./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product23.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71519cab-f581-46b1-94cd-961f564accd3/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71519cab-f581-46b1-94cd-961f564accd3/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71519cab-f581-46b1-94cd-961f564accd3/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71519cab-f581-46b1-94cd-961f564accd3/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product23.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71519cab-f581-46b1-94cd-961f564accd3/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71519cab-f581-46b1-94cd-961f564accd3/bin/utaipan-verify-SwPr7d2a91 --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 3c1ff6fd56cd2377d464f2b10cb9a0da8b8728fdfad0102577329687d925f1d9 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:04:03,763 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:04:03,857 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71519cab-f581-46b1-94cd-961f564accd3/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-25 00:04:03,861 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:04:03,862 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:04:03,914 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:04:03,915 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:04:03,916 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:04:03,917 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:04:03,922 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:04:03,923 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:04:03,924 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:04:03,925 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:04:03,926 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:04:03,927 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:04:03,927 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:04:03,927 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:04:03,928 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:04:03,928 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:04:03,929 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:04:03,929 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:04:03,930 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:04:03,931 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:04:03,931 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:04:03,932 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-25 00:04:03,932 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:04:03,932 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-25 00:04:03,933 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:04:03,933 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:04:03,934 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:04:03,935 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:04:03,935 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-25 00:04:03,935 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:04:03,936 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:04:03,936 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:04:03,936 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:04:03,936 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:04:03,936 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:04:03,937 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:04:03,937 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:04:03,938 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:04:03,938 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:04:03,938 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:04:03,938 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:04:03,939 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:04:03,939 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:04:03,939 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:04:03,940 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_71519cab-f581-46b1-94cd-961f564accd3/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71519cab-f581-46b1-94cd-961f564accd3/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c1ff6fd56cd2377d464f2b10cb9a0da8b8728fdfad0102577329687d925f1d9 [2023-11-25 00:04:04,239 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:04:04,273 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:04:04,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:04:04,279 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:04:04,279 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:04:04,281 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71519cab-f581-46b1-94cd-961f564accd3/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/product-lines/elevator_spec2_product23.cil.c [2023-11-25 00:04:07,404 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:04:07,802 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:04:07,803 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71519cab-f581-46b1-94cd-961f564accd3/sv-benchmarks/c/product-lines/elevator_spec2_product23.cil.c [2023-11-25 00:04:07,837 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71519cab-f581-46b1-94cd-961f564accd3/bin/utaipan-verify-SwPr7d2a91/data/e83afd3d6/b1473c831059492db28f0da88674ac2b/FLAG17c3db2eb [2023-11-25 00:04:07,854 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71519cab-f581-46b1-94cd-961f564accd3/bin/utaipan-verify-SwPr7d2a91/data/e83afd3d6/b1473c831059492db28f0da88674ac2b [2023-11-25 00:04:07,861 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:04:07,863 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:04:07,866 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:04:07,867 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:04:07,872 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:04:07,875 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:04:07" (1/1) ... [2023-11-25 00:04:07,876 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56d79da9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:07, skipping insertion in model container [2023-11-25 00:04:07,877 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:04:07" (1/1) ... [2023-11-25 00:04:07,968 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:04:08,442 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_71519cab-f581-46b1-94cd-961f564accd3/sv-benchmarks/c/product-lines/elevator_spec2_product23.cil.c[35995,36008] [2023-11-25 00:04:08,592 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:04:08,611 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:04:08,622 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification2_spec.i","") [48] [2023-11-25 00:04:08,624 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [235] [2023-11-25 00:04:08,624 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [273] [2023-11-25 00:04:08,624 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [941] [2023-11-25 00:04:08,625 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [1307] [2023-11-25 00:04:08,626 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [1665] [2023-11-25 00:04:08,626 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [1674] [2023-11-25 00:04:08,626 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [1766] [2023-11-25 00:04:08,626 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [1778] [2023-11-25 00:04:08,627 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1898] [2023-11-25 00:04:08,710 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_71519cab-f581-46b1-94cd-961f564accd3/sv-benchmarks/c/product-lines/elevator_spec2_product23.cil.c[35995,36008] [2023-11-25 00:04:08,790 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:04:08,829 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:04:08,829 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:08 WrapperNode [2023-11-25 00:04:08,829 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:04:08,831 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:04:08,831 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:04:08,831 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:04:08,839 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:08" (1/1) ... [2023-11-25 00:04:08,872 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:08" (1/1) ... [2023-11-25 00:04:08,936 INFO L138 Inliner]: procedures = 96, calls = 347, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 921 [2023-11-25 00:04:08,937 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:04:08,938 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:04:08,938 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:04:08,938 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:04:08,948 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:08" (1/1) ... [2023-11-25 00:04:08,948 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:08" (1/1) ... [2023-11-25 00:04:08,956 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:08" (1/1) ... [2023-11-25 00:04:08,956 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:08" (1/1) ... [2023-11-25 00:04:08,993 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:08" (1/1) ... [2023-11-25 00:04:09,026 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:08" (1/1) ... [2023-11-25 00:04:09,031 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:08" (1/1) ... [2023-11-25 00:04:09,038 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:08" (1/1) ... [2023-11-25 00:04:09,047 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:04:09,049 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:04:09,049 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:04:09,049 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:04:09,050 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:08" (1/1) ... [2023-11-25 00:04:09,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:04:09,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71519cab-f581-46b1-94cd-961f564accd3/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:04:09,083 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71519cab-f581-46b1-94cd-961f564accd3/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:04:09,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71519cab-f581-46b1-94cd-961f564accd3/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:04:09,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:04:09,140 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-25 00:04:09,140 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-25 00:04:09,140 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-25 00:04:09,140 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-25 00:04:09,141 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-25 00:04:09,142 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-25 00:04:09,142 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-25 00:04:09,142 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-25 00:04:09,142 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-11-25 00:04:09,143 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-11-25 00:04:09,143 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-25 00:04:09,144 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-25 00:04:09,145 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-25 00:04:09,145 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-25 00:04:09,145 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-25 00:04:09,148 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-25 00:04:09,148 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-25 00:04:09,149 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-25 00:04:09,149 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-11-25 00:04:09,149 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-11-25 00:04:09,149 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-25 00:04:09,149 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-25 00:04:09,149 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-25 00:04:09,150 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-25 00:04:09,151 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-25 00:04:09,151 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-25 00:04:09,151 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-25 00:04:09,151 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-25 00:04:09,151 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-25 00:04:09,152 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-25 00:04:09,152 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-25 00:04:09,152 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-25 00:04:09,152 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-25 00:04:09,152 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-25 00:04:09,152 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-25 00:04:09,153 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-25 00:04:09,153 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-25 00:04:09,153 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-25 00:04:09,153 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-25 00:04:09,153 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-25 00:04:09,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:04:09,153 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-25 00:04:09,154 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-25 00:04:09,154 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-25 00:04:09,154 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-25 00:04:09,155 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-25 00:04:09,155 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-25 00:04:09,155 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-25 00:04:09,156 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-25 00:04:09,157 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2023-11-25 00:04:09,157 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2023-11-25 00:04:09,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:04:09,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:04:09,158 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-25 00:04:09,158 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-25 00:04:09,376 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:04:09,381 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:04:10,784 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:04:11,804 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:04:11,804 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-25 00:04:11,806 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:04:11 BoogieIcfgContainer [2023-11-25 00:04:11,806 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:04:11,809 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:04:11,809 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:04:11,812 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:04:11,813 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:04:07" (1/3) ... [2023-11-25 00:04:11,814 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d486c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:04:11, skipping insertion in model container [2023-11-25 00:04:11,814 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:08" (2/3) ... [2023-11-25 00:04:11,814 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d486c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:04:11, skipping insertion in model container [2023-11-25 00:04:11,815 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:04:11" (3/3) ... [2023-11-25 00:04:11,816 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product23.cil.c [2023-11-25 00:04:11,856 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:04:11,856 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-25 00:04:11,918 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:04:11,924 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;@4fb2fe4d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:04:11,925 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-25 00:04:11,932 INFO L276 IsEmpty]: Start isEmpty. Operand has 397 states, 267 states have (on average 1.5767790262172285) internal successors, (421), 288 states have internal predecessors, (421), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 96 states have call predecessors, (102), 102 states have call successors, (102) [2023-11-25 00:04:11,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-25 00:04:11,957 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:11,958 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:04:11,959 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:11,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:11,964 INFO L85 PathProgramCache]: Analyzing trace with hash 952669355, now seen corresponding path program 1 times [2023-11-25 00:04:11,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:11,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70318796] [2023-11-25 00:04:11,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:11,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:12,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:12,496 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-25 00:04:12,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:12,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70318796] [2023-11-25 00:04:12,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70318796] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:12,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:12,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-25 00:04:12,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128931053] [2023-11-25 00:04:12,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:12,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-25 00:04:12,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:12,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-25 00:04:12,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-25 00:04:12,557 INFO L87 Difference]: Start difference. First operand has 397 states, 267 states have (on average 1.5767790262172285) internal successors, (421), 288 states have internal predecessors, (421), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 96 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-25 00:04:12,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:12,771 INFO L93 Difference]: Finished difference Result 415 states and 652 transitions. [2023-11-25 00:04:12,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-25 00:04:12,783 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 77 [2023-11-25 00:04:12,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:12,816 INFO L225 Difference]: With dead ends: 415 [2023-11-25 00:04:12,817 INFO L226 Difference]: Without dead ends: 393 [2023-11-25 00:04:12,821 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 [2023-11-25 00:04:12,827 INFO L413 NwaCegarLoop]: 580 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:12,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 580 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:04:12,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2023-11-25 00:04:12,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 393. [2023-11-25 00:04:12,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 265 states have (on average 1.5660377358490567) internal successors, (415), 284 states have internal predecessors, (415), 102 states have call successors, (102), 26 states have call predecessors, (102), 25 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2023-11-25 00:04:12,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 614 transitions. [2023-11-25 00:04:12,925 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 614 transitions. Word has length 77 [2023-11-25 00:04:12,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:12,926 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 614 transitions. [2023-11-25 00:04:12,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-25 00:04:12,927 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 614 transitions. [2023-11-25 00:04:12,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-25 00:04:12,933 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:12,934 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:04:12,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:04:12,934 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:12,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:12,935 INFO L85 PathProgramCache]: Analyzing trace with hash -695824435, now seen corresponding path program 1 times [2023-11-25 00:04:12,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:12,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676486833] [2023-11-25 00:04:12,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:12,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:12,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:13,532 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-25 00:04:13,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:13,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676486833] [2023-11-25 00:04:13,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676486833] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:13,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:13,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-25 00:04:13,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297906894] [2023-11-25 00:04:13,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:13,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-25 00:04:13,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:13,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-25 00:04:13,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:04:13,549 INFO L87 Difference]: Start difference. First operand 393 states and 614 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-25 00:04:16,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:16,338 INFO L93 Difference]: Finished difference Result 1210 states and 1921 transitions. [2023-11-25 00:04:16,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-25 00:04:16,339 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 78 [2023-11-25 00:04:16,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:16,351 INFO L225 Difference]: With dead ends: 1210 [2023-11-25 00:04:16,351 INFO L226 Difference]: Without dead ends: 833 [2023-11-25 00:04:16,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-25 00:04:16,358 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 1209 mSDsluCounter, 1229 mSDsCounter, 0 mSdLazyCounter, 2335 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1292 SdHoareTripleChecker+Valid, 1603 SdHoareTripleChecker+Invalid, 2783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 2335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:16,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1292 Valid, 1603 Invalid, 2783 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [448 Valid, 2335 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-25 00:04:16,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2023-11-25 00:04:16,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 784. [2023-11-25 00:04:16,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 537 states have (on average 1.5772811918063314) internal successors, (847), 570 states have internal predecessors, (847), 198 states have call successors, (198), 48 states have call predecessors, (198), 48 states have return successors, (199), 190 states have call predecessors, (199), 193 states have call successors, (199) [2023-11-25 00:04:16,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1244 transitions. [2023-11-25 00:04:16,474 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1244 transitions. Word has length 78 [2023-11-25 00:04:16,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:16,475 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 1244 transitions. [2023-11-25 00:04:16,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-25 00:04:16,475 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1244 transitions. [2023-11-25 00:04:16,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-25 00:04:16,480 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:16,481 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:04:16,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-25 00:04:16,481 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:16,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:16,482 INFO L85 PathProgramCache]: Analyzing trace with hash -182601224, now seen corresponding path program 1 times [2023-11-25 00:04:16,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:16,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795730231] [2023-11-25 00:04:16,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:16,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:16,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:16,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-25 00:04:16,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:16,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795730231] [2023-11-25 00:04:16,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795730231] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:16,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:16,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-25 00:04:16,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142717794] [2023-11-25 00:04:16,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:16,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:04:16,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:16,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:04:16,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:04:16,871 INFO L87 Difference]: Start difference. First operand 784 states and 1244 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 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) [2023-11-25 00:04:17,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:17,368 INFO L93 Difference]: Finished difference Result 855 states and 1356 transitions. [2023-11-25 00:04:17,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:04:17,369 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 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 [2023-11-25 00:04:17,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:17,381 INFO L225 Difference]: With dead ends: 855 [2023-11-25 00:04:17,381 INFO L226 Difference]: Without dead ends: 840 [2023-11-25 00:04:17,386 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 [2023-11-25 00:04:17,389 INFO L413 NwaCegarLoop]: 569 mSDtfsCounter, 707 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 1519 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:17,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [708 Valid, 1519 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-25 00:04:17,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2023-11-25 00:04:17,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 788. [2023-11-25 00:04:17,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 541 states have (on average 1.5730129390018484) internal successors, (851), 574 states have internal predecessors, (851), 198 states have call successors, (198), 48 states have call predecessors, (198), 48 states have return successors, (199), 190 states have call predecessors, (199), 193 states have call successors, (199) [2023-11-25 00:04:17,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1248 transitions. [2023-11-25 00:04:17,485 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1248 transitions. Word has length 82 [2023-11-25 00:04:17,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:17,486 INFO L495 AbstractCegarLoop]: Abstraction has 788 states and 1248 transitions. [2023-11-25 00:04:17,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 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) [2023-11-25 00:04:17,486 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1248 transitions. [2023-11-25 00:04:17,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-25 00:04:17,491 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:17,491 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:04:17,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-25 00:04:17,491 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:17,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:17,492 INFO L85 PathProgramCache]: Analyzing trace with hash 373687622, now seen corresponding path program 1 times [2023-11-25 00:04:17,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:17,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681230297] [2023-11-25 00:04:17,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:17,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:17,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:17,850 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-25 00:04:17,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:17,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681230297] [2023-11-25 00:04:17,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681230297] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:17,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:17,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-25 00:04:17,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823927205] [2023-11-25 00:04:17,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:17,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:04:17,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:17,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:04:17,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:04:17,853 INFO L87 Difference]: Start difference. First operand 788 states and 1248 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-25 00:04:18,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:18,063 INFO L93 Difference]: Finished difference Result 807 states and 1272 transitions. [2023-11-25 00:04:18,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-25 00:04:18,064 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) Word has length 87 [2023-11-25 00:04:18,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:18,072 INFO L225 Difference]: With dead ends: 807 [2023-11-25 00:04:18,072 INFO L226 Difference]: Without dead ends: 792 [2023-11-25 00:04:18,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:04:18,074 INFO L413 NwaCegarLoop]: 579 mSDtfsCounter, 41 mSDsluCounter, 2268 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 2847 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:18,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 2847 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:04:18,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2023-11-25 00:04:18,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 788. [2023-11-25 00:04:18,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 541 states have (on average 1.5693160813308689) internal successors, (849), 574 states have internal predecessors, (849), 198 states have call successors, (198), 48 states have call predecessors, (198), 48 states have return successors, (199), 190 states have call predecessors, (199), 193 states have call successors, (199) [2023-11-25 00:04:18,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1246 transitions. [2023-11-25 00:04:18,142 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1246 transitions. Word has length 87 [2023-11-25 00:04:18,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:18,142 INFO L495 AbstractCegarLoop]: Abstraction has 788 states and 1246 transitions. [2023-11-25 00:04:18,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-25 00:04:18,143 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1246 transitions. [2023-11-25 00:04:18,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-25 00:04:18,146 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:18,146 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:04:18,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-25 00:04:18,147 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:18,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:18,147 INFO L85 PathProgramCache]: Analyzing trace with hash -906723442, now seen corresponding path program 1 times [2023-11-25 00:04:18,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:18,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36140331] [2023-11-25 00:04:18,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:18,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:18,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:18,467 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-25 00:04:18,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:18,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36140331] [2023-11-25 00:04:18,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36140331] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:18,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:18,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:04:18,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493454661] [2023-11-25 00:04:18,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:18,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:04:18,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:18,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:04:18,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:04:18,471 INFO L87 Difference]: Start difference. First operand 788 states and 1246 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-25 00:04:20,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:20,204 INFO L93 Difference]: Finished difference Result 2521 states and 4055 transitions. [2023-11-25 00:04:20,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:04:20,205 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 94 [2023-11-25 00:04:20,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:20,221 INFO L225 Difference]: With dead ends: 2521 [2023-11-25 00:04:20,221 INFO L226 Difference]: Without dead ends: 1749 [2023-11-25 00:04:20,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:04:20,229 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 1219 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1297 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:20,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1297 Valid, 676 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-25 00:04:20,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1749 states. [2023-11-25 00:04:20,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1749 to 1583. [2023-11-25 00:04:20,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1109 states have (on average 1.5807033363390441) internal successors, (1753), 1172 states have internal predecessors, (1753), 381 states have call successors, (381), 87 states have call predecessors, (381), 92 states have return successors, (399), 359 states have call predecessors, (399), 376 states have call successors, (399) [2023-11-25 00:04:20,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 2533 transitions. [2023-11-25 00:04:20,416 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 2533 transitions. Word has length 94 [2023-11-25 00:04:20,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:20,417 INFO L495 AbstractCegarLoop]: Abstraction has 1583 states and 2533 transitions. [2023-11-25 00:04:20,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-25 00:04:20,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 2533 transitions. [2023-11-25 00:04:20,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-25 00:04:20,425 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:20,426 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:04:20,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-25 00:04:20,426 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:20,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:20,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1956194806, now seen corresponding path program 1 times [2023-11-25 00:04:20,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:20,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097898113] [2023-11-25 00:04:20,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:20,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:20,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-25 00:04:20,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:20,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097898113] [2023-11-25 00:04:20,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097898113] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:20,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:20,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:04:20,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620752797] [2023-11-25 00:04:20,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:20,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:04:20,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:20,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:04:20,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:04:20,710 INFO L87 Difference]: Start difference. First operand 1583 states and 2533 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-25 00:04:22,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:22,651 INFO L93 Difference]: Finished difference Result 4838 states and 7859 transitions. [2023-11-25 00:04:22,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:04:22,652 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 95 [2023-11-25 00:04:22,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:22,683 INFO L225 Difference]: With dead ends: 4838 [2023-11-25 00:04:22,683 INFO L226 Difference]: Without dead ends: 3274 [2023-11-25 00:04:22,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:04:22,696 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 1209 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1286 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 1300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:22,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1286 Valid, 684 Invalid, 1300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [386 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-25 00:04:22,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3274 states. [2023-11-25 00:04:22,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3274 to 3061. [2023-11-25 00:04:22,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3061 states, 2167 states have (on average 1.5874480849100139) internal successors, (3440), 2297 states have internal predecessors, (3440), 710 states have call successors, (710), 165 states have call predecessors, (710), 183 states have return successors, (788), 660 states have call predecessors, (788), 705 states have call successors, (788) [2023-11-25 00:04:23,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3061 states to 3061 states and 4938 transitions. [2023-11-25 00:04:23,039 INFO L78 Accepts]: Start accepts. Automaton has 3061 states and 4938 transitions. Word has length 95 [2023-11-25 00:04:23,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:23,040 INFO L495 AbstractCegarLoop]: Abstraction has 3061 states and 4938 transitions. [2023-11-25 00:04:23,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-25 00:04:23,041 INFO L276 IsEmpty]: Start isEmpty. Operand 3061 states and 4938 transitions. [2023-11-25 00:04:23,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-25 00:04:23,044 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:23,045 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:04:23,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-25 00:04:23,045 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:23,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:23,046 INFO L85 PathProgramCache]: Analyzing trace with hash 512351184, now seen corresponding path program 1 times [2023-11-25 00:04:23,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:23,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945511235] [2023-11-25 00:04:23,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:23,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:23,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:23,336 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-25 00:04:23,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:23,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945511235] [2023-11-25 00:04:23,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945511235] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:23,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:23,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:04:23,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505343553] [2023-11-25 00:04:23,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:23,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:04:23,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:23,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:04:23,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:04:23,340 INFO L87 Difference]: Start difference. First operand 3061 states and 4938 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-25 00:04:25,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:25,446 INFO L93 Difference]: Finished difference Result 9314 states and 15343 transitions. [2023-11-25 00:04:25,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:04:25,447 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 96 [2023-11-25 00:04:25,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:25,511 INFO L225 Difference]: With dead ends: 9314 [2023-11-25 00:04:25,511 INFO L226 Difference]: Without dead ends: 6278 [2023-11-25 00:04:25,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:04:25,537 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 1196 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1272 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:25,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1272 Valid, 697 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-25 00:04:25,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6278 states. [2023-11-25 00:04:26,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6278 to 5962. [2023-11-25 00:04:26,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5962 states, 4238 states have (on average 1.5875412930627655) internal successors, (6728), 4508 states have internal predecessors, (6728), 1352 states have call successors, (1352), 321 states have call predecessors, (1352), 371 states have return successors, (1642), 1246 states have call predecessors, (1642), 1347 states have call successors, (1642) [2023-11-25 00:04:26,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5962 states to 5962 states and 9722 transitions. [2023-11-25 00:04:26,283 INFO L78 Accepts]: Start accepts. Automaton has 5962 states and 9722 transitions. Word has length 96 [2023-11-25 00:04:26,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:26,284 INFO L495 AbstractCegarLoop]: Abstraction has 5962 states and 9722 transitions. [2023-11-25 00:04:26,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-25 00:04:26,284 INFO L276 IsEmpty]: Start isEmpty. Operand 5962 states and 9722 transitions. [2023-11-25 00:04:26,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-25 00:04:26,288 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:26,289 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:04:26,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-25 00:04:26,289 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:26,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:26,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1297124232, now seen corresponding path program 1 times [2023-11-25 00:04:26,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:26,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543112275] [2023-11-25 00:04:26,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:26,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:26,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:26,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-25 00:04:26,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:26,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543112275] [2023-11-25 00:04:26,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543112275] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:26,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:26,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:04:26,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570275927] [2023-11-25 00:04:26,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:26,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:04:26,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:26,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:04:26,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:04:26,522 INFO L87 Difference]: Start difference. First operand 5962 states and 9722 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-25 00:04:29,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:29,193 INFO L93 Difference]: Finished difference Result 18119 states and 30598 transitions. [2023-11-25 00:04:29,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:04:29,194 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 97 [2023-11-25 00:04:29,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:29,317 INFO L225 Difference]: With dead ends: 18119 [2023-11-25 00:04:29,317 INFO L226 Difference]: Without dead ends: 12194 [2023-11-25 00:04:29,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:04:29,367 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 1183 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 383 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1258 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 383 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:29,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1258 Valid, 707 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [383 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-25 00:04:29,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12194 states. [2023-11-25 00:04:30,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12194 to 11663. [2023-11-25 00:04:30,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11663 states, 8297 states have (on average 1.5841870555622515) internal successors, (13144), 8859 states have internal predecessors, (13144), 2606 states have call successors, (2606), 633 states have call predecessors, (2606), 759 states have return successors, (3648), 2388 states have call predecessors, (3648), 2601 states have call successors, (3648) [2023-11-25 00:04:30,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11663 states to 11663 states and 19398 transitions. [2023-11-25 00:04:30,717 INFO L78 Accepts]: Start accepts. Automaton has 11663 states and 19398 transitions. Word has length 97 [2023-11-25 00:04:30,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:30,717 INFO L495 AbstractCegarLoop]: Abstraction has 11663 states and 19398 transitions. [2023-11-25 00:04:30,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-25 00:04:30,718 INFO L276 IsEmpty]: Start isEmpty. Operand 11663 states and 19398 transitions. [2023-11-25 00:04:30,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-25 00:04:30,722 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:30,722 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:04:30,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-25 00:04:30,723 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:30,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:30,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1556283374, now seen corresponding path program 1 times [2023-11-25 00:04:30,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:30,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105901906] [2023-11-25 00:04:30,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:30,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:30,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:30,976 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-25 00:04:30,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:30,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105901906] [2023-11-25 00:04:30,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105901906] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:30,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:30,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:04:30,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144719891] [2023-11-25 00:04:30,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:30,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:04:30,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:30,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:04:30,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:04:30,982 INFO L87 Difference]: Start difference. First operand 11663 states and 19398 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-25 00:04:34,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:34,575 INFO L93 Difference]: Finished difference Result 35520 states and 62814 transitions. [2023-11-25 00:04:34,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:04:34,577 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 98 [2023-11-25 00:04:34,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:34,753 INFO L225 Difference]: With dead ends: 35520 [2023-11-25 00:04:34,753 INFO L226 Difference]: Without dead ends: 23908 [2023-11-25 00:04:34,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:04:34,824 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 1175 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1249 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:34,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1249 Valid, 722 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-25 00:04:34,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23908 states. [2023-11-25 00:04:37,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23908 to 22836. [2023-11-25 00:04:37,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22836 states, 16271 states have (on average 1.582631675987954) internal successors, (25751), 17395 states have internal predecessors, (25751), 5054 states have call successors, (5054), 1255 states have call predecessors, (5054), 1510 states have return successors, (8491), 4611 states have call predecessors, (8491), 5049 states have call successors, (8491) [2023-11-25 00:04:37,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22836 states to 22836 states and 39296 transitions. [2023-11-25 00:04:37,775 INFO L78 Accepts]: Start accepts. Automaton has 22836 states and 39296 transitions. Word has length 98 [2023-11-25 00:04:37,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:37,776 INFO L495 AbstractCegarLoop]: Abstraction has 22836 states and 39296 transitions. [2023-11-25 00:04:37,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-25 00:04:37,777 INFO L276 IsEmpty]: Start isEmpty. Operand 22836 states and 39296 transitions. [2023-11-25 00:04:37,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-11-25 00:04:37,790 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:37,790 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:04:37,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-25 00:04:37,791 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:37,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:37,792 INFO L85 PathProgramCache]: Analyzing trace with hash 655862426, now seen corresponding path program 1 times [2023-11-25 00:04:37,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:37,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923405713] [2023-11-25 00:04:37,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:37,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:37,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:38,195 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-25 00:04:38,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:38,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923405713] [2023-11-25 00:04:38,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923405713] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:38,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:38,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:04:38,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824971896] [2023-11-25 00:04:38,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:38,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:04:38,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:38,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:04:38,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:04:38,199 INFO L87 Difference]: Start difference. First operand 22836 states and 39296 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2023-11-25 00:04:40,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:40,430 INFO L93 Difference]: Finished difference Result 48931 states and 87571 transitions. [2023-11-25 00:04:40,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:04:40,430 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 146 [2023-11-25 00:04:40,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:40,580 INFO L225 Difference]: With dead ends: 48931 [2023-11-25 00:04:40,581 INFO L226 Difference]: Without dead ends: 26112 [2023-11-25 00:04:40,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:04:40,660 INFO L413 NwaCegarLoop]: 616 mSDtfsCounter, 130 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 1787 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:40,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 1787 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:04:40,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26112 states. [2023-11-25 00:04:43,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26112 to 23076. [2023-11-25 00:04:43,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23076 states, 16494 states have (on average 1.5776039772038317) internal successors, (26021), 17602 states have internal predecessors, (26021), 5071 states have call successors, (5071), 1255 states have call predecessors, (5071), 1510 states have return successors, (8508), 4628 states have call predecessors, (8508), 5066 states have call successors, (8508) [2023-11-25 00:04:43,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23076 states to 23076 states and 39600 transitions. [2023-11-25 00:04:43,505 INFO L78 Accepts]: Start accepts. Automaton has 23076 states and 39600 transitions. Word has length 146 [2023-11-25 00:04:43,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:43,505 INFO L495 AbstractCegarLoop]: Abstraction has 23076 states and 39600 transitions. [2023-11-25 00:04:43,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2023-11-25 00:04:43,506 INFO L276 IsEmpty]: Start isEmpty. Operand 23076 states and 39600 transitions. [2023-11-25 00:04:43,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-11-25 00:04:43,517 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:43,517 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:04:43,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-25 00:04:43,518 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:43,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:43,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1212802128, now seen corresponding path program 1 times [2023-11-25 00:04:43,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:43,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39063079] [2023-11-25 00:04:43,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:43,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:43,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:43,880 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-25 00:04:43,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:04:43,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39063079] [2023-11-25 00:04:43,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39063079] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:04:43,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543577517] [2023-11-25 00:04:43,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:43,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:04:43,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71519cab-f581-46b1-94cd-961f564accd3/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:04:43,887 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71519cab-f581-46b1-94cd-961f564accd3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:04:43,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71519cab-f581-46b1-94cd-961f564accd3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:04:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:44,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 1844 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-25 00:04:44,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:04:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-25 00:04:44,471 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:04:44,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543577517] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:44,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:04:44,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-11-25 00:04:44,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397750126] [2023-11-25 00:04:44,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:44,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:04:44,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:04:44,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:04:44,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:04:44,474 INFO L87 Difference]: Start difference. First operand 23076 states and 39600 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-11-25 00:04:47,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:47,197 INFO L93 Difference]: Finished difference Result 48631 states and 86786 transitions. [2023-11-25 00:04:47,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:04:47,199 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 153 [2023-11-25 00:04:47,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:47,367 INFO L225 Difference]: With dead ends: 48631 [2023-11-25 00:04:47,367 INFO L226 Difference]: Without dead ends: 25572 [2023-11-25 00:04:47,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-25 00:04:47,465 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 213 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:47,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1506 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-25 00:04:47,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25572 states.