./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_176c873e-6196-4f92-81d3-cee41335bfe8/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_176c873e-6196-4f92-81d3-cee41335bfe8/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_176c873e-6196-4f92-81d3-cee41335bfe8/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_176c873e-6196-4f92-81d3-cee41335bfe8/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_176c873e-6196-4f92-81d3-cee41335bfe8/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_176c873e-6196-4f92-81d3-cee41335bfe8/bin/utaipan-verify-mE87zJ7Ire --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 a24bdc0807d94f83606acfe112db107808ae7409e0ad1ecc1d01e9704d0b4ece --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:10:52,690 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:10:52,772 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_176c873e-6196-4f92-81d3-cee41335bfe8/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:10:52,779 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:10:52,779 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:10:52,811 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:10:52,812 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:10:52,812 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:10:52,813 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:10:52,814 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:10:52,815 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:10:52,816 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:10:52,816 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:10:52,817 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:10:52,818 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:10:52,818 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:10:52,819 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:10:52,819 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:10:52,820 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:10:52,821 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:10:52,822 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:10:52,829 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:10:52,830 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:10:52,831 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:10:52,831 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:10:52,832 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:10:52,833 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:10:52,833 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:10:52,834 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:10:52,834 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:10:52,836 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:10:52,837 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:10:52,837 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:10:52,837 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:10:52,838 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:10:52,838 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:10:52,838 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:10:52,839 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:10:52,840 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:10:52,840 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:10:52,841 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:10:52,841 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:10:52,842 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:10:52,842 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:10:52,843 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:10:52,843 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:10:52,843 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:10:52,844 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_176c873e-6196-4f92-81d3-cee41335bfe8/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_176c873e-6196-4f92-81d3-cee41335bfe8/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a24bdc0807d94f83606acfe112db107808ae7409e0ad1ecc1d01e9704d0b4ece [2023-11-23 21:10:53,143 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:10:53,172 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:10:53,178 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:10:53,181 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:10:53,182 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:10:53,183 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_176c873e-6196-4f92-81d3-cee41335bfe8/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c [2023-11-23 21:10:56,464 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:10:56,808 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:10:56,809 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_176c873e-6196-4f92-81d3-cee41335bfe8/sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c [2023-11-23 21:10:56,834 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_176c873e-6196-4f92-81d3-cee41335bfe8/bin/utaipan-verify-mE87zJ7Ire/data/a7abef19a/61d58bc1bb37434db846551e4592660b/FLAGf9c23c557 [2023-11-23 21:10:56,846 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_176c873e-6196-4f92-81d3-cee41335bfe8/bin/utaipan-verify-mE87zJ7Ire/data/a7abef19a/61d58bc1bb37434db846551e4592660b [2023-11-23 21:10:56,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:10:56,851 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:10:56,853 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:10:56,853 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:10:56,863 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:10:56,863 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:10:56" (1/1) ... [2023-11-23 21:10:56,864 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69533056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:56, skipping insertion in model container [2023-11-23 21:10:56,864 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:10:56" (1/1) ... [2023-11-23 21:10:56,985 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:10:57,187 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_176c873e-6196-4f92-81d3-cee41335bfe8/sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c[1545,1558] [2023-11-23 21:10:57,717 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:10:57,734 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:10:57,748 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [48] [2023-11-23 21:10:57,750 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [57] [2023-11-23 21:10:57,750 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [1490] [2023-11-23 21:10:57,751 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [1849] [2023-11-23 21:10:57,751 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [2515] [2023-11-23 21:10:57,751 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [2881] [2023-11-23 21:10:57,752 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [2894] [2023-11-23 21:10:57,752 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [2985] [2023-11-23 21:10:57,752 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [3104] [2023-11-23 21:10:57,752 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification1_spec.i","") [3139] [2023-11-23 21:10:57,756 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_176c873e-6196-4f92-81d3-cee41335bfe8/sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c[1545,1558] [2023-11-23 21:10:57,915 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:10:57,964 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:10:57,964 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:57 WrapperNode [2023-11-23 21:10:57,965 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:10:57,966 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:10:57,967 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:10:57,967 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:10:57,978 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:57" (1/1) ... [2023-11-23 21:10:58,033 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:57" (1/1) ... [2023-11-23 21:10:58,104 INFO L138 Inliner]: procedures = 88, calls = 329, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 742 [2023-11-23 21:10:58,105 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:10:58,106 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:10:58,106 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:10:58,106 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:10:58,119 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:57" (1/1) ... [2023-11-23 21:10:58,120 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:57" (1/1) ... [2023-11-23 21:10:58,129 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:57" (1/1) ... [2023-11-23 21:10:58,130 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:57" (1/1) ... [2023-11-23 21:10:58,159 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:57" (1/1) ... [2023-11-23 21:10:58,176 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:57" (1/1) ... [2023-11-23 21:10:58,183 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:57" (1/1) ... [2023-11-23 21:10:58,191 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:57" (1/1) ... [2023-11-23 21:10:58,202 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:10:58,203 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:10:58,203 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:10:58,204 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:10:58,205 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:57" (1/1) ... [2023-11-23 21:10:58,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:10:58,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_176c873e-6196-4f92-81d3-cee41335bfe8/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:10:58,259 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_176c873e-6196-4f92-81d3-cee41335bfe8/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:10:58,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_176c873e-6196-4f92-81d3-cee41335bfe8/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:10:58,338 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-11-23 21:10:58,339 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-11-23 21:10:58,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:10:58,339 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-23 21:10:58,339 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-23 21:10:58,341 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-23 21:10:58,341 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-23 21:10:58,342 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-23 21:10:58,342 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-23 21:10:58,342 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-23 21:10:58,342 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-23 21:10:58,343 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-23 21:10:58,345 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-23 21:10:58,345 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-23 21:10:58,345 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-23 21:10:58,346 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-11-23 21:10:58,349 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-11-23 21:10:58,350 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-23 21:10:58,350 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-23 21:10:58,350 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-23 21:10:58,350 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-23 21:10:58,350 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-23 21:10:58,351 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-23 21:10:58,351 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-23 21:10:58,351 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-23 21:10:58,352 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-23 21:10:58,353 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-23 21:10:58,353 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-23 21:10:58,353 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-23 21:10:58,353 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-23 21:10:58,359 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-23 21:10:58,359 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-23 21:10:58,363 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-23 21:10:58,364 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-23 21:10:58,364 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-23 21:10:58,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:10:58,364 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-23 21:10:58,364 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-23 21:10:58,365 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-23 21:10:58,365 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-23 21:10:58,365 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-23 21:10:58,365 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-23 21:10:58,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:10:58,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:10:58,391 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-23 21:10:58,392 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-23 21:10:58,658 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:10:58,661 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:11:00,105 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:11:01,071 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:11:01,071 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:11:01,073 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:11:01 BoogieIcfgContainer [2023-11-23 21:11:01,073 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:11:01,076 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:11:01,076 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:11:01,079 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:11:01,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:10:56" (1/3) ... [2023-11-23 21:11:01,081 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2024755a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:11:01, skipping insertion in model container [2023-11-23 21:11:01,081 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:57" (2/3) ... [2023-11-23 21:11:01,081 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2024755a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:11:01, skipping insertion in model container [2023-11-23 21:11:01,081 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:11:01" (3/3) ... [2023-11-23 21:11:01,083 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product01.cil.c [2023-11-23 21:11:01,102 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:11:01,103 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:11:01,162 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:11:01,170 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;@20939196, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:11:01,170 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:11:01,177 INFO L276 IsEmpty]: Start isEmpty. Operand has 348 states, 236 states have (on average 1.6228813559322033) internal successors, (383), 257 states have internal predecessors, (383), 89 states have call successors, (89), 21 states have call predecessors, (89), 21 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) [2023-11-23 21:11:01,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-23 21:11:01,198 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:01,198 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:01,199 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:11:01,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:01,204 INFO L85 PathProgramCache]: Analyzing trace with hash 167879830, now seen corresponding path program 1 times [2023-11-23 21:11:01,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:01,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331185227] [2023-11-23 21:11:01,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:01,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:01,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:02,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:11:02,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:02,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331185227] [2023-11-23 21:11:02,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331185227] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:02,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:11:02,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:11:02,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146353286] [2023-11-23 21:11:02,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:02,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:11:02,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:02,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:11:02,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:11:02,428 INFO L87 Difference]: Start difference. First operand has 348 states, 236 states have (on average 1.6228813559322033) internal successors, (383), 257 states have internal predecessors, (383), 89 states have call successors, (89), 21 states have call predecessors, (89), 21 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-23 21:11:06,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:06,196 INFO L93 Difference]: Finished difference Result 1159 states and 1908 transitions. [2023-11-23 21:11:06,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 21:11:06,199 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 62 [2023-11-23 21:11:06,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:06,227 INFO L225 Difference]: With dead ends: 1159 [2023-11-23 21:11:06,227 INFO L226 Difference]: Without dead ends: 828 [2023-11-23 21:11:06,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2023-11-23 21:11:06,240 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 1625 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 2249 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1686 SdHoareTripleChecker+Valid, 1648 SdHoareTripleChecker+Invalid, 2728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 2249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:06,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1686 Valid, 1648 Invalid, 2728 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [479 Valid, 2249 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-11-23 21:11:06,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2023-11-23 21:11:06,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 779. [2023-11-23 21:11:06,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 552 states have (on average 1.6431159420289856) internal successors, (907), 587 states have internal predecessors, (907), 184 states have call successors, (184), 40 states have call predecessors, (184), 42 states have return successors, (185), 176 states have call predecessors, (185), 179 states have call successors, (185) [2023-11-23 21:11:06,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1276 transitions. [2023-11-23 21:11:06,400 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1276 transitions. Word has length 62 [2023-11-23 21:11:06,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:06,401 INFO L495 AbstractCegarLoop]: Abstraction has 779 states and 1276 transitions. [2023-11-23 21:11:06,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-23 21:11:06,402 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1276 transitions. [2023-11-23 21:11:06,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-23 21:11:06,408 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:06,408 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:06,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:11:06,409 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:11:06,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:06,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1048350879, now seen corresponding path program 1 times [2023-11-23 21:11:06,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:06,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639666937] [2023-11-23 21:11:06,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:06,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:06,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:11:06,874 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:06,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639666937] [2023-11-23 21:11:06,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639666937] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:06,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:11:06,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:11:06,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445730704] [2023-11-23 21:11:06,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:06,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:11:06,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:06,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:11:06,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:11:06,878 INFO L87 Difference]: Start difference. First operand 779 states and 1276 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-23 21:11:07,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:07,126 INFO L93 Difference]: Finished difference Result 1309 states and 2151 transitions. [2023-11-23 21:11:07,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:11:07,127 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 67 [2023-11-23 21:11:07,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:07,140 INFO L225 Difference]: With dead ends: 1309 [2023-11-23 21:11:07,140 INFO L226 Difference]: Without dead ends: 849 [2023-11-23 21:11:07,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:11:07,147 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 41 mSDsluCounter, 1617 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 2179 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:07,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 2179 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:11:07,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2023-11-23 21:11:07,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 791. [2023-11-23 21:11:07,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 561 states have (on average 1.6327985739750446) internal successors, (916), 596 states have internal predecessors, (916), 184 states have call successors, (184), 40 states have call predecessors, (184), 45 states have return successors, (191), 179 states have call predecessors, (191), 179 states have call successors, (191) [2023-11-23 21:11:07,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1291 transitions. [2023-11-23 21:11:07,263 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1291 transitions. Word has length 67 [2023-11-23 21:11:07,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:07,264 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 1291 transitions. [2023-11-23 21:11:07,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-23 21:11:07,265 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1291 transitions. [2023-11-23 21:11:07,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-23 21:11:07,270 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:07,270 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:07,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:11:07,271 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:11:07,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:07,272 INFO L85 PathProgramCache]: Analyzing trace with hash 784411399, now seen corresponding path program 1 times [2023-11-23 21:11:07,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:07,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527480210] [2023-11-23 21:11:07,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:07,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:07,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:07,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:11:07,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:07,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527480210] [2023-11-23 21:11:07,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527480210] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:07,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:11:07,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 21:11:07,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947089253] [2023-11-23 21:11:07,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:07,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:11:07,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:07,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:11:07,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:11:07,773 INFO L87 Difference]: Start difference. First operand 791 states and 1291 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 6 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-23 21:11:10,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:10,533 INFO L93 Difference]: Finished difference Result 1798 states and 2930 transitions. [2023-11-23 21:11:10,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:11:10,534 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 6 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 71 [2023-11-23 21:11:10,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:10,550 INFO L225 Difference]: With dead ends: 1798 [2023-11-23 21:11:10,551 INFO L226 Difference]: Without dead ends: 1230 [2023-11-23 21:11:10,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:11:10,563 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 1606 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 2189 mSolverCounterSat, 602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1749 SdHoareTripleChecker+Valid, 1418 SdHoareTripleChecker+Invalid, 2791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 2189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:10,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1749 Valid, 1418 Invalid, 2791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 2189 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-23 21:11:10,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2023-11-23 21:11:10,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1136. [2023-11-23 21:11:10,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 794 states have (on average 1.5881612090680102) internal successors, (1261), 846 states have internal predecessors, (1261), 270 states have call successors, (270), 63 states have call predecessors, (270), 71 states have return successors, (286), 263 states have call predecessors, (286), 265 states have call successors, (286) [2023-11-23 21:11:10,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1817 transitions. [2023-11-23 21:11:10,769 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1817 transitions. Word has length 71 [2023-11-23 21:11:10,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:10,770 INFO L495 AbstractCegarLoop]: Abstraction has 1136 states and 1817 transitions. [2023-11-23 21:11:10,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 6 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-23 21:11:10,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1817 transitions. [2023-11-23 21:11:10,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-23 21:11:10,777 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:10,777 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:10,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:11:10,779 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:11:10,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:10,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1495754209, now seen corresponding path program 1 times [2023-11-23 21:11:10,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:10,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225822690] [2023-11-23 21:11:10,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:10,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:10,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:11,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:11:11,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:11,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225822690] [2023-11-23 21:11:11,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225822690] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:11,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:11:11,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:11:11,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842477334] [2023-11-23 21:11:11,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:11,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:11:11,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:11,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:11:11,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:11:11,184 INFO L87 Difference]: Start difference. First operand 1136 states and 1817 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-23 21:11:11,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:11,497 INFO L93 Difference]: Finished difference Result 2193 states and 3564 transitions. [2023-11-23 21:11:11,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:11:11,497 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2023-11-23 21:11:11,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:11,507 INFO L225 Difference]: With dead ends: 2193 [2023-11-23 21:11:11,507 INFO L226 Difference]: Without dead ends: 1136 [2023-11-23 21:11:11,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:11:11,513 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 221 mSDsluCounter, 1394 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 1939 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:11,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 1939 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:11:11,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2023-11-23 21:11:11,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1136. [2023-11-23 21:11:11,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 794 states have (on average 1.5478589420654911) internal successors, (1229), 846 states have internal predecessors, (1229), 270 states have call successors, (270), 63 states have call predecessors, (270), 71 states have return successors, (286), 263 states have call predecessors, (286), 265 states have call successors, (286) [2023-11-23 21:11:11,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1785 transitions. [2023-11-23 21:11:11,649 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1785 transitions. Word has length 74 [2023-11-23 21:11:11,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:11,649 INFO L495 AbstractCegarLoop]: Abstraction has 1136 states and 1785 transitions. [2023-11-23 21:11:11,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-23 21:11:11,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1785 transitions. [2023-11-23 21:11:11,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-23 21:11:11,652 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:11,652 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:11,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:11:11,653 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:11:11,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:11,653 INFO L85 PathProgramCache]: Analyzing trace with hash -721302925, now seen corresponding path program 1 times [2023-11-23 21:11:11,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:11,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378521389] [2023-11-23 21:11:11,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:11,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:11,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:12,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:11:12,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:12,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378521389] [2023-11-23 21:11:12,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378521389] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:12,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:11:12,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:11:12,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442981018] [2023-11-23 21:11:12,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:12,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:11:12,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:12,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:11:12,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:11:12,088 INFO L87 Difference]: Start difference. First operand 1136 states and 1785 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-23 21:11:14,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:14,140 INFO L93 Difference]: Finished difference Result 2180 states and 3442 transitions. [2023-11-23 21:11:14,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 21:11:14,140 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) Word has length 76 [2023-11-23 21:11:14,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:14,151 INFO L225 Difference]: With dead ends: 2180 [2023-11-23 21:11:14,151 INFO L226 Difference]: Without dead ends: 1324 [2023-11-23 21:11:14,156 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 [2023-11-23 21:11:14,157 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 912 mSDsluCounter, 1158 mSDsCounter, 0 mSdLazyCounter, 2022 mSolverCounterSat, 367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 1511 SdHoareTripleChecker+Invalid, 2389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 2022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:14,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [980 Valid, 1511 Invalid, 2389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [367 Valid, 2022 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-23 21:11:14,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2023-11-23 21:11:14,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1163. [2023-11-23 21:11:14,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 812 states have (on average 1.54064039408867) internal successors, (1251), 868 states have internal predecessors, (1251), 271 states have call successors, (271), 68 states have call predecessors, (271), 79 states have return successors, (297), 263 states have call predecessors, (297), 266 states have call successors, (297) [2023-11-23 21:11:14,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1819 transitions. [2023-11-23 21:11:14,260 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1819 transitions. Word has length 76 [2023-11-23 21:11:14,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:14,260 INFO L495 AbstractCegarLoop]: Abstraction has 1163 states and 1819 transitions. [2023-11-23 21:11:14,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-23 21:11:14,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1819 transitions. [2023-11-23 21:11:14,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-23 21:11:14,263 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:14,263 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 21:11:14,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:11:14,263 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:11:14,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:14,264 INFO L85 PathProgramCache]: Analyzing trace with hash 269843856, now seen corresponding path program 1 times [2023-11-23 21:11:14,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:14,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413861379] [2023-11-23 21:11:14,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:14,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:14,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:14,702 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 21:11:14,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:14,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413861379] [2023-11-23 21:11:14,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413861379] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:14,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:11:14,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:11:14,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105279891] [2023-11-23 21:11:14,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:14,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:11:14,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:14,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:11:14,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:11:14,705 INFO L87 Difference]: Start difference. First operand 1163 states and 1819 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-23 21:11:15,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:15,324 INFO L93 Difference]: Finished difference Result 1235 states and 1932 transitions. [2023-11-23 21:11:15,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:11:15,324 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 83 [2023-11-23 21:11:15,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:15,339 INFO L225 Difference]: With dead ends: 1235 [2023-11-23 21:11:15,339 INFO L226 Difference]: Without dead ends: 1220 [2023-11-23 21:11:15,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:11:15,343 INFO L413 NwaCegarLoop]: 501 mSDtfsCounter, 633 mSDsluCounter, 1172 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 1673 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:15,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [634 Valid, 1673 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:11:15,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2023-11-23 21:11:15,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1167. [2023-11-23 21:11:15,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 816 states have (on average 1.5379901960784315) internal successors, (1255), 872 states have internal predecessors, (1255), 271 states have call successors, (271), 68 states have call predecessors, (271), 79 states have return successors, (297), 263 states have call predecessors, (297), 266 states have call successors, (297) [2023-11-23 21:11:15,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1823 transitions. [2023-11-23 21:11:15,465 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1823 transitions. Word has length 83 [2023-11-23 21:11:15,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:15,466 INFO L495 AbstractCegarLoop]: Abstraction has 1167 states and 1823 transitions. [2023-11-23 21:11:15,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-23 21:11:15,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1823 transitions. [2023-11-23 21:11:15,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-23 21:11:15,473 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:15,473 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:15,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:11:15,474 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:11:15,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:15,474 INFO L85 PathProgramCache]: Analyzing trace with hash -505666440, now seen corresponding path program 1 times [2023-11-23 21:11:15,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:15,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507224716] [2023-11-23 21:11:15,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:15,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:15,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:15,850 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 21:11:15,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:15,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507224716] [2023-11-23 21:11:15,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507224716] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:11:15,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:11:15,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:11:15,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661849559] [2023-11-23 21:11:15,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:11:15,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:11:15,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:11:15,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:11:15,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:11:15,854 INFO L87 Difference]: Start difference. First operand 1167 states and 1823 transitions. Second operand has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-23 21:11:16,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:11:16,069 INFO L93 Difference]: Finished difference Result 1186 states and 1847 transitions. [2023-11-23 21:11:16,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:11:16,070 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) Word has length 88 [2023-11-23 21:11:16,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:11:16,085 INFO L225 Difference]: With dead ends: 1186 [2023-11-23 21:11:16,085 INFO L226 Difference]: Without dead ends: 1171 [2023-11-23 21:11:16,087 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 [2023-11-23 21:11:16,090 INFO L413 NwaCegarLoop]: 511 mSDtfsCounter, 41 mSDsluCounter, 1995 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 2506 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:11:16,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 2506 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:11:16,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2023-11-23 21:11:16,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1167. [2023-11-23 21:11:16,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 816 states have (on average 1.5343137254901962) internal successors, (1252), 872 states have internal predecessors, (1252), 271 states have call successors, (271), 68 states have call predecessors, (271), 79 states have return successors, (297), 263 states have call predecessors, (297), 266 states have call successors, (297) [2023-11-23 21:11:16,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1820 transitions. [2023-11-23 21:11:16,201 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1820 transitions. Word has length 88 [2023-11-23 21:11:16,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:11:16,202 INFO L495 AbstractCegarLoop]: Abstraction has 1167 states and 1820 transitions. [2023-11-23 21:11:16,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-23 21:11:16,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1820 transitions. [2023-11-23 21:11:16,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-23 21:11:16,205 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:11:16,205 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:11:16,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:11:16,205 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:11:16,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:11:16,206 INFO L85 PathProgramCache]: Analyzing trace with hash -355919872, now seen corresponding path program 1 times [2023-11-23 21:11:16,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:11:16,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930802073] [2023-11-23 21:11:16,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:16,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:11:16,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 21:11:18,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:11:18,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930802073] [2023-11-23 21:11:18,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930802073] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:11:18,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773168574] [2023-11-23 21:11:18,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:11:18,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:11:18,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_176c873e-6196-4f92-81d3-cee41335bfe8/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:11:18,344 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_176c873e-6196-4f92-81d3-cee41335bfe8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:11:18,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_176c873e-6196-4f92-81d3-cee41335bfe8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:11:18,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:11:18,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 1763 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-23 21:11:18,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:11:19,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 21:11:19,693 INFO L327 TraceCheckSpWp]: Computing backward predicates...