./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626aa36d-2b39-4e24-92f7-41c8753ee52e/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626aa36d-2b39-4e24-92f7-41c8753ee52e/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626aa36d-2b39-4e24-92f7-41c8753ee52e/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626aa36d-2b39-4e24-92f7-41c8753ee52e/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626aa36d-2b39-4e24-92f7-41c8753ee52e/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626aa36d-2b39-4e24-92f7-41c8753ee52e/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --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 8190dbbeca15ebdc96e247bb91a06680a00a60089c25180495df59d4a11849af --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:20:28,956 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:20:29,075 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626aa36d-2b39-4e24-92f7-41c8753ee52e/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:20:29,086 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:20:29,087 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:20:29,117 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:20:29,118 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:20:29,119 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:20:29,119 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:20:29,120 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:20:29,121 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:20:29,121 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:20:29,122 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:20:29,123 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:20:29,123 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:20:29,124 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:20:29,124 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:20:29,125 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:20:29,126 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:20:29,126 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:20:29,127 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:20:29,129 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:20:29,130 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:20:29,131 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:20:29,132 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:20:29,133 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:20:29,133 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:20:29,134 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:20:29,134 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:20:29,135 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:20:29,136 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:20:29,136 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:20:29,137 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:20:29,137 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:20:29,137 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:20:29,138 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:20:29,138 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:20:29,138 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:20:29,139 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:20:29,139 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:20:29,139 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:20:29,140 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:20:29,140 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:20:29,140 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:20:29,141 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:20:29,141 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_626aa36d-2b39-4e24-92f7-41c8753ee52e/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626aa36d-2b39-4e24-92f7-41c8753ee52e/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8190dbbeca15ebdc96e247bb91a06680a00a60089c25180495df59d4a11849af [2023-11-19 05:20:29,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:20:29,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:20:29,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:20:29,489 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:20:29,489 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:20:29,492 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626aa36d-2b39-4e24-92f7-41c8753ee52e/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c [2023-11-19 05:20:32,637 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:20:33,023 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:20:33,024 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626aa36d-2b39-4e24-92f7-41c8753ee52e/sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c [2023-11-19 05:20:33,058 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626aa36d-2b39-4e24-92f7-41c8753ee52e/bin/utaipan-verify-t7M7D8N6sZ/data/5a093e3b4/f291f7cab3004b52bf7570a64b8ac60f/FLAG13f31e505 [2023-11-19 05:20:33,079 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626aa36d-2b39-4e24-92f7-41c8753ee52e/bin/utaipan-verify-t7M7D8N6sZ/data/5a093e3b4/f291f7cab3004b52bf7570a64b8ac60f [2023-11-19 05:20:33,089 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:20:33,091 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:20:33,093 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:20:33,093 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:20:33,099 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:20:33,100 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:20:33" (1/1) ... [2023-11-19 05:20:33,101 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@408bb547 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:33, skipping insertion in model container [2023-11-19 05:20:33,102 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:20:33" (1/1) ... [2023-11-19 05:20:33,190 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:20:33,349 WARN L240 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_626aa36d-2b39-4e24-92f7-41c8753ee52e/sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c[1545,1558] [2023-11-19 05:20:33,787 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:20:33,802 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:20:33,814 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [48] [2023-11-19 05:20:33,816 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [57] [2023-11-19 05:20:33,817 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [178] [2023-11-19 05:20:33,817 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification2_spec.i","") [192] [2023-11-19 05:20:33,817 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [375] [2023-11-19 05:20:33,817 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [741] [2023-11-19 05:20:33,818 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1101] [2023-11-19 05:20:33,818 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [2529] [2023-11-19 05:20:33,818 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [2620] [2023-11-19 05:20:33,818 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2655] [2023-11-19 05:20:33,822 WARN L240 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_626aa36d-2b39-4e24-92f7-41c8753ee52e/sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c[1545,1558] [2023-11-19 05:20:33,940 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:20:33,973 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:20:33,973 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:33 WrapperNode [2023-11-19 05:20:33,973 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:20:33,975 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:20:33,975 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:20:33,975 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:20:33,984 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:33" (1/1) ... [2023-11-19 05:20:34,013 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:33" (1/1) ... [2023-11-19 05:20:34,074 INFO L138 Inliner]: procedures = 88, calls = 328, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 753 [2023-11-19 05:20:34,074 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:20:34,075 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:20:34,075 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:20:34,076 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:20:34,098 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:33" (1/1) ... [2023-11-19 05:20:34,098 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:33" (1/1) ... [2023-11-19 05:20:34,105 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:33" (1/1) ... [2023-11-19 05:20:34,105 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:33" (1/1) ... [2023-11-19 05:20:34,165 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:33" (1/1) ... [2023-11-19 05:20:34,198 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:33" (1/1) ... [2023-11-19 05:20:34,223 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:33" (1/1) ... [2023-11-19 05:20:34,229 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:33" (1/1) ... [2023-11-19 05:20:34,237 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:20:34,238 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:20:34,238 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:20:34,239 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:20:34,240 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:33" (1/1) ... [2023-11-19 05:20:34,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:20:34,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626aa36d-2b39-4e24-92f7-41c8753ee52e/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:20:34,278 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626aa36d-2b39-4e24-92f7-41c8753ee52e/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:20:34,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626aa36d-2b39-4e24-92f7-41c8753ee52e/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:20:34,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:20:34,365 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-19 05:20:34,365 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-19 05:20:34,365 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-19 05:20:34,366 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-19 05:20:34,366 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-19 05:20:34,366 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-19 05:20:34,367 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-19 05:20:34,368 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-19 05:20:34,368 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-19 05:20:34,368 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-19 05:20:34,368 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-19 05:20:34,369 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-19 05:20:34,369 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-11-19 05:20:34,371 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-11-19 05:20:34,371 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-19 05:20:34,371 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-19 05:20:34,371 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-19 05:20:34,374 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-19 05:20:34,375 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-19 05:20:34,375 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-19 05:20:34,375 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-19 05:20:34,375 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-19 05:20:34,376 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-19 05:20:34,377 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-19 05:20:34,377 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-19 05:20:34,377 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-19 05:20:34,377 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-19 05:20:34,377 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-19 05:20:34,377 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-19 05:20:34,378 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-19 05:20:34,378 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-19 05:20:34,378 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-19 05:20:34,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:20:34,378 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-19 05:20:34,378 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-19 05:20:34,379 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-19 05:20:34,379 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-19 05:20:34,379 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-19 05:20:34,379 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-19 05:20:34,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:20:34,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:20:34,380 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-19 05:20:34,380 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-19 05:20:34,554 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:20:34,557 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:20:35,746 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:20:36,750 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:20:36,751 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 05:20:36,766 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:20:36 BoogieIcfgContainer [2023-11-19 05:20:36,767 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:20:36,771 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:20:36,771 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:20:36,774 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:20:36,775 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:20:33" (1/3) ... [2023-11-19 05:20:36,776 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71cc0801 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:20:36, skipping insertion in model container [2023-11-19 05:20:36,776 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:33" (2/3) ... [2023-11-19 05:20:36,778 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71cc0801 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:20:36, skipping insertion in model container [2023-11-19 05:20:36,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:20:36" (3/3) ... [2023-11-19 05:20:36,779 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product01.cil.c [2023-11-19 05:20:36,799 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:20:36,800 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:20:36,882 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:20:36,890 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=LoopHeads, 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;@57c8ac86, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:20:36,890 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:20:36,899 INFO L276 IsEmpty]: Start isEmpty. Operand has 341 states, 233 states have (on average 1.6309012875536482) internal successors, (380), 254 states have internal predecessors, (380), 86 states have call successors, (86), 20 states have call predecessors, (86), 20 states have return successors, (86), 80 states have call predecessors, (86), 86 states have call successors, (86) [2023-11-19 05:20:36,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-19 05:20:36,933 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:20:36,934 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:20:36,934 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:20:36,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:20:36,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1577170790, now seen corresponding path program 1 times [2023-11-19 05:20:36,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:20:36,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891099399] [2023-11-19 05:20:36,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:20:36,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:20:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:20:37,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:20:37,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:20:37,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891099399] [2023-11-19 05:20:37,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891099399] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:20:37,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:20:37,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:20:37,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449015922] [2023-11-19 05:20:37,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:20:37,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 05:20:37,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:20:37,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 05:20:37,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 05:20:37,542 INFO L87 Difference]: Start difference. First operand has 341 states, 233 states have (on average 1.6309012875536482) internal successors, (380), 254 states have internal predecessors, (380), 86 states have call successors, (86), 20 states have call predecessors, (86), 20 states have return successors, (86), 80 states have call predecessors, (86), 86 states have call successors, (86) Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-11-19 05:20:37,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:20:37,761 INFO L93 Difference]: Finished difference Result 359 states and 579 transitions. [2023-11-19 05:20:37,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 05:20:37,764 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 51 [2023-11-19 05:20:37,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:20:37,789 INFO L225 Difference]: With dead ends: 359 [2023-11-19 05:20:37,789 INFO L226 Difference]: Without dead ends: 337 [2023-11-19 05:20:37,793 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 [2023-11-19 05:20:37,797 INFO L413 NwaCegarLoop]: 513 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:20:37,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 513 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:20:37,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2023-11-19 05:20:37,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 337. [2023-11-19 05:20:37,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 231 states have (on average 1.619047619047619) internal successors, (374), 250 states have internal predecessors, (374), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2023-11-19 05:20:37,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 541 transitions. [2023-11-19 05:20:37,895 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 541 transitions. Word has length 51 [2023-11-19 05:20:37,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:20:37,898 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 541 transitions. [2023-11-19 05:20:37,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-11-19 05:20:37,899 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 541 transitions. [2023-11-19 05:20:37,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-19 05:20:37,906 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:20:37,906 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:20:37,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:20:37,907 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:20:37,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:20:37,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1490508665, now seen corresponding path program 1 times [2023-11-19 05:20:37,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:20:37,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863038555] [2023-11-19 05:20:37,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:20:37,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:20:38,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:20:38,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:20:38,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:20:38,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863038555] [2023-11-19 05:20:38,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863038555] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:20:38,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:20:38,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 05:20:38,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79265279] [2023-11-19 05:20:38,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:20:38,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:20:38,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:20:38,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:20:38,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:20:38,479 INFO L87 Difference]: Start difference. First operand 337 states and 541 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-19 05:20:41,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:20:41,003 INFO L93 Difference]: Finished difference Result 1142 states and 1868 transitions. [2023-11-19 05:20:41,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 05:20:41,008 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2023-11-19 05:20:41,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:20:41,020 INFO L225 Difference]: With dead ends: 1142 [2023-11-19 05:20:41,020 INFO L226 Difference]: Without dead ends: 821 [2023-11-19 05:20:41,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2023-11-19 05:20:41,036 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 1614 mSDsluCounter, 1257 mSDsCounter, 0 mSdLazyCounter, 2198 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1675 SdHoareTripleChecker+Valid, 1629 SdHoareTripleChecker+Invalid, 2667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 2198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:20:41,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1675 Valid, 1629 Invalid, 2667 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [469 Valid, 2198 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-19 05:20:41,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2023-11-19 05:20:41,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 772. [2023-11-19 05:20:41,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 549 states have (on average 1.6466302367941712) internal successors, (904), 584 states have internal predecessors, (904), 181 states have call successors, (181), 39 states have call predecessors, (181), 41 states have return successors, (182), 173 states have call predecessors, (182), 176 states have call successors, (182) [2023-11-19 05:20:41,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 1267 transitions. [2023-11-19 05:20:41,163 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 1267 transitions. Word has length 52 [2023-11-19 05:20:41,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:20:41,164 INFO L495 AbstractCegarLoop]: Abstraction has 772 states and 1267 transitions. [2023-11-19 05:20:41,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-19 05:20:41,165 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 1267 transitions. [2023-11-19 05:20:41,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-19 05:20:41,168 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:20:41,169 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:20:41,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:20:41,169 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:20:41,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:20:41,170 INFO L85 PathProgramCache]: Analyzing trace with hash -595417163, now seen corresponding path program 1 times [2023-11-19 05:20:41,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:20:41,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106314564] [2023-11-19 05:20:41,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:20:41,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:20:41,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:20:41,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:20:41,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:20:41,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106314564] [2023-11-19 05:20:41,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106314564] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:20:41,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:20:41,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:20:41,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160131367] [2023-11-19 05:20:41,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:20:41,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:20:41,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:20:41,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:20:41,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:20:41,404 INFO L87 Difference]: Start difference. First operand 772 states and 1267 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-19 05:20:41,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:20:41,601 INFO L93 Difference]: Finished difference Result 1302 states and 2142 transitions. [2023-11-19 05:20:41,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:20:41,601 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2023-11-19 05:20:41,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:20:41,611 INFO L225 Difference]: With dead ends: 1302 [2023-11-19 05:20:41,611 INFO L226 Difference]: Without dead ends: 842 [2023-11-19 05:20:41,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:20:41,621 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 41 mSDsluCounter, 1590 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 2143 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:20:41,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 2143 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:20:41,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2023-11-19 05:20:41,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 784. [2023-11-19 05:20:41,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 558 states have (on average 1.636200716845878) internal successors, (913), 593 states have internal predecessors, (913), 181 states have call successors, (181), 39 states have call predecessors, (181), 44 states have return successors, (188), 176 states have call predecessors, (188), 176 states have call successors, (188) [2023-11-19 05:20:41,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1282 transitions. [2023-11-19 05:20:41,746 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1282 transitions. Word has length 56 [2023-11-19 05:20:41,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:20:41,747 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 1282 transitions. [2023-11-19 05:20:41,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-19 05:20:41,747 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1282 transitions. [2023-11-19 05:20:41,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-19 05:20:41,750 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:20:41,750 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:20:41,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:20:41,751 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:20:41,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:20:41,751 INFO L85 PathProgramCache]: Analyzing trace with hash -542839011, now seen corresponding path program 1 times [2023-11-19 05:20:41,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:20:41,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166551243] [2023-11-19 05:20:41,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:20:41,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:20:41,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:20:42,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:20:42,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:20:42,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166551243] [2023-11-19 05:20:42,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166551243] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:20:42,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:20:42,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 05:20:42,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742602989] [2023-11-19 05:20:42,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:20:42,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 05:20:42,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:20:42,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 05:20:42,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:20:42,146 INFO L87 Difference]: Start difference. First operand 784 states and 1282 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2023-11-19 05:20:44,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:20:44,597 INFO L93 Difference]: Finished difference Result 1791 states and 2921 transitions. [2023-11-19 05:20:44,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:20:44,598 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 60 [2023-11-19 05:20:44,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:20:44,609 INFO L225 Difference]: With dead ends: 1791 [2023-11-19 05:20:44,610 INFO L226 Difference]: Without dead ends: 1223 [2023-11-19 05:20:44,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:20:44,614 INFO L413 NwaCegarLoop]: 474 mSDtfsCounter, 3031 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 1738 mSolverCounterSat, 1296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3174 SdHoareTripleChecker+Valid, 1093 SdHoareTripleChecker+Invalid, 3034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1296 IncrementalHoareTripleChecker+Valid, 1738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:20:44,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3174 Valid, 1093 Invalid, 3034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1296 Valid, 1738 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-19 05:20:44,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2023-11-19 05:20:44,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 1129. [2023-11-19 05:20:44,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1129 states, 791 states have (on average 1.5903919089759797) internal successors, (1258), 843 states have internal predecessors, (1258), 267 states have call successors, (267), 62 states have call predecessors, (267), 70 states have return successors, (283), 260 states have call predecessors, (283), 262 states have call successors, (283) [2023-11-19 05:20:44,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 1808 transitions. [2023-11-19 05:20:44,723 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 1808 transitions. Word has length 60 [2023-11-19 05:20:44,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:20:44,724 INFO L495 AbstractCegarLoop]: Abstraction has 1129 states and 1808 transitions. [2023-11-19 05:20:44,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2023-11-19 05:20:44,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 1808 transitions. [2023-11-19 05:20:44,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-19 05:20:44,729 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:20:44,730 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:20:44,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:20:44,730 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:20:44,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:20:44,731 INFO L85 PathProgramCache]: Analyzing trace with hash -549731607, now seen corresponding path program 1 times [2023-11-19 05:20:44,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:20:44,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101052953] [2023-11-19 05:20:44,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:20:44,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:20:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:20:45,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:20:45,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:20:45,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101052953] [2023-11-19 05:20:45,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101052953] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:20:45,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:20:45,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:20:45,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255425432] [2023-11-19 05:20:45,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:20:45,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:20:45,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:20:45,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:20:45,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:20:45,071 INFO L87 Difference]: Start difference. First operand 1129 states and 1808 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 05:20:45,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:20:45,370 INFO L93 Difference]: Finished difference Result 2186 states and 3555 transitions. [2023-11-19 05:20:45,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:20:45,371 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 63 [2023-11-19 05:20:45,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:20:45,382 INFO L225 Difference]: With dead ends: 2186 [2023-11-19 05:20:45,383 INFO L226 Difference]: Without dead ends: 1129 [2023-11-19 05:20:45,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:20:45,399 INFO L413 NwaCegarLoop]: 536 mSDtfsCounter, 221 mSDsluCounter, 1368 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1904 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:20:45,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 1904 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:20:45,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2023-11-19 05:20:45,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 1129. [2023-11-19 05:20:45,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1129 states, 791 states have (on average 1.5499367888748419) internal successors, (1226), 843 states have internal predecessors, (1226), 267 states have call successors, (267), 62 states have call predecessors, (267), 70 states have return successors, (283), 260 states have call predecessors, (283), 262 states have call successors, (283) [2023-11-19 05:20:45,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 1776 transitions. [2023-11-19 05:20:45,493 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 1776 transitions. Word has length 63 [2023-11-19 05:20:45,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:20:45,493 INFO L495 AbstractCegarLoop]: Abstraction has 1129 states and 1776 transitions. [2023-11-19 05:20:45,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 05:20:45,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 1776 transitions. [2023-11-19 05:20:45,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-19 05:20:45,496 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:20:45,496 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:20:45,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 05:20:45,497 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:20:45,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:20:45,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1908622558, now seen corresponding path program 1 times [2023-11-19 05:20:45,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:20:45,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12950943] [2023-11-19 05:20:45,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:20:45,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:20:45,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:20:45,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:20:45,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:20:45,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12950943] [2023-11-19 05:20:45,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12950943] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:20:45,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:20:45,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 05:20:45,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338441258] [2023-11-19 05:20:45,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:20:45,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:20:45,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:20:45,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:20:45,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:20:45,853 INFO L87 Difference]: Start difference. First operand 1129 states and 1776 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 05:20:47,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:20:47,815 INFO L93 Difference]: Finished difference Result 2173 states and 3433 transitions. [2023-11-19 05:20:47,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 05:20:47,816 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 65 [2023-11-19 05:20:47,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:20:47,827 INFO L225 Difference]: With dead ends: 2173 [2023-11-19 05:20:47,828 INFO L226 Difference]: Without dead ends: 1317 [2023-11-19 05:20:47,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-19 05:20:47,832 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 905 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 1987 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 973 SdHoareTripleChecker+Valid, 1509 SdHoareTripleChecker+Invalid, 2345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 1987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-19 05:20:47,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [973 Valid, 1509 Invalid, 2345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 1987 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-19 05:20:47,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2023-11-19 05:20:47,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 1156. [2023-11-19 05:20:47,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 809 states have (on average 1.542645241038319) internal successors, (1248), 865 states have internal predecessors, (1248), 268 states have call successors, (268), 67 states have call predecessors, (268), 78 states have return successors, (294), 260 states have call predecessors, (294), 263 states have call successors, (294) [2023-11-19 05:20:47,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1810 transitions. [2023-11-19 05:20:47,928 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1810 transitions. Word has length 65 [2023-11-19 05:20:47,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:20:47,929 INFO L495 AbstractCegarLoop]: Abstraction has 1156 states and 1810 transitions. [2023-11-19 05:20:47,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 05:20:47,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1810 transitions. [2023-11-19 05:20:47,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-19 05:20:47,931 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:20:47,932 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:20:47,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 05:20:47,932 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:20:47,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:20:47,933 INFO L85 PathProgramCache]: Analyzing trace with hash -323846688, now seen corresponding path program 1 times [2023-11-19 05:20:47,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:20:47,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596511468] [2023-11-19 05:20:47,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:20:47,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:20:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:20:48,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 05:20:48,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:20:48,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596511468] [2023-11-19 05:20:48,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596511468] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:20:48,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:20:48,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:20:48,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637968048] [2023-11-19 05:20:48,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:20:48,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:20:48,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:20:48,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:20:48,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:20:48,191 INFO L87 Difference]: Start difference. First operand 1156 states and 1810 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-19 05:20:48,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:20:48,867 INFO L93 Difference]: Finished difference Result 1228 states and 1923 transitions. [2023-11-19 05:20:48,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:20:48,867 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 69 [2023-11-19 05:20:48,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:20:48,880 INFO L225 Difference]: With dead ends: 1228 [2023-11-19 05:20:48,880 INFO L226 Difference]: Without dead ends: 1213 [2023-11-19 05:20:48,881 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 [2023-11-19 05:20:48,882 INFO L413 NwaCegarLoop]: 492 mSDtfsCounter, 595 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 1649 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:20:48,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [596 Valid, 1649 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:20:48,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2023-11-19 05:20:48,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1160. [2023-11-19 05:20:48,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 813 states have (on average 1.5399753997539976) internal successors, (1252), 869 states have internal predecessors, (1252), 268 states have call successors, (268), 67 states have call predecessors, (268), 78 states have return successors, (294), 260 states have call predecessors, (294), 263 states have call successors, (294) [2023-11-19 05:20:48,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1814 transitions. [2023-11-19 05:20:48,988 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1814 transitions. Word has length 69 [2023-11-19 05:20:48,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:20:48,988 INFO L495 AbstractCegarLoop]: Abstraction has 1160 states and 1814 transitions. [2023-11-19 05:20:48,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-19 05:20:48,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1814 transitions. [2023-11-19 05:20:48,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-19 05:20:48,991 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:20:48,991 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:20:48,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 05:20:48,991 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:20:48,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:20:48,992 INFO L85 PathProgramCache]: Analyzing trace with hash 591857148, now seen corresponding path program 1 times [2023-11-19 05:20:48,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:20:48,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130232933] [2023-11-19 05:20:48,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:20:48,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:20:49,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:20:49,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 05:20:49,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:20:49,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130232933] [2023-11-19 05:20:49,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130232933] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:20:49,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:20:49,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:20:49,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039453182] [2023-11-19 05:20:49,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:20:49,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:20:49,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:20:49,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:20:49,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:20:49,251 INFO L87 Difference]: Start difference. First operand 1160 states and 1814 transitions. Second operand has 6 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-19 05:20:49,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:20:49,498 INFO L93 Difference]: Finished difference Result 1179 states and 1838 transitions. [2023-11-19 05:20:49,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:20:49,499 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) Word has length 74 [2023-11-19 05:20:49,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:20:49,508 INFO L225 Difference]: With dead ends: 1179 [2023-11-19 05:20:49,509 INFO L226 Difference]: Without dead ends: 1164 [2023-11-19 05:20:49,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:20:49,510 INFO L413 NwaCegarLoop]: 502 mSDtfsCounter, 41 mSDsluCounter, 1960 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 2462 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:20:49,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 2462 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:20:49,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2023-11-19 05:20:49,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1160. [2023-11-19 05:20:49,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 813 states have (on average 1.5362853628536286) internal successors, (1249), 869 states have internal predecessors, (1249), 268 states have call successors, (268), 67 states have call predecessors, (268), 78 states have return successors, (294), 260 states have call predecessors, (294), 263 states have call successors, (294) [2023-11-19 05:20:49,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1811 transitions. [2023-11-19 05:20:49,607 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1811 transitions. Word has length 74 [2023-11-19 05:20:49,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:20:49,607 INFO L495 AbstractCegarLoop]: Abstraction has 1160 states and 1811 transitions. [2023-11-19 05:20:49,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-19 05:20:49,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1811 transitions. [2023-11-19 05:20:49,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-19 05:20:49,610 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:20:49,610 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:20:49,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 05:20:49,610 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:20:49,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:20:49,611 INFO L85 PathProgramCache]: Analyzing trace with hash -339404258, now seen corresponding path program 1 times [2023-11-19 05:20:49,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:20:49,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377946374] [2023-11-19 05:20:49,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:20:49,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:20:49,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:20:49,854 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 05:20:49,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:20:49,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377946374] [2023-11-19 05:20:49,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377946374] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:20:49,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:20:49,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:20:49,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398601280] [2023-11-19 05:20:49,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:20:49,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:20:49,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:20:49,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:20:49,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:20:49,857 INFO L87 Difference]: Start difference. First operand 1160 states and 1811 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-19 05:20:51,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:20:51,521 INFO L93 Difference]: Finished difference Result 3735 states and 5935 transitions. [2023-11-19 05:20:51,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:20:51,523 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 81 [2023-11-19 05:20:51,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:20:51,548 INFO L225 Difference]: With dead ends: 3735 [2023-11-19 05:20:51,548 INFO L226 Difference]: Without dead ends: 2591 [2023-11-19 05:20:51,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:20:51,558 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 1065 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1129 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:20:51,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1129 Valid, 645 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-19 05:20:51,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2023-11-19 05:20:51,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 2344. [2023-11-19 05:20:51,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 1673 states have (on average 1.5457262402869096) internal successors, (2586), 1784 states have internal predecessors, (2586), 517 states have call successors, (517), 123 states have call predecessors, (517), 153 states have return successors, (594), 489 states have call predecessors, (594), 512 states have call successors, (594) [2023-11-19 05:20:51,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 3697 transitions. [2023-11-19 05:20:51,778 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 3697 transitions. Word has length 81 [2023-11-19 05:20:51,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:20:51,779 INFO L495 AbstractCegarLoop]: Abstraction has 2344 states and 3697 transitions. [2023-11-19 05:20:51,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-19 05:20:51,780 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 3697 transitions. [2023-11-19 05:20:51,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-19 05:20:51,783 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:20:51,783 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:20:51,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 05:20:51,783 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:20:51,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:20:51,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1932014002, now seen corresponding path program 1 times [2023-11-19 05:20:51,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:20:51,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659875996] [2023-11-19 05:20:51,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:20:51,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:20:51,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:20:52,096 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 05:20:52,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:20:52,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659875996] [2023-11-19 05:20:52,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659875996] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:20:52,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:20:52,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:20:52,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917062224] [2023-11-19 05:20:52,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:20:52,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:20:52,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:20:52,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:20:52,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:20:52,099 INFO L87 Difference]: Start difference. First operand 2344 states and 3697 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-19 05:20:53,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:20:53,856 INFO L93 Difference]: Finished difference Result 7195 states and 11541 transitions. [2023-11-19 05:20:53,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:20:53,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 82 [2023-11-19 05:20:53,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:20:53,898 INFO L225 Difference]: With dead ends: 7195 [2023-11-19 05:20:53,898 INFO L226 Difference]: Without dead ends: 4870 [2023-11-19 05:20:53,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:20:53,915 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 1052 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:20:53,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1115 Valid, 658 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-19 05:20:53,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4870 states. [2023-11-19 05:20:54,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4870 to 4554. [2023-11-19 05:20:54,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4554 states, 3280 states have (on average 1.5484756097560977) internal successors, (5079), 3513 states have internal predecessors, (5079), 964 states have call successors, (964), 235 states have call predecessors, (964), 309 states have return successors, (1190), 896 states have call predecessors, (1190), 959 states have call successors, (1190) [2023-11-19 05:20:54,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4554 states to 4554 states and 7233 transitions. [2023-11-19 05:20:54,409 INFO L78 Accepts]: Start accepts. Automaton has 4554 states and 7233 transitions. Word has length 82 [2023-11-19 05:20:54,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:20:54,409 INFO L495 AbstractCegarLoop]: Abstraction has 4554 states and 7233 transitions. [2023-11-19 05:20:54,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-19 05:20:54,410 INFO L276 IsEmpty]: Start isEmpty. Operand 4554 states and 7233 transitions. [2023-11-19 05:20:54,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-19 05:20:54,413 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:20:54,413 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:20:54,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 05:20:54,413 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:20:54,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:20:54,414 INFO L85 PathProgramCache]: Analyzing trace with hash -954657956, now seen corresponding path program 1 times [2023-11-19 05:20:54,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:20:54,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610137334] [2023-11-19 05:20:54,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:20:54,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:20:54,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:20:54,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 05:20:54,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:20:54,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610137334] [2023-11-19 05:20:54,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610137334] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:20:54,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:20:54,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:20:54,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757864289] [2023-11-19 05:20:54,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:20:54,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:20:54,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:20:54,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:20:54,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:20:54,713 INFO L87 Difference]: Start difference. First operand 4554 states and 7233 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-19 05:20:56,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:20:56,934 INFO L93 Difference]: Finished difference Result 13885 states and 22609 transitions. [2023-11-19 05:20:56,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:20:56,934 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 86 [2023-11-19 05:20:56,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:20:57,024 INFO L225 Difference]: With dead ends: 13885 [2023-11-19 05:20:57,024 INFO L226 Difference]: Without dead ends: 9356 [2023-11-19 05:20:57,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:20:57,051 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 1033 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1093 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:20:57,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1093 Valid, 671 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-19 05:20:57,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9356 states. [2023-11-19 05:20:57,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9356 to 8888. [2023-11-19 05:20:57,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8888 states, 6423 states have (on average 1.5453837770512222) internal successors, (9926), 6912 states have internal predecessors, (9926), 1831 states have call successors, (1831), 459 states have call predecessors, (1831), 633 states have return successors, (2517), 1683 states have call predecessors, (2517), 1826 states have call successors, (2517) [2023-11-19 05:20:58,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8888 states to 8888 states and 14274 transitions. [2023-11-19 05:20:58,012 INFO L78 Accepts]: Start accepts. Automaton has 8888 states and 14274 transitions. Word has length 86 [2023-11-19 05:20:58,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:20:58,013 INFO L495 AbstractCegarLoop]: Abstraction has 8888 states and 14274 transitions. [2023-11-19 05:20:58,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-19 05:20:58,013 INFO L276 IsEmpty]: Start isEmpty. Operand 8888 states and 14274 transitions. [2023-11-19 05:20:58,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-19 05:20:58,016 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:20:58,016 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:20:58,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 05:20:58,017 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:20:58,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:20:58,017 INFO L85 PathProgramCache]: Analyzing trace with hash 469965652, now seen corresponding path program 1 times [2023-11-19 05:20:58,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:20:58,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855150124] [2023-11-19 05:20:58,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:20:58,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:20:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:20:58,240 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 05:20:58,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:20:58,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855150124] [2023-11-19 05:20:58,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855150124] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:20:58,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:20:58,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:20:58,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734376527] [2023-11-19 05:20:58,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:20:58,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:20:58,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:20:58,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:20:58,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:20:58,243 INFO L87 Difference]: Start difference. First operand 8888 states and 14274 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-19 05:21:01,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:01,154 INFO L93 Difference]: Finished difference Result 27035 states and 45273 transitions. [2023-11-19 05:21:01,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:21:01,155 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 87 [2023-11-19 05:21:01,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:01,269 INFO L225 Difference]: With dead ends: 27035 [2023-11-19 05:21:01,269 INFO L226 Difference]: Without dead ends: 18184 [2023-11-19 05:21:01,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:21:01,324 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 1020 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1079 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:21:01,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1079 Valid, 681 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-19 05:21:01,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18184 states. [2023-11-19 05:21:03,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18184 to 17398. [2023-11-19 05:21:03,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17398 states, 12578 states have (on average 1.539274924471299) internal successors, (19361), 13603 states have internal predecessors, (19361), 3514 states have call successors, (3514), 907 states have call predecessors, (3514), 1305 states have return successors, (5684), 3206 states have call predecessors, (5684), 3509 states have call successors, (5684) [2023-11-19 05:21:03,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17398 states to 17398 states and 28559 transitions. [2023-11-19 05:21:03,799 INFO L78 Accepts]: Start accepts. Automaton has 17398 states and 28559 transitions. Word has length 87 [2023-11-19 05:21:03,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:21:03,799 INFO L495 AbstractCegarLoop]: Abstraction has 17398 states and 28559 transitions. [2023-11-19 05:21:03,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-19 05:21:03,801 INFO L276 IsEmpty]: Start isEmpty. Operand 17398 states and 28559 transitions. [2023-11-19 05:21:03,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-19 05:21:03,804 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:03,805 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:21:03,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 05:21:03,805 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:21:03,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:03,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1683628446, now seen corresponding path program 1 times [2023-11-19 05:21:03,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:03,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229524504] [2023-11-19 05:21:03,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:03,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:03,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:04,079 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 05:21:04,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:04,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229524504] [2023-11-19 05:21:04,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229524504] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:21:04,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:21:04,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:21:04,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623588058] [2023-11-19 05:21:04,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:21:04,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:21:04,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:21:04,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:21:04,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:21:04,083 INFO L87 Difference]: Start difference. First operand 17398 states and 28559 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-19 05:21:08,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:21:08,319 INFO L93 Difference]: Finished difference Result 53027 states and 93549 transitions. [2023-11-19 05:21:08,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:21:08,321 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 88 [2023-11-19 05:21:08,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:21:08,619 INFO L225 Difference]: With dead ends: 53027 [2023-11-19 05:21:08,619 INFO L226 Difference]: Without dead ends: 35680 [2023-11-19 05:21:08,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:21:08,705 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 1012 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1070 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:21:08,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1070 Valid, 696 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-19 05:21:08,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35680 states. [2023-11-19 05:21:12,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35680 to 34044. [2023-11-19 05:21:12,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34044 states, 24665 states have (on average 1.5361037907966755) internal successors, (37888), 26717 states have internal predecessors, (37888), 6778 states have call successors, (6778), 1800 states have call predecessors, (6778), 2600 states have return successors, (13307), 6149 states have call predecessors, (13307), 6773 states have call successors, (13307) [2023-11-19 05:21:13,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34044 states to 34044 states and 57973 transitions. [2023-11-19 05:21:13,198 INFO L78 Accepts]: Start accepts. Automaton has 34044 states and 57973 transitions. Word has length 88 [2023-11-19 05:21:13,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:21:13,198 INFO L495 AbstractCegarLoop]: Abstraction has 34044 states and 57973 transitions. [2023-11-19 05:21:13,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-19 05:21:13,199 INFO L276 IsEmpty]: Start isEmpty. Operand 34044 states and 57973 transitions. [2023-11-19 05:21:13,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-19 05:21:13,212 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:21:13,213 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:21:13,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 05:21:13,214 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:21:13,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:21:13,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1590556234, now seen corresponding path program 1 times [2023-11-19 05:21:13,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:21:13,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937526637] [2023-11-19 05:21:13,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:13,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:21:13,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:21:13,860 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-11-19 05:21:13,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:21:13,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937526637] [2023-11-19 05:21:13,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937526637] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:21:13,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308752059] [2023-11-19 05:21:13,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:21:13,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:21:13,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626aa36d-2b39-4e24-92f7-41c8753ee52e/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:21:13,868 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626aa36d-2b39-4e24-92f7-41c8753ee52e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:21:13,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626aa36d-2b39-4e24-92f7-41c8753ee52e/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process