: Start isEmpty. Operand 31935 states and 53174 transitions. [2022-12-14 11:13:11,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-12-14 11:13:11,849 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:13:11,849 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 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] [2022-12-14 11:13:11,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 11:13:12,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 11:13:12,052 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:13:12,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:13:12,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1090934169, now seen corresponding path program 1 times [2022-12-14 11:13:12,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:13:12,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278214801] [2022-12-14 11:13:12,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:13:12,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:13:12,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:13:12,216 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-12-14 11:13:12,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:13:12,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278214801] [2022-12-14 11:13:12,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278214801] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:13:12,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579364527] [2022-12-14 11:13:12,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:13:12,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:13:12,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:13:12,218 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:13:12,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 11:13:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:13:12,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 2156 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:13:12,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:13:12,510 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 11:13:12,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:13:12,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579364527] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:13:12,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:13:12,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 11:13:12,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721270210] [2022-12-14 11:13:12,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:13:12,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:13:12,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:13:12,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:13:12,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:13:12,512 INFO L87 Difference]: Start difference. First operand 31935 states and 53174 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-12-14 11:13:14,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:13:14,386 INFO L93 Difference]: Finished difference Result 65955 states and 112502 transitions. [2022-12-14 11:13:14,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:13:14,387 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 177 [2022-12-14 11:13:14,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:13:14,504 INFO L225 Difference]: With dead ends: 65955 [2022-12-14 11:13:14,505 INFO L226 Difference]: Without dead ends: 34041 [2022-12-14 11:13:14,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 177 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 11:13:14,586 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 209 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:13:14,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1506 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:13:14,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34041 states. [2022-12-14 11:13:15,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34041 to 34041. [2022-12-14 11:13:15,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34041 states, 25476 states have (on average 1.6265112262521588) internal successors, (41437), 26535 states have internal predecessors, (41437), 6438 states have call successors, (6438), 1868 states have call predecessors, (6438), 2126 states have return successors, (9241), 6001 states have call predecessors, (9241), 6433 states have call successors, (9241) [2022-12-14 11:13:15,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34041 states to 34041 states and 57116 transitions. [2022-12-14 11:13:15,938 INFO L78 Accepts]: Start accepts. Automaton has 34041 states and 57116 transitions. Word has length 177 [2022-12-14 11:13:15,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:13:15,938 INFO L495 AbstractCegarLoop]: Abstraction has 34041 states and 57116 transitions. [2022-12-14 11:13:15,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-12-14 11:13:15,939 INFO L276 IsEmpty]: Start isEmpty. Operand 34041 states and 57116 transitions. [2022-12-14 11:13:15,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-12-14 11:13:15,944 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:13:15,944 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:13:15,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 11:13:16,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 11:13:16,146 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:13:16,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:13:16,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1738075682, now seen corresponding path program 1 times [2022-12-14 11:13:16,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:13:16,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720421977] [2022-12-14 11:13:16,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:13:16,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:13:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:13:16,319 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-12-14 11:13:16,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:13:16,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720421977] [2022-12-14 11:13:16,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720421977] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:13:16,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670799790] [2022-12-14 11:13:16,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:13:16,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:13:16,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:13:16,320 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:13:16,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 11:13:16,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:13:16,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 2159 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:13:16,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:13:16,570 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 11:13:16,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:13:16,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670799790] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:13:16,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:13:16,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 11:13:16,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745551314] [2022-12-14 11:13:16,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:13:16,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:13:16,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:13:16,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:13:16,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:13:16,572 INFO L87 Difference]: Start difference. First operand 34041 states and 57116 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-12-14 11:13:17,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:13:17,904 INFO L93 Difference]: Finished difference Result 70167 states and 120246 transitions. [2022-12-14 11:13:17,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:13:17,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 180 [2022-12-14 11:13:17,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:13:18,031 INFO L225 Difference]: With dead ends: 70167 [2022-12-14 11:13:18,031 INFO L226 Difference]: Without dead ends: 36147 [2022-12-14 11:13:18,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 180 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 11:13:18,124 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 207 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:13:18,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1506 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:13:18,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36147 states. [2022-12-14 11:13:19,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36147 to 36147. [2022-12-14 11:13:19,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36147 states, 27528 states have (on average 1.6484670154024992) internal successors, (45379), 28587 states have internal predecessors, (45379), 6438 states have call successors, (6438), 1922 states have call predecessors, (6438), 2180 states have return successors, (9241), 6001 states have call predecessors, (9241), 6433 states have call successors, (9241) [2022-12-14 11:13:19,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36147 states to 36147 states and 61058 transitions. [2022-12-14 11:13:19,533 INFO L78 Accepts]: Start accepts. Automaton has 36147 states and 61058 transitions. Word has length 180 [2022-12-14 11:13:19,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:13:19,533 INFO L495 AbstractCegarLoop]: Abstraction has 36147 states and 61058 transitions. [2022-12-14 11:13:19,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-12-14 11:13:19,533 INFO L276 IsEmpty]: Start isEmpty. Operand 36147 states and 61058 transitions. [2022-12-14 11:13:19,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-12-14 11:13:19,538 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:13:19,538 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:13:19,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 11:13:19,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 11:13:19,740 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:13:19,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:13:19,741 INFO L85 PathProgramCache]: Analyzing trace with hash -2077031216, now seen corresponding path program 1 times [2022-12-14 11:13:19,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:13:19,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750003516] [2022-12-14 11:13:19,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:13:19,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:13:19,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:13:20,041 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-12-14 11:13:20,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:13:20,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750003516] [2022-12-14 11:13:20,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750003516] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:13:20,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346390527] [2022-12-14 11:13:20,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:13:20,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:13:20,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:13:20,043 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:13:20,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 11:13:20,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:13:20,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 2155 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 11:13:20,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:13:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-14 11:13:20,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:13:20,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346390527] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:13:20,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:13:20,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-12-14 11:13:20,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321113525] [2022-12-14 11:13:20,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:13:20,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:13:20,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:13:20,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:13:20,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-12-14 11:13:20,441 INFO L87 Difference]: Start difference. First operand 36147 states and 61058 transitions. Second operand has 6 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 3 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) [2022-12-14 11:13:21,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:13:21,965 INFO L93 Difference]: Finished difference Result 72370 states and 122441 transitions. [2022-12-14 11:13:21,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:13:21,965 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 3 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) Word has length 182 [2022-12-14 11:13:21,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:13:22,090 INFO L225 Difference]: With dead ends: 72370 [2022-12-14 11:13:22,090 INFO L226 Difference]: Without dead ends: 36289 [2022-12-14 11:13:22,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-12-14 11:13:22,178 INFO L413 NwaCegarLoop]: 659 mSDtfsCounter, 336 mSDsluCounter, 2141 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 2800 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:13:22,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 2800 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:13:22,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36289 states. [2022-12-14 11:13:23,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36289 to 36161. [2022-12-14 11:13:23,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36161 states, 27535 states have (on average 1.6438714363537317) internal successors, (45264), 28601 states have internal predecessors, (45264), 6438 states have call successors, (6438), 1922 states have call predecessors, (6438), 2187 states have return successors, (9255), 6001 states have call predecessors, (9255), 6433 states have call successors, (9255) [2022-12-14 11:13:23,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36161 states to 36161 states and 60957 transitions. [2022-12-14 11:13:23,602 INFO L78 Accepts]: Start accepts. Automaton has 36161 states and 60957 transitions. Word has length 182 [2022-12-14 11:13:23,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:13:23,602 INFO L495 AbstractCegarLoop]: Abstraction has 36161 states and 60957 transitions. [2022-12-14 11:13:23,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 3 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) [2022-12-14 11:13:23,603 INFO L276 IsEmpty]: Start isEmpty. Operand 36161 states and 60957 transitions. [2022-12-14 11:13:23,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-12-14 11:13:23,608 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:13:23,608 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:13:23,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 11:13:23,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 11:13:23,810 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:13:23,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:13:23,811 INFO L85 PathProgramCache]: Analyzing trace with hash 274122052, now seen corresponding path program 1 times [2022-12-14 11:13:23,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:13:23,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864671097] [2022-12-14 11:13:23,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:13:23,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:13:23,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:13:24,076 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-12-14 11:13:24,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:13:24,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864671097] [2022-12-14 11:13:24,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864671097] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:13:24,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866680255] [2022-12-14 11:13:24,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:13:24,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:13:24,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:13:24,078 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:13:24,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 11:13:24,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:13:24,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 2160 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 11:13:24,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:13:24,542 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 11:13:24,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:13:24,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866680255] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:13:24,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:13:24,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2022-12-14 11:13:24,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121419442] [2022-12-14 11:13:24,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:13:24,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 11:13:24,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:13:24,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 11:13:24,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-12-14 11:13:24,544 INFO L87 Difference]: Start difference. First operand 36161 states and 60957 transitions. Second operand has 9 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 6 states have call successors, (30), 5 states have call predecessors, (30), 6 states have return successors, (29), 7 states have call predecessors, (29), 5 states have call successors, (29) [2022-12-14 11:13:28,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:13:28,603 INFO L93 Difference]: Finished difference Result 86827 states and 147319 transitions. [2022-12-14 11:13:28,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 11:13:28,604 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 6 states have call successors, (30), 5 states have call predecessors, (30), 6 states have return successors, (29), 7 states have call predecessors, (29), 5 states have call successors, (29) Word has length 185 [2022-12-14 11:13:28,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:13:28,798 INFO L225 Difference]: With dead ends: 86827 [2022-12-14 11:13:28,798 INFO L226 Difference]: Without dead ends: 50690 [2022-12-14 11:13:28,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-12-14 11:13:28,906 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 1615 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 4943 mSolverCounterSat, 701 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1756 SdHoareTripleChecker+Valid, 1780 SdHoareTripleChecker+Invalid, 5644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 701 IncrementalHoareTripleChecker+Valid, 4943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:13:28,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1756 Valid, 1780 Invalid, 5644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [701 Valid, 4943 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 11:13:28,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50690 states. [2022-12-14 11:13:30,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50690 to 49457. [2022-12-14 11:13:30,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49457 states, 37188 states have (on average 1.6123480692696568) internal successors, (59960), 38697 states have internal predecessors, (59960), 9110 states have call successors, (9110), 2826 states have call predecessors, (9110), 3158 states have return successors, (12705), 8478 states have call predecessors, (12705), 9105 states have call successors, (12705) [2022-12-14 11:13:31,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49457 states to 49457 states and 81775 transitions. [2022-12-14 11:13:31,084 INFO L78 Accepts]: Start accepts. Automaton has 49457 states and 81775 transitions. Word has length 185 [2022-12-14 11:13:31,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:13:31,084 INFO L495 AbstractCegarLoop]: Abstraction has 49457 states and 81775 transitions. [2022-12-14 11:13:31,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 6 states have call successors, (30), 5 states have call predecessors, (30), 6 states have return successors, (29), 7 states have call predecessors, (29), 5 states have call successors, (29) [2022-12-14 11:13:31,085 INFO L276 IsEmpty]: Start isEmpty. Operand 49457 states and 81775 transitions. [2022-12-14 11:13:31,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-12-14 11:13:31,091 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:13:31,091 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:13:31,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 11:13:31,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 11:13:31,293 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:13:31,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:13:31,294 INFO L85 PathProgramCache]: Analyzing trace with hash 678372205, now seen corresponding path program 1 times [2022-12-14 11:13:31,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:13:31,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703152731] [2022-12-14 11:13:31,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:13:31,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:13:31,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:13:31,584 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-12-14 11:13:31,584 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:13:31,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703152731] [2022-12-14 11:13:31,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703152731] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:13:31,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963066937] [2022-12-14 11:13:31,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:13:31,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:13:31,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:13:31,585 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:13:31,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 11:13:31,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:13:31,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 2161 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:13:31,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:13:31,944 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-14 11:13:31,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:13:31,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963066937] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:13:31,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:13:31,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-12-14 11:13:31,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562048924] [2022-12-14 11:13:31,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:13:31,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:13:31,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:13:31,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:13:31,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-12-14 11:13:31,946 INFO L87 Difference]: Start difference. First operand 49457 states and 81775 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 1 states have call successors, (29) [2022-12-14 11:13:33,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:13:33,758 INFO L93 Difference]: Finished difference Result 50508 states and 86008 transitions. [2022-12-14 11:13:33,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:13:33,759 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 1 states have call successors, (29) Word has length 185 [2022-12-14 11:13:33,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:13:33,957 INFO L225 Difference]: With dead ends: 50508 [2022-12-14 11:13:33,958 INFO L226 Difference]: Without dead ends: 50422 [2022-12-14 11:13:33,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-12-14 11:13:33,991 INFO L413 NwaCegarLoop]: 612 mSDtfsCounter, 47 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1783 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:13:33,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 1783 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:13:34,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50422 states. [2022-12-14 11:13:36,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50422 to 49589. [2022-12-14 11:13:36,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49589 states, 37320 states have (on average 1.610182207931404) internal successors, (60092), 38829 states have internal predecessors, (60092), 9110 states have call successors, (9110), 2826 states have call predecessors, (9110), 3158 states have return successors, (12705), 8478 states have call predecessors, (12705), 9105 states have call successors, (12705) [2022-12-14 11:13:36,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49589 states to 49589 states and 81907 transitions. [2022-12-14 11:13:36,226 INFO L78 Accepts]: Start accepts. Automaton has 49589 states and 81907 transitions. Word has length 185 [2022-12-14 11:13:36,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:13:36,227 INFO L495 AbstractCegarLoop]: Abstraction has 49589 states and 81907 transitions. [2022-12-14 11:13:36,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 1 states have call successors, (29) [2022-12-14 11:13:36,227 INFO L276 IsEmpty]: Start isEmpty. Operand 49589 states and 81907 transitions. [2022-12-14 11:13:36,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-12-14 11:13:36,234 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:13:36,234 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 8, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:13:36,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 11:13:36,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:13:36,435 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:13:36,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:13:36,436 INFO L85 PathProgramCache]: Analyzing trace with hash 807019124, now seen corresponding path program 1 times [2022-12-14 11:13:36,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:13:36,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476239079] [2022-12-14 11:13:36,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:13:36,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:13:36,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:13:36,791 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 12 proven. 87 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-12-14 11:13:36,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:13:36,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476239079] [2022-12-14 11:13:36,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476239079] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:13:36,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756577547] [2022-12-14 11:13:36,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:13:36,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:13:36,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:13:36,793 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:13:36,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 11:13:37,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:13:37,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 2965 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:13:37,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:13:37,421 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2022-12-14 11:13:37,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:13:37,768 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2022-12-14 11:13:37,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756577547] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:13:37,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1038206933] [2022-12-14 11:13:37,786 INFO L159 IcfgInterpreter]: Started Sifa with 149 locations of interest [2022-12-14 11:13:37,786 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:13:37,788 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:13:37,792 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:13:37,792 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:13:45,784 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 422 for LOIs [2022-12-14 11:13:45,849 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 598 for LOIs [2022-12-14 11:16:23,292 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 78 for LOIs [2022-12-14 11:16:24,060 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 199 for LOIs [2022-12-14 11:16:29,846 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 38 for LOIs [2022-12-14 11:16:29,872 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 43 for LOIs [2022-12-14 11:16:29,970 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 59 for LOIs [2022-12-14 11:16:29,980 INFO L197 IcfgInterpreter]: Interpreting procedure enterElevator with input of size 67 for LOIs [2022-12-14 11:16:30,163 INFO L197 IcfgInterpreter]: Interpreting procedure pressInLiftFloorButton with input of size 81 for LOIs [2022-12-14 11:16:30,187 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 26 for LOIs [2022-12-14 11:16:30,189 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 589 for LOIs [2022-12-14 11:16:33,754 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 593 for LOIs [2022-12-14 11:16:34,359 INFO L197 IcfgInterpreter]: Interpreting procedure isEmpty with input of size 32 for LOIs [2022-12-14 11:16:34,368 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 34 for LOIs [2022-12-14 11:16:34,371 INFO L197 IcfgInterpreter]: Interpreting procedure getWeight with input of size 53 for LOIs [2022-12-14 11:16:34,383 INFO L197 IcfgInterpreter]: Interpreting procedure getDestination with input of size 52 for LOIs [2022-12-14 11:16:34,394 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 521 for LOIs [2022-12-14 11:16:34,547 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull with input of size 39 for LOIs [2022-12-14 11:16:34,612 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 40 for LOIs [2022-12-14 11:16:34,620 INFO L197 IcfgInterpreter]: Interpreting procedure removePersonFromFloor with input of size 162 for LOIs [2022-12-14 11:16:35,593 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 72 for LOIs [2022-12-14 11:16:35,614 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:18:10,567 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1387315#(and (= (select (select |#memory_int| 23) 0) 32) (= (select |#length| 32) 30) (= 6 (select |#length| 18)) (= 116 (select (select |#memory_int| 7) 2)) (= (select |#valid| 30) 1) (= (select (select |#memory_int| 20) 1) 37) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= (select |#valid| 15) 1) (= ~executiveFloor~0 4) (= (select |#length| 21) 4) (= (select (select |#memory_int| 21) 1) 37) (<= 0 (+ ~currentFloorID~0 2147483648)) (= (select (select |#memory_int| 23) 1) 37) (= (select (select |#memory_int| 20) 3) 0) (= (select (select |#memory_int| 22) 3) 0) (= (select (select |#memory_int| 5) 3) 0) (= 4 (select |#length| 16)) (= 3 (select |#length| 10)) (= (select |#length| 37) 25) (= (select (select |#memory_int| 22) 0) 32) (= (select (select |#memory_int| 13) 3) 0) (= (select |#valid| 26) 1) (= (select |#length| 4) 10) (= 9 (select |#length| 30)) (= (select |#length| 8) 3) (= (select |#length| 6) 4) (= (select (select |#memory_int| 13) 1) 37) (= (select |#valid| 35) 1) (= (select |#valid| 9) 1) (= (select (select |#memory_int| 18) 5) 0) (= (select (select |#memory_int| 20) 0) 32) (= 25 (select |#length| 34)) (= (select (select |#memory_int| 6) 0) 91) (= (select |#valid| 11) 1) (= (select |#length| 9) 10) (= (select |#valid| 27) 1) (= 9 (select |#length| 36)) (= (select (select |#memory_int| 8) 0) 37) (= (select |#valid| 33) 1) (= 73 (select (select |#memory_int| 12) 1)) (= (select (select |#memory_int| 22) 1) 37) (<= ~currentFloorID~0 2147483647) (= (select (select |#memory_int| 23) 2) 105) (= (select (select |#memory_int| 10) 0) 117) (= (select (select |#memory_int| 19) 2) 105) (= 9 (select |#length| 25)) (= (select |#length| 15) 4) (= 31 (select |#length| 2)) (= (select (select |#memory_int| 19) 1) 37) (= ~head~0.offset 0) (= 7 (select |#length| 12)) (= (select (select |#memory_int| 22) 2) 105) (= 2 (select |#length| 1)) (= (select (select |#memory_int| 16) 2) 105) (= (select (select |#memory_int| 17) 2) 105) (= (select |#length| 19) 4) (= (select |#valid| 3) 1) (= (select |#valid| 7) 1) (= (select (select |#memory_int| 18) 4) 58) (= (select |#valid| 18) 1) (= 91 (select (select |#memory_int| 5) 0)) (= (select |#valid| 22) 1) (= 30 (select |#length| 26)) (= 70 (select (select |#memory_int| 18) 1)) (= 5 (select |#length| 7)) (= (select |#valid| 24) 1) (= (select (select |#memory_int| 19) 3) 0) (= 32 (select (select |#memory_int| 7) 0)) (= (select (select |#memory_int| 17) 3) 0) (= (select (select |#memory_int| 5) 1) 95) (= (select |#valid| 12) 1) (= (select |#valid| 32) 1) (= (select |#valid| 28) 1) (= (select |#length| 17) 4) (= (select |#valid| 37) 1) (= (select (select |#memory_int| 13) 2) 105) (= 112 (select (select |#memory_int| 12) 4)) (= (select |#valid| 4) 1) (= (select (select |#memory_int| 16) 1) 37) (= (select (select |#memory_int| 20) 2) 105) (= 112 (select (select |#memory_int| 10) 1)) (= (select (select |#memory_int| 8) 2) 0) (= (select (select |#memory_int| 21) 2) 105) (= 0 (select (select |#memory_int| 7) 4)) (= (select |#length| 13) 4) (= 5 (select |#length| 11)) (= (select (select |#memory_int| 17) 1) 37) (= (select (select |#memory_int| 6) 1) 93) (= (select |#valid| 1) 1) (= (select |#valid| 20) 1) (not (= 0 ~floorButtons_spc9_1~0)) (= (select |#length| 24) 2) (= ~doorState~0 1) (= (select (select |#memory_int| 12) 6) 0) (= 0 ~floorButtons_spc9_0~0) (= (select |#valid| 21) 1) (= (select (select |#memory_int| 11) 0) 100) (= (select (select |#memory_int| 24) 0) 10) (= 97 (select (select |#memory_int| 7) 1)) (= (select (select |#memory_int| 15) 1) 37) (= (select |#length| 5) 4) (= (select |#valid| 14) 1) (= 112 (select (select |#memory_int| 18) 3)) (= 119 (select (select |#memory_int| 11) 2)) (= (select |#valid| 0) 0) (= (select (select |#memory_int| 12) 5) 58) (= (select (select |#memory_int| 16) 0) 32) (= (select |#valid| 25) 1) (= ~head~0.base 0) (= (select (select |#memory_int| 14) 3) 0) (= (select (select |#memory_int| 23) 3) 0) (= 95 (select (select |#memory_int| 12) 3)) (= 105 (select (select |#memory_int| 14) 2)) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 14) 1) 37) (= |#NULL.offset| 0) (= (select |#valid| 36) 1) (= (select (select |#memory_int| 10) 2) 0) (= (select |#length| 33) 9) (= (select |#length| 27) 9) (= (select (select |#memory_int| 1) 0) 48) (= ~blocked~0 0) (= (select (select |#memory_int| 11) 1) 111) (= (select |#valid| 23) 1) (= 32 (select (select |#memory_int| 7) 3)) (= 30 (select |#length| 35)) (= 4 (select |#length| 23)) (= (select (select |#memory_int| 24) 1) 0) (= (select |#length| 20) 4) (= (select (select |#memory_int| 21) 3) 0) (= 76 (select (select |#memory_int| 12) 2)) (= (select |#valid| 19) 1) (= (select (select |#memory_int| 15) 0) 32) (= 32 (select (select |#memory_int| 13) 0)) (= (select |#valid| 31) 1) (= (select |#valid| 34) 1) (= (select (select |#memory_int| 6) 3) 0) (= (select |#valid| 16) 1) (= (select (select |#memory_int| 15) 2) 105) (= 32 (select (select |#memory_int| 17) 0)) (= 21 (select |#length| 31)) (= (select |#valid| 6) 1) (= (select (select |#memory_int| 15) 3) 0) (= (select (select |#memory_int| 1) 1) 0) (= (select (select |#memory_int| 5) 2) 93) (= (select |#length| 28) 21) (= (select (select |#memory_int| 14) 0) 32) (= (select |#valid| 29) 1) (= ~maximumWeight~0 100) (= (select (select |#memory_int| 6) 2) 32) (= 32 (select (select |#memory_int| 12) 0)) (= (select |#valid| 17) 1) (= (select (select |#memory_int| 16) 3) 0) (= (select |#valid| 10) 1) (= (select |#valid| 8) 1) (= (select (select |#memory_int| 11) 4) 0) (= 32 (select (select |#memory_int| 19) 0)) (= (select (select |#memory_int| 18) 2) 95) (= 4 (select |#length| 14)) (= 30 (select |#length| 29)) (= (select |#valid| 13) 1) (< 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (= (select |#length| 22) 4) (= |#NULL.base| 0) (= 32 (select (select |#memory_int| 18) 0)) (= (select (select |#memory_int| 8) 1) 105) (= (select (select |#memory_int| 11) 3) 110) (= 32 (select (select |#memory_int| 21) 0)))' at error location [2022-12-14 11:18:10,568 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:18:10,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:18:10,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 7] total 17 [2022-12-14 11:18:10,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322201940] [2022-12-14 11:18:10,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:18:10,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 11:18:10,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:18:10,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 11:18:10,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1243, Invalid=17117, Unknown=0, NotChecked=0, Total=18360 [2022-12-14 11:18:10,572 INFO L87 Difference]: Start difference. First operand 49589 states and 81907 transitions. Second operand has 17 states, 17 states have (on average 15.588235294117647) internal successors, (265), 17 states have internal predecessors, (265), 10 states have call successors, (80), 4 states have call predecessors, (80), 6 states have return successors, (79), 10 states have call predecessors, (79), 9 states have call successors, (79) [2022-12-14 11:18:19,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:18:19,864 INFO L93 Difference]: Finished difference Result 134434 states and 246048 transitions. [2022-12-14 11:18:19,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-14 11:18:19,865 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 15.588235294117647) internal successors, (265), 17 states have internal predecessors, (265), 10 states have call successors, (80), 4 states have call predecessors, (80), 6 states have return successors, (79), 10 states have call predecessors, (79), 9 states have call successors, (79) Word has length 308 [2022-12-14 11:18:19,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:18:20,261 INFO L225 Difference]: With dead ends: 134434 [2022-12-14 11:18:20,262 INFO L226 Difference]: Without dead ends: 84107 [2022-12-14 11:18:20,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 972 GetRequests, 791 SyntacticMatches, 21 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12354 ImplicationChecksByTransitivity, 95.9s TimeCoverageRelationStatistics Valid=1598, Invalid=24484, Unknown=0, NotChecked=0, Total=26082 [2022-12-14 11:18:20,450 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 2766 mSDsluCounter, 2608 mSDsCounter, 0 mSdLazyCounter, 8940 mSolverCounterSat, 1543 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2774 SdHoareTripleChecker+Valid, 2988 SdHoareTripleChecker+Invalid, 10483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1543 IncrementalHoareTripleChecker+Valid, 8940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:18:20,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2774 Valid, 2988 Invalid, 10483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1543 Valid, 8940 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-12-14 11:18:20,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84107 states. [2022-12-14 11:18:24,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84107 to 77073. [2022-12-14 11:18:24,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77073 states, 58171 states have (on average 1.5708170737996596) internal successors, (91376), 60612 states have internal predecessors, (91376), 13776 states have call successors, (13776), 4224 states have call predecessors, (13776), 5125 states have return successors, (24107), 12815 states have call predecessors, (24107), 13771 states have call successors, (24107) [2022-12-14 11:18:25,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77073 states to 77073 states and 129259 transitions. [2022-12-14 11:18:25,037 INFO L78 Accepts]: Start accepts. Automaton has 77073 states and 129259 transitions. Word has length 308 [2022-12-14 11:18:25,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:18:25,037 INFO L495 AbstractCegarLoop]: Abstraction has 77073 states and 129259 transitions. [2022-12-14 11:18:25,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 15.588235294117647) internal successors, (265), 17 states have internal predecessors, (265), 10 states have call successors, (80), 4 states have call predecessors, (80), 6 states have return successors, (79), 10 states have call predecessors, (79), 9 states have call successors, (79) [2022-12-14 11:18:25,038 INFO L276 IsEmpty]: Start isEmpty. Operand 77073 states and 129259 transitions. [2022-12-14 11:18:25,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-12-14 11:18:25,047 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:18:25,047 INFO L195 NwaCegarLoop]: trace histogram [7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:18:25,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 11:18:25,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-12-14 11:18:25,249 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:18:25,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:18:25,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1421870584, now seen corresponding path program 1 times [2022-12-14 11:18:25,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:18:25,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776295618] [2022-12-14 11:18:25,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:18:25,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:18:25,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:18:25,470 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-12-14 11:18:25,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:18:25,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776295618] [2022-12-14 11:18:25,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776295618] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:18:25,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:18:25,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:18:25,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762494535] [2022-12-14 11:18:25,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:18:25,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:18:25,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:18:25,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:18:25,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:18:25,472 INFO L87 Difference]: Start difference. First operand 77073 states and 129259 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2022-12-14 11:18:29,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:18:29,974 INFO L93 Difference]: Finished difference Result 160253 states and 275410 transitions. [2022-12-14 11:18:29,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:18:29,975 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 208 [2022-12-14 11:18:29,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:18:30,344 INFO L225 Difference]: With dead ends: 160253 [2022-12-14 11:18:30,344 INFO L226 Difference]: Without dead ends: 81659 [2022-12-14 11:18:30,525 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 11:18:30,526 INFO L413 NwaCegarLoop]: 523 mSDtfsCounter, 99 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1519 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:18:30,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 1519 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:18:30,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81659 states. [2022-12-14 11:18:34,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81659 to 81659. [2022-12-14 11:18:34,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81659 states, 62543 states have (on average 1.5049965623650927) internal successors, (94127), 65054 states have internal predecessors, (94127), 13776 states have call successors, (13776), 4368 states have call predecessors, (13776), 5339 states have return successors, (24107), 12815 states have call predecessors, (24107), 13771 states have call successors, (24107) [2022-12-14 11:18:34,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81659 states to 81659 states and 132010 transitions. [2022-12-14 11:18:34,569 INFO L78 Accepts]: Start accepts. Automaton has 81659 states and 132010 transitions. Word has length 208 [2022-12-14 11:18:34,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:18:34,570 INFO L495 AbstractCegarLoop]: Abstraction has 81659 states and 132010 transitions. [2022-12-14 11:18:34,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2022-12-14 11:18:34,570 INFO L276 IsEmpty]: Start isEmpty. Operand 81659 states and 132010 transitions. [2022-12-14 11:18:34,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-12-14 11:18:34,577 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:18:34,577 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:18:34,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-14 11:18:34,577 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:18:34,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:18:34,578 INFO L85 PathProgramCache]: Analyzing trace with hash -849469631, now seen corresponding path program 1 times [2022-12-14 11:18:34,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:18:34,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524976994] [2022-12-14 11:18:34,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:18:34,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:18:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:18:38,060 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 29 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-12-14 11:18:38,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:18:38,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524976994] [2022-12-14 11:18:38,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524976994] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:18:38,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329338713] [2022-12-14 11:18:38,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:18:38,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:18:38,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:18:38,062 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:18:38,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdd49769-8e3a-421b-8d3f-75d7a86455a4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 11:18:38,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:18:38,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 2232 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-14 11:18:38,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:18:39,227 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-12-14 11:18:39,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:18:41,359 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 11:18:48,050 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 11:18:48,386 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 11:18:55,384 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 11:18:55,498 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 49188 disjunctions. This might take some time... [2022-12-14 11:21:23,130 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 49188 disjunctions. [2022-12-14 11:21:23,517 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 11:21:29,286 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions.