./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product26.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_2ebce66c-b98f-4934-b495-30557f578b71/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ebce66c-b98f-4934-b495-30557f578b71/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_2ebce66c-b98f-4934-b495-30557f578b71/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ebce66c-b98f-4934-b495-30557f578b71/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ebce66c-b98f-4934-b495-30557f578b71/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_2ebce66c-b98f-4934-b495-30557f578b71/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 c39b0b488ad07619ca8d4ed9273747459006984c072c0894ad54004ae965569d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:49:40,841 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:49:40,926 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ebce66c-b98f-4934-b495-30557f578b71/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:49:40,932 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:49:40,932 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:49:40,963 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:49:40,964 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:49:40,964 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:49:40,965 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:49:40,966 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:49:40,966 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:49:40,967 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:49:40,968 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:49:40,969 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:49:40,969 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:49:40,970 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:49:40,970 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:49:40,971 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:49:40,972 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:49:40,972 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:49:40,973 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:49:40,979 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:49:40,980 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:49:40,981 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:49:40,982 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:49:40,982 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:49:40,983 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:49:40,983 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:49:40,984 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:49:40,984 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:49:40,986 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:49:40,986 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:49:40,987 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:49:40,987 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:49:40,987 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:49:40,988 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:49:40,988 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:49:40,988 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:49:40,989 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:49:40,989 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:49:40,989 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:49:40,990 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:49:40,990 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:49:40,990 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:49:40,991 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:49:40,991 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_2ebce66c-b98f-4934-b495-30557f578b71/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ebce66c-b98f-4934-b495-30557f578b71/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c39b0b488ad07619ca8d4ed9273747459006984c072c0894ad54004ae965569d [2023-11-19 04:49:41,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:49:41,397 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:49:41,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:49:41,402 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:49:41,403 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:49:41,405 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ebce66c-b98f-4934-b495-30557f578b71/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c [2023-11-19 04:49:44,812 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:49:45,254 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:49:45,255 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ebce66c-b98f-4934-b495-30557f578b71/sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c [2023-11-19 04:49:45,284 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ebce66c-b98f-4934-b495-30557f578b71/bin/utaipan-verify-t7M7D8N6sZ/data/a3e3a5def/17e54a91b7ec4e63910e245a9c33a6a5/FLAGacb9ed2e8 [2023-11-19 04:49:45,303 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ebce66c-b98f-4934-b495-30557f578b71/bin/utaipan-verify-t7M7D8N6sZ/data/a3e3a5def/17e54a91b7ec4e63910e245a9c33a6a5 [2023-11-19 04:49:45,306 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:49:45,307 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:49:45,309 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:49:45,309 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:49:45,314 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:49:45,315 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:49:45" (1/1) ... [2023-11-19 04:49:45,316 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37995d49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:45, skipping insertion in model container [2023-11-19 04:49:45,317 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:49:45" (1/1) ... [2023-11-19 04:49:45,400 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:49:46,127 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_2ebce66c-b98f-4934-b495-30557f578b71/sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c[70298,70311] [2023-11-19 04:49:46,142 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:49:46,159 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:49:46,170 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [48] [2023-11-19 04:49:46,172 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [412] [2023-11-19 04:49:46,172 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [1940] [2023-11-19 04:49:46,173 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [2058] [2023-11-19 04:49:46,173 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [2070] [2023-11-19 04:49:46,174 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [2436] [2023-11-19 04:49:46,175 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2471] [2023-11-19 04:49:46,175 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification2_spec.i","") [3132] [2023-11-19 04:49:46,175 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [3314] [2023-11-19 04:49:46,175 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [3323] [2023-11-19 04:49:46,312 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_2ebce66c-b98f-4934-b495-30557f578b71/sv-benchmarks/c/product-lines/elevator_spec2_product26.cil.c[70298,70311] [2023-11-19 04:49:46,316 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:49:46,361 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:49:46,362 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:46 WrapperNode [2023-11-19 04:49:46,362 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:49:46,363 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:49:46,364 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:49:46,364 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:49:46,371 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:46" (1/1) ... [2023-11-19 04:49:46,404 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:46" (1/1) ... [2023-11-19 04:49:46,459 INFO L138 Inliner]: procedures = 93, calls = 340, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 860 [2023-11-19 04:49:46,459 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:49:46,460 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:49:46,460 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:49:46,461 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:49:46,470 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:46" (1/1) ... [2023-11-19 04:49:46,471 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:46" (1/1) ... [2023-11-19 04:49:46,479 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:46" (1/1) ... [2023-11-19 04:49:46,479 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:46" (1/1) ... [2023-11-19 04:49:46,502 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:46" (1/1) ... [2023-11-19 04:49:46,518 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:46" (1/1) ... [2023-11-19 04:49:46,525 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:46" (1/1) ... [2023-11-19 04:49:46,532 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:46" (1/1) ... [2023-11-19 04:49:46,543 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:49:46,560 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:49:46,560 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:49:46,560 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:49:46,561 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:46" (1/1) ... [2023-11-19 04:49:46,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:49:46,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ebce66c-b98f-4934-b495-30557f578b71/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:49:46,595 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ebce66c-b98f-4934-b495-30557f578b71/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:49:46,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ebce66c-b98f-4934-b495-30557f578b71/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:49:46,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:49:46,636 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-19 04:49:46,637 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-19 04:49:46,637 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-19 04:49:46,637 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-19 04:49:46,637 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-19 04:49:46,637 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-19 04:49:46,638 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-19 04:49:46,639 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-19 04:49:46,639 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-19 04:49:46,639 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-19 04:49:46,639 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-19 04:49:46,640 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-19 04:49:46,640 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-19 04:49:46,641 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-19 04:49:46,643 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-11-19 04:49:46,643 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-11-19 04:49:46,643 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-19 04:49:46,646 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-19 04:49:46,646 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-19 04:49:46,646 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-19 04:49:46,646 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-19 04:49:46,646 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-19 04:49:46,647 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-19 04:49:46,647 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-19 04:49:46,648 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-19 04:49:46,648 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-19 04:49:46,648 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-19 04:49:46,648 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-19 04:49:46,648 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__empty [2023-11-19 04:49:46,649 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__empty [2023-11-19 04:49:46,649 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-19 04:49:46,650 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-19 04:49:46,650 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-19 04:49:46,650 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-19 04:49:46,650 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-19 04:49:46,650 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-19 04:49:46,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:49:46,651 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-19 04:49:46,651 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-19 04:49:46,651 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-19 04:49:46,651 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-19 04:49:46,651 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-19 04:49:46,652 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-19 04:49:46,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:49:46,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:49:46,652 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-19 04:49:46,652 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-19 04:49:46,846 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:49:46,850 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:49:48,190 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:49:49,246 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:49:49,246 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 04:49:49,263 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:49:49 BoogieIcfgContainer [2023-11-19 04:49:49,263 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:49:49,268 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:49:49,268 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:49:49,272 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:49:49,272 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:49:45" (1/3) ... [2023-11-19 04:49:49,273 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a30a6f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:49:49, skipping insertion in model container [2023-11-19 04:49:49,274 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:46" (2/3) ... [2023-11-19 04:49:49,275 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a30a6f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:49:49, skipping insertion in model container [2023-11-19 04:49:49,276 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:49:49" (3/3) ... [2023-11-19 04:49:49,277 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product26.cil.c [2023-11-19 04:49:49,299 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:49:49,299 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:49:49,382 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:49:49,393 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;@265aa55b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:49:49,394 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:49:49,404 INFO L276 IsEmpty]: Start isEmpty. Operand has 356 states, 241 states have (on average 1.6182572614107884) internal successors, (390), 264 states have internal predecessors, (390), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 84 states have call predecessors, (91), 91 states have call successors, (91) [2023-11-19 04:49:49,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-19 04:49:49,439 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:49,439 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] [2023-11-19 04:49:49,440 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:49:49,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:49,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1389027841, now seen corresponding path program 1 times [2023-11-19 04:49:49,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:49,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852508799] [2023-11-19 04:49:49,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:49,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:49,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:49,953 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 04:49:49,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:49,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852508799] [2023-11-19 04:49:49,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852508799] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:49:49,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:49:49,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:49:49,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531296200] [2023-11-19 04:49:49,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:49:49,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 04:49:49,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:49:50,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 04:49:50,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 04:49:50,023 INFO L87 Difference]: Start difference. First operand has 356 states, 241 states have (on average 1.6182572614107884) internal successors, (390), 264 states have internal predecessors, (390), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 84 states have call predecessors, (91), 91 states have call successors, (91) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-19 04:49:50,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:49:50,253 INFO L93 Difference]: Finished difference Result 374 states and 599 transitions. [2023-11-19 04:49:50,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 04:49:50,256 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2023-11-19 04:49:50,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:49:50,283 INFO L225 Difference]: With dead ends: 374 [2023-11-19 04:49:50,284 INFO L226 Difference]: Without dead ends: 352 [2023-11-19 04:49:50,288 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 04:49:50,292 INFO L413 NwaCegarLoop]: 530 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:49:50,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 530 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:49:50,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2023-11-19 04:49:50,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2023-11-19 04:49:50,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 239 states have (on average 1.606694560669456) internal successors, (384), 260 states have internal predecessors, (384), 91 states have call successors, (91), 22 states have call predecessors, (91), 21 states have return successors, (86), 83 states have call predecessors, (86), 86 states have call successors, (86) [2023-11-19 04:49:50,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 561 transitions. [2023-11-19 04:49:50,430 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 561 transitions. Word has length 39 [2023-11-19 04:49:50,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:49:50,432 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 561 transitions. [2023-11-19 04:49:50,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-19 04:49:50,434 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 561 transitions. [2023-11-19 04:49:50,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-19 04:49:50,441 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:50,442 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] [2023-11-19 04:49:50,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:49:50,443 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:49:50,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:50,444 INFO L85 PathProgramCache]: Analyzing trace with hash 823513458, now seen corresponding path program 1 times [2023-11-19 04:49:50,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:50,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721995261] [2023-11-19 04:49:50,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:50,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:50,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:51,137 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 04:49:51,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:51,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721995261] [2023-11-19 04:49:51,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721995261] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:49:51,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:49:51,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 04:49:51,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400446087] [2023-11-19 04:49:51,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:49:51,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:49:51,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:49:51,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:49:51,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:49:51,148 INFO L87 Difference]: Start difference. First operand 352 states and 561 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-19 04:49:53,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:49:53,451 INFO L93 Difference]: Finished difference Result 1156 states and 1884 transitions. [2023-11-19 04:49:53,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:49:53,452 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2023-11-19 04:49:53,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:49:53,464 INFO L225 Difference]: With dead ends: 1156 [2023-11-19 04:49:53,464 INFO L226 Difference]: Without dead ends: 820 [2023-11-19 04:49:53,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:49:53,483 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 1162 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 1336 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1222 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 1745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 1336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:49:53,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1222 Valid, 960 Invalid, 1745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 1336 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-19 04:49:53,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2023-11-19 04:49:53,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 733. [2023-11-19 04:49:53,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 521 states have (on average 1.6314779270633397) internal successors, (850), 551 states have internal predecessors, (850), 174 states have call successors, (174), 36 states have call predecessors, (174), 37 states have return successors, (176), 158 states have call predecessors, (176), 169 states have call successors, (176) [2023-11-19 04:49:53,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1200 transitions. [2023-11-19 04:49:53,602 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1200 transitions. Word has length 40 [2023-11-19 04:49:53,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:49:53,603 INFO L495 AbstractCegarLoop]: Abstraction has 733 states and 1200 transitions. [2023-11-19 04:49:53,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-19 04:49:53,604 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1200 transitions. [2023-11-19 04:49:53,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-19 04:49:53,610 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:53,610 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] [2023-11-19 04:49:53,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:49:53,611 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:49:53,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:53,621 INFO L85 PathProgramCache]: Analyzing trace with hash 671660633, now seen corresponding path program 1 times [2023-11-19 04:49:53,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:53,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897548564] [2023-11-19 04:49:53,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:53,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:53,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:54,163 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 04:49:54,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:54,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897548564] [2023-11-19 04:49:54,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897548564] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:49:54,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:49:54,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 04:49:54,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789276430] [2023-11-19 04:49:54,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:49:54,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 04:49:54,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:49:54,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 04:49:54,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:49:54,168 INFO L87 Difference]: Start difference. First operand 733 states and 1200 transitions. Second operand has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-19 04:49:57,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:49:57,503 INFO L93 Difference]: Finished difference Result 2515 states and 4164 transitions. [2023-11-19 04:49:57,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 04:49:57,504 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 61 [2023-11-19 04:49:57,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:49:57,525 INFO L225 Difference]: With dead ends: 2515 [2023-11-19 04:49:57,526 INFO L226 Difference]: Without dead ends: 1798 [2023-11-19 04:49:57,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2023-11-19 04:49:57,542 INFO L413 NwaCegarLoop]: 513 mSDtfsCounter, 1277 mSDsluCounter, 1505 mSDsCounter, 0 mSdLazyCounter, 3784 mSolverCounterSat, 596 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1345 SdHoareTripleChecker+Valid, 2018 SdHoareTripleChecker+Invalid, 4380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 596 IncrementalHoareTripleChecker+Valid, 3784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-19 04:49:57,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1345 Valid, 2018 Invalid, 4380 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [596 Valid, 3784 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-19 04:49:57,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2023-11-19 04:49:57,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1617. [2023-11-19 04:49:57,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1115 states have (on average 1.6080717488789238) internal successors, (1793), 1187 states have internal predecessors, (1793), 429 states have call successors, (429), 60 states have call predecessors, (429), 72 states have return successors, (448), 403 states have call predecessors, (448), 424 states have call successors, (448) [2023-11-19 04:49:57,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 2670 transitions. [2023-11-19 04:49:57,726 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 2670 transitions. Word has length 61 [2023-11-19 04:49:57,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:49:57,727 INFO L495 AbstractCegarLoop]: Abstraction has 1617 states and 2670 transitions. [2023-11-19 04:49:57,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-19 04:49:57,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 2670 transitions. [2023-11-19 04:49:57,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-19 04:49:57,731 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:57,732 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] [2023-11-19 04:49:57,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:49:57,732 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:49:57,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:57,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1202207761, now seen corresponding path program 1 times [2023-11-19 04:49:57,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:57,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860045801] [2023-11-19 04:49:57,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:57,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:57,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:58,201 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 04:49:58,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:58,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860045801] [2023-11-19 04:49:58,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860045801] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:49:58,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:49:58,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 04:49:58,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053329363] [2023-11-19 04:49:58,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:49:58,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:49:58,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:49:58,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:49:58,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:49:58,205 INFO L87 Difference]: Start difference. First operand 1617 states and 2670 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-19 04:50:00,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:00,785 INFO L93 Difference]: Finished difference Result 4522 states and 7484 transitions. [2023-11-19 04:50:00,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 04:50:00,786 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 62 [2023-11-19 04:50:00,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:00,817 INFO L225 Difference]: With dead ends: 4522 [2023-11-19 04:50:00,817 INFO L226 Difference]: Without dead ends: 2923 [2023-11-19 04:50:00,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2023-11-19 04:50:00,836 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 1637 mSDsluCounter, 1301 mSDsCounter, 0 mSdLazyCounter, 2262 mSolverCounterSat, 488 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1700 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 2750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 488 IncrementalHoareTripleChecker+Valid, 2262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:00,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1700 Valid, 1685 Invalid, 2750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [488 Valid, 2262 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-19 04:50:00,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2923 states. [2023-11-19 04:50:01,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2923 to 2785. [2023-11-19 04:50:01,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2785 states, 1992 states have (on average 1.6350401606425702) internal successors, (3257), 2095 states have internal predecessors, (3257), 657 states have call successors, (657), 111 states have call predecessors, (657), 135 states have return successors, (702), 623 states have call predecessors, (702), 652 states have call successors, (702) [2023-11-19 04:50:01,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2785 states to 2785 states and 4616 transitions. [2023-11-19 04:50:01,230 INFO L78 Accepts]: Start accepts. Automaton has 2785 states and 4616 transitions. Word has length 62 [2023-11-19 04:50:01,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:01,231 INFO L495 AbstractCegarLoop]: Abstraction has 2785 states and 4616 transitions. [2023-11-19 04:50:01,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-19 04:50:01,232 INFO L276 IsEmpty]: Start isEmpty. Operand 2785 states and 4616 transitions. [2023-11-19 04:50:01,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-19 04:50:01,236 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:01,236 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:50:01,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:50:01,237 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:01,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:01,238 INFO L85 PathProgramCache]: Analyzing trace with hash 536988671, now seen corresponding path program 1 times [2023-11-19 04:50:01,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:01,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994033511] [2023-11-19 04:50:01,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:01,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:01,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:01,494 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 04:50:01,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:01,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994033511] [2023-11-19 04:50:01,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994033511] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:01,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:01,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:50:01,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345075422] [2023-11-19 04:50:01,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:01,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:50:01,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:01,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:50:01,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:50:01,499 INFO L87 Difference]: Start difference. First operand 2785 states and 4616 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-19 04:50:01,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:01,942 INFO L93 Difference]: Finished difference Result 4934 states and 8192 transitions. [2023-11-19 04:50:01,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:50:01,943 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 66 [2023-11-19 04:50:01,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:01,971 INFO L225 Difference]: With dead ends: 4934 [2023-11-19 04:50:01,972 INFO L226 Difference]: Without dead ends: 2849 [2023-11-19 04:50:01,985 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 04:50:01,987 INFO L413 NwaCegarLoop]: 529 mSDtfsCounter, 7 mSDsluCounter, 1554 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2083 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:01,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2083 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:50:01,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2849 states. [2023-11-19 04:50:02,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2849 to 2825. [2023-11-19 04:50:02,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2825 states, 2022 states have (on average 1.6256181998021761) internal successors, (3287), 2125 states have internal predecessors, (3287), 657 states have call successors, (657), 111 states have call predecessors, (657), 145 states have return successors, (722), 633 states have call predecessors, (722), 652 states have call successors, (722) [2023-11-19 04:50:02,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 4666 transitions. [2023-11-19 04:50:02,262 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 4666 transitions. Word has length 66 [2023-11-19 04:50:02,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:02,263 INFO L495 AbstractCegarLoop]: Abstraction has 2825 states and 4666 transitions. [2023-11-19 04:50:02,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-19 04:50:02,264 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 4666 transitions. [2023-11-19 04:50:02,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-19 04:50:02,267 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:02,268 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:50:02,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 04:50:02,268 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:02,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:02,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1218707623, now seen corresponding path program 1 times [2023-11-19 04:50:02,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:02,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517014080] [2023-11-19 04:50:02,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:02,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:02,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:02,790 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 04:50:02,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:02,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517014080] [2023-11-19 04:50:02,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517014080] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:02,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:02,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 04:50:02,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900754638] [2023-11-19 04:50:02,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:02,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 04:50:02,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:02,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 04:50:02,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:50:02,794 INFO L87 Difference]: Start difference. First operand 2825 states and 4666 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 6 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2023-11-19 04:50:05,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:05,728 INFO L93 Difference]: Finished difference Result 7035 states and 11638 transitions. [2023-11-19 04:50:05,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 04:50:05,729 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 6 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) Word has length 70 [2023-11-19 04:50:05,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:05,781 INFO L225 Difference]: With dead ends: 7035 [2023-11-19 04:50:05,781 INFO L226 Difference]: Without dead ends: 4718 [2023-11-19 04:50:05,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-19 04:50:05,804 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 1960 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 1849 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2108 SdHoareTripleChecker+Valid, 1249 SdHoareTripleChecker+Invalid, 2620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 1849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:05,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2108 Valid, 1249 Invalid, 2620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 1849 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-19 04:50:05,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4718 states. [2023-11-19 04:50:06,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4718 to 4583. [2023-11-19 04:50:06,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4583 states, 3211 states have (on average 1.582684521955777) internal successors, (5082), 3392 states have internal predecessors, (5082), 1113 states have call successors, (1113), 198 states have call predecessors, (1113), 258 states have return successors, (1249), 1070 states have call predecessors, (1249), 1108 states have call successors, (1249) [2023-11-19 04:50:06,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4583 states to 4583 states and 7444 transitions. [2023-11-19 04:50:06,384 INFO L78 Accepts]: Start accepts. Automaton has 4583 states and 7444 transitions. Word has length 70 [2023-11-19 04:50:06,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:06,385 INFO L495 AbstractCegarLoop]: Abstraction has 4583 states and 7444 transitions. [2023-11-19 04:50:06,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 6 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2023-11-19 04:50:06,385 INFO L276 IsEmpty]: Start isEmpty. Operand 4583 states and 7444 transitions. [2023-11-19 04:50:06,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-19 04:50:06,388 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:06,389 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:50:06,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 04:50:06,389 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:06,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:06,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1860909680, now seen corresponding path program 1 times [2023-11-19 04:50:06,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:06,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566355185] [2023-11-19 04:50:06,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:06,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:06,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:06,955 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 04:50:06,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:06,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566355185] [2023-11-19 04:50:06,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566355185] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:06,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:06,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-19 04:50:06,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840819247] [2023-11-19 04:50:06,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:06,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 04:50:06,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:06,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 04:50:06,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-11-19 04:50:06,960 INFO L87 Difference]: Start difference. First operand 4583 states and 7444 transitions. Second operand has 11 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 6 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2023-11-19 04:50:12,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:12,324 INFO L93 Difference]: Finished difference Result 9416 states and 15530 transitions. [2023-11-19 04:50:12,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-19 04:50:12,325 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 6 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 73 [2023-11-19 04:50:12,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:12,371 INFO L225 Difference]: With dead ends: 9416 [2023-11-19 04:50:12,371 INFO L226 Difference]: Without dead ends: 4801 [2023-11-19 04:50:12,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2023-11-19 04:50:12,405 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 2041 mSDsluCounter, 2756 mSDsCounter, 0 mSdLazyCounter, 5068 mSolverCounterSat, 1100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2059 SdHoareTripleChecker+Valid, 3255 SdHoareTripleChecker+Invalid, 6168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1100 IncrementalHoareTripleChecker+Valid, 5068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:12,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2059 Valid, 3255 Invalid, 6168 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1100 Valid, 5068 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-11-19 04:50:12,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4801 states. [2023-11-19 04:50:12,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4801 to 4619. [2023-11-19 04:50:12,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4619 states, 3236 states have (on average 1.5454264524103831) internal successors, (5001), 3417 states have internal predecessors, (5001), 1118 states have call successors, (1118), 204 states have call predecessors, (1118), 264 states have return successors, (1254), 1074 states have call predecessors, (1254), 1113 states have call successors, (1254) [2023-11-19 04:50:13,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4619 states to 4619 states and 7373 transitions. [2023-11-19 04:50:13,044 INFO L78 Accepts]: Start accepts. Automaton has 4619 states and 7373 transitions. Word has length 73 [2023-11-19 04:50:13,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:13,045 INFO L495 AbstractCegarLoop]: Abstraction has 4619 states and 7373 transitions. [2023-11-19 04:50:13,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 6 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2023-11-19 04:50:13,046 INFO L276 IsEmpty]: Start isEmpty. Operand 4619 states and 7373 transitions. [2023-11-19 04:50:13,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-19 04:50:13,050 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:13,050 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:50:13,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 04:50:13,051 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:13,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:13,052 INFO L85 PathProgramCache]: Analyzing trace with hash 244947855, now seen corresponding path program 1 times [2023-11-19 04:50:13,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:13,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467774015] [2023-11-19 04:50:13,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:13,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:13,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:13,668 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 04:50:13,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:13,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467774015] [2023-11-19 04:50:13,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467774015] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:13,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:13,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 04:50:13,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563727244] [2023-11-19 04:50:13,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:13,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:50:13,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:13,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:50:13,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:50:13,673 INFO L87 Difference]: Start difference. First operand 4619 states and 7373 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-19 04:50:16,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:16,374 INFO L93 Difference]: Finished difference Result 9164 states and 14665 transitions. [2023-11-19 04:50:16,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 04:50:16,375 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) Word has length 75 [2023-11-19 04:50:16,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:16,440 INFO L225 Difference]: With dead ends: 9164 [2023-11-19 04:50:16,440 INFO L226 Difference]: Without dead ends: 5167 [2023-11-19 04:50:16,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-19 04:50:16,465 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 924 mSDsluCounter, 1208 mSDsCounter, 0 mSdLazyCounter, 2076 mSolverCounterSat, 371 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 1578 SdHoareTripleChecker+Invalid, 2447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 2076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:16,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [994 Valid, 1578 Invalid, 2447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [371 Valid, 2076 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-19 04:50:16,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5167 states. [2023-11-19 04:50:16,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5167 to 4709. [2023-11-19 04:50:16,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4709 states, 3296 states have (on average 1.539745145631068) internal successors, (5075), 3491 states have internal predecessors, (5075), 1120 states have call successors, (1120), 220 states have call predecessors, (1120), 292 states have return successors, (1292), 1074 states have call predecessors, (1292), 1115 states have call successors, (1292) [2023-11-19 04:50:17,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4709 states to 4709 states and 7487 transitions. [2023-11-19 04:50:17,020 INFO L78 Accepts]: Start accepts. Automaton has 4709 states and 7487 transitions. Word has length 75 [2023-11-19 04:50:17,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:17,021 INFO L495 AbstractCegarLoop]: Abstraction has 4709 states and 7487 transitions. [2023-11-19 04:50:17,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-19 04:50:17,021 INFO L276 IsEmpty]: Start isEmpty. Operand 4709 states and 7487 transitions. [2023-11-19 04:50:17,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-19 04:50:17,024 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:17,025 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:50:17,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 04:50:17,025 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:17,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:17,026 INFO L85 PathProgramCache]: Analyzing trace with hash -317172827, now seen corresponding path program 1 times [2023-11-19 04:50:17,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:17,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867328510] [2023-11-19 04:50:17,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:17,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:17,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:17,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 04:50:17,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:17,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867328510] [2023-11-19 04:50:17,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867328510] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:17,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:17,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 04:50:17,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442413015] [2023-11-19 04:50:17,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:17,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:50:17,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:17,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:50:17,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:50:17,428 INFO L87 Difference]: Start difference. First operand 4709 states and 7487 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-19 04:50:18,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:18,329 INFO L93 Difference]: Finished difference Result 4811 states and 7653 transitions. [2023-11-19 04:50:18,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:50:18,330 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 82 [2023-11-19 04:50:18,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:18,361 INFO L225 Difference]: With dead ends: 4811 [2023-11-19 04:50:18,361 INFO L226 Difference]: Without dead ends: 4796 [2023-11-19 04:50:18,364 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 04:50:18,367 INFO L413 NwaCegarLoop]: 509 mSDtfsCounter, 644 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 1361 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:18,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [645 Valid, 1361 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:50:18,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4796 states. [2023-11-19 04:50:18,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4796 to 4715. [2023-11-19 04:50:18,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4715 states, 3302 states have (on average 1.5387643852210782) internal successors, (5081), 3497 states have internal predecessors, (5081), 1120 states have call successors, (1120), 220 states have call predecessors, (1120), 292 states have return successors, (1292), 1074 states have call predecessors, (1292), 1115 states have call successors, (1292) [2023-11-19 04:50:18,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4715 states to 4715 states and 7493 transitions. [2023-11-19 04:50:18,863 INFO L78 Accepts]: Start accepts. Automaton has 4715 states and 7493 transitions. Word has length 82 [2023-11-19 04:50:18,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:18,864 INFO L495 AbstractCegarLoop]: Abstraction has 4715 states and 7493 transitions. [2023-11-19 04:50:18,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-19 04:50:18,864 INFO L276 IsEmpty]: Start isEmpty. Operand 4715 states and 7493 transitions. [2023-11-19 04:50:18,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-19 04:50:18,868 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:18,868 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:50:18,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 04:50:18,868 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:18,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:18,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1241690029, now seen corresponding path program 1 times [2023-11-19 04:50:18,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:18,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174434971] [2023-11-19 04:50:18,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:18,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:19,597 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 04:50:19,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:19,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174434971] [2023-11-19 04:50:19,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174434971] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:19,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:19,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-19 04:50:19,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737112763] [2023-11-19 04:50:19,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:19,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 04:50:19,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:19,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 04:50:19,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-11-19 04:50:19,603 INFO L87 Difference]: Start difference. First operand 4715 states and 7493 transitions. Second operand has 13 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 5 states have call successors, (15), 3 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14)