./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-deagle/airline-25.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-deagle/airline-25.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a0d81069750f24e52e04bdb7efecd6d77b64aec41e058c154f75fbba11e6c11d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:23:51,049 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:23:51,052 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:23:51,108 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:23:51,109 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:23:51,114 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:23:51,117 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:23:51,122 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:23:51,125 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:23:51,134 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:23:51,136 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:23:51,139 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:23:51,139 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:23:51,142 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:23:51,145 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:23:51,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:23:51,150 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:23:51,151 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:23:51,154 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:23:51,161 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:23:51,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:23:51,169 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:23:51,172 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:23:51,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:23:51,186 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:23:51,186 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:23:51,187 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:23:51,189 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:23:51,190 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:23:51,191 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:23:51,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:23:51,193 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:23:51,195 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:23:51,197 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:23:51,199 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:23:51,200 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:23:51,200 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:23:51,201 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:23:51,201 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:23:51,202 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:23:51,203 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:23:51,204 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:23:51,250 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:23:51,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:23:51,251 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:23:51,251 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:23:51,252 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:23:51,252 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:23:51,253 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:23:51,253 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:23:51,253 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:23:51,253 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:23:51,255 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:23:51,255 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:23:51,255 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:23:51,255 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:23:51,256 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:23:51,256 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:23:51,256 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:23:51,256 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:23:51,257 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:23:51,257 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:23:51,258 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:23:51,258 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:23:51,258 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:23:51,258 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:23:51,259 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:23:51,259 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:23:51,259 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:23:51,259 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:23:51,260 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:23:51,260 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:23:51,260 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:23:51,261 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:23:51,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:23:51,261 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:23:51,261 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:23:51,262 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:23:51,262 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:23:51,262 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:23:51,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:23:51,263 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:23:51,263 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:23:51,263 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0d81069750f24e52e04bdb7efecd6d77b64aec41e058c154f75fbba11e6c11d [2022-10-17 17:23:51,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:23:51,594 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:23:51,597 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:23:51,598 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:23:51,599 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:23:51,601 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/pthread-deagle/airline-25.i [2022-10-17 17:23:51,665 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/data/57ac7f940/b312f8b61660445db3de85ad0b9b45b2/FLAG677332f8d [2022-10-17 17:23:52,266 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:23:52,267 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/sv-benchmarks/c/pthread-deagle/airline-25.i [2022-10-17 17:23:52,292 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/data/57ac7f940/b312f8b61660445db3de85ad0b9b45b2/FLAG677332f8d [2022-10-17 17:23:52,496 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/data/57ac7f940/b312f8b61660445db3de85ad0b9b45b2 [2022-10-17 17:23:52,500 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:23:52,502 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:23:52,507 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:23:52,507 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:23:52,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:23:52,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:23:52" (1/1) ... [2022-10-17 17:23:52,515 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7297046b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:52, skipping insertion in model container [2022-10-17 17:23:52,515 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:23:52" (1/1) ... [2022-10-17 17:23:52,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:23:52,598 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:23:53,096 WARN L230 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_52217fad-22df-4d74-9033-6f6be34df71c/sv-benchmarks/c/pthread-deagle/airline-25.i[32101,32114] [2022-10-17 17:23:53,100 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:23:53,109 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:23:53,172 WARN L230 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_52217fad-22df-4d74-9033-6f6be34df71c/sv-benchmarks/c/pthread-deagle/airline-25.i[32101,32114] [2022-10-17 17:23:53,188 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:23:53,228 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:23:53,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:53 WrapperNode [2022-10-17 17:23:53,229 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:23:53,230 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:23:53,230 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:23:53,230 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:23:53,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:53" (1/1) ... [2022-10-17 17:23:53,267 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:53" (1/1) ... [2022-10-17 17:23:53,298 INFO L138 Inliner]: procedures = 162, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 61 [2022-10-17 17:23:53,298 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:23:53,300 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:23:53,300 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:23:53,300 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:23:53,310 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:53" (1/1) ... [2022-10-17 17:23:53,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:53" (1/1) ... [2022-10-17 17:23:53,321 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:53" (1/1) ... [2022-10-17 17:23:53,322 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:53" (1/1) ... [2022-10-17 17:23:53,328 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:53" (1/1) ... [2022-10-17 17:23:53,332 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:53" (1/1) ... [2022-10-17 17:23:53,336 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:53" (1/1) ... [2022-10-17 17:23:53,338 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:53" (1/1) ... [2022-10-17 17:23:53,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:23:53,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:23:53,343 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:23:53,343 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:23:53,344 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:53" (1/1) ... [2022-10-17 17:23:53,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:23:53,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:23:53,379 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:23:53,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:23:53,451 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:23:53,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:23:53,451 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-10-17 17:23:53,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:23:53,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:23:53,452 INFO L130 BoogieDeclarations]: Found specification of procedure salethread [2022-10-17 17:23:53,452 INFO L138 BoogieDeclarations]: Found implementation of procedure salethread [2022-10-17 17:23:53,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:23:53,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:23:53,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-10-17 17:23:53,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:23:53,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:23:53,454 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-10-17 17:23:53,601 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:23:53,603 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:23:53,772 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:23:53,781 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:23:53,781 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-17 17:23:53,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:23:53 BoogieIcfgContainer [2022-10-17 17:23:53,784 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:23:53,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:23:53,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:23:53,792 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:23:53,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:23:52" (1/3) ... [2022-10-17 17:23:53,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f82c93a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:23:53, skipping insertion in model container [2022-10-17 17:23:53,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:53" (2/3) ... [2022-10-17 17:23:53,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f82c93a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:23:53, skipping insertion in model container [2022-10-17 17:23:53,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:23:53" (3/3) ... [2022-10-17 17:23:53,796 INFO L112 eAbstractionObserver]: Analyzing ICFG airline-25.i [2022-10-17 17:23:53,805 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-10-17 17:23:53,817 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:23:53,817 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:23:53,817 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-10-17 17:23:53,878 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-10-17 17:23:53,921 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-10-17 17:23:53,942 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 66 places, 69 transitions, 146 flow [2022-10-17 17:23:53,952 INFO L112 LiptonReduction]: Starting Lipton reduction on Petri net that has 66 places, 69 transitions, 146 flow [2022-10-17 17:23:53,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 69 transitions, 146 flow [2022-10-17 17:23:54,049 INFO L130 PetriNetUnfolder]: 9/92 cut-off events. [2022-10-17 17:23:54,049 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-10-17 17:23:54,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 92 events. 9/92 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 141 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 47. Up to 4 conditions per place. [2022-10-17 17:23:54,059 INFO L118 LiptonReduction]: Number of co-enabled transitions 580 [2022-10-17 17:23:56,724 INFO L133 LiptonReduction]: Checked pairs total: 706 [2022-10-17 17:23:56,724 INFO L135 LiptonReduction]: Total number of compositions: 72 [2022-10-17 17:23:56,741 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 14 places, 12 transitions, 32 flow [2022-10-17 17:23:56,757 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 23 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:56,787 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:23:56,798 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1b13943e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:23:56,799 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-10-17 17:23:56,801 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:56,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-10-17 17:23:56,807 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:56,808 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-10-17 17:23:56,809 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 17:23:56,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:56,819 INFO L85 PathProgramCache]: Analyzing trace with hash 278767, now seen corresponding path program 1 times [2022-10-17 17:23:56,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:56,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824640419] [2022-10-17 17:23:56,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:56,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:56,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:57,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:57,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:57,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824640419] [2022-10-17 17:23:57,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824640419] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:57,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:57,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:23:57,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444152665] [2022-10-17 17:23:57,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:57,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:23:57,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:57,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:23:57,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:23:57,176 INFO L87 Difference]: Start difference. First operand has 23 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:57,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:57,225 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2022-10-17 17:23:57,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:23:57,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-10-17 17:23:57,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:57,237 INFO L225 Difference]: With dead ends: 23 [2022-10-17 17:23:57,237 INFO L226 Difference]: Without dead ends: 20 [2022-10-17 17:23:57,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:23:57,242 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 3 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:57,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 2 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:23:57,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-10-17 17:23:57,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-10-17 17:23:57,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:57,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2022-10-17 17:23:57,281 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 3 [2022-10-17 17:23:57,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:57,282 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2022-10-17 17:23:57,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:57,282 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2022-10-17 17:23:57,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-17 17:23:57,283 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:57,283 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-10-17 17:23:57,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:23:57,284 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 17:23:57,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:57,285 INFO L85 PathProgramCache]: Analyzing trace with hash -258795920, now seen corresponding path program 1 times [2022-10-17 17:23:57,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:57,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144512437] [2022-10-17 17:23:57,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:57,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:57,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 17:23:57,315 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 17:23:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 17:23:57,357 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-10-17 17:23:57,357 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 17:23:57,359 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-10-17 17:23:57,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-10-17 17:23:57,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:23:57,365 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-10-17 17:23:57,367 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-10-17 17:23:57,368 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-10-17 17:23:57,384 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-10-17 17:23:57,387 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-10-17 17:23:57,390 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 77 places, 81 transitions, 180 flow [2022-10-17 17:23:57,393 INFO L112 LiptonReduction]: Starting Lipton reduction on Petri net that has 77 places, 81 transitions, 180 flow [2022-10-17 17:23:57,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 81 transitions, 180 flow [2022-10-17 17:23:57,459 INFO L130 PetriNetUnfolder]: 18/158 cut-off events. [2022-10-17 17:23:57,460 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-10-17 17:23:57,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 158 events. 18/158 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 308 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 94. Up to 8 conditions per place. [2022-10-17 17:23:57,467 INFO L118 LiptonReduction]: Number of co-enabled transitions 1580 [2022-10-17 17:23:59,966 INFO L133 LiptonReduction]: Checked pairs total: 4371 [2022-10-17 17:23:59,966 INFO L135 LiptonReduction]: Total number of compositions: 74 [2022-10-17 17:23:59,967 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 26 places, 27 transitions, 72 flow [2022-10-17 17:24:00,009 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 313 states, 304 states have (on average 3.0625) internal successors, (931), 312 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:00,010 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:24:00,012 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1b13943e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:24:00,012 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-10-17 17:24:00,015 INFO L276 IsEmpty]: Start isEmpty. Operand has 313 states, 304 states have (on average 3.0625) internal successors, (931), 312 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:00,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-10-17 17:24:00,016 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:24:00,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-10-17 17:24:00,016 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 17:24:00,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:24:00,017 INFO L85 PathProgramCache]: Analyzing trace with hash 445655, now seen corresponding path program 1 times [2022-10-17 17:24:00,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:24:00,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257379334] [2022-10-17 17:24:00,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:24:00,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:24:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:24:00,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:24:00,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:24:00,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257379334] [2022-10-17 17:24:00,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257379334] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:24:00,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:24:00,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:24:00,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672042404] [2022-10-17 17:24:00,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:24:00,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:24:00,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:24:00,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:24:00,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:24:00,093 INFO L87 Difference]: Start difference. First operand has 313 states, 304 states have (on average 3.0625) internal successors, (931), 312 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:00,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:24:00,193 INFO L93 Difference]: Finished difference Result 313 states and 930 transitions. [2022-10-17 17:24:00,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:24:00,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-10-17 17:24:00,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:24:00,204 INFO L225 Difference]: With dead ends: 313 [2022-10-17 17:24:00,204 INFO L226 Difference]: Without dead ends: 277 [2022-10-17 17:24:00,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:24:00,207 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:24:00,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 8 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:24:00,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-10-17 17:24:00,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2022-10-17 17:24:00,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 272 states have (on average 3.0220588235294117) internal successors, (822), 276 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:00,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 822 transitions. [2022-10-17 17:24:00,289 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 822 transitions. Word has length 3 [2022-10-17 17:24:00,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:24:00,290 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 822 transitions. [2022-10-17 17:24:00,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:00,291 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 822 transitions. [2022-10-17 17:24:00,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-17 17:24:00,292 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:24:00,292 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:24:00,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:24:00,296 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 17:24:00,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:24:00,299 INFO L85 PathProgramCache]: Analyzing trace with hash -532491043, now seen corresponding path program 1 times [2022-10-17 17:24:00,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:24:00,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943998166] [2022-10-17 17:24:00,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:24:00,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:24:00,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:24:00,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:24:00,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:24:00,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943998166] [2022-10-17 17:24:00,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943998166] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:24:00,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995307988] [2022-10-17 17:24:00,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:24:00,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:24:00,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:24:00,436 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:24:00,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:24:00,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:24:00,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 17:24:00,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:24:00,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:24:00,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:24:00,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995307988] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:24:00,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:24:00,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2022-10-17 17:24:00,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98963523] [2022-10-17 17:24:00,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:24:00,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:24:00,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:24:00,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:24:00,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:24:00,528 INFO L87 Difference]: Start difference. First operand 277 states and 822 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:00,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:24:00,623 INFO L93 Difference]: Finished difference Result 264 states and 757 transitions. [2022-10-17 17:24:00,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:24:00,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-17 17:24:00,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:24:00,628 INFO L225 Difference]: With dead ends: 264 [2022-10-17 17:24:00,629 INFO L226 Difference]: Without dead ends: 264 [2022-10-17 17:24:00,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:24:00,630 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 16 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:24:00,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 9 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:24:00,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-10-17 17:24:00,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 257. [2022-10-17 17:24:00,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 253 states have (on average 2.9565217391304346) internal successors, (748), 256 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:00,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 748 transitions. [2022-10-17 17:24:00,694 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 748 transitions. Word has length 7 [2022-10-17 17:24:00,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:24:00,695 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 748 transitions. [2022-10-17 17:24:00,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:00,696 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 748 transitions. [2022-10-17 17:24:00,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 17:24:00,697 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:24:00,697 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-10-17 17:24:00,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:24:00,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:24:00,932 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 17:24:00,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:24:00,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1281523137, now seen corresponding path program 1 times [2022-10-17 17:24:00,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:24:00,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782022488] [2022-10-17 17:24:00,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:24:00,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:24:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 17:24:00,958 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 17:24:00,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 17:24:01,005 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-10-17 17:24:01,005 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 17:24:01,006 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-10-17 17:24:01,006 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-10-17 17:24:01,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 17:24:01,007 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-10-17 17:24:01,007 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-10-17 17:24:01,007 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-10-17 17:24:01,027 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-10-17 17:24:01,030 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-10-17 17:24:01,031 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 88 places, 93 transitions, 216 flow [2022-10-17 17:24:01,031 INFO L112 LiptonReduction]: Starting Lipton reduction on Petri net that has 88 places, 93 transitions, 216 flow [2022-10-17 17:24:01,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 93 transitions, 216 flow [2022-10-17 17:24:01,146 INFO L130 PetriNetUnfolder]: 34/269 cut-off events. [2022-10-17 17:24:01,147 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-10-17 17:24:01,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 269 events. 34/269 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 693 event pairs, 1 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 166. Up to 16 conditions per place. [2022-10-17 17:24:01,159 INFO L118 LiptonReduction]: Number of co-enabled transitions 2760 [2022-10-17 17:24:03,698 INFO L133 LiptonReduction]: Checked pairs total: 7331 [2022-10-17 17:24:03,699 INFO L135 LiptonReduction]: Total number of compositions: 83 [2022-10-17 17:24:03,700 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 33 transitions, 96 flow [2022-10-17 17:24:03,780 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1482 states, 1465 states have (on average 3.868941979522184) internal successors, (5668), 1481 states have internal predecessors, (5668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:03,781 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:24:03,782 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1b13943e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:24:03,783 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-10-17 17:24:03,789 INFO L276 IsEmpty]: Start isEmpty. Operand has 1482 states, 1465 states have (on average 3.868941979522184) internal successors, (5668), 1481 states have internal predecessors, (5668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:03,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-10-17 17:24:03,790 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:24:03,790 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-10-17 17:24:03,791 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 17:24:03,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:24:03,791 INFO L85 PathProgramCache]: Analyzing trace with hash 632267, now seen corresponding path program 1 times [2022-10-17 17:24:03,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:24:03,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979120866] [2022-10-17 17:24:03,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:24:03,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:24:03,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:24:03,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:24:03,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:24:03,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979120866] [2022-10-17 17:24:03,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979120866] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:24:03,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:24:03,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:24:03,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719830078] [2022-10-17 17:24:03,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:24:03,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:24:03,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:24:03,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:24:03,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:24:03,837 INFO L87 Difference]: Start difference. First operand has 1482 states, 1465 states have (on average 3.868941979522184) internal successors, (5668), 1481 states have internal predecessors, (5668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:03,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:24:03,946 INFO L93 Difference]: Finished difference Result 1482 states and 5667 transitions. [2022-10-17 17:24:03,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:24:03,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-10-17 17:24:03,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:24:03,965 INFO L225 Difference]: With dead ends: 1482 [2022-10-17 17:24:03,966 INFO L226 Difference]: Without dead ends: 1302 [2022-10-17 17:24:03,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:24:03,967 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:24:03,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 10 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:24:03,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2022-10-17 17:24:04,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1302. [2022-10-17 17:24:04,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1293 states have (on average 3.8538283062645013) internal successors, (4983), 1301 states have internal predecessors, (4983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:04,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 4983 transitions. [2022-10-17 17:24:04,051 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 4983 transitions. Word has length 3 [2022-10-17 17:24:04,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:24:04,051 INFO L495 AbstractCegarLoop]: Abstraction has 1302 states and 4983 transitions. [2022-10-17 17:24:04,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:04,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 4983 transitions. [2022-10-17 17:24:04,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-17 17:24:04,053 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:24:04,053 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:24:04,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 17:24:04,053 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 17:24:04,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:24:04,054 INFO L85 PathProgramCache]: Analyzing trace with hash 184938751, now seen corresponding path program 1 times [2022-10-17 17:24:04,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:24:04,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135865535] [2022-10-17 17:24:04,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:24:04,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:24:04,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:24:04,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:24:04,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:24:04,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135865535] [2022-10-17 17:24:04,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135865535] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:24:04,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492822677] [2022-10-17 17:24:04,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:24:04,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:24:04,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:24:04,104 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:24:04,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:24:04,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:24:04,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 17:24:04,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:24:04,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:24:04,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:24:04,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492822677] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:24:04,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:24:04,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2022-10-17 17:24:04,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052506353] [2022-10-17 17:24:04,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:24:04,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:24:04,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:24:04,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:24:04,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:24:04,184 INFO L87 Difference]: Start difference. First operand 1302 states and 4983 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:04,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:24:04,275 INFO L93 Difference]: Finished difference Result 1272 states and 4718 transitions. [2022-10-17 17:24:04,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:24:04,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-17 17:24:04,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:24:04,291 INFO L225 Difference]: With dead ends: 1272 [2022-10-17 17:24:04,291 INFO L226 Difference]: Without dead ends: 1272 [2022-10-17 17:24:04,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:24:04,293 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:24:04,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 12 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:24:04,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2022-10-17 17:24:04,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 1227. [2022-10-17 17:24:04,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 1219 states have (on average 3.7883511074651355) internal successors, (4618), 1226 states have internal predecessors, (4618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:04,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 4618 transitions. [2022-10-17 17:24:04,356 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 4618 transitions. Word has length 7 [2022-10-17 17:24:04,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:24:04,356 INFO L495 AbstractCegarLoop]: Abstraction has 1227 states and 4618 transitions. [2022-10-17 17:24:04,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:04,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 4618 transitions. [2022-10-17 17:24:04,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-17 17:24:04,359 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:24:04,359 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:24:04,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 17:24:04,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-10-17 17:24:04,582 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 17:24:04,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:24:04,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1624955791, now seen corresponding path program 1 times [2022-10-17 17:24:04,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:24:04,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855136731] [2022-10-17 17:24:04,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:24:04,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:24:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:24:04,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:24:04,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:24:04,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855136731] [2022-10-17 17:24:04,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855136731] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:24:04,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:24:04,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:24:04,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480377759] [2022-10-17 17:24:04,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:24:04,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:24:04,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:24:04,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:24:04,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:24:04,623 INFO L87 Difference]: Start difference. First operand 1227 states and 4618 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:04,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:24:04,704 INFO L93 Difference]: Finished difference Result 2018 states and 6487 transitions. [2022-10-17 17:24:04,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:24:04,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-10-17 17:24:04,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:24:04,726 INFO L225 Difference]: With dead ends: 2018 [2022-10-17 17:24:04,726 INFO L226 Difference]: Without dead ends: 2018 [2022-10-17 17:24:04,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:24:04,728 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 23 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:24:04,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 10 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:24:04,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2022-10-17 17:24:04,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 1542. [2022-10-17 17:24:04,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1542 states, 1534 states have (on average 3.3754889178617993) internal successors, (5178), 1541 states have internal predecessors, (5178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:04,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 5178 transitions. [2022-10-17 17:24:04,820 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 5178 transitions. Word has length 12 [2022-10-17 17:24:04,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:24:04,821 INFO L495 AbstractCegarLoop]: Abstraction has 1542 states and 5178 transitions. [2022-10-17 17:24:04,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:04,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 5178 transitions. [2022-10-17 17:24:04,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-17 17:24:04,849 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:24:04,849 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:24:04,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 17:24:04,850 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 17:24:04,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:24:04,850 INFO L85 PathProgramCache]: Analyzing trace with hash -500859998, now seen corresponding path program 1 times [2022-10-17 17:24:04,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:24:04,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598304226] [2022-10-17 17:24:04,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:24:04,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:24:04,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:24:04,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:24:04,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:24:04,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598304226] [2022-10-17 17:24:04,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598304226] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:24:04,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615734561] [2022-10-17 17:24:04,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:24:04,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:24:04,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:24:04,920 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:24:04,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 17:24:05,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:24:05,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:24:05,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:24:05,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:24:05,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:24:05,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:24:05,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615734561] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:24:05,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1267282801] [2022-10-17 17:24:05,101 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-10-17 17:24:05,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:24:05,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-10-17 17:24:05,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089578371] [2022-10-17 17:24:05,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:24:05,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:24:05,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:24:05,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:24:05,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:24:05,113 INFO L87 Difference]: Start difference. First operand 1542 states and 5178 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:05,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:24:05,206 INFO L93 Difference]: Finished difference Result 740 states and 2530 transitions. [2022-10-17 17:24:05,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:24:05,207 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-10-17 17:24:05,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:24:05,215 INFO L225 Difference]: With dead ends: 740 [2022-10-17 17:24:05,215 INFO L226 Difference]: Without dead ends: 740 [2022-10-17 17:24:05,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:24:05,216 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 105 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:24:05,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 13 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:24:05,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-10-17 17:24:05,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 740. [2022-10-17 17:24:05,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 3.4235453315290933) internal successors, (2530), 739 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:05,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2530 transitions. [2022-10-17 17:24:05,249 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2530 transitions. Word has length 14 [2022-10-17 17:24:05,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:24:05,249 INFO L495 AbstractCegarLoop]: Abstraction has 740 states and 2530 transitions. [2022-10-17 17:24:05,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:05,250 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2530 transitions. [2022-10-17 17:24:05,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-17 17:24:05,252 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:24:05,252 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-10-17 17:24:05,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 17:24:05,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:24:05,480 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 17:24:05,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:24:05,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1770649854, now seen corresponding path program 1 times [2022-10-17 17:24:05,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:24:05,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68186264] [2022-10-17 17:24:05,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:24:05,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:24:05,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 17:24:05,500 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 17:24:05,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 17:24:05,517 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-10-17 17:24:05,517 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 17:24:05,518 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-10-17 17:24:05,518 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-10-17 17:24:05,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-17 17:24:05,519 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-10-17 17:24:05,519 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-10-17 17:24:05,519 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-10-17 17:24:05,548 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-10-17 17:24:05,553 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-10-17 17:24:05,553 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 105 transitions, 254 flow [2022-10-17 17:24:05,555 INFO L112 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 105 transitions, 254 flow [2022-10-17 17:24:05,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 105 transitions, 254 flow [2022-10-17 17:24:05,651 INFO L130 PetriNetUnfolder]: 66/472 cut-off events. [2022-10-17 17:24:05,651 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-10-17 17:24:05,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 527 conditions, 472 events. 66/472 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1674 event pairs, 6 based on Foata normal form. 0/390 useless extension candidates. Maximal degree in co-relation 289. Up to 32 conditions per place. [2022-10-17 17:24:05,669 INFO L118 LiptonReduction]: Number of co-enabled transitions 4200 [2022-10-17 17:24:08,497 INFO L133 LiptonReduction]: Checked pairs total: 11708 [2022-10-17 17:24:08,498 INFO L135 LiptonReduction]: Total number of compositions: 93 [2022-10-17 17:24:08,499 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 41 transitions, 126 flow [2022-10-17 17:24:09,006 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 8602 states, 8569 states have (on average 4.903956120900922) internal successors, (42022), 8601 states have internal predecessors, (42022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:09,007 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:24:09,008 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1b13943e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:24:09,008 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-10-17 17:24:09,038 INFO L276 IsEmpty]: Start isEmpty. Operand has 8602 states, 8569 states have (on average 4.903956120900922) internal successors, (42022), 8601 states have internal predecessors, (42022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:09,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-10-17 17:24:09,039 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:24:09,039 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-10-17 17:24:09,039 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 17:24:09,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:24:09,040 INFO L85 PathProgramCache]: Analyzing trace with hash 840605, now seen corresponding path program 1 times [2022-10-17 17:24:09,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:24:09,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537707747] [2022-10-17 17:24:09,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:24:09,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:24:09,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:24:09,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:24:09,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:24:09,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537707747] [2022-10-17 17:24:09,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537707747] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:24:09,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:24:09,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:24:09,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705527654] [2022-10-17 17:24:09,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:24:09,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:24:09,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:24:09,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:24:09,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:24:09,094 INFO L87 Difference]: Start difference. First operand has 8602 states, 8569 states have (on average 4.903956120900922) internal successors, (42022), 8601 states have internal predecessors, (42022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:09,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:24:09,363 INFO L93 Difference]: Finished difference Result 8602 states and 42021 transitions. [2022-10-17 17:24:09,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:24:09,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-10-17 17:24:09,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:24:09,488 INFO L225 Difference]: With dead ends: 8602 [2022-10-17 17:24:09,488 INFO L226 Difference]: Without dead ends: 7522 [2022-10-17 17:24:09,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:24:09,490 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:24:09,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 10 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:24:09,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7522 states. [2022-10-17 17:24:09,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7522 to 7522. [2022-10-17 17:24:10,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7522 states, 7505 states have (on average 4.908327781479014) internal successors, (36837), 7521 states have internal predecessors, (36837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:10,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7522 states to 7522 states and 36837 transitions. [2022-10-17 17:24:10,068 INFO L78 Accepts]: Start accepts. Automaton has 7522 states and 36837 transitions. Word has length 3 [2022-10-17 17:24:10,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:24:10,068 INFO L495 AbstractCegarLoop]: Abstraction has 7522 states and 36837 transitions. [2022-10-17 17:24:10,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:10,068 INFO L276 IsEmpty]: Start isEmpty. Operand 7522 states and 36837 transitions. [2022-10-17 17:24:10,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-17 17:24:10,069 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:24:10,069 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:24:10,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-10-17 17:24:10,070 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 17:24:10,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:24:10,071 INFO L85 PathProgramCache]: Analyzing trace with hash -139839111, now seen corresponding path program 1 times [2022-10-17 17:24:10,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:24:10,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119300526] [2022-10-17 17:24:10,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:24:10,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:24:10,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:24:10,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:24:10,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:24:10,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119300526] [2022-10-17 17:24:10,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119300526] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:24:10,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084589072] [2022-10-17 17:24:10,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:24:10,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:24:10,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:24:10,128 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:24:10,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 17:24:10,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:24:10,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 17:24:10,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:24:10,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:24:10,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:24:10,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084589072] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:24:10,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:24:10,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2022-10-17 17:24:10,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620233485] [2022-10-17 17:24:10,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:24:10,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:24:10,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:24:10,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:24:10,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:24:10,224 INFO L87 Difference]: Start difference. First operand 7522 states and 36837 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:10,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:24:10,508 INFO L93 Difference]: Finished difference Result 7504 states and 35866 transitions. [2022-10-17 17:24:10,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:24:10,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-17 17:24:10,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:24:10,585 INFO L225 Difference]: With dead ends: 7504 [2022-10-17 17:24:10,585 INFO L226 Difference]: Without dead ends: 7504 [2022-10-17 17:24:10,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:24:10,586 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 28 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:24:10,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 12 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:24:10,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7504 states. [2022-10-17 17:24:11,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7504 to 7177. [2022-10-17 17:24:11,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7177 states, 7161 states have (on average 4.846809104873621) internal successors, (34708), 7176 states have internal predecessors, (34708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:11,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7177 states to 7177 states and 34708 transitions. [2022-10-17 17:24:11,366 INFO L78 Accepts]: Start accepts. Automaton has 7177 states and 34708 transitions. Word has length 7 [2022-10-17 17:24:11,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:24:11,366 INFO L495 AbstractCegarLoop]: Abstraction has 7177 states and 34708 transitions. [2022-10-17 17:24:11,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:11,367 INFO L276 IsEmpty]: Start isEmpty. Operand 7177 states and 34708 transitions. [2022-10-17 17:24:11,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-17 17:24:11,368 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:24:11,368 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:24:11,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 17:24:11,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-10-17 17:24:11,596 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 17:24:11,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:24:11,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1458740011, now seen corresponding path program 1 times [2022-10-17 17:24:11,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:24:11,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197701564] [2022-10-17 17:24:11,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:24:11,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:24:11,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:24:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:24:11,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:24:11,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197701564] [2022-10-17 17:24:11,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197701564] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:24:11,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011526672] [2022-10-17 17:24:11,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:24:11,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:24:11,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:24:11,680 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:24:11,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 17:24:11,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:24:11,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:24:11,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:24:11,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:24:11,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:24:11,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011526672] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:24:11,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:24:11,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-10-17 17:24:11,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555727250] [2022-10-17 17:24:11,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:24:11,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:24:11,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:24:11,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:24:11,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:24:11,770 INFO L87 Difference]: Start difference. First operand 7177 states and 34708 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:12,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:24:12,093 INFO L93 Difference]: Finished difference Result 12576 states and 53103 transitions. [2022-10-17 17:24:12,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:24:12,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-10-17 17:24:12,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:24:12,193 INFO L225 Difference]: With dead ends: 12576 [2022-10-17 17:24:12,194 INFO L226 Difference]: Without dead ends: 12576 [2022-10-17 17:24:12,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:24:12,195 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 25 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:24:12,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 10 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:24:12,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12576 states. [2022-10-17 17:24:12,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12576 to 10026. [2022-10-17 17:24:12,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10026 states, 10010 states have (on average 4.367032967032967) internal successors, (43714), 10025 states have internal predecessors, (43714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:12,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10026 states to 10026 states and 43714 transitions. [2022-10-17 17:24:12,921 INFO L78 Accepts]: Start accepts. Automaton has 10026 states and 43714 transitions. Word has length 12 [2022-10-17 17:24:12,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:24:12,922 INFO L495 AbstractCegarLoop]: Abstraction has 10026 states and 43714 transitions. [2022-10-17 17:24:12,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:12,922 INFO L276 IsEmpty]: Start isEmpty. Operand 10026 states and 43714 transitions. [2022-10-17 17:24:12,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-17 17:24:12,924 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:24:12,924 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:24:12,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 17:24:13,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:24:13,140 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 17:24:13,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:24:13,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1774717624, now seen corresponding path program 1 times [2022-10-17 17:24:13,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:24:13,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756621465] [2022-10-17 17:24:13,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:24:13,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:24:13,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:24:13,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:24:13,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:24:13,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756621465] [2022-10-17 17:24:13,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756621465] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:24:13,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225394257] [2022-10-17 17:24:13,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:24:13,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:24:13,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:24:13,227 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:24:13,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 17:24:13,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:24:13,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:24:13,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:24:13,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:24:13,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:24:13,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:24:13,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225394257] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:24:13,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1770465606] [2022-10-17 17:24:13,347 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-10-17 17:24:13,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:24:13,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-10-17 17:24:13,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027156038] [2022-10-17 17:24:13,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:24:13,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:24:13,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:24:13,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:24:13,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:24:13,351 INFO L87 Difference]: Start difference. First operand 10026 states and 43714 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:13,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:24:13,587 INFO L93 Difference]: Finished difference Result 9844 states and 42792 transitions. [2022-10-17 17:24:13,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:24:13,588 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-10-17 17:24:13,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:24:13,804 INFO L225 Difference]: With dead ends: 9844 [2022-10-17 17:24:13,804 INFO L226 Difference]: Without dead ends: 9844 [2022-10-17 17:24:13,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:24:13,805 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 80 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:24:13,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 19 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:24:13,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9844 states. [2022-10-17 17:24:14,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9844 to 9844. [2022-10-17 17:24:14,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9844 states, 9828 states have (on average 4.354090354090354) internal successors, (42792), 9843 states have internal predecessors, (42792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:14,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9844 states to 9844 states and 42792 transitions. [2022-10-17 17:24:14,307 INFO L78 Accepts]: Start accepts. Automaton has 9844 states and 42792 transitions. Word has length 14 [2022-10-17 17:24:14,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:24:14,308 INFO L495 AbstractCegarLoop]: Abstraction has 9844 states and 42792 transitions. [2022-10-17 17:24:14,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:14,308 INFO L276 IsEmpty]: Start isEmpty. Operand 9844 states and 42792 transitions. [2022-10-17 17:24:14,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-10-17 17:24:14,314 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:24:14,314 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-10-17 17:24:14,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-17 17:24:14,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52217fad-22df-4d74-9033-6f6be34df71c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-10-17 17:24:14,527 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 17:24:14,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:24:14,528 INFO L85 PathProgramCache]: Analyzing trace with hash 517916142, now seen corresponding path program 1 times [2022-10-17 17:24:14,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:24:14,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145476007] [2022-10-17 17:24:14,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:24:14,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:24:14,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 17:24:14,547 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 17:24:14,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 17:24:14,573 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-10-17 17:24:14,573 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 17:24:14,573 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-10-17 17:24:14,573 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-10-17 17:24:14,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-10-17 17:24:14,574 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-10-17 17:24:14,574 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-10-17 17:24:14,574 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-10-17 17:24:14,597 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-10-17 17:24:14,599 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-10-17 17:24:14,599 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 110 places, 117 transitions, 294 flow [2022-10-17 17:24:14,600 INFO L112 LiptonReduction]: Starting Lipton reduction on Petri net that has 110 places, 117 transitions, 294 flow [2022-10-17 17:24:14,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 117 transitions, 294 flow [2022-10-17 17:24:14,747 INFO L130 PetriNetUnfolder]: 134/863 cut-off events. [2022-10-17 17:24:14,747 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-10-17 17:24:14,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 974 conditions, 863 events. 134/863 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3993 event pairs, 23 based on Foata normal form. 0/713 useless extension candidates. Maximal degree in co-relation 517. Up to 80 conditions per place. [2022-10-17 17:24:14,783 INFO L118 LiptonReduction]: Number of co-enabled transitions 5900 [2022-10-17 17:24:17,565 INFO L133 LiptonReduction]: Checked pairs total: 19056 [2022-10-17 17:24:17,565 INFO L135 LiptonReduction]: Total number of compositions: 102 [2022-10-17 17:24:17,566 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46 places, 49 transitions, 158 flow [2022-10-17 17:24:20,328 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 48902 states, 48837 states have (on average 5.930278272621169) internal successors, (289617), 48901 states have internal predecessors, (289617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:20,335 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:24:20,336 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1b13943e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:24:20,336 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-10-17 17:24:20,404 INFO L276 IsEmpty]: Start isEmpty. Operand has 48902 states, 48837 states have (on average 5.930278272621169) internal successors, (289617), 48901 states have internal predecessors, (289617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:20,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-10-17 17:24:20,404 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:24:20,404 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-10-17 17:24:20,405 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 17:24:20,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:24:20,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1069896, now seen corresponding path program 1 times [2022-10-17 17:24:20,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:24:20,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961418404] [2022-10-17 17:24:20,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:24:20,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:24:20,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:24:20,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:24:20,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:24:20,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961418404] [2022-10-17 17:24:20,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961418404] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:24:20,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:24:20,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:24:20,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022099597] [2022-10-17 17:24:20,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:24:20,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:24:20,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:24:20,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:24:20,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:24:20,498 INFO L87 Difference]: Start difference. First operand has 48902 states, 48837 states have (on average 5.930278272621169) internal successors, (289617), 48901 states have internal predecessors, (289617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)