./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0 --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 99c42ba3d1f6c70520bbcf0a3136609166f98fb21063bda215f7779ff0bb27ca --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 15:05:54,218 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 15:05:54,222 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 15:05:54,283 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 15:05:54,284 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 15:05:54,286 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 15:05:54,288 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 15:05:54,292 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 15:05:54,294 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 15:05:54,295 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 15:05:54,296 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 15:05:54,298 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 15:05:54,299 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 15:05:54,300 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 15:05:54,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 15:05:54,310 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 15:05:54,312 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 15:05:54,314 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 15:05:54,319 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 15:05:54,321 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 15:05:54,324 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 15:05:54,326 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 15:05:54,331 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 15:05:54,332 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 15:05:54,344 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 15:05:54,345 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 15:05:54,345 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 15:05:54,348 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 15:05:54,348 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 15:05:54,350 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 15:05:54,351 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 15:05:54,352 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 15:05:54,354 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 15:05:54,356 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 15:05:54,358 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 15:05:54,358 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 15:05:54,359 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 15:05:54,360 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 15:05:54,360 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 15:05:54,361 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 15:05:54,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 15:05:54,363 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 15:05:54,411 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 15:05:54,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 15:05:54,413 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 15:05:54,413 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 15:05:54,418 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 15:05:54,418 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 15:05:54,418 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 15:05:54,419 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 15:05:54,419 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 15:05:54,419 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 15:05:54,419 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 15:05:54,420 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 15:05:54,420 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 15:05:54,420 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 15:05:54,420 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 15:05:54,421 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 15:05:54,421 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 15:05:54,421 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 15:05:54,421 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 15:05:54,422 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 15:05:54,422 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 15:05:54,422 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 15:05:54,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:05:54,423 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 15:05:54,423 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 15:05:54,423 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 15:05:54,424 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 15:05:54,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 15:05:54,424 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 15:05:54,425 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 15:05:54,425 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 15:05:54,425 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 15:05:54,425 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_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 99c42ba3d1f6c70520bbcf0a3136609166f98fb21063bda215f7779ff0bb27ca [2021-11-22 15:05:54,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 15:05:54,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 15:05:54,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 15:05:54,824 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 15:05:54,825 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 15:05:54,827 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2021-11-22 15:05:54,932 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/data/b24f85f56/0680e26cab5e4e18ad08698c208eff9f/FLAGc4655ce6d [2021-11-22 15:05:55,539 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 15:05:55,540 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2021-11-22 15:05:55,565 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/data/b24f85f56/0680e26cab5e4e18ad08698c208eff9f/FLAGc4655ce6d [2021-11-22 15:05:55,870 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/data/b24f85f56/0680e26cab5e4e18ad08698c208eff9f [2021-11-22 15:05:55,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 15:05:55,875 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 15:05:55,877 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 15:05:55,877 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 15:05:55,884 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 15:05:55,885 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:05:55" (1/1) ... [2021-11-22 15:05:55,886 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6119ea3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:05:55, skipping insertion in model container [2021-11-22 15:05:55,887 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:05:55" (1/1) ... [2021-11-22 15:05:55,897 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 15:05:55,926 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 15:05:56,196 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_76044648-050e-44fb-942b-dd9fea88f8c1/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c[2474,2487] [2021-11-22 15:05:56,216 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:05:56,229 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 15:05:56,284 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_76044648-050e-44fb-942b-dd9fea88f8c1/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c[2474,2487] [2021-11-22 15:05:56,289 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:05:56,313 INFO L208 MainTranslator]: Completed translation [2021-11-22 15:05:56,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:05:56 WrapperNode [2021-11-22 15:05:56,315 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 15:05:56,316 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 15:05:56,317 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 15:05:56,317 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 15:05:56,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:05:56" (1/1) ... [2021-11-22 15:05:56,350 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:05:56" (1/1) ... [2021-11-22 15:05:56,399 INFO L137 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 141 [2021-11-22 15:05:56,400 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 15:05:56,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 15:05:56,401 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 15:05:56,401 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 15:05:56,412 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:05:56" (1/1) ... [2021-11-22 15:05:56,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:05:56" (1/1) ... [2021-11-22 15:05:56,416 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:05:56" (1/1) ... [2021-11-22 15:05:56,416 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:05:56" (1/1) ... [2021-11-22 15:05:56,425 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:05:56" (1/1) ... [2021-11-22 15:05:56,430 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:05:56" (1/1) ... [2021-11-22 15:05:56,432 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:05:56" (1/1) ... [2021-11-22 15:05:56,436 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 15:05:56,437 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 15:05:56,438 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 15:05:56,438 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 15:05:56,439 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:05:56" (1/1) ... [2021-11-22 15:05:56,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:05:56,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:05:56,478 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 15:05:56,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 15:05:56,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 15:05:56,540 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-22 15:05:56,540 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-22 15:05:56,540 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-22 15:05:56,540 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-22 15:05:56,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 15:05:56,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-22 15:05:56,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-22 15:05:56,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-22 15:05:56,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 15:05:56,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 15:05:56,543 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-22 15:05:56,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 15:05:56,546 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-22 15:05:56,714 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 15:05:56,716 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 15:05:57,095 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 15:05:57,108 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 15:05:57,109 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-22 15:05:57,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:05:57 BoogieIcfgContainer [2021-11-22 15:05:57,112 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 15:05:57,116 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 15:05:57,116 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 15:05:57,121 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 15:05:57,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 03:05:55" (1/3) ... [2021-11-22 15:05:57,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d6a8386 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:05:57, skipping insertion in model container [2021-11-22 15:05:57,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:05:56" (2/3) ... [2021-11-22 15:05:57,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d6a8386 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:05:57, skipping insertion in model container [2021-11-22 15:05:57,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:05:57" (3/3) ... [2021-11-22 15:05:57,126 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.c [2021-11-22 15:05:57,133 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-22 15:05:57,133 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 15:05:57,134 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 15:05:57,134 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-22 15:05:57,182 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,185 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,185 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,186 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,186 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,186 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,187 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,187 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,187 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,188 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,189 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,189 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,189 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,190 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,190 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,190 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,191 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,191 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,191 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,192 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,192 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,192 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,193 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,194 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,194 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,196 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,196 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,196 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,197 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,197 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,198 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,198 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,199 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,199 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,200 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,200 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,200 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,201 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,202 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,202 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,203 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,203 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,203 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,204 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,204 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,204 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,205 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,205 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,205 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,206 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,207 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,207 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,207 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,208 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,208 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,208 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,209 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,210 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,210 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,210 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,210 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,211 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,212 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,212 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,213 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,213 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,213 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,214 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,214 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,214 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,215 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,216 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,216 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,216 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,217 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,217 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,218 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,219 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,219 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,219 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,221 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,222 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,223 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,224 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,227 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,228 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,228 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,229 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,231 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,232 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,232 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,233 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,233 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,240 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,242 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,242 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,243 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,244 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,244 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,244 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,245 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,245 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,245 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,246 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,246 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,246 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,246 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,247 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,248 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,248 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,248 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,249 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,249 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,249 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,250 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,250 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,250 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,250 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,251 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,254 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,254 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,255 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,255 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,255 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,256 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,256 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,256 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,257 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,257 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,257 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,257 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,258 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,258 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,258 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,259 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,259 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,267 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,267 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,267 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,268 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,268 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,268 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,268 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,269 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,269 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,270 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,270 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,274 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,275 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,275 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,275 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,276 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,277 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,277 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 15:05:57,285 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-11-22 15:05:57,392 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 15:05:57,408 INFO L339 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=PETRI_NET, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-22 15:05:57,410 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-22 15:05:57,439 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 171 places, 179 transitions, 374 flow [2021-11-22 15:05:57,615 INFO L129 PetriNetUnfolder]: 15/177 cut-off events. [2021-11-22 15:05:57,615 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-22 15:05:57,622 INFO L84 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 177 events. 15/177 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 223 event pairs, 0 based on Foata normal form. 0/161 useless extension candidates. Maximal degree in co-relation 102. Up to 2 conditions per place. [2021-11-22 15:05:57,622 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 179 transitions, 374 flow [2021-11-22 15:05:57,637 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 160 places, 168 transitions, 348 flow [2021-11-22 15:05:57,712 INFO L129 PetriNetUnfolder]: 14/165 cut-off events. [2021-11-22 15:05:57,713 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-22 15:05:57,713 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:05:57,714 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:05:57,715 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 15:05:57,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:05:57,724 INFO L85 PathProgramCache]: Analyzing trace with hash -999352640, now seen corresponding path program 1 times [2021-11-22 15:05:57,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:05:57,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818115746] [2021-11-22 15:05:57,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:57,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:05:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:58,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:05:58,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:05:58,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818115746] [2021-11-22 15:05:58,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818115746] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:05:58,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:05:58,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 15:05:58,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071563332] [2021-11-22 15:05:58,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:05:58,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-22 15:05:58,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:05:58,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-22 15:05:58,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 15:05:58,122 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 179 [2021-11-22 15:05:58,138 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 168 transitions, 348 flow. Second operand has 2 states, 2 states have (on average 165.5) internal successors, (331), 2 states have internal predecessors, (331), 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) [2021-11-22 15:05:58,138 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:05:58,138 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 179 [2021-11-22 15:05:58,140 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:05:58,224 INFO L129 PetriNetUnfolder]: 4/157 cut-off events. [2021-11-22 15:05:58,224 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-11-22 15:05:58,227 INFO L84 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 157 events. 4/157 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 200 event pairs, 0 based on Foata normal form. 14/159 useless extension candidates. Maximal degree in co-relation 97. Up to 5 conditions per place. [2021-11-22 15:05:58,229 INFO L132 encePairwiseOnDemand]: 168/179 looper letters, 4 selfloop transitions, 0 changer transitions 4/157 dead transitions. [2021-11-22 15:05:58,229 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 157 transitions, 334 flow [2021-11-22 15:05:58,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 15:05:58,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-22 15:05:58,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 341 transitions. [2021-11-22 15:05:58,246 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.952513966480447 [2021-11-22 15:05:58,247 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 341 transitions. [2021-11-22 15:05:58,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 341 transitions. [2021-11-22 15:05:58,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:05:58,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 341 transitions. [2021-11-22 15:05:58,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 170.5) internal successors, (341), 2 states have internal predecessors, (341), 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) [2021-11-22 15:05:58,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 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) [2021-11-22 15:05:58,266 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 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) [2021-11-22 15:05:58,273 INFO L186 Difference]: Start difference. First operand has 160 places, 168 transitions, 348 flow. Second operand 2 states and 341 transitions. [2021-11-22 15:05:58,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 157 transitions, 334 flow [2021-11-22 15:05:58,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 157 transitions, 326 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-22 15:05:58,300 INFO L242 Difference]: Finished difference. Result has 157 places, 153 transitions, 310 flow [2021-11-22 15:05:58,303 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=310, PETRI_PLACES=157, PETRI_TRANSITIONS=153} [2021-11-22 15:05:58,311 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, -3 predicate places. [2021-11-22 15:05:58,312 INFO L470 AbstractCegarLoop]: Abstraction has has 157 places, 153 transitions, 310 flow [2021-11-22 15:05:58,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 165.5) internal successors, (331), 2 states have internal predecessors, (331), 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) [2021-11-22 15:05:58,312 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:05:58,313 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:05:58,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 15:05:58,315 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 15:05:58,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:05:58,318 INFO L85 PathProgramCache]: Analyzing trace with hash 2047656499, now seen corresponding path program 1 times [2021-11-22 15:05:58,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:05:58,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183087210] [2021-11-22 15:05:58,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:58,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:05:58,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:58,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:05:58,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:05:58,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183087210] [2021-11-22 15:05:58,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183087210] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:05:58,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:05:58,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 15:05:58,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633561869] [2021-11-22 15:05:58,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:05:58,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:05:58,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:05:58,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:05:58,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:05:58,842 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 179 [2021-11-22 15:05:58,844 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 153 transitions, 310 flow. Second operand has 5 states, 5 states have (on average 147.2) internal successors, (736), 5 states have internal predecessors, (736), 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) [2021-11-22 15:05:58,844 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:05:58,844 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 179 [2021-11-22 15:05:58,844 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:05:59,369 INFO L129 PetriNetUnfolder]: 149/816 cut-off events. [2021-11-22 15:05:59,370 INFO L130 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2021-11-22 15:05:59,392 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1112 conditions, 816 events. 149/816 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 5009 event pairs, 65 based on Foata normal form. 0/719 useless extension candidates. Maximal degree in co-relation 1109. Up to 152 conditions per place. [2021-11-22 15:05:59,398 INFO L132 encePairwiseOnDemand]: 170/179 looper letters, 48 selfloop transitions, 7 changer transitions 0/186 dead transitions. [2021-11-22 15:05:59,399 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 186 transitions, 491 flow [2021-11-22 15:05:59,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:05:59,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-22 15:05:59,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 927 transitions. [2021-11-22 15:05:59,418 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8631284916201117 [2021-11-22 15:05:59,431 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 927 transitions. [2021-11-22 15:05:59,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 927 transitions. [2021-11-22 15:05:59,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:05:59,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 927 transitions. [2021-11-22 15:05:59,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 154.5) internal successors, (927), 6 states have internal predecessors, (927), 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) [2021-11-22 15:05:59,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 179.0) internal successors, (1253), 7 states have internal predecessors, (1253), 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) [2021-11-22 15:05:59,467 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 179.0) internal successors, (1253), 7 states have internal predecessors, (1253), 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) [2021-11-22 15:05:59,467 INFO L186 Difference]: Start difference. First operand has 157 places, 153 transitions, 310 flow. Second operand 6 states and 927 transitions. [2021-11-22 15:05:59,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 186 transitions, 491 flow [2021-11-22 15:05:59,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 186 transitions, 491 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-22 15:05:59,483 INFO L242 Difference]: Finished difference. Result has 161 places, 157 transitions, 352 flow [2021-11-22 15:05:59,483 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=352, PETRI_PLACES=161, PETRI_TRANSITIONS=157} [2021-11-22 15:05:59,484 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 1 predicate places. [2021-11-22 15:05:59,485 INFO L470 AbstractCegarLoop]: Abstraction has has 161 places, 157 transitions, 352 flow [2021-11-22 15:05:59,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.2) internal successors, (736), 5 states have internal predecessors, (736), 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) [2021-11-22 15:05:59,487 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:05:59,487 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:05:59,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 15:05:59,489 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 15:05:59,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:05:59,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1248426905, now seen corresponding path program 2 times [2021-11-22 15:05:59,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:05:59,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856472528] [2021-11-22 15:05:59,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:59,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:05:59,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:05:59,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:05:59,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856472528] [2021-11-22 15:05:59,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856472528] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:05:59,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:05:59,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 15:05:59,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628807259] [2021-11-22 15:05:59,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:05:59,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:05:59,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:05:59,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:05:59,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:05:59,770 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 179 [2021-11-22 15:05:59,775 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 157 transitions, 352 flow. Second operand has 4 states, 4 states have (on average 150.5) internal successors, (602), 4 states have internal predecessors, (602), 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) [2021-11-22 15:05:59,776 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:05:59,776 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 179 [2021-11-22 15:05:59,776 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:06:00,099 INFO L129 PetriNetUnfolder]: 132/851 cut-off events. [2021-11-22 15:06:00,099 INFO L130 PetriNetUnfolder]: For 141/168 co-relation queries the response was YES. [2021-11-22 15:06:00,107 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1260 conditions, 851 events. 132/851 cut-off events. For 141/168 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 5375 event pairs, 61 based on Foata normal form. 34/829 useless extension candidates. Maximal degree in co-relation 1253. Up to 165 conditions per place. [2021-11-22 15:06:00,116 INFO L132 encePairwiseOnDemand]: 173/179 looper letters, 33 selfloop transitions, 8 changer transitions 0/176 dead transitions. [2021-11-22 15:06:00,116 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 176 transitions, 496 flow [2021-11-22 15:06:00,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:06:00,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-11-22 15:06:00,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 629 transitions. [2021-11-22 15:06:00,125 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8784916201117319 [2021-11-22 15:06:00,125 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 629 transitions. [2021-11-22 15:06:00,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 629 transitions. [2021-11-22 15:06:00,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:06:00,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 629 transitions. [2021-11-22 15:06:00,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 157.25) internal successors, (629), 4 states have internal predecessors, (629), 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) [2021-11-22 15:06:00,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 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) [2021-11-22 15:06:00,139 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 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) [2021-11-22 15:06:00,139 INFO L186 Difference]: Start difference. First operand has 161 places, 157 transitions, 352 flow. Second operand 4 states and 629 transitions. [2021-11-22 15:06:00,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 176 transitions, 496 flow [2021-11-22 15:06:00,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 176 transitions, 490 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-11-22 15:06:00,157 INFO L242 Difference]: Finished difference. Result has 164 places, 162 transitions, 398 flow [2021-11-22 15:06:00,157 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=398, PETRI_PLACES=164, PETRI_TRANSITIONS=162} [2021-11-22 15:06:00,161 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 4 predicate places. [2021-11-22 15:06:00,161 INFO L470 AbstractCegarLoop]: Abstraction has has 164 places, 162 transitions, 398 flow [2021-11-22 15:06:00,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 150.5) internal successors, (602), 4 states have internal predecessors, (602), 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) [2021-11-22 15:06:00,162 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:06:00,163 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:06:00,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 15:06:00,164 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 15:06:00,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:06:00,166 INFO L85 PathProgramCache]: Analyzing trace with hash 561552515, now seen corresponding path program 1 times [2021-11-22 15:06:00,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:06:00,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974343856] [2021-11-22 15:06:00,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:06:00,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:06:00,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:06:00,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:06:00,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:06:00,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974343856] [2021-11-22 15:06:00,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974343856] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:06:00,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:06:00,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 15:06:00,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876447270] [2021-11-22 15:06:00,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:06:00,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:06:00,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:06:00,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:06:00,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:06:00,552 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 179 [2021-11-22 15:06:00,554 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 162 transitions, 398 flow. Second operand has 6 states, 6 states have (on average 147.16666666666666) internal successors, (883), 6 states have internal predecessors, (883), 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) [2021-11-22 15:06:00,554 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:06:00,555 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 179 [2021-11-22 15:06:00,555 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:06:00,975 INFO L129 PetriNetUnfolder]: 268/1433 cut-off events. [2021-11-22 15:06:00,975 INFO L130 PetriNetUnfolder]: For 426/440 co-relation queries the response was YES. [2021-11-22 15:06:00,981 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2425 conditions, 1433 events. 268/1433 cut-off events. For 426/440 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 10141 event pairs, 95 based on Foata normal form. 10/1343 useless extension candidates. Maximal degree in co-relation 2416. Up to 263 conditions per place. [2021-11-22 15:06:00,990 INFO L132 encePairwiseOnDemand]: 170/179 looper letters, 69 selfloop transitions, 16 changer transitions 1/217 dead transitions. [2021-11-22 15:06:00,990 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 217 transitions, 802 flow [2021-11-22 15:06:00,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:06:00,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-22 15:06:00,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 943 transitions. [2021-11-22 15:06:00,995 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8780260707635009 [2021-11-22 15:06:00,995 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 943 transitions. [2021-11-22 15:06:00,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 943 transitions. [2021-11-22 15:06:00,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:06:00,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 943 transitions. [2021-11-22 15:06:01,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 157.16666666666666) internal successors, (943), 6 states have internal predecessors, (943), 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) [2021-11-22 15:06:01,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 179.0) internal successors, (1253), 7 states have internal predecessors, (1253), 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) [2021-11-22 15:06:01,006 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 179.0) internal successors, (1253), 7 states have internal predecessors, (1253), 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) [2021-11-22 15:06:01,006 INFO L186 Difference]: Start difference. First operand has 164 places, 162 transitions, 398 flow. Second operand 6 states and 943 transitions. [2021-11-22 15:06:01,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 217 transitions, 802 flow [2021-11-22 15:06:01,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 217 transitions, 802 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-22 15:06:01,016 INFO L242 Difference]: Finished difference. Result has 173 places, 174 transitions, 553 flow [2021-11-22 15:06:01,017 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=553, PETRI_PLACES=173, PETRI_TRANSITIONS=174} [2021-11-22 15:06:01,023 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 13 predicate places. [2021-11-22 15:06:01,024 INFO L470 AbstractCegarLoop]: Abstraction has has 173 places, 174 transitions, 553 flow [2021-11-22 15:06:01,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 147.16666666666666) internal successors, (883), 6 states have internal predecessors, (883), 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) [2021-11-22 15:06:01,026 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:06:01,026 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:06:01,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 15:06:01,027 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 15:06:01,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:06:01,028 INFO L85 PathProgramCache]: Analyzing trace with hash 989028107, now seen corresponding path program 2 times [2021-11-22 15:06:01,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:06:01,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474332219] [2021-11-22 15:06:01,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:06:01,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:06:01,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:06:01,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:06:01,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:06:01,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474332219] [2021-11-22 15:06:01,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474332219] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:06:01,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:06:01,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-22 15:06:01,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71210391] [2021-11-22 15:06:01,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:06:01,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 15:06:01,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:06:01,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 15:06:01,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:06:01,388 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 179 [2021-11-22 15:06:01,390 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 174 transitions, 553 flow. Second operand has 7 states, 7 states have (on average 146.85714285714286) internal successors, (1028), 7 states have internal predecessors, (1028), 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) [2021-11-22 15:06:01,391 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:06:01,391 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 179 [2021-11-22 15:06:01,391 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:06:01,863 INFO L129 PetriNetUnfolder]: 274/1476 cut-off events. [2021-11-22 15:06:01,863 INFO L130 PetriNetUnfolder]: For 1043/1047 co-relation queries the response was YES. [2021-11-22 15:06:01,870 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2825 conditions, 1476 events. 274/1476 cut-off events. For 1043/1047 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 10581 event pairs, 103 based on Foata normal form. 6/1383 useless extension candidates. Maximal degree in co-relation 2811. Up to 292 conditions per place. [2021-11-22 15:06:01,881 INFO L132 encePairwiseOnDemand]: 171/179 looper letters, 63 selfloop transitions, 22 changer transitions 1/217 dead transitions. [2021-11-22 15:06:01,882 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 217 transitions, 945 flow [2021-11-22 15:06:01,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 15:06:01,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-22 15:06:01,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1076 transitions. [2021-11-22 15:06:01,887 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8587390263367917 [2021-11-22 15:06:01,888 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1076 transitions. [2021-11-22 15:06:01,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1076 transitions. [2021-11-22 15:06:01,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:06:01,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1076 transitions. [2021-11-22 15:06:01,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 153.71428571428572) internal successors, (1076), 7 states have internal predecessors, (1076), 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) [2021-11-22 15:06:01,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 179.0) internal successors, (1432), 8 states have internal predecessors, (1432), 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) [2021-11-22 15:06:01,900 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 179.0) internal successors, (1432), 8 states have internal predecessors, (1432), 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) [2021-11-22 15:06:01,900 INFO L186 Difference]: Start difference. First operand has 173 places, 174 transitions, 553 flow. Second operand 7 states and 1076 transitions. [2021-11-22 15:06:01,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 217 transitions, 945 flow [2021-11-22 15:06:01,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 217 transitions, 945 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-22 15:06:01,914 INFO L242 Difference]: Finished difference. Result has 183 places, 179 transitions, 661 flow [2021-11-22 15:06:01,915 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=661, PETRI_PLACES=183, PETRI_TRANSITIONS=179} [2021-11-22 15:06:01,916 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 23 predicate places. [2021-11-22 15:06:01,916 INFO L470 AbstractCegarLoop]: Abstraction has has 183 places, 179 transitions, 661 flow [2021-11-22 15:06:01,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.85714285714286) internal successors, (1028), 7 states have internal predecessors, (1028), 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) [2021-11-22 15:06:01,917 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:06:01,918 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:06:01,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-22 15:06:01,918 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 15:06:01,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:06:01,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1515646687, now seen corresponding path program 3 times [2021-11-22 15:06:01,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:06:01,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986570894] [2021-11-22 15:06:01,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:06:01,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:06:01,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:06:02,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:06:02,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:06:02,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986570894] [2021-11-22 15:06:02,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986570894] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:06:02,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:06:02,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-22 15:06:02,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859804480] [2021-11-22 15:06:02,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:06:02,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 15:06:02,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:06:02,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 15:06:02,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:06:02,103 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 179 [2021-11-22 15:06:02,105 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 179 transitions, 661 flow. Second operand has 7 states, 7 states have (on average 146.85714285714286) internal successors, (1028), 7 states have internal predecessors, (1028), 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) [2021-11-22 15:06:02,105 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:06:02,105 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 179 [2021-11-22 15:06:02,105 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:06:02,601 INFO L129 PetriNetUnfolder]: 274/1435 cut-off events. [2021-11-22 15:06:02,601 INFO L130 PetriNetUnfolder]: For 1929/1929 co-relation queries the response was YES. [2021-11-22 15:06:02,610 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3017 conditions, 1435 events. 274/1435 cut-off events. For 1929/1929 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 10195 event pairs, 105 based on Foata normal form. 3/1339 useless extension candidates. Maximal degree in co-relation 2998. Up to 206 conditions per place. [2021-11-22 15:06:02,621 INFO L132 encePairwiseOnDemand]: 170/179 looper letters, 70 selfloop transitions, 29 changer transitions 1/231 dead transitions. [2021-11-22 15:06:02,622 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 231 transitions, 1152 flow [2021-11-22 15:06:02,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 15:06:02,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-11-22 15:06:02,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1235 transitions. [2021-11-22 15:06:02,628 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8624301675977654 [2021-11-22 15:06:02,628 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1235 transitions. [2021-11-22 15:06:02,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1235 transitions. [2021-11-22 15:06:02,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:06:02,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1235 transitions. [2021-11-22 15:06:02,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 154.375) internal successors, (1235), 8 states have internal predecessors, (1235), 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) [2021-11-22 15:06:02,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 179.0) internal successors, (1611), 9 states have internal predecessors, (1611), 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) [2021-11-22 15:06:02,640 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 179.0) internal successors, (1611), 9 states have internal predecessors, (1611), 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) [2021-11-22 15:06:02,641 INFO L186 Difference]: Start difference. First operand has 183 places, 179 transitions, 661 flow. Second operand 8 states and 1235 transitions. [2021-11-22 15:06:02,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 231 transitions, 1152 flow [2021-11-22 15:06:02,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 231 transitions, 1102 flow, removed 4 selfloop flow, removed 3 redundant places. [2021-11-22 15:06:02,659 INFO L242 Difference]: Finished difference. Result has 190 places, 187 transitions, 787 flow [2021-11-22 15:06:02,660 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=787, PETRI_PLACES=190, PETRI_TRANSITIONS=187} [2021-11-22 15:06:02,661 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 30 predicate places. [2021-11-22 15:06:02,661 INFO L470 AbstractCegarLoop]: Abstraction has has 190 places, 187 transitions, 787 flow [2021-11-22 15:06:02,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.85714285714286) internal successors, (1028), 7 states have internal predecessors, (1028), 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) [2021-11-22 15:06:02,663 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:06:02,663 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:06:02,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-22 15:06:02,664 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 15:06:02,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:06:02,664 INFO L85 PathProgramCache]: Analyzing trace with hash 11227386, now seen corresponding path program 1 times [2021-11-22 15:06:02,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:06:02,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617504302] [2021-11-22 15:06:02,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:06:02,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:06:02,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:06:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:06:02,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:06:02,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617504302] [2021-11-22 15:06:02,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617504302] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:06:02,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:06:02,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-22 15:06:02,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693516517] [2021-11-22 15:06:02,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:06:02,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 15:06:02,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:06:02,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 15:06:02,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-22 15:06:02,830 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 179 [2021-11-22 15:06:02,836 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 187 transitions, 787 flow. Second operand has 8 states, 8 states have (on average 130.75) internal successors, (1046), 8 states have internal predecessors, (1046), 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) [2021-11-22 15:06:02,836 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:06:02,836 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 179 [2021-11-22 15:06:02,836 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:06:03,164 INFO L129 PetriNetUnfolder]: 106/1068 cut-off events. [2021-11-22 15:06:03,164 INFO L130 PetriNetUnfolder]: For 971/1011 co-relation queries the response was YES. [2021-11-22 15:06:03,173 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1838 conditions, 1068 events. 106/1068 cut-off events. For 971/1011 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 7362 event pairs, 36 based on Foata normal form. 10/999 useless extension candidates. Maximal degree in co-relation 1817. Up to 144 conditions per place. [2021-11-22 15:06:03,180 INFO L132 encePairwiseOnDemand]: 171/179 looper letters, 33 selfloop transitions, 7 changer transitions 0/191 dead transitions. [2021-11-22 15:06:03,181 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 191 transitions, 875 flow [2021-11-22 15:06:03,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 15:06:03,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-11-22 15:06:03,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1057 transitions. [2021-11-22 15:06:03,186 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7381284916201117 [2021-11-22 15:06:03,186 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1057 transitions. [2021-11-22 15:06:03,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1057 transitions. [2021-11-22 15:06:03,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:06:03,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1057 transitions. [2021-11-22 15:06:03,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 132.125) internal successors, (1057), 8 states have internal predecessors, (1057), 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) [2021-11-22 15:06:03,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 179.0) internal successors, (1611), 9 states have internal predecessors, (1611), 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) [2021-11-22 15:06:03,197 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 179.0) internal successors, (1611), 9 states have internal predecessors, (1611), 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) [2021-11-22 15:06:03,198 INFO L186 Difference]: Start difference. First operand has 190 places, 187 transitions, 787 flow. Second operand 8 states and 1057 transitions. [2021-11-22 15:06:03,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 191 transitions, 875 flow [2021-11-22 15:06:03,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 191 transitions, 846 flow, removed 9 selfloop flow, removed 2 redundant places. [2021-11-22 15:06:03,212 INFO L242 Difference]: Finished difference. Result has 196 places, 188 transitions, 780 flow [2021-11-22 15:06:03,213 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=780, PETRI_PLACES=196, PETRI_TRANSITIONS=188} [2021-11-22 15:06:03,214 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 36 predicate places. [2021-11-22 15:06:03,214 INFO L470 AbstractCegarLoop]: Abstraction has has 196 places, 188 transitions, 780 flow [2021-11-22 15:06:03,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 130.75) internal successors, (1046), 8 states have internal predecessors, (1046), 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) [2021-11-22 15:06:03,215 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:06:03,216 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:06:03,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-22 15:06:03,216 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 15:06:03,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:06:03,217 INFO L85 PathProgramCache]: Analyzing trace with hash 715964285, now seen corresponding path program 1 times [2021-11-22 15:06:03,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:06:03,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468875141] [2021-11-22 15:06:03,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:06:03,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:06:03,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:06:03,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:06:03,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:06:03,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468875141] [2021-11-22 15:06:03,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468875141] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:06:03,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685090625] [2021-11-22 15:06:03,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:06:03,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:06:03,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:06:03,463 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:06:03,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 15:06:03,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:06:03,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-22 15:06:03,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:06:05,193 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-22 15:06:05,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-11-22 15:06:05,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:06:05,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:06:05,783 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 15:06:05,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 30 [2021-11-22 15:06:08,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:06:08,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685090625] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:06:08,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:06:08,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 18, 19] total 38 [2021-11-22 15:06:08,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345189738] [2021-11-22 15:06:08,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:06:08,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-22 15:06:08,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:06:08,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-22 15:06:08,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1262, Unknown=0, NotChecked=0, Total=1406 [2021-11-22 15:06:08,289 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 179 [2021-11-22 15:06:08,294 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 188 transitions, 780 flow. Second operand has 38 states, 38 states have (on average 79.10526315789474) internal successors, (3006), 38 states have internal predecessors, (3006), 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) [2021-11-22 15:06:08,294 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:06:08,294 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 179 [2021-11-22 15:06:08,294 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:06:19,885 INFO L129 PetriNetUnfolder]: 6079/13224 cut-off events. [2021-11-22 15:06:19,885 INFO L130 PetriNetUnfolder]: For 19143/19143 co-relation queries the response was YES. [2021-11-22 15:06:19,969 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31644 conditions, 13224 events. 6079/13224 cut-off events. For 19143/19143 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 120569 event pairs, 801 based on Foata normal form. 9/12603 useless extension candidates. Maximal degree in co-relation 31621. Up to 2849 conditions per place. [2021-11-22 15:06:20,138 INFO L132 encePairwiseOnDemand]: 133/179 looper letters, 512 selfloop transitions, 105 changer transitions 283/964 dead transitions. [2021-11-22 15:06:20,138 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 964 transitions, 5535 flow [2021-11-22 15:06:20,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-11-22 15:06:20,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-11-22 15:06:20,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 7546 transitions. [2021-11-22 15:06:20,166 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.46325741297808337 [2021-11-22 15:06:20,166 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 7546 transitions. [2021-11-22 15:06:20,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 7546 transitions. [2021-11-22 15:06:20,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:06:20,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 7546 transitions. [2021-11-22 15:06:20,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 82.92307692307692) internal successors, (7546), 91 states have internal predecessors, (7546), 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) [2021-11-22 15:06:20,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 179.0) internal successors, (16468), 92 states have internal predecessors, (16468), 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) [2021-11-22 15:06:20,236 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 179.0) internal successors, (16468), 92 states have internal predecessors, (16468), 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) [2021-11-22 15:06:20,237 INFO L186 Difference]: Start difference. First operand has 196 places, 188 transitions, 780 flow. Second operand 91 states and 7546 transitions. [2021-11-22 15:06:20,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 964 transitions, 5535 flow [2021-11-22 15:06:20,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 964 transitions, 5523 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-11-22 15:06:20,306 INFO L242 Difference]: Finished difference. Result has 340 places, 271 transitions, 1628 flow [2021-11-22 15:06:20,306 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=1628, PETRI_PLACES=340, PETRI_TRANSITIONS=271} [2021-11-22 15:06:20,311 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 180 predicate places. [2021-11-22 15:06:20,311 INFO L470 AbstractCegarLoop]: Abstraction has has 340 places, 271 transitions, 1628 flow [2021-11-22 15:06:20,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 79.10526315789474) internal successors, (3006), 38 states have internal predecessors, (3006), 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) [2021-11-22 15:06:20,331 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:06:20,332 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:06:20,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-22 15:06:20,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:06:20,559 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 15:06:20,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:06:20,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1840390791, now seen corresponding path program 1 times [2021-11-22 15:06:20,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:06:20,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122816895] [2021-11-22 15:06:20,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:06:20,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:06:20,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:06:20,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:06:20,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:06:20,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122816895] [2021-11-22 15:06:20,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122816895] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:06:20,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928777923] [2021-11-22 15:06:20,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:06:20,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:06:20,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:06:20,859 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:06:20,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 15:06:20,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:06:20,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-22 15:06:20,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:06:21,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-22 15:06:21,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:06:21,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:06:21,821 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-11-22 15:06:21,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2021-11-22 15:06:22,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 15:06:22,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928777923] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-22 15:06:22,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:06:22,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15, 15] total 16 [2021-11-22 15:06:22,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879957986] [2021-11-22 15:06:22,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:06:22,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 15:06:22,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:06:22,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 15:06:22,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-11-22 15:06:22,040 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 179 [2021-11-22 15:06:22,042 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 271 transitions, 1628 flow. Second operand has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 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) [2021-11-22 15:06:22,043 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:06:22,043 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 179 [2021-11-22 15:06:22,043 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:06:24,047 INFO L129 PetriNetUnfolder]: 1832/5824 cut-off events. [2021-11-22 15:06:24,047 INFO L130 PetriNetUnfolder]: For 16481/16703 co-relation queries the response was YES. [2021-11-22 15:06:24,143 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16849 conditions, 5824 events. 1832/5824 cut-off events. For 16481/16703 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 53801 event pairs, 339 based on Foata normal form. 32/5651 useless extension candidates. Maximal degree in co-relation 16766. Up to 1102 conditions per place. [2021-11-22 15:06:24,287 INFO L132 encePairwiseOnDemand]: 166/179 looper letters, 117 selfloop transitions, 68 changer transitions 7/382 dead transitions. [2021-11-22 15:06:24,287 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 382 transitions, 2426 flow [2021-11-22 15:06:24,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-22 15:06:24,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-11-22 15:06:24,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2514 transitions. [2021-11-22 15:06:24,293 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7022346368715083 [2021-11-22 15:06:24,294 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2514 transitions. [2021-11-22 15:06:24,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2514 transitions. [2021-11-22 15:06:24,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:06:24,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2514 transitions. [2021-11-22 15:06:24,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 125.7) internal successors, (2514), 20 states have internal predecessors, (2514), 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) [2021-11-22 15:06:24,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 179.0) internal successors, (3759), 21 states have internal predecessors, (3759), 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) [2021-11-22 15:06:24,311 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 179.0) internal successors, (3759), 21 states have internal predecessors, (3759), 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) [2021-11-22 15:06:24,311 INFO L186 Difference]: Start difference. First operand has 340 places, 271 transitions, 1628 flow. Second operand 20 states and 2514 transitions. [2021-11-22 15:06:24,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 382 transitions, 2426 flow [2021-11-22 15:06:24,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 382 transitions, 2202 flow, removed 89 selfloop flow, removed 35 redundant places. [2021-11-22 15:06:24,429 INFO L242 Difference]: Finished difference. Result has 286 places, 317 transitions, 1848 flow [2021-11-22 15:06:24,430 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=1462, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1848, PETRI_PLACES=286, PETRI_TRANSITIONS=317} [2021-11-22 15:06:24,431 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 126 predicate places. [2021-11-22 15:06:24,431 INFO L470 AbstractCegarLoop]: Abstraction has has 286 places, 317 transitions, 1848 flow [2021-11-22 15:06:24,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 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) [2021-11-22 15:06:24,432 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:06:24,433 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:06:24,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-22 15:06:24,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-22 15:06:24,639 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 15:06:24,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:06:24,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1978318625, now seen corresponding path program 2 times [2021-11-22 15:06:24,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:06:24,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325243166] [2021-11-22 15:06:24,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:06:24,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:06:24,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:06:24,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:06:24,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:06:24,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325243166] [2021-11-22 15:06:24,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325243166] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:06:24,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978867083] [2021-11-22 15:06:24,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:06:24,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:06:24,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:06:24,937 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:06:24,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 15:06:25,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:06:25,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:06:25,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-22 15:06:25,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:06:25,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-22 15:06:25,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:06:25,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:06:25,924 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-11-22 15:06:25,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2021-11-22 15:06:26,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 15:06:26,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978867083] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-22 15:06:26,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:06:26,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15, 15] total 16 [2021-11-22 15:06:26,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65411591] [2021-11-22 15:06:26,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:06:26,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 15:06:26,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:06:26,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 15:06:26,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-22 15:06:26,129 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 179 [2021-11-22 15:06:26,192 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 317 transitions, 1848 flow. Second operand has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 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) [2021-11-22 15:06:26,192 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:06:26,193 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 179 [2021-11-22 15:06:26,193 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:06:27,979 INFO L129 PetriNetUnfolder]: 1915/6204 cut-off events. [2021-11-22 15:06:27,979 INFO L130 PetriNetUnfolder]: For 10755/10930 co-relation queries the response was YES. [2021-11-22 15:06:28,047 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17884 conditions, 6204 events. 1915/6204 cut-off events. For 10755/10930 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 58644 event pairs, 407 based on Foata normal form. 53/6026 useless extension candidates. Maximal degree in co-relation 17819. Up to 1383 conditions per place. [2021-11-22 15:06:28,079 INFO L132 encePairwiseOnDemand]: 167/179 looper letters, 138 selfloop transitions, 63 changer transitions 4/395 dead transitions. [2021-11-22 15:06:28,079 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 395 transitions, 2591 flow [2021-11-22 15:06:28,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-22 15:06:28,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-11-22 15:06:28,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1899 transitions. [2021-11-22 15:06:28,083 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7072625698324022 [2021-11-22 15:06:28,084 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1899 transitions. [2021-11-22 15:06:28,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1899 transitions. [2021-11-22 15:06:28,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:06:28,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1899 transitions. [2021-11-22 15:06:28,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 126.6) internal successors, (1899), 15 states have internal predecessors, (1899), 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) [2021-11-22 15:06:28,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 179.0) internal successors, (2864), 16 states have internal predecessors, (2864), 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) [2021-11-22 15:06:28,096 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 179.0) internal successors, (2864), 16 states have internal predecessors, (2864), 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) [2021-11-22 15:06:28,096 INFO L186 Difference]: Start difference. First operand has 286 places, 317 transitions, 1848 flow. Second operand 15 states and 1899 transitions. [2021-11-22 15:06:28,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 395 transitions, 2591 flow [2021-11-22 15:06:28,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 395 transitions, 2561 flow, removed 15 selfloop flow, removed 2 redundant places. [2021-11-22 15:06:28,200 INFO L242 Difference]: Finished difference. Result has 305 places, 340 transitions, 2171 flow [2021-11-22 15:06:28,201 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=1824, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2171, PETRI_PLACES=305, PETRI_TRANSITIONS=340} [2021-11-22 15:06:28,202 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 145 predicate places. [2021-11-22 15:06:28,202 INFO L470 AbstractCegarLoop]: Abstraction has has 305 places, 340 transitions, 2171 flow [2021-11-22 15:06:28,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 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) [2021-11-22 15:06:28,203 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:06:28,203 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:06:28,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-22 15:06:28,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-22 15:06:28,419 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 15:06:28,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:06:28,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1358415567, now seen corresponding path program 3 times [2021-11-22 15:06:28,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:06:28,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935118648] [2021-11-22 15:06:28,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:06:28,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:06:28,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:06:28,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:06:28,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:06:28,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935118648] [2021-11-22 15:06:28,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935118648] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:06:28,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876158673] [2021-11-22 15:06:28,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 15:06:28,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:06:28,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:06:28,753 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:06:28,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 15:06:28,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-22 15:06:28,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:06:28,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-22 15:06:28,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:06:29,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-22 15:06:29,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:06:29,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:06:29,938 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-11-22 15:06:29,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2021-11-22 15:06:30,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 15:06:30,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876158673] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-22 15:06:30,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:06:30,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15, 15] total 17 [2021-11-22 15:06:30,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411836627] [2021-11-22 15:06:30,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:06:30,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 15:06:30,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:06:30,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 15:06:30,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-22 15:06:30,158 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 179 [2021-11-22 15:06:30,160 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 340 transitions, 2171 flow. Second operand has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 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) [2021-11-22 15:06:30,160 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:06:30,160 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 179 [2021-11-22 15:06:30,160 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:06:32,167 INFO L129 PetriNetUnfolder]: 2086/6884 cut-off events. [2021-11-22 15:06:32,167 INFO L130 PetriNetUnfolder]: For 14550/14754 co-relation queries the response was YES. [2021-11-22 15:06:32,239 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21253 conditions, 6884 events. 2086/6884 cut-off events. For 14550/14754 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 67564 event pairs, 335 based on Foata normal form. 45/6685 useless extension candidates. Maximal degree in co-relation 21180. Up to 1297 conditions per place. [2021-11-22 15:06:32,278 INFO L132 encePairwiseOnDemand]: 166/179 looper letters, 156 selfloop transitions, 79 changer transitions 9/434 dead transitions. [2021-11-22 15:06:32,279 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 434 transitions, 3115 flow [2021-11-22 15:06:32,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-22 15:06:32,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-11-22 15:06:32,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1926 transitions. [2021-11-22 15:06:32,283 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.71731843575419 [2021-11-22 15:06:32,283 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1926 transitions. [2021-11-22 15:06:32,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1926 transitions. [2021-11-22 15:06:32,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:06:32,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1926 transitions. [2021-11-22 15:06:32,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 128.4) internal successors, (1926), 15 states have internal predecessors, (1926), 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) [2021-11-22 15:06:32,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 179.0) internal successors, (2864), 16 states have internal predecessors, (2864), 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) [2021-11-22 15:06:32,295 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 179.0) internal successors, (2864), 16 states have internal predecessors, (2864), 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) [2021-11-22 15:06:32,295 INFO L186 Difference]: Start difference. First operand has 305 places, 340 transitions, 2171 flow. Second operand 15 states and 1926 transitions. [2021-11-22 15:06:32,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 434 transitions, 3115 flow [2021-11-22 15:06:32,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 434 transitions, 3071 flow, removed 22 selfloop flow, removed 2 redundant places. [2021-11-22 15:06:32,420 INFO L242 Difference]: Finished difference. Result has 323 places, 359 transitions, 2537 flow [2021-11-22 15:06:32,421 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=2139, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2537, PETRI_PLACES=323, PETRI_TRANSITIONS=359} [2021-11-22 15:06:32,422 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 163 predicate places. [2021-11-22 15:06:32,422 INFO L470 AbstractCegarLoop]: Abstraction has has 323 places, 359 transitions, 2537 flow [2021-11-22 15:06:32,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 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) [2021-11-22 15:06:32,423 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:06:32,424 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:06:32,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 15:06:32,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-22 15:06:32,639 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 15:06:32,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:06:32,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1788832759, now seen corresponding path program 4 times [2021-11-22 15:06:32,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:06:32,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501187787] [2021-11-22 15:06:32,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:06:32,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:06:32,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:06:32,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:06:32,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:06:32,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501187787] [2021-11-22 15:06:32,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501187787] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:06:32,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380483303] [2021-11-22 15:06:32,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 15:06:32,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:06:32,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:06:32,957 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:06:32,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 15:06:33,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 15:06:33,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:06:33,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-22 15:06:33,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:06:33,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-22 15:06:33,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:06:33,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:06:33,956 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-11-22 15:06:33,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2021-11-22 15:06:34,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 15:06:34,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380483303] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-22 15:06:34,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:06:34,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15, 15] total 16 [2021-11-22 15:06:34,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677603888] [2021-11-22 15:06:34,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:06:34,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 15:06:34,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:06:34,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 15:06:34,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-11-22 15:06:34,259 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 179 [2021-11-22 15:06:34,261 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 359 transitions, 2537 flow. Second operand has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 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) [2021-11-22 15:06:34,261 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:06:34,262 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 179 [2021-11-22 15:06:34,262 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:06:36,528 INFO L129 PetriNetUnfolder]: 2106/7034 cut-off events. [2021-11-22 15:06:36,528 INFO L130 PetriNetUnfolder]: For 20264/20480 co-relation queries the response was YES. [2021-11-22 15:06:36,609 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23196 conditions, 7034 events. 2106/7034 cut-off events. For 20264/20480 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 69634 event pairs, 377 based on Foata normal form. 51/6819 useless extension candidates. Maximal degree in co-relation 23116. Up to 1614 conditions per place. [2021-11-22 15:06:36,652 INFO L132 encePairwiseOnDemand]: 166/179 looper letters, 156 selfloop transitions, 72 changer transitions 4/422 dead transitions. [2021-11-22 15:06:36,653 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 422 transitions, 3302 flow [2021-11-22 15:06:36,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-22 15:06:36,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-22 15:06:36,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2260 transitions. [2021-11-22 15:06:36,658 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7014276846679082 [2021-11-22 15:06:36,658 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2260 transitions. [2021-11-22 15:06:36,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2260 transitions. [2021-11-22 15:06:36,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:06:36,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2260 transitions. [2021-11-22 15:06:36,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 125.55555555555556) internal successors, (2260), 18 states have internal predecessors, (2260), 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) [2021-11-22 15:06:36,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 179.0) internal successors, (3401), 19 states have internal predecessors, (3401), 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) [2021-11-22 15:06:36,674 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 179.0) internal successors, (3401), 19 states have internal predecessors, (3401), 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) [2021-11-22 15:06:36,674 INFO L186 Difference]: Start difference. First operand has 323 places, 359 transitions, 2537 flow. Second operand 18 states and 2260 transitions. [2021-11-22 15:06:36,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 422 transitions, 3302 flow [2021-11-22 15:06:36,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 422 transitions, 3146 flow, removed 43 selfloop flow, removed 6 redundant places. [2021-11-22 15:06:36,852 INFO L242 Difference]: Finished difference. Result has 336 places, 365 transitions, 2613 flow [2021-11-22 15:06:36,854 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=2388, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2613, PETRI_PLACES=336, PETRI_TRANSITIONS=365} [2021-11-22 15:06:36,854 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 176 predicate places. [2021-11-22 15:06:36,855 INFO L470 AbstractCegarLoop]: Abstraction has has 336 places, 365 transitions, 2613 flow [2021-11-22 15:06:36,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 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) [2021-11-22 15:06:36,855 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:06:36,856 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:06:36,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 15:06:37,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-22 15:06:37,071 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 15:06:37,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:06:37,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1436265829, now seen corresponding path program 5 times [2021-11-22 15:06:37,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:06:37,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849170220] [2021-11-22 15:06:37,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:06:37,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:06:37,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:06:37,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:06:37,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:06:37,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849170220] [2021-11-22 15:06:37,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849170220] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:06:37,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211241203] [2021-11-22 15:06:37,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 15:06:37,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:06:37,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:06:37,367 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:06:37,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 15:06:37,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:06:37,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:06:37,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-22 15:06:37,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:06:38,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-22 15:06:38,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-22 15:06:38,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-22 15:06:38,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-22 15:06:38,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:06:38,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:07:11,248 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-11-22 15:07:11,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14086 treesize of output 13069 [2021-11-22 15:08:25,838 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-22 15:08:25,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-22 15:08:25,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-22 15:08:25,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869182839] [2021-11-22 15:08:25,839 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-22 15:08:25,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-22 15:08:25,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:08:25,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-22 15:08:25,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=758, Unknown=18, NotChecked=0, Total=992 [2021-11-22 15:08:25,843 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 179 [2021-11-22 15:08:25,845 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 365 transitions, 2613 flow. Second operand has 15 states, 15 states have (on average 112.2) internal successors, (1683), 15 states have internal predecessors, (1683), 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) [2021-11-22 15:08:25,845 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:08:25,845 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 179 [2021-11-22 15:08:25,845 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:08:29,287 INFO L129 PetriNetUnfolder]: 2148/7375 cut-off events. [2021-11-22 15:08:29,287 INFO L130 PetriNetUnfolder]: For 22265/22526 co-relation queries the response was YES. [2021-11-22 15:08:29,367 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24620 conditions, 7375 events. 2148/7375 cut-off events. For 22265/22526 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 74640 event pairs, 439 based on Foata normal form. 75/7169 useless extension candidates. Maximal degree in co-relation 24537. Up to 1882 conditions per place. [2021-11-22 15:08:29,398 INFO L132 encePairwiseOnDemand]: 160/179 looper letters, 170 selfloop transitions, 66 changer transitions 4/421 dead transitions. [2021-11-22 15:08:29,398 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 421 transitions, 3400 flow [2021-11-22 15:08:29,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-22 15:08:29,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-11-22 15:08:29,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2302 transitions. [2021-11-22 15:08:29,403 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6430167597765363 [2021-11-22 15:08:29,403 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2302 transitions. [2021-11-22 15:08:29,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2302 transitions. [2021-11-22 15:08:29,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:08:29,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2302 transitions. [2021-11-22 15:08:29,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 115.1) internal successors, (2302), 20 states have internal predecessors, (2302), 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) [2021-11-22 15:08:29,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 179.0) internal successors, (3759), 21 states have internal predecessors, (3759), 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) [2021-11-22 15:08:29,415 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 179.0) internal successors, (3759), 21 states have internal predecessors, (3759), 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) [2021-11-22 15:08:29,415 INFO L186 Difference]: Start difference. First operand has 336 places, 365 transitions, 2613 flow. Second operand 20 states and 2302 transitions. [2021-11-22 15:08:29,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 421 transitions, 3400 flow [2021-11-22 15:08:29,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 421 transitions, 3295 flow, removed 24 selfloop flow, removed 9 redundant places. [2021-11-22 15:08:29,561 INFO L242 Difference]: Finished difference. Result has 349 places, 374 transitions, 2771 flow [2021-11-22 15:08:29,562 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=2514, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2771, PETRI_PLACES=349, PETRI_TRANSITIONS=374} [2021-11-22 15:08:29,563 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 189 predicate places. [2021-11-22 15:08:29,564 INFO L470 AbstractCegarLoop]: Abstraction has has 349 places, 374 transitions, 2771 flow [2021-11-22 15:08:29,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 112.2) internal successors, (1683), 15 states have internal predecessors, (1683), 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) [2021-11-22 15:08:29,564 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:08:29,565 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:08:29,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-22 15:08:29,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-22 15:08:29,791 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 15:08:29,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:08:29,791 INFO L85 PathProgramCache]: Analyzing trace with hash 749079279, now seen corresponding path program 6 times [2021-11-22 15:08:29,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:08:29,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632995086] [2021-11-22 15:08:29,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:08:29,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:08:29,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:08:30,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:08:30,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:08:30,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632995086] [2021-11-22 15:08:30,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632995086] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:08:30,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128392067] [2021-11-22 15:08:30,036 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 15:08:30,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:08:30,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:08:30,037 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:08:30,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 15:08:30,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-22 15:08:30,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:08:30,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-22 15:08:30,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:08:30,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-22 15:08:30,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:08:30,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:08:30,708 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-11-22 15:08:30,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2021-11-22 15:08:30,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 15:08:30,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128392067] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-22 15:08:30,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:08:30,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15, 15] total 16 [2021-11-22 15:08:30,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524502064] [2021-11-22 15:08:30,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:08:30,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 15:08:30,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:08:30,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 15:08:30,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-22 15:08:30,864 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 179 [2021-11-22 15:08:30,865 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 374 transitions, 2771 flow. Second operand has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 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) [2021-11-22 15:08:30,865 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:08:30,865 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 179 [2021-11-22 15:08:30,866 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:08:32,504 INFO L129 PetriNetUnfolder]: 2173/7469 cut-off events. [2021-11-22 15:08:32,504 INFO L130 PetriNetUnfolder]: For 24957/25222 co-relation queries the response was YES. [2021-11-22 15:08:32,632 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25597 conditions, 7469 events. 2173/7469 cut-off events. For 24957/25222 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 75905 event pairs, 453 based on Foata normal form. 75/7253 useless extension candidates. Maximal degree in co-relation 25510. Up to 1873 conditions per place. [2021-11-22 15:08:32,658 INFO L132 encePairwiseOnDemand]: 167/179 looper letters, 167 selfloop transitions, 68 changer transitions 4/429 dead transitions. [2021-11-22 15:08:32,659 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 429 transitions, 3533 flow [2021-11-22 15:08:32,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-22 15:08:32,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-22 15:08:32,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2250 transitions. [2021-11-22 15:08:32,663 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6983240223463687 [2021-11-22 15:08:32,663 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2250 transitions. [2021-11-22 15:08:32,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2250 transitions. [2021-11-22 15:08:32,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:08:32,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2250 transitions. [2021-11-22 15:08:32,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 125.0) internal successors, (2250), 18 states have internal predecessors, (2250), 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) [2021-11-22 15:08:32,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 179.0) internal successors, (3401), 19 states have internal predecessors, (3401), 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) [2021-11-22 15:08:32,675 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 179.0) internal successors, (3401), 19 states have internal predecessors, (3401), 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) [2021-11-22 15:08:32,675 INFO L186 Difference]: Start difference. First operand has 349 places, 374 transitions, 2771 flow. Second operand 18 states and 2250 transitions. [2021-11-22 15:08:32,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 429 transitions, 3533 flow [2021-11-22 15:08:32,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 429 transitions, 3417 flow, removed 19 selfloop flow, removed 12 redundant places. [2021-11-22 15:08:32,848 INFO L242 Difference]: Finished difference. Result has 355 places, 379 transitions, 2874 flow [2021-11-22 15:08:32,849 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=2662, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2874, PETRI_PLACES=355, PETRI_TRANSITIONS=379} [2021-11-22 15:08:32,850 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 195 predicate places. [2021-11-22 15:08:32,850 INFO L470 AbstractCegarLoop]: Abstraction has has 355 places, 379 transitions, 2874 flow [2021-11-22 15:08:32,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 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) [2021-11-22 15:08:32,851 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:08:32,851 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:08:32,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-22 15:08:33,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:08:33,067 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 15:08:33,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:08:33,067 INFO L85 PathProgramCache]: Analyzing trace with hash 247618565, now seen corresponding path program 7 times [2021-11-22 15:08:33,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:08:33,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642851200] [2021-11-22 15:08:33,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:08:33,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:08:33,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:08:33,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:08:33,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:08:33,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642851200] [2021-11-22 15:08:33,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642851200] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:08:33,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194240113] [2021-11-22 15:08:33,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 15:08:33,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:08:33,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:08:33,394 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:08:33,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-22 15:08:33,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:08:33,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-22 15:08:33,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:08:33,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-22 15:08:33,782 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-22 15:08:33,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-22 15:08:34,199 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-22 15:08:34,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-11-22 15:08:34,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-22 15:08:34,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:08:34,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:08:35,070 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#t2~0#1.offset| Int) (|ULTIMATE.start_main_#t~pre14#1| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base|) |ULTIMATE.start_main_~#t2~0#1.offset| |ULTIMATE.start_main_#t~pre14#1|)) c_~f~0.base) (+ (* c_~x2~0 4) c_~f~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|)) is different from false [2021-11-22 15:08:35,097 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 15:08:35,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 48 [2021-11-22 15:08:35,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-22 15:08:35,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:08:35,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194240113] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:08:35,941 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:08:35,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 26 [2021-11-22 15:08:35,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363622662] [2021-11-22 15:08:35,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:08:35,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-22 15:08:35,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:08:35,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-22 15:08:35,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=519, Unknown=1, NotChecked=46, Total=650 [2021-11-22 15:08:35,946 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 179 [2021-11-22 15:08:35,949 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 379 transitions, 2874 flow. Second operand has 26 states, 26 states have (on average 104.42307692307692) internal successors, (2715), 26 states have internal predecessors, (2715), 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) [2021-11-22 15:08:35,950 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:08:35,950 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 179 [2021-11-22 15:08:35,950 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:08:39,397 INFO L129 PetriNetUnfolder]: 2463/8322 cut-off events. [2021-11-22 15:08:39,397 INFO L130 PetriNetUnfolder]: For 31493/31711 co-relation queries the response was YES. [2021-11-22 15:08:39,554 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29507 conditions, 8322 events. 2463/8322 cut-off events. For 31493/31711 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 86337 event pairs, 452 based on Foata normal form. 48/8055 useless extension candidates. Maximal degree in co-relation 29419. Up to 1524 conditions per place. [2021-11-22 15:08:39,583 INFO L132 encePairwiseOnDemand]: 153/179 looper letters, 187 selfloop transitions, 127 changer transitions 9/499 dead transitions. [2021-11-22 15:08:39,583 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 499 transitions, 4489 flow [2021-11-22 15:08:39,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-22 15:08:39,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-11-22 15:08:39,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2600 transitions. [2021-11-22 15:08:39,588 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6052141527001862 [2021-11-22 15:08:39,588 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2600 transitions. [2021-11-22 15:08:39,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2600 transitions. [2021-11-22 15:08:39,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:08:39,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2600 transitions. [2021-11-22 15:08:39,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 108.33333333333333) internal successors, (2600), 24 states have internal predecessors, (2600), 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) [2021-11-22 15:08:39,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 179.0) internal successors, (4475), 25 states have internal predecessors, (4475), 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) [2021-11-22 15:08:39,601 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 179.0) internal successors, (4475), 25 states have internal predecessors, (4475), 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) [2021-11-22 15:08:39,602 INFO L186 Difference]: Start difference. First operand has 355 places, 379 transitions, 2874 flow. Second operand 24 states and 2600 transitions. [2021-11-22 15:08:39,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 499 transitions, 4489 flow [2021-11-22 15:08:39,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 499 transitions, 4305 flow, removed 35 selfloop flow, removed 12 redundant places. [2021-11-22 15:08:39,783 INFO L242 Difference]: Finished difference. Result has 372 places, 419 transitions, 3609 flow [2021-11-22 15:08:39,783 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=2739, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3609, PETRI_PLACES=372, PETRI_TRANSITIONS=419} [2021-11-22 15:08:39,784 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 212 predicate places. [2021-11-22 15:08:39,784 INFO L470 AbstractCegarLoop]: Abstraction has has 372 places, 419 transitions, 3609 flow [2021-11-22 15:08:39,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 104.42307692307692) internal successors, (2715), 26 states have internal predecessors, (2715), 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) [2021-11-22 15:08:39,784 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:08:39,784 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:08:39,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-22 15:08:39,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:08:39,985 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 15:08:39,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:08:39,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1776757529, now seen corresponding path program 8 times [2021-11-22 15:08:39,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:08:39,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250086380] [2021-11-22 15:08:39,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:08:39,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:08:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:08:40,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:08:40,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:08:40,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250086380] [2021-11-22 15:08:40,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250086380] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:08:40,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929543445] [2021-11-22 15:08:40,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:08:40,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:08:40,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:08:40,272 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:08:40,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-22 15:08:40,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:08:40,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:08:40,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-22 15:08:40,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:08:41,195 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-22 15:08:41,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-11-22 15:08:41,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-22 15:08:41,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:08:41,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:08:42,059 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#t2~0#1.offset| Int) (|ULTIMATE.start_main_#t~pre14#1| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base|) |ULTIMATE.start_main_~#t2~0#1.offset| |ULTIMATE.start_main_#t~pre14#1|)) c_~f~0.base) (+ (* c_~x2~0 4) c_~f~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|)) is different from false [2021-11-22 15:08:42,084 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 15:08:42,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 48 [2021-11-22 15:08:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:08:42,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929543445] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:08:42,579 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:08:42,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 32 [2021-11-22 15:08:42,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842646020] [2021-11-22 15:08:42,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:08:42,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-22 15:08:42,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:08:42,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-22 15:08:42,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=810, Unknown=1, NotChecked=58, Total=992 [2021-11-22 15:08:42,589 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 179 [2021-11-22 15:08:42,592 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 419 transitions, 3609 flow. Second operand has 32 states, 32 states have (on average 103.625) internal successors, (3316), 32 states have internal predecessors, (3316), 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) [2021-11-22 15:08:42,592 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:08:42,592 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 179 [2021-11-22 15:08:42,592 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:08:46,002 INFO L129 PetriNetUnfolder]: 2596/8880 cut-off events. [2021-11-22 15:08:46,003 INFO L130 PetriNetUnfolder]: For 43300/43766 co-relation queries the response was YES. [2021-11-22 15:08:46,159 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34548 conditions, 8880 events. 2596/8880 cut-off events. For 43300/43766 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 93932 event pairs, 585 based on Foata normal form. 58/8577 useless extension candidates. Maximal degree in co-relation 34454. Up to 2361 conditions per place. [2021-11-22 15:08:46,192 INFO L132 encePairwiseOnDemand]: 154/179 looper letters, 219 selfloop transitions, 126 changer transitions 7/527 dead transitions. [2021-11-22 15:08:46,192 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 527 transitions, 5280 flow [2021-11-22 15:08:46,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-22 15:08:46,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-11-22 15:08:46,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2556 transitions. [2021-11-22 15:08:46,196 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5949720670391061 [2021-11-22 15:08:46,196 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2556 transitions. [2021-11-22 15:08:46,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2556 transitions. [2021-11-22 15:08:46,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:08:46,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2556 transitions. [2021-11-22 15:08:46,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 106.5) internal successors, (2556), 24 states have internal predecessors, (2556), 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) [2021-11-22 15:08:46,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 179.0) internal successors, (4475), 25 states have internal predecessors, (4475), 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) [2021-11-22 15:08:46,208 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 179.0) internal successors, (4475), 25 states have internal predecessors, (4475), 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) [2021-11-22 15:08:46,208 INFO L186 Difference]: Start difference. First operand has 372 places, 419 transitions, 3609 flow. Second operand 24 states and 2556 transitions. [2021-11-22 15:08:46,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 527 transitions, 5280 flow [2021-11-22 15:08:46,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 527 transitions, 5043 flow, removed 85 selfloop flow, removed 11 redundant places. [2021-11-22 15:08:46,495 INFO L242 Difference]: Finished difference. Result has 391 places, 464 transitions, 4337 flow [2021-11-22 15:08:46,496 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=3401, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=4337, PETRI_PLACES=391, PETRI_TRANSITIONS=464} [2021-11-22 15:08:46,496 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 231 predicate places. [2021-11-22 15:08:46,496 INFO L470 AbstractCegarLoop]: Abstraction has has 391 places, 464 transitions, 4337 flow [2021-11-22 15:08:46,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 103.625) internal successors, (3316), 32 states have internal predecessors, (3316), 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) [2021-11-22 15:08:46,497 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:08:46,497 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:08:46,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-22 15:08:46,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:08:46,698 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 15:08:46,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:08:46,698 INFO L85 PathProgramCache]: Analyzing trace with hash 623556553, now seen corresponding path program 9 times [2021-11-22 15:08:46,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:08:46,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557211730] [2021-11-22 15:08:46,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:08:46,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:08:46,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:08:47,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:08:47,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:08:47,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557211730] [2021-11-22 15:08:47,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557211730] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:08:47,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510022555] [2021-11-22 15:08:47,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 15:08:47,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:08:47,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:08:47,010 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:08:47,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-22 15:08:47,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-22 15:08:47,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:08:47,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-22 15:08:47,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:08:47,984 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-22 15:08:47,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-11-22 15:08:48,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-22 15:08:48,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:08:48,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:08:49,018 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#t2~0#1.offset| Int) (|ULTIMATE.start_main_#t~pre14#1| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base|) |ULTIMATE.start_main_~#t2~0#1.offset| |ULTIMATE.start_main_#t~pre14#1|)) c_~f~0.base) (+ (* c_~x2~0 4) c_~f~0.offset)) c_~x1~0)) is different from false [2021-11-22 15:08:49,621 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#t2~0#1.offset| Int) (|ULTIMATE.start_main_#t~pre14#1| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base|) |ULTIMATE.start_main_~#t2~0#1.offset| |ULTIMATE.start_main_#t~pre14#1|)) c_~f~0.base) (+ (* c_~x2~0 4) c_~f~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|)) is different from false [2021-11-22 15:08:49,630 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 15:08:49,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 48 [2021-11-22 15:08:50,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:08:50,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510022555] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:08:50,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:08:50,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 34 [2021-11-22 15:08:50,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446359442] [2021-11-22 15:08:50,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:08:50,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-22 15:08:50,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:08:50,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-22 15:08:50,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=870, Unknown=2, NotChecked=122, Total=1122 [2021-11-22 15:08:50,176 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 179 [2021-11-22 15:08:50,179 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 464 transitions, 4337 flow. Second operand has 34 states, 34 states have (on average 103.52941176470588) internal successors, (3520), 34 states have internal predecessors, (3520), 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) [2021-11-22 15:08:50,179 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:08:50,180 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 179 [2021-11-22 15:08:50,180 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:08:54,121 INFO L129 PetriNetUnfolder]: 2994/10182 cut-off events. [2021-11-22 15:08:54,122 INFO L130 PetriNetUnfolder]: For 56725/57604 co-relation queries the response was YES. [2021-11-22 15:08:54,336 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40480 conditions, 10182 events. 2994/10182 cut-off events. For 56725/57604 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 111144 event pairs, 512 based on Foata normal form. 119/9877 useless extension candidates. Maximal degree in co-relation 40378. Up to 2568 conditions per place. [2021-11-22 15:08:54,375 INFO L132 encePairwiseOnDemand]: 152/179 looper letters, 252 selfloop transitions, 138 changer transitions 9/574 dead transitions. [2021-11-22 15:08:54,375 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 574 transitions, 6155 flow [2021-11-22 15:08:54,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-22 15:08:54,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-11-22 15:08:54,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2358 transitions. [2021-11-22 15:08:54,377 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5987811071609954 [2021-11-22 15:08:54,378 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2358 transitions. [2021-11-22 15:08:54,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2358 transitions. [2021-11-22 15:08:54,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:08:54,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2358 transitions. [2021-11-22 15:08:54,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 107.18181818181819) internal successors, (2358), 22 states have internal predecessors, (2358), 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) [2021-11-22 15:08:54,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 179.0) internal successors, (4117), 23 states have internal predecessors, (4117), 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) [2021-11-22 15:08:54,384 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 179.0) internal successors, (4117), 23 states have internal predecessors, (4117), 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) [2021-11-22 15:08:54,384 INFO L186 Difference]: Start difference. First operand has 391 places, 464 transitions, 4337 flow. Second operand 22 states and 2358 transitions. [2021-11-22 15:08:54,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 574 transitions, 6155 flow [2021-11-22 15:08:54,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 574 transitions, 5942 flow, removed 89 selfloop flow, removed 11 redundant places. [2021-11-22 15:08:54,680 INFO L242 Difference]: Finished difference. Result has 408 places, 509 transitions, 5116 flow [2021-11-22 15:08:54,681 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=4166, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5116, PETRI_PLACES=408, PETRI_TRANSITIONS=509} [2021-11-22 15:08:54,681 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 248 predicate places. [2021-11-22 15:08:54,681 INFO L470 AbstractCegarLoop]: Abstraction has has 408 places, 509 transitions, 5116 flow [2021-11-22 15:08:54,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 103.52941176470588) internal successors, (3520), 34 states have internal predecessors, (3520), 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) [2021-11-22 15:08:54,682 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:08:54,682 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:08:54,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-22 15:08:54,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-22 15:08:54,883 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 15:08:54,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:08:54,883 INFO L85 PathProgramCache]: Analyzing trace with hash 2100867469, now seen corresponding path program 10 times [2021-11-22 15:08:54,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:08:54,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984482035] [2021-11-22 15:08:54,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:08:54,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:08:54,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:08:55,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:08:55,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:08:55,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984482035] [2021-11-22 15:08:55,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984482035] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:08:55,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970435609] [2021-11-22 15:08:55,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 15:08:55,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:08:55,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:08:55,211 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:08:55,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-22 15:08:55,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 15:08:55,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:08:55,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-22 15:08:55,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:08:55,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-22 15:08:55,514 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-22 15:08:55,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-22 15:08:55,809 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-22 15:08:55,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-11-22 15:08:55,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-22 15:08:55,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:08:55,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:08:59,417 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 15:08:59,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 48 [2021-11-22 15:09:00,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-22 15:09:00,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 15:09:00,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970435609] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:09:00,147 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:09:00,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 25 [2021-11-22 15:09:00,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451462033] [2021-11-22 15:09:00,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:09:00,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-22 15:09:00,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:09:00,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-22 15:09:00,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=512, Unknown=5, NotChecked=0, Total=600 [2021-11-22 15:09:00,150 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 179 [2021-11-22 15:09:00,151 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 509 transitions, 5116 flow. Second operand has 25 states, 25 states have (on average 104.48) internal successors, (2612), 25 states have internal predecessors, (2612), 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) [2021-11-22 15:09:00,151 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:09:00,152 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 179 [2021-11-22 15:09:00,152 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:09:03,564 INFO L129 PetriNetUnfolder]: 3001/10325 cut-off events. [2021-11-22 15:09:03,564 INFO L130 PetriNetUnfolder]: For 68076/68831 co-relation queries the response was YES. [2021-11-22 15:09:03,790 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45123 conditions, 10325 events. 3001/10325 cut-off events. For 68076/68831 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 113151 event pairs, 519 based on Foata normal form. 212/10120 useless extension candidates. Maximal degree in co-relation 45013. Up to 2752 conditions per place. [2021-11-22 15:09:03,832 INFO L132 encePairwiseOnDemand]: 158/179 looper letters, 264 selfloop transitions, 141 changer transitions 4/585 dead transitions. [2021-11-22 15:09:03,832 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 585 transitions, 6627 flow [2021-11-22 15:09:03,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-22 15:09:03,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-11-22 15:09:03,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2878 transitions. [2021-11-22 15:09:03,834 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.595489344092696 [2021-11-22 15:09:03,835 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2878 transitions. [2021-11-22 15:09:03,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2878 transitions. [2021-11-22 15:09:03,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:09:03,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2878 transitions. [2021-11-22 15:09:03,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 106.5925925925926) internal successors, (2878), 27 states have internal predecessors, (2878), 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) [2021-11-22 15:09:03,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 179.0) internal successors, (5012), 28 states have internal predecessors, (5012), 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) [2021-11-22 15:09:03,843 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 179.0) internal successors, (5012), 28 states have internal predecessors, (5012), 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) [2021-11-22 15:09:03,843 INFO L186 Difference]: Start difference. First operand has 408 places, 509 transitions, 5116 flow. Second operand 27 states and 2878 transitions. [2021-11-22 15:09:03,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 585 transitions, 6627 flow [2021-11-22 15:09:04,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 585 transitions, 6325 flow, removed 80 selfloop flow, removed 13 redundant places. [2021-11-22 15:09:04,226 INFO L242 Difference]: Finished difference. Result has 427 places, 525 transitions, 5439 flow [2021-11-22 15:09:04,227 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=4820, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=5439, PETRI_PLACES=427, PETRI_TRANSITIONS=525} [2021-11-22 15:09:04,227 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 267 predicate places. [2021-11-22 15:09:04,228 INFO L470 AbstractCegarLoop]: Abstraction has has 427 places, 525 transitions, 5439 flow [2021-11-22 15:09:04,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 104.48) internal successors, (2612), 25 states have internal predecessors, (2612), 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) [2021-11-22 15:09:04,228 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:09:04,229 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:09:04,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-22 15:09:04,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-22 15:09:04,436 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 15:09:04,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:09:04,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1988332154, now seen corresponding path program 2 times [2021-11-22 15:09:04,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:09:04,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787985341] [2021-11-22 15:09:04,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:09:04,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:09:04,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:09:04,613 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 15:09:04,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:09:04,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787985341] [2021-11-22 15:09:04,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787985341] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:09:04,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308008138] [2021-11-22 15:09:04,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:09:04,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:09:04,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:09:04,614 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:09:04,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-22 15:09:04,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:09:04,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:09:04,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-22 15:09:04,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:09:05,255 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 15:09:05,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:09:06,017 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 15:09:06,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308008138] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:09:06,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:09:06,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 18 [2021-11-22 15:09:06,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122220808] [2021-11-22 15:09:06,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:09:06,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-22 15:09:06,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:09:06,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-22 15:09:06,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-11-22 15:09:06,021 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2021-11-22 15:09:06,023 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 525 transitions, 5439 flow. Second operand has 18 states, 18 states have (on average 144.83333333333334) internal successors, (2607), 18 states have internal predecessors, (2607), 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) [2021-11-22 15:09:06,023 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:09:06,023 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2021-11-22 15:09:06,023 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:09:08,970 INFO L129 PetriNetUnfolder]: 2308/9020 cut-off events. [2021-11-22 15:09:08,970 INFO L130 PetriNetUnfolder]: For 42547/42917 co-relation queries the response was YES. [2021-11-22 15:09:09,131 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34942 conditions, 9020 events. 2308/9020 cut-off events. For 42547/42917 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 99248 event pairs, 701 based on Foata normal form. 123/8542 useless extension candidates. Maximal degree in co-relation 34825. Up to 1015 conditions per place. [2021-11-22 15:09:09,160 INFO L132 encePairwiseOnDemand]: 166/179 looper letters, 129 selfloop transitions, 62 changer transitions 1/634 dead transitions. [2021-11-22 15:09:09,160 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 634 transitions, 6628 flow [2021-11-22 15:09:09,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-22 15:09:09,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-11-22 15:09:09,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3258 transitions. [2021-11-22 15:09:09,164 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8273235144743525 [2021-11-22 15:09:09,164 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3258 transitions. [2021-11-22 15:09:09,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3258 transitions. [2021-11-22 15:09:09,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:09:09,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3258 transitions. [2021-11-22 15:09:09,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 148.0909090909091) internal successors, (3258), 22 states have internal predecessors, (3258), 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) [2021-11-22 15:09:09,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 179.0) internal successors, (4117), 23 states have internal predecessors, (4117), 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) [2021-11-22 15:09:09,174 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 179.0) internal successors, (4117), 23 states have internal predecessors, (4117), 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) [2021-11-22 15:09:09,174 INFO L186 Difference]: Start difference. First operand has 427 places, 525 transitions, 5439 flow. Second operand 22 states and 3258 transitions. [2021-11-22 15:09:09,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 634 transitions, 6628 flow [2021-11-22 15:09:09,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 634 transitions, 6331 flow, removed 64 selfloop flow, removed 16 redundant places. [2021-11-22 15:09:09,444 INFO L242 Difference]: Finished difference. Result has 438 places, 558 transitions, 5679 flow [2021-11-22 15:09:09,444 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=5142, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5679, PETRI_PLACES=438, PETRI_TRANSITIONS=558} [2021-11-22 15:09:09,445 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 278 predicate places. [2021-11-22 15:09:09,445 INFO L470 AbstractCegarLoop]: Abstraction has has 438 places, 558 transitions, 5679 flow [2021-11-22 15:09:09,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 144.83333333333334) internal successors, (2607), 18 states have internal predecessors, (2607), 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) [2021-11-22 15:09:09,446 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:09:09,446 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:09:09,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-22 15:09:09,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:09:09,647 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 15:09:09,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:09:09,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1782922192, now seen corresponding path program 3 times [2021-11-22 15:09:09,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:09:09,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128194857] [2021-11-22 15:09:09,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:09:09,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:09:09,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:09:09,849 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 15:09:09,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:09:09,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128194857] [2021-11-22 15:09:09,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128194857] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:09:09,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770646247] [2021-11-22 15:09:09,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 15:09:09,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:09:09,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:09:09,851 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:09:09,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-22 15:09:10,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-22 15:09:10,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:09:10,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-22 15:09:10,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:09:10,534 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 15:09:10,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:09:11,089 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 15:09:11,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770646247] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:09:11,090 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:09:11,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2021-11-22 15:09:11,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450797180] [2021-11-22 15:09:11,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:09:11,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-22 15:09:11,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:09:11,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-22 15:09:11,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-11-22 15:09:11,094 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2021-11-22 15:09:11,096 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 558 transitions, 5679 flow. Second operand has 19 states, 19 states have (on average 144.73684210526315) internal successors, (2750), 19 states have internal predecessors, (2750), 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) [2021-11-22 15:09:11,096 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:09:11,096 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2021-11-22 15:09:11,096 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:09:19,871 INFO L129 PetriNetUnfolder]: 4187/16945 cut-off events. [2021-11-22 15:09:19,871 INFO L130 PetriNetUnfolder]: For 85714/86287 co-relation queries the response was YES. [2021-11-22 15:09:20,341 INFO L84 FinitePrefix]: Finished finitePrefix Result has 67934 conditions, 16945 events. 4187/16945 cut-off events. For 85714/86287 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 210684 event pairs, 1091 based on Foata normal form. 164/15963 useless extension candidates. Maximal degree in co-relation 67811. Up to 1789 conditions per place. [2021-11-22 15:09:20,409 INFO L132 encePairwiseOnDemand]: 164/179 looper letters, 228 selfloop transitions, 273 changer transitions 0/943 dead transitions. [2021-11-22 15:09:20,409 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 943 transitions, 9789 flow [2021-11-22 15:09:20,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-22 15:09:20,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-11-22 15:09:20,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 10366 transitions. [2021-11-22 15:09:20,421 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8272944932162809 [2021-11-22 15:09:20,421 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 10366 transitions. [2021-11-22 15:09:20,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 10366 transitions. [2021-11-22 15:09:20,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:09:20,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 10366 transitions. [2021-11-22 15:09:20,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 148.0857142857143) internal successors, (10366), 70 states have internal predecessors, (10366), 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) [2021-11-22 15:09:20,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 179.0) internal successors, (12709), 71 states have internal predecessors, (12709), 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) [2021-11-22 15:09:20,455 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 179.0) internal successors, (12709), 71 states have internal predecessors, (12709), 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) [2021-11-22 15:09:20,455 INFO L186 Difference]: Start difference. First operand has 438 places, 558 transitions, 5679 flow. Second operand 70 states and 10366 transitions. [2021-11-22 15:09:20,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 943 transitions, 9789 flow [2021-11-22 15:09:21,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 943 transitions, 9489 flow, removed 123 selfloop flow, removed 2 redundant places. [2021-11-22 15:09:21,170 INFO L242 Difference]: Finished difference. Result has 531 places, 788 transitions, 8544 flow [2021-11-22 15:09:21,171 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=5555, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=8544, PETRI_PLACES=531, PETRI_TRANSITIONS=788} [2021-11-22 15:09:21,171 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 371 predicate places. [2021-11-22 15:09:21,172 INFO L470 AbstractCegarLoop]: Abstraction has has 531 places, 788 transitions, 8544 flow [2021-11-22 15:09:21,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 144.73684210526315) internal successors, (2750), 19 states have internal predecessors, (2750), 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) [2021-11-22 15:09:21,172 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:09:21,173 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:09:21,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-22 15:09:21,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:09:21,391 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 15:09:21,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:09:21,391 INFO L85 PathProgramCache]: Analyzing trace with hash 9074186, now seen corresponding path program 4 times [2021-11-22 15:09:21,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:09:21,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354637366] [2021-11-22 15:09:21,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:09:21,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:09:21,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:09:21,567 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 15:09:21,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:09:21,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354637366] [2021-11-22 15:09:21,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354637366] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:09:21,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969857445] [2021-11-22 15:09:21,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 15:09:21,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:09:21,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:09:21,569 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:09:21,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-22 15:09:21,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 15:09:21,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:09:21,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-22 15:09:21,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:09:22,115 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 15:09:22,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:09:22,615 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 15:09:22,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969857445] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:09:22,615 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:09:22,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2021-11-22 15:09:22,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355444552] [2021-11-22 15:09:22,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:09:22,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-22 15:09:22,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:09:22,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-22 15:09:22,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-11-22 15:09:22,619 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2021-11-22 15:09:22,621 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 788 transitions, 8544 flow. Second operand has 25 states, 25 states have (on average 144.64) internal successors, (3616), 25 states have internal predecessors, (3616), 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) [2021-11-22 15:09:22,621 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:09:22,621 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2021-11-22 15:09:22,621 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:09:31,651 INFO L129 PetriNetUnfolder]: 5187/21992 cut-off events. [2021-11-22 15:09:31,652 INFO L130 PetriNetUnfolder]: For 142963/143660 co-relation queries the response was YES. [2021-11-22 15:09:32,296 INFO L84 FinitePrefix]: Finished finitePrefix Result has 93534 conditions, 21992 events. 5187/21992 cut-off events. For 142963/143660 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 288684 event pairs, 1478 based on Foata normal form. 212/20790 useless extension candidates. Maximal degree in co-relation 93387. Up to 2220 conditions per place. [2021-11-22 15:09:32,380 INFO L132 encePairwiseOnDemand]: 163/179 looper letters, 271 selfloop transitions, 390 changer transitions 0/1103 dead transitions. [2021-11-22 15:09:32,381 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 1103 transitions, 13585 flow [2021-11-22 15:09:32,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-22 15:09:32,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-11-22 15:09:32,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 5835 transitions. [2021-11-22 15:09:32,387 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8358401375161152 [2021-11-22 15:09:32,388 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 5835 transitions. [2021-11-22 15:09:32,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 5835 transitions. [2021-11-22 15:09:32,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:09:32,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 5835 transitions. [2021-11-22 15:09:32,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 149.6153846153846) internal successors, (5835), 39 states have internal predecessors, (5835), 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) [2021-11-22 15:09:32,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 179.0) internal successors, (7160), 40 states have internal predecessors, (7160), 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) [2021-11-22 15:09:32,408 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 179.0) internal successors, (7160), 40 states have internal predecessors, (7160), 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) [2021-11-22 15:09:32,408 INFO L186 Difference]: Start difference. First operand has 531 places, 788 transitions, 8544 flow. Second operand 39 states and 5835 transitions. [2021-11-22 15:09:32,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 1103 transitions, 13585 flow [2021-11-22 15:09:33,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 568 places, 1103 transitions, 12483 flow, removed 539 selfloop flow, removed 1 redundant places. [2021-11-22 15:09:33,851 INFO L242 Difference]: Finished difference. Result has 587 places, 947 transitions, 11031 flow [2021-11-22 15:09:33,851 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=7959, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=788, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=11031, PETRI_PLACES=587, PETRI_TRANSITIONS=947} [2021-11-22 15:09:33,852 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 427 predicate places. [2021-11-22 15:09:33,852 INFO L470 AbstractCegarLoop]: Abstraction has has 587 places, 947 transitions, 11031 flow [2021-11-22 15:09:33,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 144.64) internal successors, (3616), 25 states have internal predecessors, (3616), 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) [2021-11-22 15:09:33,853 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:09:33,853 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:09:33,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-22 15:09:34,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:09:34,054 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 15:09:34,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:09:34,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1674111406, now seen corresponding path program 5 times [2021-11-22 15:09:34,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:09:34,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231480266] [2021-11-22 15:09:34,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:09:34,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:09:34,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:09:34,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 15:09:34,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:09:34,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231480266] [2021-11-22 15:09:34,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231480266] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:09:34,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955226680] [2021-11-22 15:09:34,290 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 15:09:34,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:09:34,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:09:34,291 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:09:34,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-22 15:09:34,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-22 15:09:34,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:09:34,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-22 15:09:34,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:09:35,007 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 15:09:35,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:09:35,521 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 15:09:35,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955226680] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:09:35,522 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:09:35,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2021-11-22 15:09:35,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604908194] [2021-11-22 15:09:35,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:09:35,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-22 15:09:35,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:09:35,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-22 15:09:35,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-11-22 15:09:35,525 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2021-11-22 15:09:35,527 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 587 places, 947 transitions, 11031 flow. Second operand has 20 states, 20 states have (on average 144.75) internal successors, (2895), 20 states have internal predecessors, (2895), 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) [2021-11-22 15:09:35,527 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:09:35,527 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2021-11-22 15:09:35,527 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 15:09:48,937 INFO L129 PetriNetUnfolder]: 5385/22721 cut-off events. [2021-11-22 15:09:48,937 INFO L130 PetriNetUnfolder]: For 162249/163047 co-relation queries the response was YES. [2021-11-22 15:09:49,696 INFO L84 FinitePrefix]: Finished finitePrefix Result has 98988 conditions, 22721 events. 5385/22721 cut-off events. For 162249/163047 co-relation queries the response was YES. Maximal size of possible extension queue 763. Compared 297817 event pairs, 1483 based on Foata normal form. 256/21534 useless extension candidates. Maximal degree in co-relation 98823. Up to 2283 conditions per place. [2021-11-22 15:09:49,787 INFO L132 encePairwiseOnDemand]: 164/179 looper letters, 243 selfloop transitions, 461 changer transitions 0/1146 dead transitions. [2021-11-22 15:09:49,787 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 654 places, 1146 transitions, 14580 flow [2021-11-22 15:09:49,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-22 15:09:49,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-11-22 15:09:49,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 10075 transitions. [2021-11-22 15:09:49,796 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8277193558987841 [2021-11-22 15:09:49,797 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 10075 transitions. [2021-11-22 15:09:49,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 10075 transitions. [2021-11-22 15:09:49,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 15:09:49,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 10075 transitions. [2021-11-22 15:09:49,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 148.16176470588235) internal successors, (10075), 68 states have internal predecessors, (10075), 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) [2021-11-22 15:09:49,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 179.0) internal successors, (12351), 69 states have internal predecessors, (12351), 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) [2021-11-22 15:09:49,828 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 179.0) internal successors, (12351), 69 states have internal predecessors, (12351), 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) [2021-11-22 15:09:49,828 INFO L186 Difference]: Start difference. First operand has 587 places, 947 transitions, 11031 flow. Second operand 68 states and 10075 transitions. [2021-11-22 15:09:49,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 654 places, 1146 transitions, 14580 flow [2021-11-22 15:09:51,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 650 places, 1146 transitions, 14156 flow, removed 180 selfloop flow, removed 4 redundant places. [2021-11-22 15:09:51,642 INFO L242 Difference]: Finished difference. Result has 660 places, 1000 transitions, 12763 flow [2021-11-22 15:09:51,643 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=10711, PETRI_DIFFERENCE_MINUEND_PLACES=583, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=947, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=414, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=12763, PETRI_PLACES=660, PETRI_TRANSITIONS=1000} [2021-11-22 15:09:51,643 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 500 predicate places. [2021-11-22 15:09:51,643 INFO L470 AbstractCegarLoop]: Abstraction has has 660 places, 1000 transitions, 12763 flow [2021-11-22 15:09:51,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 144.75) internal successors, (2895), 20 states have internal predecessors, (2895), 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) [2021-11-22 15:09:51,644 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 15:09:51,644 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:09:51,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-22 15:09:51,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:09:51,846 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 15:09:51,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:09:51,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1328439012, now seen corresponding path program 6 times [2021-11-22 15:09:51,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:09:51,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018878960] [2021-11-22 15:09:51,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:09:51,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:09:51,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:09:52,032 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 15:09:52,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:09:52,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018878960] [2021-11-22 15:09:52,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018878960] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:09:52,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119064271] [2021-11-22 15:09:52,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 15:09:52,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:09:52,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:09:52,035 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:09:52,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76044648-050e-44fb-942b-dd9fea88f8c1/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-22 15:09:52,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-22 15:09:52,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:09:52,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-22 15:09:52,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:09:52,643 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 15:09:52,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:09:53,136 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 15:09:53,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119064271] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:09:53,137 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:09:53,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2021-11-22 15:09:53,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729617751] [2021-11-22 15:09:53,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:09:53,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-22 15:09:53,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:09:53,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-22 15:09:53,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-11-22 15:09:53,141 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2021-11-22 15:09:53,144 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 660 places, 1000 transitions, 12763 flow. Second operand has 19 states, 19 states have (on average 144.73684210526315) internal successors, (2750), 19 states have internal predecessors, (2750), 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) [2021-11-22 15:09:53,144 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 15:09:53,144 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2021-11-22 15:09:53,144 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand