./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be --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 b585114ab4aff9777d36c84f93f7abe0931f77338421f004296c8a8d328d3dfd ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:09:55,230 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:09:55,233 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:09:55,287 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:09:55,288 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:09:55,289 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:09:55,291 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:09:55,293 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:09:55,296 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:09:55,297 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:09:55,298 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:09:55,300 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:09:55,301 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:09:55,302 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:09:55,304 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:09:55,305 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:09:55,307 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:09:55,308 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:09:55,311 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:09:55,313 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:09:55,315 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:09:55,317 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:09:55,319 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:09:55,320 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:09:55,324 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:09:55,325 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:09:55,325 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:09:55,327 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:09:55,327 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:09:55,329 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:09:55,329 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:09:55,330 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:09:55,331 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:09:55,332 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:09:55,334 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:09:55,334 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:09:55,335 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:09:55,336 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:09:55,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:09:55,337 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:09:55,338 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:09:55,339 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 19:09:55,362 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:09:55,362 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:09:55,363 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:09:55,363 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:09:55,364 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:09:55,364 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:09:55,365 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:09:55,365 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:09:55,365 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:09:55,365 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:09:55,366 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:09:55,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:09:55,366 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 19:09:55,366 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:09:55,367 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 19:09:55,367 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:09:55,367 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 19:09:55,367 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:09:55,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 19:09:55,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:09:55,368 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:09:55,368 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:09:55,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:09:55,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:09:55,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:09:55,369 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 19:09:55,370 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:09:55,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:09:55,370 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 19:09:55,370 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 19:09:55,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 19:09:55,371 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:09:55,371 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_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b585114ab4aff9777d36c84f93f7abe0931f77338421f004296c8a8d328d3dfd [2021-10-21 19:09:55,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:09:55,657 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:09:55,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:09:55,662 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:09:55,663 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:09:55,664 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/pthread/triangular-1.i [2021-10-21 19:09:55,768 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/data/ef871ce97/ce2338296e0f4f72831f64e082eb5865/FLAGef2301955 [2021-10-21 19:09:56,325 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:09:56,326 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/sv-benchmarks/c/pthread/triangular-1.i [2021-10-21 19:09:56,360 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/data/ef871ce97/ce2338296e0f4f72831f64e082eb5865/FLAGef2301955 [2021-10-21 19:09:56,760 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/data/ef871ce97/ce2338296e0f4f72831f64e082eb5865 [2021-10-21 19:09:56,762 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:09:56,763 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 19:09:56,765 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:09:56,765 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:09:56,772 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:09:56,773 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:09:56" (1/1) ... [2021-10-21 19:09:56,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f217ceb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:09:56, skipping insertion in model container [2021-10-21 19:09:56,775 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:09:56" (1/1) ... [2021-10-21 19:09:56,781 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:09:56,826 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:09:57,326 WARN L228 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_af070303-dffe-4cad-bbab-bdf61581d0e8/sv-benchmarks/c/pthread/triangular-1.i[30950,30963] [2021-10-21 19:09:57,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:09:57,338 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:09:57,406 WARN L228 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_af070303-dffe-4cad-bbab-bdf61581d0e8/sv-benchmarks/c/pthread/triangular-1.i[30950,30963] [2021-10-21 19:09:57,409 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:09:57,463 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:09:57,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:09:57 WrapperNode [2021-10-21 19:09:57,464 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:09:57,465 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 19:09:57,466 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 19:09:57,466 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 19:09:57,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:09:57" (1/1) ... [2021-10-21 19:09:57,508 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:09:57" (1/1) ... [2021-10-21 19:09:57,535 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 19:09:57,536 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:09:57,536 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:09:57,536 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:09:57,545 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:09:57" (1/1) ... [2021-10-21 19:09:57,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:09:57" (1/1) ... [2021-10-21 19:09:57,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:09:57" (1/1) ... [2021-10-21 19:09:57,552 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:09:57" (1/1) ... [2021-10-21 19:09:57,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:09:57" (1/1) ... [2021-10-21 19:09:57,581 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:09:57" (1/1) ... [2021-10-21 19:09:57,583 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:09:57" (1/1) ... [2021-10-21 19:09:57,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:09:57,589 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:09:57,589 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:09:57,590 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:09:57,595 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:09:57" (1/1) ... [2021-10-21 19:09:57,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:09:57,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:09:57,621 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:09:57,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:09:57,662 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-10-21 19:09:57,663 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-10-21 19:09:57,663 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-10-21 19:09:57,663 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-10-21 19:09:57,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 19:09:57,664 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-21 19:09:57,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:09:57,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:09:57,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:09:57,665 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-21 19:09:57,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:09:57,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:09:57,667 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-21 19:09:57,926 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:09:57,926 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-21 19:09:57,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:09:57 BoogieIcfgContainer [2021-10-21 19:09:57,929 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:09:57,930 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:09:57,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:09:57,934 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:09:57,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:09:56" (1/3) ... [2021-10-21 19:09:57,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52663562 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:09:57, skipping insertion in model container [2021-10-21 19:09:57,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:09:57" (2/3) ... [2021-10-21 19:09:57,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52663562 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:09:57, skipping insertion in model container [2021-10-21 19:09:57,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:09:57" (3/3) ... [2021-10-21 19:09:57,937 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2021-10-21 19:09:57,947 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-21 19:09:57,947 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:09:57,947 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-21 19:09:57,947 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-21 19:09:58,011 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,012 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,012 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,012 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,012 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,013 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,013 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,013 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,013 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,014 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,014 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,014 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,015 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,015 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,015 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,015 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,016 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,016 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,017 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,017 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,017 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,017 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,017 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,018 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,018 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,018 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,018 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,019 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,019 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,019 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,020 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,020 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,020 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,020 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,020 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,021 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,021 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,021 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,022 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,022 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,022 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,022 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,023 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,023 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,023 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,023 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,024 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,024 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,024 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,025 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,025 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,025 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,025 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,026 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,026 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,030 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,034 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,035 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,035 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,037 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,045 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,045 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,063 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,064 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,064 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,064 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,064 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,065 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-21 19:09:58,068 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-10-21 19:09:58,116 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:09:58,123 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 [2021-10-21 19:09:58,123 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-21 19:09:58,135 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 68 places, 66 transitions, 142 flow [2021-10-21 19:09:58,172 INFO L129 PetriNetUnfolder]: 5/64 cut-off events. [2021-10-21 19:09:58,172 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-21 19:09:58,181 INFO L84 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 5/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2021-10-21 19:09:58,182 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 66 transitions, 142 flow [2021-10-21 19:09:58,190 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 64 transitions, 134 flow [2021-10-21 19:09:58,216 INFO L129 PetriNetUnfolder]: 3/52 cut-off events. [2021-10-21 19:09:58,217 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-21 19:09:58,217 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:09:58,217 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] [2021-10-21 19:09:58,218 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 19:09:58,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:09:58,223 INFO L82 PathProgramCache]: Analyzing trace with hash 2112281486, now seen corresponding path program 1 times [2021-10-21 19:09:58,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:09:58,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528528754] [2021-10-21 19:09:58,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:09:58,234 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:09:58,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:58,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:09:58,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:09:58,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528528754] [2021-10-21 19:09:58,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528528754] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:09:58,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:09:58,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 19:09:58,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609581858] [2021-10-21 19:09:58,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:09:58,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:09:58,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:09:58,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:09:58,680 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-21 19:09:58,684 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 54.0) internal successors, (324), 6 states have internal predecessors, (324), 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) [2021-10-21 19:09:58,684 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:09:58,685 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-21 19:09:58,686 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:09:58,832 INFO L129 PetriNetUnfolder]: 44/194 cut-off events. [2021-10-21 19:09:58,833 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-21 19:09:58,835 INFO L84 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 194 events. 44/194 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 723 event pairs, 3 based on Foata normal form. 47/223 useless extension candidates. Maximal degree in co-relation 243. Up to 29 conditions per place. [2021-10-21 19:09:58,837 INFO L132 encePairwiseOnDemand]: 55/66 looper letters, 11 selfloop transitions, 9 changer transitions 23/87 dead transitions. [2021-10-21 19:09:58,837 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 87 transitions, 252 flow [2021-10-21 19:09:58,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:09:58,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-21 19:09:58,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 590 transitions. [2021-10-21 19:09:58,854 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8939393939393939 [2021-10-21 19:09:58,855 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 590 transitions. [2021-10-21 19:09:58,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 590 transitions. [2021-10-21 19:09:58,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:09:58,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 590 transitions. [2021-10-21 19:09:58,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 59.0) internal successors, (590), 10 states have internal predecessors, (590), 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) [2021-10-21 19:09:58,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 66.0) internal successors, (726), 11 states have internal predecessors, (726), 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) [2021-10-21 19:09:58,875 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 66.0) internal successors, (726), 11 states have internal predecessors, (726), 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) [2021-10-21 19:09:58,877 INFO L186 Difference]: Start difference. First operand has 66 places, 64 transitions, 134 flow. Second operand 10 states and 590 transitions. [2021-10-21 19:09:58,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 87 transitions, 252 flow [2021-10-21 19:09:58,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 87 transitions, 250 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-21 19:09:58,885 INFO L242 Difference]: Finished difference. Result has 79 places, 61 transitions, 175 flow [2021-10-21 19:09:58,887 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=175, PETRI_PLACES=79, PETRI_TRANSITIONS=61} [2021-10-21 19:09:58,888 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 13 predicate places. [2021-10-21 19:09:58,888 INFO L470 AbstractCegarLoop]: Abstraction has has 79 places, 61 transitions, 175 flow [2021-10-21 19:09:58,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.0) internal successors, (324), 6 states have internal predecessors, (324), 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) [2021-10-21 19:09:58,889 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:09:58,889 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] [2021-10-21 19:09:58,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:09:58,890 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 19:09:58,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:09:58,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1447548911, now seen corresponding path program 1 times [2021-10-21 19:09:58,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:09:58,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501593436] [2021-10-21 19:09:58,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:09:58,892 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:09:58,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:59,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:09:59,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:09:59,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501593436] [2021-10-21 19:09:59,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501593436] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:09:59,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:09:59,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 19:09:59,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388377304] [2021-10-21 19:09:59,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:09:59,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:09:59,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:09:59,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:09:59,037 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-21 19:09:59,037 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 61 transitions, 175 flow. Second operand has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 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) [2021-10-21 19:09:59,038 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:09:59,038 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-21 19:09:59,038 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:09:59,143 INFO L129 PetriNetUnfolder]: 25/130 cut-off events. [2021-10-21 19:09:59,143 INFO L130 PetriNetUnfolder]: For 64/72 co-relation queries the response was YES. [2021-10-21 19:09:59,145 INFO L84 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 130 events. 25/130 cut-off events. For 64/72 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 343 event pairs, 0 based on Foata normal form. 7/124 useless extension candidates. Maximal degree in co-relation 206. Up to 29 conditions per place. [2021-10-21 19:09:59,146 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 13 selfloop transitions, 9 changer transitions 5/71 dead transitions. [2021-10-21 19:09:59,146 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 71 transitions, 271 flow [2021-10-21 19:09:59,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:09:59,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-21 19:09:59,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 394 transitions. [2021-10-21 19:09:59,149 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8528138528138528 [2021-10-21 19:09:59,149 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 394 transitions. [2021-10-21 19:09:59,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 394 transitions. [2021-10-21 19:09:59,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:09:59,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 394 transitions. [2021-10-21 19:09:59,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 56.285714285714285) internal successors, (394), 7 states have internal predecessors, (394), 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) [2021-10-21 19:09:59,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 66.0) internal successors, (528), 8 states have internal predecessors, (528), 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) [2021-10-21 19:09:59,154 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 66.0) internal successors, (528), 8 states have internal predecessors, (528), 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) [2021-10-21 19:09:59,155 INFO L186 Difference]: Start difference. First operand has 79 places, 61 transitions, 175 flow. Second operand 7 states and 394 transitions. [2021-10-21 19:09:59,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 71 transitions, 271 flow [2021-10-21 19:09:59,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 71 transitions, 263 flow, removed 4 selfloop flow, removed 4 redundant places. [2021-10-21 19:09:59,159 INFO L242 Difference]: Finished difference. Result has 73 places, 64 transitions, 214 flow [2021-10-21 19:09:59,160 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=214, PETRI_PLACES=73, PETRI_TRANSITIONS=64} [2021-10-21 19:09:59,160 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 7 predicate places. [2021-10-21 19:09:59,160 INFO L470 AbstractCegarLoop]: Abstraction has has 73 places, 64 transitions, 214 flow [2021-10-21 19:09:59,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 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) [2021-10-21 19:09:59,161 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:09:59,161 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] [2021-10-21 19:09:59,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:09:59,162 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 19:09:59,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:09:59,163 INFO L82 PathProgramCache]: Analyzing trace with hash 263941995, now seen corresponding path program 1 times [2021-10-21 19:09:59,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:09:59,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829569616] [2021-10-21 19:09:59,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:09:59,164 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:09:59,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:59,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:09:59,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:09:59,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829569616] [2021-10-21 19:09:59,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829569616] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:09:59,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:09:59,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 19:09:59,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400677359] [2021-10-21 19:09:59,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:09:59,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:09:59,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:09:59,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:09:59,328 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-21 19:09:59,329 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 64 transitions, 214 flow. Second operand has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 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) [2021-10-21 19:09:59,329 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:09:59,330 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-21 19:09:59,330 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:09:59,429 INFO L129 PetriNetUnfolder]: 35/182 cut-off events. [2021-10-21 19:09:59,429 INFO L130 PetriNetUnfolder]: For 116/133 co-relation queries the response was YES. [2021-10-21 19:09:59,431 INFO L84 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 182 events. 35/182 cut-off events. For 116/133 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 584 event pairs, 0 based on Foata normal form. 20/185 useless extension candidates. Maximal degree in co-relation 317. Up to 33 conditions per place. [2021-10-21 19:09:59,432 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 20 selfloop transitions, 11 changer transitions 8/83 dead transitions. [2021-10-21 19:09:59,433 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 83 transitions, 394 flow [2021-10-21 19:09:59,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:09:59,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-21 19:09:59,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 509 transitions. [2021-10-21 19:09:59,454 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8569023569023569 [2021-10-21 19:09:59,454 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 509 transitions. [2021-10-21 19:09:59,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 509 transitions. [2021-10-21 19:09:59,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:09:59,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 509 transitions. [2021-10-21 19:09:59,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 56.55555555555556) internal successors, (509), 9 states have internal predecessors, (509), 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) [2021-10-21 19:09:59,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 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) [2021-10-21 19:09:59,462 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 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) [2021-10-21 19:09:59,463 INFO L186 Difference]: Start difference. First operand has 73 places, 64 transitions, 214 flow. Second operand 9 states and 509 transitions. [2021-10-21 19:09:59,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 83 transitions, 394 flow [2021-10-21 19:09:59,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 83 transitions, 371 flow, removed 9 selfloop flow, removed 3 redundant places. [2021-10-21 19:09:59,472 INFO L242 Difference]: Finished difference. Result has 83 places, 69 transitions, 283 flow [2021-10-21 19:09:59,473 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=283, PETRI_PLACES=83, PETRI_TRANSITIONS=69} [2021-10-21 19:09:59,473 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 17 predicate places. [2021-10-21 19:09:59,473 INFO L470 AbstractCegarLoop]: Abstraction has has 83 places, 69 transitions, 283 flow [2021-10-21 19:09:59,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 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) [2021-10-21 19:09:59,474 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:09:59,475 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] [2021-10-21 19:09:59,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 19:09:59,475 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 19:09:59,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:09:59,477 INFO L82 PathProgramCache]: Analyzing trace with hash 482644881, now seen corresponding path program 2 times [2021-10-21 19:09:59,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:09:59,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950177999] [2021-10-21 19:09:59,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:09:59,478 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:09:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:59,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:09:59,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:09:59,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950177999] [2021-10-21 19:09:59,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950177999] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:09:59,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:09:59,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 19:09:59,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385751637] [2021-10-21 19:09:59,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:09:59,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:09:59,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:09:59,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:09:59,629 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-21 19:09:59,630 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 69 transitions, 283 flow. Second operand has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 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) [2021-10-21 19:09:59,631 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:09:59,631 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-21 19:09:59,631 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:09:59,761 INFO L129 PetriNetUnfolder]: 28/171 cut-off events. [2021-10-21 19:09:59,762 INFO L130 PetriNetUnfolder]: For 239/271 co-relation queries the response was YES. [2021-10-21 19:09:59,764 INFO L84 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 171 events. 28/171 cut-off events. For 239/271 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 551 event pairs, 0 based on Foata normal form. 28/183 useless extension candidates. Maximal degree in co-relation 346. Up to 30 conditions per place. [2021-10-21 19:09:59,765 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 16 selfloop transitions, 12 changer transitions 11/83 dead transitions. [2021-10-21 19:09:59,765 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 83 transitions, 471 flow [2021-10-21 19:09:59,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:09:59,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-21 19:09:59,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 503 transitions. [2021-10-21 19:09:59,768 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8468013468013468 [2021-10-21 19:09:59,769 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 503 transitions. [2021-10-21 19:09:59,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 503 transitions. [2021-10-21 19:09:59,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:09:59,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 503 transitions. [2021-10-21 19:09:59,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 55.888888888888886) internal successors, (503), 9 states have internal predecessors, (503), 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) [2021-10-21 19:09:59,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 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) [2021-10-21 19:09:59,774 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 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) [2021-10-21 19:09:59,774 INFO L186 Difference]: Start difference. First operand has 83 places, 69 transitions, 283 flow. Second operand 9 states and 503 transitions. [2021-10-21 19:09:59,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 83 transitions, 471 flow [2021-10-21 19:09:59,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 83 transitions, 451 flow, removed 6 selfloop flow, removed 3 redundant places. [2021-10-21 19:09:59,788 INFO L242 Difference]: Finished difference. Result has 90 places, 70 transitions, 326 flow [2021-10-21 19:09:59,789 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=326, PETRI_PLACES=90, PETRI_TRANSITIONS=70} [2021-10-21 19:09:59,789 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 24 predicate places. [2021-10-21 19:09:59,789 INFO L470 AbstractCegarLoop]: Abstraction has has 90 places, 70 transitions, 326 flow [2021-10-21 19:09:59,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 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) [2021-10-21 19:09:59,790 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:09:59,790 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] [2021-10-21 19:09:59,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 19:09:59,791 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 19:09:59,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:09:59,791 INFO L82 PathProgramCache]: Analyzing trace with hash 557630062, now seen corresponding path program 1 times [2021-10-21 19:09:59,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:09:59,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856275043] [2021-10-21 19:09:59,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:09:59,792 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:09:59,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:09:59,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:09:59,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:09:59,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856275043] [2021-10-21 19:09:59,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856275043] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:09:59,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:09:59,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-21 19:09:59,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586545526] [2021-10-21 19:09:59,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:09:59,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:09:59,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:09:59,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:09:59,945 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-21 19:09:59,946 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 70 transitions, 326 flow. Second operand has 7 states, 7 states have (on average 54.142857142857146) internal successors, (379), 7 states have internal predecessors, (379), 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) [2021-10-21 19:09:59,946 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:09:59,946 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-21 19:09:59,946 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:10:00,090 INFO L129 PetriNetUnfolder]: 41/214 cut-off events. [2021-10-21 19:10:00,091 INFO L130 PetriNetUnfolder]: For 570/604 co-relation queries the response was YES. [2021-10-21 19:10:00,092 INFO L84 FinitePrefix]: Finished finitePrefix Result has 556 conditions, 214 events. 41/214 cut-off events. For 570/604 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 743 event pairs, 0 based on Foata normal form. 20/215 useless extension candidates. Maximal degree in co-relation 506. Up to 48 conditions per place. [2021-10-21 19:10:00,094 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 21 selfloop transitions, 21 changer transitions 8/94 dead transitions. [2021-10-21 19:10:00,094 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 94 transitions, 650 flow [2021-10-21 19:10:00,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:10:00,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-21 19:10:00,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 620 transitions. [2021-10-21 19:10:00,098 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8539944903581267 [2021-10-21 19:10:00,098 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 620 transitions. [2021-10-21 19:10:00,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 620 transitions. [2021-10-21 19:10:00,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:10:00,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 620 transitions. [2021-10-21 19:10:00,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 56.36363636363637) internal successors, (620), 11 states have internal predecessors, (620), 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) [2021-10-21 19:10:00,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 66.0) internal successors, (792), 12 states have internal predecessors, (792), 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) [2021-10-21 19:10:00,104 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 66.0) internal successors, (792), 12 states have internal predecessors, (792), 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) [2021-10-21 19:10:00,104 INFO L186 Difference]: Start difference. First operand has 90 places, 70 transitions, 326 flow. Second operand 11 states and 620 transitions. [2021-10-21 19:10:00,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 94 transitions, 650 flow [2021-10-21 19:10:00,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 94 transitions, 534 flow, removed 45 selfloop flow, removed 10 redundant places. [2021-10-21 19:10:00,110 INFO L242 Difference]: Finished difference. Result has 94 places, 76 transitions, 411 flow [2021-10-21 19:10:00,111 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=411, PETRI_PLACES=94, PETRI_TRANSITIONS=76} [2021-10-21 19:10:00,111 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 28 predicate places. [2021-10-21 19:10:00,111 INFO L470 AbstractCegarLoop]: Abstraction has has 94 places, 76 transitions, 411 flow [2021-10-21 19:10:00,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 54.142857142857146) internal successors, (379), 7 states have internal predecessors, (379), 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) [2021-10-21 19:10:00,112 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:10:00,112 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] [2021-10-21 19:10:00,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-21 19:10:00,112 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 19:10:00,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:00,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1889861268, now seen corresponding path program 2 times [2021-10-21 19:10:00,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:00,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690916664] [2021-10-21 19:10:00,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:00,114 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:00,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:00,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:00,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:00,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690916664] [2021-10-21 19:10:00,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690916664] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:00,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:10:00,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-21 19:10:00,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224394424] [2021-10-21 19:10:00,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:10:00,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:00,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:10:00,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:10:00,260 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-21 19:10:00,260 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 76 transitions, 411 flow. Second operand has 7 states, 7 states have (on average 54.142857142857146) internal successors, (379), 7 states have internal predecessors, (379), 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) [2021-10-21 19:10:00,260 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:10:00,260 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-21 19:10:00,261 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:10:00,432 INFO L129 PetriNetUnfolder]: 36/206 cut-off events. [2021-10-21 19:10:00,432 INFO L130 PetriNetUnfolder]: For 803/857 co-relation queries the response was YES. [2021-10-21 19:10:00,433 INFO L84 FinitePrefix]: Finished finitePrefix Result has 594 conditions, 206 events. 36/206 cut-off events. For 803/857 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 748 event pairs, 0 based on Foata normal form. 29/216 useless extension candidates. Maximal degree in co-relation 550. Up to 44 conditions per place. [2021-10-21 19:10:00,435 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 19 selfloop transitions, 23 changer transitions 11/97 dead transitions. [2021-10-21 19:10:00,435 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 97 transitions, 781 flow [2021-10-21 19:10:00,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:10:00,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-21 19:10:00,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 670 transitions. [2021-10-21 19:10:00,439 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8459595959595959 [2021-10-21 19:10:00,439 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 670 transitions. [2021-10-21 19:10:00,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 670 transitions. [2021-10-21 19:10:00,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:10:00,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 670 transitions. [2021-10-21 19:10:00,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 55.833333333333336) internal successors, (670), 12 states have internal predecessors, (670), 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) [2021-10-21 19:10:00,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 66.0) internal successors, (858), 13 states have internal predecessors, (858), 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) [2021-10-21 19:10:00,446 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 66.0) internal successors, (858), 13 states have internal predecessors, (858), 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) [2021-10-21 19:10:00,446 INFO L186 Difference]: Start difference. First operand has 94 places, 76 transitions, 411 flow. Second operand 12 states and 670 transitions. [2021-10-21 19:10:00,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 97 transitions, 781 flow [2021-10-21 19:10:00,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 97 transitions, 723 flow, removed 20 selfloop flow, removed 5 redundant places. [2021-10-21 19:10:00,454 INFO L242 Difference]: Finished difference. Result has 103 places, 79 transitions, 499 flow [2021-10-21 19:10:00,455 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=499, PETRI_PLACES=103, PETRI_TRANSITIONS=79} [2021-10-21 19:10:00,455 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 37 predicate places. [2021-10-21 19:10:00,455 INFO L470 AbstractCegarLoop]: Abstraction has has 103 places, 79 transitions, 499 flow [2021-10-21 19:10:00,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 54.142857142857146) internal successors, (379), 7 states have internal predecessors, (379), 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) [2021-10-21 19:10:00,456 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:10:00,456 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:00,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-21 19:10:00,457 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 19:10:00,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:00,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1339160469, now seen corresponding path program 1 times [2021-10-21 19:10:00,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:00,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53370581] [2021-10-21 19:10:00,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:00,458 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:00,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:00,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:00,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:00,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53370581] [2021-10-21 19:10:00,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53370581] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:00,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547642309] [2021-10-21 19:10:00,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:00,596 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:10:00,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:10:00,598 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:10:00,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:10:00,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:00,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:10:00,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:10:01,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:01,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547642309] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:01,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:10:01,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-21 19:10:01,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061788700] [2021-10-21 19:10:01,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:10:01,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:01,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:10:01,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:10:01,059 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-21 19:10:01,060 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 79 transitions, 499 flow. Second operand has 9 states, 9 states have (on average 54.22222222222222) internal successors, (488), 9 states have internal predecessors, (488), 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) [2021-10-21 19:10:01,060 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:10:01,060 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-21 19:10:01,060 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:10:01,224 INFO L129 PetriNetUnfolder]: 36/213 cut-off events. [2021-10-21 19:10:01,224 INFO L130 PetriNetUnfolder]: For 1073/1130 co-relation queries the response was YES. [2021-10-21 19:10:01,226 INFO L84 FinitePrefix]: Finished finitePrefix Result has 654 conditions, 213 events. 36/213 cut-off events. For 1073/1130 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 734 event pairs, 0 based on Foata normal form. 35/227 useless extension candidates. Maximal degree in co-relation 604. Up to 44 conditions per place. [2021-10-21 19:10:01,229 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 28 selfloop transitions, 13 changer transitions 8/93 dead transitions. [2021-10-21 19:10:01,229 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 93 transitions, 807 flow [2021-10-21 19:10:01,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:10:01,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-21 19:10:01,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 615 transitions. [2021-10-21 19:10:01,232 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8471074380165289 [2021-10-21 19:10:01,232 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 615 transitions. [2021-10-21 19:10:01,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 615 transitions. [2021-10-21 19:10:01,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:10:01,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 615 transitions. [2021-10-21 19:10:01,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 55.90909090909091) internal successors, (615), 11 states have internal predecessors, (615), 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) [2021-10-21 19:10:01,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 66.0) internal successors, (792), 12 states have internal predecessors, (792), 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) [2021-10-21 19:10:01,241 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 66.0) internal successors, (792), 12 states have internal predecessors, (792), 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) [2021-10-21 19:10:01,241 INFO L186 Difference]: Start difference. First operand has 103 places, 79 transitions, 499 flow. Second operand 11 states and 615 transitions. [2021-10-21 19:10:01,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 93 transitions, 807 flow [2021-10-21 19:10:01,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 93 transitions, 734 flow, removed 19 selfloop flow, removed 9 redundant places. [2021-10-21 19:10:01,253 INFO L242 Difference]: Finished difference. Result has 106 places, 81 transitions, 514 flow [2021-10-21 19:10:01,254 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=514, PETRI_PLACES=106, PETRI_TRANSITIONS=81} [2021-10-21 19:10:01,254 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 40 predicate places. [2021-10-21 19:10:01,254 INFO L470 AbstractCegarLoop]: Abstraction has has 106 places, 81 transitions, 514 flow [2021-10-21 19:10:01,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 54.22222222222222) internal successors, (488), 9 states have internal predecessors, (488), 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) [2021-10-21 19:10:01,255 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:10:01,255 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:01,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:10:01,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:10:01,479 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 19:10:01,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:01,479 INFO L82 PathProgramCache]: Analyzing trace with hash 466216687, now seen corresponding path program 2 times [2021-10-21 19:10:01,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:01,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720091578] [2021-10-21 19:10:01,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:01,480 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:01,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:01,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:01,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:01,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720091578] [2021-10-21 19:10:01,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720091578] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:01,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181581447] [2021-10-21 19:10:01,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:10:01,599 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:10:01,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:10:01,600 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:10:01,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:10:01,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:10:01,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:10:01,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:10:01,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:10:01,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:01,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181581447] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:01,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:10:01,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-10-21 19:10:01,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606555968] [2021-10-21 19:10:01,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:10:01,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:01,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:10:01,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:10:01,959 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-21 19:10:01,959 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 81 transitions, 514 flow. Second operand has 10 states, 10 states have (on average 54.3) internal successors, (543), 10 states have internal predecessors, (543), 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) [2021-10-21 19:10:01,960 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:10:01,960 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-21 19:10:01,960 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:10:02,143 INFO L129 PetriNetUnfolder]: 42/245 cut-off events. [2021-10-21 19:10:02,143 INFO L130 PetriNetUnfolder]: For 1540/1608 co-relation queries the response was YES. [2021-10-21 19:10:02,145 INFO L84 FinitePrefix]: Finished finitePrefix Result has 803 conditions, 245 events. 42/245 cut-off events. For 1540/1608 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 964 event pairs, 0 based on Foata normal form. 35/256 useless extension candidates. Maximal degree in co-relation 748. Up to 54 conditions per place. [2021-10-21 19:10:02,148 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 28 selfloop transitions, 21 changer transitions 8/101 dead transitions. [2021-10-21 19:10:02,148 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 101 transitions, 952 flow [2021-10-21 19:10:02,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 19:10:02,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-21 19:10:02,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 782 transitions. [2021-10-21 19:10:02,152 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8463203463203464 [2021-10-21 19:10:02,152 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 782 transitions. [2021-10-21 19:10:02,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 782 transitions. [2021-10-21 19:10:02,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:10:02,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 782 transitions. [2021-10-21 19:10:02,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 55.857142857142854) internal successors, (782), 14 states have internal predecessors, (782), 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) [2021-10-21 19:10:02,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 66.0) internal successors, (990), 15 states have internal predecessors, (990), 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) [2021-10-21 19:10:02,159 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 66.0) internal successors, (990), 15 states have internal predecessors, (990), 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) [2021-10-21 19:10:02,159 INFO L186 Difference]: Start difference. First operand has 106 places, 81 transitions, 514 flow. Second operand 14 states and 782 transitions. [2021-10-21 19:10:02,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 101 transitions, 952 flow [2021-10-21 19:10:02,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 101 transitions, 858 flow, removed 36 selfloop flow, removed 8 redundant places. [2021-10-21 19:10:02,171 INFO L242 Difference]: Finished difference. Result has 115 places, 88 transitions, 629 flow [2021-10-21 19:10:02,171 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=629, PETRI_PLACES=115, PETRI_TRANSITIONS=88} [2021-10-21 19:10:02,171 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 49 predicate places. [2021-10-21 19:10:02,172 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 88 transitions, 629 flow [2021-10-21 19:10:02,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 54.3) internal successors, (543), 10 states have internal predecessors, (543), 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) [2021-10-21 19:10:02,172 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:10:02,172 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:02,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:10:02,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:10:02,386 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 19:10:02,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:02,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1190358857, now seen corresponding path program 3 times [2021-10-21 19:10:02,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:02,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141007993] [2021-10-21 19:10:02,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:02,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:02,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:02,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:02,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:02,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141007993] [2021-10-21 19:10:02,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141007993] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:02,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651228174] [2021-10-21 19:10:02,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:10:02,484 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:10:02,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:10:02,487 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:10:02,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:10:02,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 19:10:02,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:10:02,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:10:02,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:10:02,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:02,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651228174] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:02,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:10:02,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-21 19:10:02,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834658935] [2021-10-21 19:10:02,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:10:02,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:02,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:10:02,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:10:02,776 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-21 19:10:02,777 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 88 transitions, 629 flow. Second operand has 9 states, 9 states have (on average 54.22222222222222) internal successors, (488), 9 states have internal predecessors, (488), 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) [2021-10-21 19:10:02,777 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:10:02,777 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-21 19:10:02,777 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:10:02,974 INFO L129 PetriNetUnfolder]: 57/320 cut-off events. [2021-10-21 19:10:02,974 INFO L130 PetriNetUnfolder]: For 2724/2816 co-relation queries the response was YES. [2021-10-21 19:10:02,977 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1173 conditions, 320 events. 57/320 cut-off events. For 2724/2816 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1464 event pairs, 0 based on Foata normal form. 40/328 useless extension candidates. Maximal degree in co-relation 1112. Up to 74 conditions per place. [2021-10-21 19:10:02,980 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 34 selfloop transitions, 26 changer transitions 8/112 dead transitions. [2021-10-21 19:10:02,981 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 112 transitions, 1217 flow [2021-10-21 19:10:02,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:10:02,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-21 19:10:02,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 842 transitions. [2021-10-21 19:10:02,985 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8505050505050505 [2021-10-21 19:10:02,985 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 842 transitions. [2021-10-21 19:10:02,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 842 transitions. [2021-10-21 19:10:02,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:10:02,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 842 transitions. [2021-10-21 19:10:02,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 56.13333333333333) internal successors, (842), 15 states have internal predecessors, (842), 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) [2021-10-21 19:10:02,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 66.0) internal successors, (1056), 16 states have internal predecessors, (1056), 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) [2021-10-21 19:10:02,993 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 66.0) internal successors, (1056), 16 states have internal predecessors, (1056), 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) [2021-10-21 19:10:02,993 INFO L186 Difference]: Start difference. First operand has 115 places, 88 transitions, 629 flow. Second operand 15 states and 842 transitions. [2021-10-21 19:10:02,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 112 transitions, 1217 flow [2021-10-21 19:10:03,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 112 transitions, 1085 flow, removed 60 selfloop flow, removed 6 redundant places. [2021-10-21 19:10:03,016 INFO L242 Difference]: Finished difference. Result has 127 places, 94 transitions, 765 flow [2021-10-21 19:10:03,017 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=567, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=765, PETRI_PLACES=127, PETRI_TRANSITIONS=94} [2021-10-21 19:10:03,017 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 61 predicate places. [2021-10-21 19:10:03,017 INFO L470 AbstractCegarLoop]: Abstraction has has 127 places, 94 transitions, 765 flow [2021-10-21 19:10:03,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 54.22222222222222) internal successors, (488), 9 states have internal predecessors, (488), 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) [2021-10-21 19:10:03,018 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:10:03,018 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:03,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:10:03,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:10:03,247 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 19:10:03,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:03,247 INFO L82 PathProgramCache]: Analyzing trace with hash -2019400091, now seen corresponding path program 4 times [2021-10-21 19:10:03,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:03,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477964248] [2021-10-21 19:10:03,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:03,248 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:03,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:03,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:03,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477964248] [2021-10-21 19:10:03,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477964248] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:03,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193417305] [2021-10-21 19:10:03,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:10:03,362 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:10:03,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:10:03,364 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:10:03,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:10:03,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:10:03,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:10:03,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:10:03,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:10:03,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:03,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193417305] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:03,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:10:03,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-10-21 19:10:03,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142571006] [2021-10-21 19:10:03,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:10:03,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:03,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:10:03,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:10:03,705 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-21 19:10:03,706 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 94 transitions, 765 flow. Second operand has 10 states, 10 states have (on average 54.2) internal successors, (542), 10 states have internal predecessors, (542), 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) [2021-10-21 19:10:03,706 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:10:03,706 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-21 19:10:03,706 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:10:04,037 INFO L129 PetriNetUnfolder]: 58/343 cut-off events. [2021-10-21 19:10:04,038 INFO L130 PetriNetUnfolder]: For 3986/4075 co-relation queries the response was YES. [2021-10-21 19:10:04,040 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1352 conditions, 343 events. 58/343 cut-off events. For 3986/4075 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1641 event pairs, 0 based on Foata normal form. 47/356 useless extension candidates. Maximal degree in co-relation 1287. Up to 76 conditions per place. [2021-10-21 19:10:04,044 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 30 selfloop transitions, 34 changer transitions 17/125 dead transitions. [2021-10-21 19:10:04,044 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 125 transitions, 1651 flow [2021-10-21 19:10:04,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-21 19:10:04,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-21 19:10:04,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1116 transitions. [2021-10-21 19:10:04,050 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8454545454545455 [2021-10-21 19:10:04,050 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1116 transitions. [2021-10-21 19:10:04,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1116 transitions. [2021-10-21 19:10:04,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:10:04,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1116 transitions. [2021-10-21 19:10:04,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 55.8) internal successors, (1116), 20 states have internal predecessors, (1116), 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) [2021-10-21 19:10:04,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 66.0) internal successors, (1386), 21 states have internal predecessors, (1386), 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) [2021-10-21 19:10:04,060 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 66.0) internal successors, (1386), 21 states have internal predecessors, (1386), 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) [2021-10-21 19:10:04,060 INFO L186 Difference]: Start difference. First operand has 127 places, 94 transitions, 765 flow. Second operand 20 states and 1116 transitions. [2021-10-21 19:10:04,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 125 transitions, 1651 flow [2021-10-21 19:10:04,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 125 transitions, 1431 flow, removed 93 selfloop flow, removed 10 redundant places. [2021-10-21 19:10:04,083 INFO L242 Difference]: Finished difference. Result has 143 places, 103 transitions, 975 flow [2021-10-21 19:10:04,084 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=975, PETRI_PLACES=143, PETRI_TRANSITIONS=103} [2021-10-21 19:10:04,084 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 77 predicate places. [2021-10-21 19:10:04,084 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 103 transitions, 975 flow [2021-10-21 19:10:04,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 54.2) internal successors, (542), 10 states have internal predecessors, (542), 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) [2021-10-21 19:10:04,085 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:10:04,085 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-21 19:10:04,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:10:04,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-21 19:10:04,302 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 19:10:04,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:04,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1615124285, now seen corresponding path program 1 times [2021-10-21 19:10:04,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:04,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279777205] [2021-10-21 19:10:04,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:04,303 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:04,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:04,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:04,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:04,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279777205] [2021-10-21 19:10:04,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279777205] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:04,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061083380] [2021-10-21 19:10:04,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:04,423 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:10:04,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:10:04,424 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:10:04,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 19:10:04,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:04,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 19:10:04,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:10:04,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:04,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061083380] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:04,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:10:04,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-10-21 19:10:04,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439204445] [2021-10-21 19:10:04,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:10:04,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:04,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:10:04,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:10:04,762 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-21 19:10:04,763 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 103 transitions, 975 flow. Second operand has 9 states, 9 states have (on average 54.111111111111114) internal successors, (487), 9 states have internal predecessors, (487), 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) [2021-10-21 19:10:04,763 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:10:04,763 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-21 19:10:04,763 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:10:04,935 INFO L129 PetriNetUnfolder]: 54/323 cut-off events. [2021-10-21 19:10:04,935 INFO L130 PetriNetUnfolder]: For 4100/4187 co-relation queries the response was YES. [2021-10-21 19:10:04,938 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1301 conditions, 323 events. 54/323 cut-off events. For 4100/4187 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1506 event pairs, 0 based on Foata normal form. 31/322 useless extension candidates. Maximal degree in co-relation 1228. Up to 70 conditions per place. [2021-10-21 19:10:04,942 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 45 selfloop transitions, 25 changer transitions 8/122 dead transitions. [2021-10-21 19:10:04,942 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 122 transitions, 1613 flow [2021-10-21 19:10:04,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 19:10:04,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-21 19:10:04,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 726 transitions. [2021-10-21 19:10:04,945 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8461538461538461 [2021-10-21 19:10:04,945 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 726 transitions. [2021-10-21 19:10:04,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 726 transitions. [2021-10-21 19:10:04,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:10:04,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 726 transitions. [2021-10-21 19:10:04,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 55.84615384615385) internal successors, (726), 13 states have internal predecessors, (726), 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) [2021-10-21 19:10:04,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 66.0) internal successors, (924), 14 states have internal predecessors, (924), 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) [2021-10-21 19:10:04,952 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 66.0) internal successors, (924), 14 states have internal predecessors, (924), 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) [2021-10-21 19:10:04,953 INFO L186 Difference]: Start difference. First operand has 143 places, 103 transitions, 975 flow. Second operand 13 states and 726 transitions. [2021-10-21 19:10:04,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 122 transitions, 1613 flow [2021-10-21 19:10:04,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 122 transitions, 1374 flow, removed 105 selfloop flow, removed 13 redundant places. [2021-10-21 19:10:04,975 INFO L242 Difference]: Finished difference. Result has 142 places, 105 transitions, 890 flow [2021-10-21 19:10:04,975 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=890, PETRI_PLACES=142, PETRI_TRANSITIONS=105} [2021-10-21 19:10:04,976 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 76 predicate places. [2021-10-21 19:10:04,976 INFO L470 AbstractCegarLoop]: Abstraction has has 142 places, 105 transitions, 890 flow [2021-10-21 19:10:04,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 54.111111111111114) internal successors, (487), 9 states have internal predecessors, (487), 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) [2021-10-21 19:10:04,976 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:10:04,976 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-21 19:10:05,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:10:05,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:10:05,192 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 19:10:05,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:05,192 INFO L82 PathProgramCache]: Analyzing trace with hash 70257965, now seen corresponding path program 2 times [2021-10-21 19:10:05,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:05,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093707355] [2021-10-21 19:10:05,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:05,192 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:05,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:05,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:05,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:05,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093707355] [2021-10-21 19:10:05,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093707355] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:05,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433082075] [2021-10-21 19:10:05,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:10:05,299 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:10:05,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:10:05,300 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:10:05,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 19:10:05,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:10:05,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:10:05,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 19:10:05,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:10:05,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:05,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433082075] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:05,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:10:05,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-10-21 19:10:05,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099235231] [2021-10-21 19:10:05,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:10:05,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:05,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:10:05,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:10:05,650 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-21 19:10:05,650 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 105 transitions, 890 flow. Second operand has 9 states, 9 states have (on average 54.111111111111114) internal successors, (487), 9 states have internal predecessors, (487), 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) [2021-10-21 19:10:05,651 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:10:05,651 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-21 19:10:05,651 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:10:05,889 INFO L129 PetriNetUnfolder]: 69/418 cut-off events. [2021-10-21 19:10:05,889 INFO L130 PetriNetUnfolder]: For 5788/5870 co-relation queries the response was YES. [2021-10-21 19:10:05,893 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1695 conditions, 418 events. 69/418 cut-off events. For 5788/5870 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2172 event pairs, 0 based on Foata normal form. 36/414 useless extension candidates. Maximal degree in co-relation 1621. Up to 78 conditions per place. [2021-10-21 19:10:05,898 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 36 selfloop transitions, 45 changer transitions 8/133 dead transitions. [2021-10-21 19:10:05,898 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 133 transitions, 1808 flow [2021-10-21 19:10:05,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 19:10:05,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-21 19:10:05,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 895 transitions. [2021-10-21 19:10:05,900 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8475378787878788 [2021-10-21 19:10:05,901 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 895 transitions. [2021-10-21 19:10:05,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 895 transitions. [2021-10-21 19:10:05,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:10:05,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 895 transitions. [2021-10-21 19:10:05,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 55.9375) internal successors, (895), 16 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) [2021-10-21 19:10:05,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 66.0) internal successors, (1122), 17 states have internal predecessors, (1122), 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) [2021-10-21 19:10:05,911 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 66.0) internal successors, (1122), 17 states have internal predecessors, (1122), 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) [2021-10-21 19:10:05,911 INFO L186 Difference]: Start difference. First operand has 142 places, 105 transitions, 890 flow. Second operand 16 states and 895 transitions. [2021-10-21 19:10:05,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 133 transitions, 1808 flow [2021-10-21 19:10:05,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 133 transitions, 1634 flow, removed 66 selfloop flow, removed 10 redundant places. [2021-10-21 19:10:05,936 INFO L242 Difference]: Finished difference. Result has 151 places, 111 transitions, 1097 flow [2021-10-21 19:10:05,937 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1097, PETRI_PLACES=151, PETRI_TRANSITIONS=111} [2021-10-21 19:10:05,938 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 85 predicate places. [2021-10-21 19:10:05,938 INFO L470 AbstractCegarLoop]: Abstraction has has 151 places, 111 transitions, 1097 flow [2021-10-21 19:10:05,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 54.111111111111114) internal successors, (487), 9 states have internal predecessors, (487), 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) [2021-10-21 19:10:05,938 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:10:05,939 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-21 19:10:05,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:10:06,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:10:06,166 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 19:10:06,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:06,167 INFO L82 PathProgramCache]: Analyzing trace with hash -245613985, now seen corresponding path program 3 times [2021-10-21 19:10:06,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:06,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941340926] [2021-10-21 19:10:06,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:06,167 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:06,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:06,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:06,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:06,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941340926] [2021-10-21 19:10:06,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941340926] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:06,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106165818] [2021-10-21 19:10:06,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:10:06,268 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:10:06,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:10:06,269 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:10:06,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 19:10:06,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 19:10:06,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:10:06,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 19:10:06,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:10:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:06,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106165818] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:06,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:10:06,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-10-21 19:10:06,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655041006] [2021-10-21 19:10:06,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:10:06,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:06,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:10:06,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:10:06,621 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-21 19:10:06,621 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 111 transitions, 1097 flow. Second operand has 10 states, 10 states have (on average 54.2) internal successors, (542), 10 states have internal predecessors, (542), 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) [2021-10-21 19:10:06,621 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:10:06,622 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-21 19:10:06,622 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:10:06,932 INFO L129 PetriNetUnfolder]: 64/390 cut-off events. [2021-10-21 19:10:06,933 INFO L130 PetriNetUnfolder]: For 6648/6766 co-relation queries the response was YES. [2021-10-21 19:10:06,936 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1682 conditions, 390 events. 64/390 cut-off events. For 6648/6766 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2002 event pairs, 0 based on Foata normal form. 50/402 useless extension candidates. Maximal degree in co-relation 1604. Up to 74 conditions per place. [2021-10-21 19:10:06,941 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 28 selfloop transitions, 53 changer transitions 11/136 dead transitions. [2021-10-21 19:10:06,941 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 136 transitions, 2053 flow [2021-10-21 19:10:06,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-21 19:10:06,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-21 19:10:06,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1003 transitions. [2021-10-21 19:10:06,944 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8442760942760943 [2021-10-21 19:10:06,944 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1003 transitions. [2021-10-21 19:10:06,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1003 transitions. [2021-10-21 19:10:06,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:10:06,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1003 transitions. [2021-10-21 19:10:06,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 55.72222222222222) internal successors, (1003), 18 states have internal predecessors, (1003), 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) [2021-10-21 19:10:06,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 66.0) internal successors, (1254), 19 states have internal predecessors, (1254), 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) [2021-10-21 19:10:06,951 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 66.0) internal successors, (1254), 19 states have internal predecessors, (1254), 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) [2021-10-21 19:10:06,951 INFO L186 Difference]: Start difference. First operand has 151 places, 111 transitions, 1097 flow. Second operand 18 states and 1003 transitions. [2021-10-21 19:10:06,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 136 transitions, 2053 flow [2021-10-21 19:10:06,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 136 transitions, 1794 flow, removed 101 selfloop flow, removed 11 redundant places. [2021-10-21 19:10:06,979 INFO L242 Difference]: Finished difference. Result has 160 places, 114 transitions, 1183 flow [2021-10-21 19:10:06,980 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1183, PETRI_PLACES=160, PETRI_TRANSITIONS=114} [2021-10-21 19:10:06,980 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 94 predicate places. [2021-10-21 19:10:06,980 INFO L470 AbstractCegarLoop]: Abstraction has has 160 places, 114 transitions, 1183 flow [2021-10-21 19:10:06,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 54.2) internal successors, (542), 10 states have internal predecessors, (542), 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) [2021-10-21 19:10:06,981 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:10:06,981 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:07,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:10:07,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-21 19:10:07,206 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 19:10:07,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:07,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1609128234, now seen corresponding path program 4 times [2021-10-21 19:10:07,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:07,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868528020] [2021-10-21 19:10:07,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:07,207 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:07,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:07,317 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:07,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:07,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868528020] [2021-10-21 19:10:07,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868528020] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:07,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170254972] [2021-10-21 19:10:07,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:10:07,318 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:10:07,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:10:07,319 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:10:07,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 19:10:07,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:10:07,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:10:07,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 19:10:07,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:10:07,804 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:07,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170254972] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:07,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:10:07,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-10-21 19:10:07,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779541811] [2021-10-21 19:10:07,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:10:07,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:07,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:10:07,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:10:07,808 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-21 19:10:07,809 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 114 transitions, 1183 flow. Second operand has 11 states, 11 states have (on average 54.18181818181818) internal successors, (596), 11 states have internal predecessors, (596), 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) [2021-10-21 19:10:07,809 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:10:07,810 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-21 19:10:07,810 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:10:08,010 INFO L129 PetriNetUnfolder]: 64/404 cut-off events. [2021-10-21 19:10:08,010 INFO L130 PetriNetUnfolder]: For 6256/6339 co-relation queries the response was YES. [2021-10-21 19:10:08,014 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1697 conditions, 404 events. 64/404 cut-off events. For 6256/6339 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2053 event pairs, 0 based on Foata normal form. 35/399 useless extension candidates. Maximal degree in co-relation 1616. Up to 87 conditions per place. [2021-10-21 19:10:08,019 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 63 selfloop transitions, 15 changer transitions 8/130 dead transitions. [2021-10-21 19:10:08,020 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 130 transitions, 1837 flow [2021-10-21 19:10:08,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 19:10:08,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-21 19:10:08,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 725 transitions. [2021-10-21 19:10:08,022 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.844988344988345 [2021-10-21 19:10:08,022 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 725 transitions. [2021-10-21 19:10:08,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 725 transitions. [2021-10-21 19:10:08,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:10:08,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 725 transitions. [2021-10-21 19:10:08,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 55.76923076923077) internal successors, (725), 13 states have internal predecessors, (725), 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) [2021-10-21 19:10:08,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 66.0) internal successors, (924), 14 states have internal predecessors, (924), 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) [2021-10-21 19:10:08,028 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 66.0) internal successors, (924), 14 states have internal predecessors, (924), 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) [2021-10-21 19:10:08,028 INFO L186 Difference]: Start difference. First operand has 160 places, 114 transitions, 1183 flow. Second operand 13 states and 725 transitions. [2021-10-21 19:10:08,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 130 transitions, 1837 flow [2021-10-21 19:10:08,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 130 transitions, 1629 flow, removed 51 selfloop flow, removed 18 redundant places. [2021-10-21 19:10:08,061 INFO L242 Difference]: Finished difference. Result has 156 places, 116 transitions, 1121 flow [2021-10-21 19:10:08,061 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1007, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1121, PETRI_PLACES=156, PETRI_TRANSITIONS=116} [2021-10-21 19:10:08,062 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 90 predicate places. [2021-10-21 19:10:08,062 INFO L470 AbstractCegarLoop]: Abstraction has has 156 places, 116 transitions, 1121 flow [2021-10-21 19:10:08,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 54.18181818181818) internal successors, (596), 11 states have internal predecessors, (596), 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) [2021-10-21 19:10:08,062 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:10:08,063 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:08,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-10-21 19:10:08,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-21 19:10:08,285 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 19:10:08,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:08,285 INFO L82 PathProgramCache]: Analyzing trace with hash 378278894, now seen corresponding path program 5 times [2021-10-21 19:10:08,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:08,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378396072] [2021-10-21 19:10:08,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:08,286 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:08,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:08,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:08,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:08,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378396072] [2021-10-21 19:10:08,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378396072] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:08,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377997497] [2021-10-21 19:10:08,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:10:08,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:10:08,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:10:08,411 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:10:08,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 19:10:08,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-21 19:10:08,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:10:08,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 19:10:08,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:10:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:08,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377997497] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:08,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:10:08,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-10-21 19:10:08,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107851644] [2021-10-21 19:10:08,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:10:08,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:08,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:10:08,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:10:08,926 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-21 19:10:08,927 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 116 transitions, 1121 flow. Second operand has 12 states, 12 states have (on average 54.25) internal successors, (651), 12 states have internal predecessors, (651), 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) [2021-10-21 19:10:08,927 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:10:08,927 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-21 19:10:08,927 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:10:09,189 INFO L129 PetriNetUnfolder]: 66/408 cut-off events. [2021-10-21 19:10:09,190 INFO L130 PetriNetUnfolder]: For 7029/7131 co-relation queries the response was YES. [2021-10-21 19:10:09,193 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1745 conditions, 408 events. 66/408 cut-off events. For 7029/7131 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2119 event pairs, 0 based on Foata normal form. 37/404 useless extension candidates. Maximal degree in co-relation 1666. Up to 76 conditions per place. [2021-10-21 19:10:09,198 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 56 selfloop transitions, 25 changer transitions 8/133 dead transitions. [2021-10-21 19:10:09,199 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 133 transitions, 1839 flow [2021-10-21 19:10:09,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 19:10:09,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-21 19:10:09,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 892 transitions. [2021-10-21 19:10:09,201 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8446969696969697 [2021-10-21 19:10:09,201 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 892 transitions. [2021-10-21 19:10:09,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 892 transitions. [2021-10-21 19:10:09,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:10:09,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 892 transitions. [2021-10-21 19:10:09,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 55.75) internal successors, (892), 16 states have internal predecessors, (892), 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) [2021-10-21 19:10:09,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 66.0) internal successors, (1122), 17 states have internal predecessors, (1122), 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) [2021-10-21 19:10:09,208 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 66.0) internal successors, (1122), 17 states have internal predecessors, (1122), 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) [2021-10-21 19:10:09,208 INFO L186 Difference]: Start difference. First operand has 156 places, 116 transitions, 1121 flow. Second operand 16 states and 892 transitions. [2021-10-21 19:10:09,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 133 transitions, 1839 flow [2021-10-21 19:10:09,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 133 transitions, 1631 flow, removed 91 selfloop flow, removed 10 redundant places. [2021-10-21 19:10:09,238 INFO L242 Difference]: Finished difference. Result has 163 places, 118 transitions, 1153 flow [2021-10-21 19:10:09,239 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1021, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1153, PETRI_PLACES=163, PETRI_TRANSITIONS=118} [2021-10-21 19:10:09,239 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 97 predicate places. [2021-10-21 19:10:09,239 INFO L470 AbstractCegarLoop]: Abstraction has has 163 places, 118 transitions, 1153 flow [2021-10-21 19:10:09,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.25) internal successors, (651), 12 states have internal predecessors, (651), 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) [2021-10-21 19:10:09,240 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:10:09,240 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:09,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:10:09,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-21 19:10:09,463 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 19:10:09,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:09,464 INFO L82 PathProgramCache]: Analyzing trace with hash 25133018, now seen corresponding path program 6 times [2021-10-21 19:10:09,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:09,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853952885] [2021-10-21 19:10:09,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:09,464 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:09,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:09,568 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:09,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:09,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853952885] [2021-10-21 19:10:09,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853952885] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:09,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407181446] [2021-10-21 19:10:09,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:10:09,569 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:10:09,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:10:09,570 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:10:09,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 19:10:09,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-21 19:10:09,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:10:09,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 19:10:09,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:10:10,111 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:10,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407181446] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:10,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:10:10,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-10-21 19:10:10,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721575598] [2021-10-21 19:10:10,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:10:10,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:10,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:10:10,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:10:10,114 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-21 19:10:10,115 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 118 transitions, 1153 flow. Second operand has 11 states, 11 states have (on average 54.18181818181818) internal successors, (596), 11 states have internal predecessors, (596), 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) [2021-10-21 19:10:10,115 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:10:10,115 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-21 19:10:10,115 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:10:10,361 INFO L129 PetriNetUnfolder]: 68/433 cut-off events. [2021-10-21 19:10:10,361 INFO L130 PetriNetUnfolder]: For 6313/6393 co-relation queries the response was YES. [2021-10-21 19:10:10,366 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1759 conditions, 433 events. 68/433 cut-off events. For 6313/6393 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2311 event pairs, 0 based on Foata normal form. 40/429 useless extension candidates. Maximal degree in co-relation 1678. Up to 80 conditions per place. [2021-10-21 19:10:10,371 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 50 selfloop transitions, 32 changer transitions 8/134 dead transitions. [2021-10-21 19:10:10,371 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 134 transitions, 1819 flow [2021-10-21 19:10:10,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 19:10:10,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-21 19:10:10,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 948 transitions. [2021-10-21 19:10:10,399 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8449197860962567 [2021-10-21 19:10:10,399 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 948 transitions. [2021-10-21 19:10:10,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 948 transitions. [2021-10-21 19:10:10,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:10:10,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 948 transitions. [2021-10-21 19:10:10,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 55.76470588235294) internal successors, (948), 17 states have internal predecessors, (948), 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) [2021-10-21 19:10:10,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 66.0) internal successors, (1188), 18 states have internal predecessors, (1188), 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) [2021-10-21 19:10:10,404 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 66.0) internal successors, (1188), 18 states have internal predecessors, (1188), 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) [2021-10-21 19:10:10,405 INFO L186 Difference]: Start difference. First operand has 163 places, 118 transitions, 1153 flow. Second operand 17 states and 948 transitions. [2021-10-21 19:10:10,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 134 transitions, 1819 flow [2021-10-21 19:10:10,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 134 transitions, 1661 flow, removed 58 selfloop flow, removed 13 redundant places. [2021-10-21 19:10:10,435 INFO L242 Difference]: Finished difference. Result has 168 places, 120 transitions, 1205 flow [2021-10-21 19:10:10,436 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1055, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1205, PETRI_PLACES=168, PETRI_TRANSITIONS=120} [2021-10-21 19:10:10,436 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 102 predicate places. [2021-10-21 19:10:10,436 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 120 transitions, 1205 flow [2021-10-21 19:10:10,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 54.18181818181818) internal successors, (596), 11 states have internal predecessors, (596), 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) [2021-10-21 19:10:10,437 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:10:10,437 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:10,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 19:10:10,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-21 19:10:10,650 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 19:10:10,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:10,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1341298320, now seen corresponding path program 7 times [2021-10-21 19:10:10,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:10,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284699301] [2021-10-21 19:10:10,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:10,651 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:10,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:10,750 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:10,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:10,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284699301] [2021-10-21 19:10:10,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284699301] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:10,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756086484] [2021-10-21 19:10:10,751 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:10:10,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:10:10,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:10:10,762 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:10:10,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-21 19:10:11,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:11,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 19:10:11,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:10:11,263 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:11,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756086484] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:11,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:10:11,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-10-21 19:10:11,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781086376] [2021-10-21 19:10:11,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:10:11,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:11,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:10:11,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:10:11,266 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-21 19:10:11,267 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 120 transitions, 1205 flow. Second operand has 12 states, 12 states have (on average 54.25) internal successors, (651), 12 states have internal predecessors, (651), 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) [2021-10-21 19:10:11,267 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:10:11,267 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-21 19:10:11,268 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:10:11,593 INFO L129 PetriNetUnfolder]: 77/492 cut-off events. [2021-10-21 19:10:11,593 INFO L130 PetriNetUnfolder]: For 7370/7456 co-relation queries the response was YES. [2021-10-21 19:10:11,598 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2021 conditions, 492 events. 77/492 cut-off events. For 7370/7456 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2815 event pairs, 0 based on Foata normal form. 43/485 useless extension candidates. Maximal degree in co-relation 1938. Up to 96 conditions per place. [2021-10-21 19:10:11,621 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 41 selfloop transitions, 52 changer transitions 8/145 dead transitions. [2021-10-21 19:10:11,621 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 145 transitions, 2051 flow [2021-10-21 19:10:11,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-21 19:10:11,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-21 19:10:11,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1057 transitions. [2021-10-21 19:10:11,624 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8429027113237639 [2021-10-21 19:10:11,624 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1057 transitions. [2021-10-21 19:10:11,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1057 transitions. [2021-10-21 19:10:11,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:10:11,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1057 transitions. [2021-10-21 19:10:11,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 55.63157894736842) internal successors, (1057), 19 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) [2021-10-21 19:10:11,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 66.0) internal successors, (1320), 20 states have internal predecessors, (1320), 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) [2021-10-21 19:10:11,631 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 66.0) internal successors, (1320), 20 states have internal predecessors, (1320), 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) [2021-10-21 19:10:11,631 INFO L186 Difference]: Start difference. First operand has 168 places, 120 transitions, 1205 flow. Second operand 19 states and 1057 transitions. [2021-10-21 19:10:11,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 145 transitions, 2051 flow [2021-10-21 19:10:11,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 145 transitions, 1881 flow, removed 59 selfloop flow, removed 14 redundant places. [2021-10-21 19:10:11,665 INFO L242 Difference]: Finished difference. Result has 176 places, 130 transitions, 1454 flow [2021-10-21 19:10:11,666 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1103, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1454, PETRI_PLACES=176, PETRI_TRANSITIONS=130} [2021-10-21 19:10:11,666 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 110 predicate places. [2021-10-21 19:10:11,666 INFO L470 AbstractCegarLoop]: Abstraction has has 176 places, 130 transitions, 1454 flow [2021-10-21 19:10:11,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.25) internal successors, (651), 12 states have internal predecessors, (651), 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) [2021-10-21 19:10:11,667 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:10:11,667 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:11,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-21 19:10:11,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-21 19:10:11,882 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 19:10:11,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:11,883 INFO L82 PathProgramCache]: Analyzing trace with hash -863268282, now seen corresponding path program 8 times [2021-10-21 19:10:11,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:11,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125204116] [2021-10-21 19:10:11,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:11,883 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:11,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:11,973 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:11,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:11,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125204116] [2021-10-21 19:10:11,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125204116] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:11,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199687823] [2021-10-21 19:10:11,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:10:11,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:10:11,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:10:11,979 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:10:11,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-21 19:10:12,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:10:12,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:10:12,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 19:10:12,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:10:12,544 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:12,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199687823] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:12,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:10:12,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-10-21 19:10:12,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341070926] [2021-10-21 19:10:12,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:10:12,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:12,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:10:12,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:10:12,548 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-21 19:10:12,550 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 130 transitions, 1454 flow. Second operand has 12 states, 12 states have (on average 54.166666666666664) internal successors, (650), 12 states have internal predecessors, (650), 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) [2021-10-21 19:10:12,550 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:10:12,550 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-21 19:10:12,550 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:10:13,003 INFO L129 PetriNetUnfolder]: 94/577 cut-off events. [2021-10-21 19:10:13,004 INFO L130 PetriNetUnfolder]: For 10181/10302 co-relation queries the response was YES. [2021-10-21 19:10:13,011 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2587 conditions, 577 events. 94/577 cut-off events. For 10181/10302 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3495 event pairs, 0 based on Foata normal form. 51/570 useless extension candidates. Maximal degree in co-relation 2499. Up to 120 conditions per place. [2021-10-21 19:10:13,018 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 40 selfloop transitions, 70 changer transitions 14/168 dead transitions. [2021-10-21 19:10:13,018 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 168 transitions, 2803 flow [2021-10-21 19:10:13,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-21 19:10:13,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-21 19:10:13,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1338 transitions. [2021-10-21 19:10:13,026 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8446969696969697 [2021-10-21 19:10:13,027 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1338 transitions. [2021-10-21 19:10:13,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1338 transitions. [2021-10-21 19:10:13,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:10:13,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1338 transitions. [2021-10-21 19:10:13,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 55.75) internal successors, (1338), 24 states have internal predecessors, (1338), 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) [2021-10-21 19:10:13,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 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) [2021-10-21 19:10:13,054 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 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) [2021-10-21 19:10:13,054 INFO L186 Difference]: Start difference. First operand has 176 places, 130 transitions, 1454 flow. Second operand 24 states and 1338 transitions. [2021-10-21 19:10:13,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 168 transitions, 2803 flow [2021-10-21 19:10:13,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 168 transitions, 2603 flow, removed 81 selfloop flow, removed 12 redundant places. [2021-10-21 19:10:13,098 INFO L242 Difference]: Finished difference. Result has 195 places, 147 transitions, 1980 flow [2021-10-21 19:10:13,099 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1336, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1980, PETRI_PLACES=195, PETRI_TRANSITIONS=147} [2021-10-21 19:10:13,099 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 129 predicate places. [2021-10-21 19:10:13,099 INFO L470 AbstractCegarLoop]: Abstraction has has 195 places, 147 transitions, 1980 flow [2021-10-21 19:10:13,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.166666666666664) internal successors, (650), 12 states have internal predecessors, (650), 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) [2021-10-21 19:10:13,100 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:10:13,100 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2021-10-21 19:10:13,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-21 19:10:13,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-21 19:10:13,317 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 19:10:13,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:13,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1091792612, now seen corresponding path program 9 times [2021-10-21 19:10:13,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:13,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009205758] [2021-10-21 19:10:13,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:13,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:13,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:13,444 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:13,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:13,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009205758] [2021-10-21 19:10:13,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009205758] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:13,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099313951] [2021-10-21 19:10:13,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:10:13,446 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:10:13,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:10:13,447 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:10:13,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-21 19:10:13,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-21 19:10:13,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:10:13,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:10:13,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:10:14,030 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:14,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099313951] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:14,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:10:14,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-10-21 19:10:14,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070762107] [2021-10-21 19:10:14,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:10:14,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:14,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:10:14,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:10:14,033 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-21 19:10:14,034 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 147 transitions, 1980 flow. Second operand has 12 states, 12 states have (on average 54.166666666666664) internal successors, (650), 12 states have internal predecessors, (650), 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) [2021-10-21 19:10:14,035 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:10:14,035 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-21 19:10:14,035 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:10:14,321 INFO L129 PetriNetUnfolder]: 92/582 cut-off events. [2021-10-21 19:10:14,321 INFO L130 PetriNetUnfolder]: For 13798/13923 co-relation queries the response was YES. [2021-10-21 19:10:14,329 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2782 conditions, 582 events. 92/582 cut-off events. For 13798/13923 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3511 event pairs, 0 based on Foata normal form. 33/556 useless extension candidates. Maximal degree in co-relation 2685. Up to 116 conditions per place. [2021-10-21 19:10:14,337 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 86 selfloop transitions, 32 changer transitions 8/170 dead transitions. [2021-10-21 19:10:14,337 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 170 transitions, 2993 flow [2021-10-21 19:10:14,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:10:14,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-21 19:10:14,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 836 transitions. [2021-10-21 19:10:14,340 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8444444444444444 [2021-10-21 19:10:14,340 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 836 transitions. [2021-10-21 19:10:14,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 836 transitions. [2021-10-21 19:10:14,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:10:14,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 836 transitions. [2021-10-21 19:10:14,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 55.733333333333334) internal successors, (836), 15 states have internal predecessors, (836), 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) [2021-10-21 19:10:14,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 66.0) internal successors, (1056), 16 states have internal predecessors, (1056), 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) [2021-10-21 19:10:14,345 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 66.0) internal successors, (1056), 16 states have internal predecessors, (1056), 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) [2021-10-21 19:10:14,345 INFO L186 Difference]: Start difference. First operand has 195 places, 147 transitions, 1980 flow. Second operand 15 states and 836 transitions. [2021-10-21 19:10:14,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 170 transitions, 2993 flow [2021-10-21 19:10:14,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 170 transitions, 2424 flow, removed 240 selfloop flow, removed 20 redundant places. [2021-10-21 19:10:14,407 INFO L242 Difference]: Finished difference. Result has 189 places, 149 transitions, 1707 flow [2021-10-21 19:10:14,408 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1551, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1707, PETRI_PLACES=189, PETRI_TRANSITIONS=149} [2021-10-21 19:10:14,408 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 123 predicate places. [2021-10-21 19:10:14,408 INFO L470 AbstractCegarLoop]: Abstraction has has 189 places, 149 transitions, 1707 flow [2021-10-21 19:10:14,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.166666666666664) internal successors, (650), 12 states have internal predecessors, (650), 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) [2021-10-21 19:10:14,409 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:10:14,409 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2021-10-21 19:10:14,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-21 19:10:14,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:10:14,628 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 19:10:14,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:14,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1907855234, now seen corresponding path program 10 times [2021-10-21 19:10:14,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:14,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472709620] [2021-10-21 19:10:14,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:14,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:14,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:14,732 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:14,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:14,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472709620] [2021-10-21 19:10:14,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472709620] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:14,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149053016] [2021-10-21 19:10:14,733 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:10:14,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:10:14,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:10:14,734 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:10:14,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-21 19:10:15,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:10:15,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:10:15,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:10:15,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:10:15,282 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:15,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149053016] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:15,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:10:15,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-10-21 19:10:15,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472340150] [2021-10-21 19:10:15,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:10:15,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:15,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:10:15,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:10:15,286 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-21 19:10:15,286 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 149 transitions, 1707 flow. Second operand has 12 states, 12 states have (on average 54.166666666666664) internal successors, (650), 12 states have internal predecessors, (650), 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) [2021-10-21 19:10:15,287 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:10:15,287 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-21 19:10:15,287 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:10:15,585 INFO L129 PetriNetUnfolder]: 94/607 cut-off events. [2021-10-21 19:10:15,585 INFO L130 PetriNetUnfolder]: For 11129/11238 co-relation queries the response was YES. [2021-10-21 19:10:15,591 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2571 conditions, 607 events. 94/607 cut-off events. For 11129/11238 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3718 event pairs, 0 based on Foata normal form. 43/589 useless extension candidates. Maximal degree in co-relation 2477. Up to 108 conditions per place. [2021-10-21 19:10:15,598 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 60 selfloop transitions, 63 changer transitions 8/175 dead transitions. [2021-10-21 19:10:15,599 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 175 transitions, 2737 flow [2021-10-21 19:10:15,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-21 19:10:15,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-21 19:10:15,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1001 transitions. [2021-10-21 19:10:15,602 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8425925925925926 [2021-10-21 19:10:15,602 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1001 transitions. [2021-10-21 19:10:15,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1001 transitions. [2021-10-21 19:10:15,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:10:15,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1001 transitions. [2021-10-21 19:10:15,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 55.611111111111114) internal successors, (1001), 18 states have internal predecessors, (1001), 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) [2021-10-21 19:10:15,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 66.0) internal successors, (1254), 19 states have internal predecessors, (1254), 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) [2021-10-21 19:10:15,608 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 66.0) internal successors, (1254), 19 states have internal predecessors, (1254), 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) [2021-10-21 19:10:15,608 INFO L186 Difference]: Start difference. First operand has 189 places, 149 transitions, 1707 flow. Second operand 18 states and 1001 transitions. [2021-10-21 19:10:15,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 175 transitions, 2737 flow [2021-10-21 19:10:15,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 175 transitions, 2569 flow, removed 56 selfloop flow, removed 12 redundant places. [2021-10-21 19:10:15,655 INFO L242 Difference]: Finished difference. Result has 196 places, 151 transitions, 1829 flow [2021-10-21 19:10:15,655 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1597, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1829, PETRI_PLACES=196, PETRI_TRANSITIONS=151} [2021-10-21 19:10:15,656 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 130 predicate places. [2021-10-21 19:10:15,656 INFO L470 AbstractCegarLoop]: Abstraction has has 196 places, 151 transitions, 1829 flow [2021-10-21 19:10:15,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.166666666666664) internal successors, (650), 12 states have internal predecessors, (650), 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) [2021-10-21 19:10:15,656 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:10:15,657 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2021-10-21 19:10:15,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-21 19:10:15,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:10:15,870 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 19:10:15,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:15,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1754475826, now seen corresponding path program 11 times [2021-10-21 19:10:15,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:15,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683650619] [2021-10-21 19:10:15,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:15,871 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:15,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:15,973 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:15,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:15,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683650619] [2021-10-21 19:10:15,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683650619] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:15,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984414632] [2021-10-21 19:10:15,974 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:10:15,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:10:15,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:10:15,975 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:10:15,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-21 19:10:16,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-21 19:10:16,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:10:16,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:10:16,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:10:16,679 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:16,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984414632] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:16,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:10:16,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-10-21 19:10:16,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318666458] [2021-10-21 19:10:16,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:10:16,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:16,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:10:16,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:10:16,683 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-21 19:10:16,684 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 151 transitions, 1829 flow. Second operand has 13 states, 13 states have (on average 54.23076923076923) internal successors, (705), 13 states have internal predecessors, (705), 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) [2021-10-21 19:10:16,684 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:10:16,684 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-21 19:10:16,684 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:10:17,098 INFO L129 PetriNetUnfolder]: 97/620 cut-off events. [2021-10-21 19:10:17,099 INFO L130 PetriNetUnfolder]: For 11991/12114 co-relation queries the response was YES. [2021-10-21 19:10:17,106 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2729 conditions, 620 events. 97/620 cut-off events. For 11991/12114 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 3833 event pairs, 0 based on Foata normal form. 54/612 useless extension candidates. Maximal degree in co-relation 2633. Up to 114 conditions per place. [2021-10-21 19:10:17,113 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 45 selfloop transitions, 83 changer transitions 8/180 dead transitions. [2021-10-21 19:10:17,113 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 180 transitions, 2989 flow [2021-10-21 19:10:17,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-21 19:10:17,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-21 19:10:17,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1168 transitions. [2021-10-21 19:10:17,120 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8427128427128427 [2021-10-21 19:10:17,120 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1168 transitions. [2021-10-21 19:10:17,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1168 transitions. [2021-10-21 19:10:17,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:10:17,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1168 transitions. [2021-10-21 19:10:17,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 55.61904761904762) internal successors, (1168), 21 states have internal predecessors, (1168), 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) [2021-10-21 19:10:17,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 66.0) internal successors, (1452), 22 states have internal predecessors, (1452), 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) [2021-10-21 19:10:17,130 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 66.0) internal successors, (1452), 22 states have internal predecessors, (1452), 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) [2021-10-21 19:10:17,130 INFO L186 Difference]: Start difference. First operand has 196 places, 151 transitions, 1829 flow. Second operand 21 states and 1168 transitions. [2021-10-21 19:10:17,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 180 transitions, 2989 flow [2021-10-21 19:10:17,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 180 transitions, 2743 flow, removed 70 selfloop flow, removed 15 redundant places. [2021-10-21 19:10:17,187 INFO L242 Difference]: Finished difference. Result has 204 places, 156 transitions, 2025 flow [2021-10-21 19:10:17,188 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1667, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2025, PETRI_PLACES=204, PETRI_TRANSITIONS=156} [2021-10-21 19:10:17,188 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 138 predicate places. [2021-10-21 19:10:17,188 INFO L470 AbstractCegarLoop]: Abstraction has has 204 places, 156 transitions, 2025 flow [2021-10-21 19:10:17,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.23076923076923) internal successors, (705), 13 states have internal predecessors, (705), 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) [2021-10-21 19:10:17,190 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:10:17,190 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2021-10-21 19:10:17,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-21 19:10:17,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-21 19:10:17,403 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 19:10:17,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:17,403 INFO L82 PathProgramCache]: Analyzing trace with hash 335924868, now seen corresponding path program 12 times [2021-10-21 19:10:17,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:17,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420611539] [2021-10-21 19:10:17,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:17,404 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:17,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:17,495 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:17,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:17,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420611539] [2021-10-21 19:10:17,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420611539] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:17,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606831924] [2021-10-21 19:10:17,496 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:10:17,497 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:10:17,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:10:17,498 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:10:17,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-21 19:10:17,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-21 19:10:17,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:10:17,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:10:17,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:10:18,137 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:18,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606831924] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:18,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:10:18,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-10-21 19:10:18,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234276976] [2021-10-21 19:10:18,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:10:18,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:18,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:10:18,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:10:18,140 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-21 19:10:18,141 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 156 transitions, 2025 flow. Second operand has 13 states, 13 states have (on average 54.15384615384615) internal successors, (704), 13 states have internal predecessors, (704), 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) [2021-10-21 19:10:18,141 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:10:18,141 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-21 19:10:18,141 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:10:18,644 INFO L129 PetriNetUnfolder]: 109/689 cut-off events. [2021-10-21 19:10:18,645 INFO L130 PetriNetUnfolder]: For 15371/15481 co-relation queries the response was YES. [2021-10-21 19:10:18,652 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3234 conditions, 689 events. 109/689 cut-off events. For 15371/15481 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 4322 event pairs, 0 based on Foata normal form. 69/690 useless extension candidates. Maximal degree in co-relation 3135. Up to 130 conditions per place. [2021-10-21 19:10:18,661 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 39 selfloop transitions, 100 changer transitions 14/197 dead transitions. [2021-10-21 19:10:18,661 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 197 transitions, 3746 flow [2021-10-21 19:10:18,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-21 19:10:18,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-10-21 19:10:18,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1449 transitions. [2021-10-21 19:10:18,665 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8444055944055944 [2021-10-21 19:10:18,665 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1449 transitions. [2021-10-21 19:10:18,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1449 transitions. [2021-10-21 19:10:18,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:10:18,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1449 transitions. [2021-10-21 19:10:18,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 55.73076923076923) internal successors, (1449), 26 states have internal predecessors, (1449), 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) [2021-10-21 19:10:18,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 66.0) internal successors, (1782), 27 states have internal predecessors, (1782), 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) [2021-10-21 19:10:18,674 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 66.0) internal successors, (1782), 27 states have internal predecessors, (1782), 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) [2021-10-21 19:10:18,674 INFO L186 Difference]: Start difference. First operand has 204 places, 156 transitions, 2025 flow. Second operand 26 states and 1449 transitions. [2021-10-21 19:10:18,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 197 transitions, 3746 flow [2021-10-21 19:10:18,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 197 transitions, 3424 flow, removed 96 selfloop flow, removed 17 redundant places. [2021-10-21 19:10:18,737 INFO L242 Difference]: Finished difference. Result has 220 places, 168 transitions, 2440 flow [2021-10-21 19:10:18,738 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1797, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2440, PETRI_PLACES=220, PETRI_TRANSITIONS=168} [2021-10-21 19:10:18,738 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 154 predicate places. [2021-10-21 19:10:18,738 INFO L470 AbstractCegarLoop]: Abstraction has has 220 places, 168 transitions, 2440 flow [2021-10-21 19:10:18,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.15384615384615) internal successors, (704), 13 states have internal predecessors, (704), 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) [2021-10-21 19:10:18,739 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:10:18,739 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:18,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-21 19:10:18,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-21 19:10:18,946 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 19:10:18,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:18,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1777423792, now seen corresponding path program 13 times [2021-10-21 19:10:18,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:18,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789978808] [2021-10-21 19:10:18,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:18,947 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:18,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:19,054 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-21 19:10:19,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:19,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789978808] [2021-10-21 19:10:19,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789978808] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:19,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367017574] [2021-10-21 19:10:19,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:10:19,055 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:10:19,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:10:19,056 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:10:19,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-21 19:10:19,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:19,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:10:19,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:10:19,773 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-21 19:10:19,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367017574] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:19,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:10:19,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-10-21 19:10:19,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869675649] [2021-10-21 19:10:19,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:10:19,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:19,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:10:19,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:10:19,776 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-21 19:10:19,777 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 168 transitions, 2440 flow. Second operand has 13 states, 13 states have (on average 54.23076923076923) internal successors, (705), 13 states have internal predecessors, (705), 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) [2021-10-21 19:10:19,777 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:10:19,777 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-21 19:10:19,777 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:10:20,228 INFO L129 PetriNetUnfolder]: 122/762 cut-off events. [2021-10-21 19:10:20,228 INFO L130 PetriNetUnfolder]: For 26429/26580 co-relation queries the response was YES. [2021-10-21 19:10:20,238 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4068 conditions, 762 events. 122/762 cut-off events. For 26429/26580 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 5001 event pairs, 0 based on Foata normal form. 77/764 useless extension candidates. Maximal degree in co-relation 3961. Up to 148 conditions per place. [2021-10-21 19:10:20,248 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 61 selfloop transitions, 89 changer transitions 11/205 dead transitions. [2021-10-21 19:10:20,248 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 205 transitions, 4207 flow [2021-10-21 19:10:20,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-21 19:10:20,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-21 19:10:20,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1337 transitions. [2021-10-21 19:10:20,256 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8440656565656566 [2021-10-21 19:10:20,256 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1337 transitions. [2021-10-21 19:10:20,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1337 transitions. [2021-10-21 19:10:20,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:10:20,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1337 transitions. [2021-10-21 19:10:20,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 55.708333333333336) internal successors, (1337), 24 states have internal predecessors, (1337), 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) [2021-10-21 19:10:20,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 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) [2021-10-21 19:10:20,264 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 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) [2021-10-21 19:10:20,264 INFO L186 Difference]: Start difference. First operand has 220 places, 168 transitions, 2440 flow. Second operand 24 states and 1337 transitions. [2021-10-21 19:10:20,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 205 transitions, 4207 flow [2021-10-21 19:10:20,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 205 transitions, 3716 flow, removed 181 selfloop flow, removed 17 redundant places. [2021-10-21 19:10:20,355 INFO L242 Difference]: Finished difference. Result has 229 places, 186 transitions, 2825 flow [2021-10-21 19:10:20,355 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2056, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2825, PETRI_PLACES=229, PETRI_TRANSITIONS=186} [2021-10-21 19:10:20,355 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 163 predicate places. [2021-10-21 19:10:20,356 INFO L470 AbstractCegarLoop]: Abstraction has has 229 places, 186 transitions, 2825 flow [2021-10-21 19:10:20,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.23076923076923) internal successors, (705), 13 states have internal predecessors, (705), 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) [2021-10-21 19:10:20,356 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:10:20,356 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:20,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-21 19:10:20,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-21 19:10:20,557 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 19:10:20,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:20,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1801962500, now seen corresponding path program 14 times [2021-10-21 19:10:20,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:20,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939909181] [2021-10-21 19:10:20,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:20,558 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:20,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:20,671 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-21 19:10:20,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:20,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939909181] [2021-10-21 19:10:20,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939909181] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:20,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968394569] [2021-10-21 19:10:20,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:10:20,672 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:10:20,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:10:20,673 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:10:20,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-21 19:10:21,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:10:21,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:10:21,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:10:21,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:10:21,475 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-21 19:10:21,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968394569] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:21,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:10:21,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-10-21 19:10:21,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747953868] [2021-10-21 19:10:21,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-21 19:10:21,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:21,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-21 19:10:21,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:10:21,480 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-21 19:10:21,481 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 186 transitions, 2825 flow. Second operand has 14 states, 14 states have (on average 54.214285714285715) internal successors, (759), 14 states have internal predecessors, (759), 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) [2021-10-21 19:10:21,481 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:10:21,481 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-21 19:10:21,481 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:10:21,950 INFO L129 PetriNetUnfolder]: 129/816 cut-off events. [2021-10-21 19:10:21,950 INFO L130 PetriNetUnfolder]: For 29326/29457 co-relation queries the response was YES. [2021-10-21 19:10:21,958 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4363 conditions, 816 events. 129/816 cut-off events. For 29326/29457 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 5364 event pairs, 0 based on Foata normal form. 78/813 useless extension candidates. Maximal degree in co-relation 4251. Up to 154 conditions per place. [2021-10-21 19:10:21,969 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 49 selfloop transitions, 120 changer transitions 11/224 dead transitions. [2021-10-21 19:10:21,969 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 224 transitions, 4867 flow [2021-10-21 19:10:21,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-21 19:10:21,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-21 19:10:21,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1337 transitions. [2021-10-21 19:10:21,976 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8440656565656566 [2021-10-21 19:10:21,976 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1337 transitions. [2021-10-21 19:10:21,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1337 transitions. [2021-10-21 19:10:21,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:10:21,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1337 transitions. [2021-10-21 19:10:21,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 55.708333333333336) internal successors, (1337), 24 states have internal predecessors, (1337), 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) [2021-10-21 19:10:21,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 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) [2021-10-21 19:10:21,984 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 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) [2021-10-21 19:10:21,984 INFO L186 Difference]: Start difference. First operand has 229 places, 186 transitions, 2825 flow. Second operand 24 states and 1337 transitions. [2021-10-21 19:10:21,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 224 transitions, 4867 flow [2021-10-21 19:10:22,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 224 transitions, 4201 flow, removed 275 selfloop flow, removed 22 redundant places. [2021-10-21 19:10:22,092 INFO L242 Difference]: Finished difference. Result has 235 places, 197 transitions, 3092 flow [2021-10-21 19:10:22,092 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2399, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3092, PETRI_PLACES=235, PETRI_TRANSITIONS=197} [2021-10-21 19:10:22,093 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 169 predicate places. [2021-10-21 19:10:22,093 INFO L470 AbstractCegarLoop]: Abstraction has has 235 places, 197 transitions, 3092 flow [2021-10-21 19:10:22,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 54.214285714285715) internal successors, (759), 14 states have internal predecessors, (759), 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) [2021-10-21 19:10:22,093 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:10:22,094 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:22,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-21 19:10:22,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:10:22,318 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 19:10:22,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:22,319 INFO L82 PathProgramCache]: Analyzing trace with hash 910431551, now seen corresponding path program 15 times [2021-10-21 19:10:22,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:22,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992427619] [2021-10-21 19:10:22,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:22,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:22,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:22,444 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:22,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:22,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992427619] [2021-10-21 19:10:22,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992427619] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:22,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126732594] [2021-10-21 19:10:22,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:10:22,445 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:10:22,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:10:22,446 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:10:22,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-21 19:10:22,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-21 19:10:22,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:10:22,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-21 19:10:22,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:10:23,205 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:23,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126732594] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:23,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:10:23,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-10-21 19:10:23,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819511438] [2021-10-21 19:10:23,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 19:10:23,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:23,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:10:23,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:10:23,208 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-21 19:10:23,209 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 197 transitions, 3092 flow. Second operand has 15 states, 15 states have (on average 54.13333333333333) internal successors, (812), 15 states have internal predecessors, (812), 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) [2021-10-21 19:10:23,209 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:10:23,209 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-21 19:10:23,210 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:10:23,894 INFO L129 PetriNetUnfolder]: 151/946 cut-off events. [2021-10-21 19:10:23,894 INFO L130 PetriNetUnfolder]: For 37811/37978 co-relation queries the response was YES. [2021-10-21 19:10:23,904 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5340 conditions, 946 events. 151/946 cut-off events. For 37811/37978 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 6360 event pairs, 0 based on Foata normal form. 83/934 useless extension candidates. Maximal degree in co-relation 5227. Up to 178 conditions per place. [2021-10-21 19:10:23,913 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 68 selfloop transitions, 119 changer transitions 14/245 dead transitions. [2021-10-21 19:10:23,914 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 245 transitions, 5657 flow [2021-10-21 19:10:23,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-21 19:10:23,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-10-21 19:10:23,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1616 transitions. [2021-10-21 19:10:23,923 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8443051201671892 [2021-10-21 19:10:23,924 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1616 transitions. [2021-10-21 19:10:23,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1616 transitions. [2021-10-21 19:10:23,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:10:23,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1616 transitions. [2021-10-21 19:10:23,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.724137931034484) internal successors, (1616), 29 states have internal predecessors, (1616), 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) [2021-10-21 19:10:23,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 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) [2021-10-21 19:10:23,946 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 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) [2021-10-21 19:10:23,946 INFO L186 Difference]: Start difference. First operand has 235 places, 197 transitions, 3092 flow. Second operand 29 states and 1616 transitions. [2021-10-21 19:10:23,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 245 transitions, 5657 flow [2021-10-21 19:10:24,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 245 transitions, 5112 flow, removed 190 selfloop flow, removed 17 redundant places. [2021-10-21 19:10:24,052 INFO L242 Difference]: Finished difference. Result has 253 places, 221 transitions, 3895 flow [2021-10-21 19:10:24,052 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2668, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3895, PETRI_PLACES=253, PETRI_TRANSITIONS=221} [2021-10-21 19:10:24,053 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 187 predicate places. [2021-10-21 19:10:24,053 INFO L470 AbstractCegarLoop]: Abstraction has has 253 places, 221 transitions, 3895 flow [2021-10-21 19:10:24,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 54.13333333333333) internal successors, (812), 15 states have internal predecessors, (812), 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) [2021-10-21 19:10:24,053 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:10:24,053 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:24,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-10-21 19:10:24,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-21 19:10:24,254 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 19:10:24,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:24,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1848776937, now seen corresponding path program 16 times [2021-10-21 19:10:24,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:24,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123614414] [2021-10-21 19:10:24,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:24,255 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:24,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:24,369 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:24,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:24,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123614414] [2021-10-21 19:10:24,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123614414] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:24,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216536783] [2021-10-21 19:10:24,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:10:24,370 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:10:24,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:10:24,371 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:10:24,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-21 19:10:24,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:10:24,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:10:24,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-21 19:10:24,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:10:25,116 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:25,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216536783] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:25,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:10:25,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-10-21 19:10:25,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358915314] [2021-10-21 19:10:25,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-21 19:10:25,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:25,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-21 19:10:25,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:10:25,121 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-21 19:10:25,122 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 221 transitions, 3895 flow. Second operand has 16 states, 16 states have (on average 54.125) internal successors, (866), 16 states have internal predecessors, (866), 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) [2021-10-21 19:10:25,122 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:10:25,122 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-21 19:10:25,122 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:10:25,801 INFO L129 PetriNetUnfolder]: 161/1005 cut-off events. [2021-10-21 19:10:25,802 INFO L130 PetriNetUnfolder]: For 50082/50280 co-relation queries the response was YES. [2021-10-21 19:10:25,814 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6065 conditions, 1005 events. 161/1005 cut-off events. For 50082/50280 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 6761 event pairs, 0 based on Foata normal form. 83/988 useless extension candidates. Maximal degree in co-relation 5944. Up to 188 conditions per place. [2021-10-21 19:10:25,826 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 61 selfloop transitions, 150 changer transitions 14/269 dead transitions. [2021-10-21 19:10:25,826 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 269 transitions, 6877 flow [2021-10-21 19:10:25,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-21 19:10:25,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-10-21 19:10:25,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1616 transitions. [2021-10-21 19:10:25,830 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8443051201671892 [2021-10-21 19:10:25,830 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1616 transitions. [2021-10-21 19:10:25,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1616 transitions. [2021-10-21 19:10:25,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:10:25,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1616 transitions. [2021-10-21 19:10:25,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.724137931034484) internal successors, (1616), 29 states have internal predecessors, (1616), 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) [2021-10-21 19:10:25,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 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) [2021-10-21 19:10:25,838 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 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) [2021-10-21 19:10:25,838 INFO L186 Difference]: Start difference. First operand has 253 places, 221 transitions, 3895 flow. Second operand 29 states and 1616 transitions. [2021-10-21 19:10:25,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 269 transitions, 6877 flow [2021-10-21 19:10:25,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 269 transitions, 5783 flow, removed 480 selfloop flow, removed 23 redundant places. [2021-10-21 19:10:25,982 INFO L242 Difference]: Finished difference. Result has 265 places, 235 transitions, 4128 flow [2021-10-21 19:10:25,983 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3159, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=4128, PETRI_PLACES=265, PETRI_TRANSITIONS=235} [2021-10-21 19:10:25,983 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 199 predicate places. [2021-10-21 19:10:25,983 INFO L470 AbstractCegarLoop]: Abstraction has has 265 places, 235 transitions, 4128 flow [2021-10-21 19:10:25,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.125) internal successors, (866), 16 states have internal predecessors, (866), 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) [2021-10-21 19:10:25,984 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:10:25,984 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:26,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-21 19:10:26,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-21 19:10:26,210 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 19:10:26,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:26,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1430628198, now seen corresponding path program 17 times [2021-10-21 19:10:26,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:26,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190434657] [2021-10-21 19:10:26,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:26,211 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:26,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:26,347 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:26,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:26,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190434657] [2021-10-21 19:10:26,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190434657] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:26,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437107368] [2021-10-21 19:10:26,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:10:26,348 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:10:26,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:10:26,349 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:10:26,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-21 19:10:26,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-21 19:10:26,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:10:26,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-21 19:10:26,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:10:27,103 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:10:27,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437107368] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:27,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:10:27,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-10-21 19:10:27,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659555650] [2021-10-21 19:10:27,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-21 19:10:27,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:27,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-21 19:10:27,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:10:27,107 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-21 19:10:27,108 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 235 transitions, 4128 flow. Second operand has 17 states, 17 states have (on average 54.11764705882353) internal successors, (920), 17 states have internal predecessors, (920), 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) [2021-10-21 19:10:27,108 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:10:27,108 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-21 19:10:27,108 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:10:27,871 INFO L129 PetriNetUnfolder]: 171/1071 cut-off events. [2021-10-21 19:10:27,871 INFO L130 PetriNetUnfolder]: For 62041/62243 co-relation queries the response was YES. [2021-10-21 19:10:27,882 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6609 conditions, 1071 events. 171/1071 cut-off events. For 62041/62243 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 7174 event pairs, 0 based on Foata normal form. 86/1049 useless extension candidates. Maximal degree in co-relation 6484. Up to 178 conditions per place. [2021-10-21 19:10:27,894 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 65 selfloop transitions, 152 changer transitions 14/275 dead transitions. [2021-10-21 19:10:27,894 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 275 transitions, 7102 flow [2021-10-21 19:10:27,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-21 19:10:27,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-10-21 19:10:27,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1838 transitions. [2021-10-21 19:10:27,897 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8438934802571166 [2021-10-21 19:10:27,898 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1838 transitions. [2021-10-21 19:10:27,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1838 transitions. [2021-10-21 19:10:27,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:10:27,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1838 transitions. [2021-10-21 19:10:27,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 55.696969696969695) internal successors, (1838), 33 states have internal predecessors, (1838), 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) [2021-10-21 19:10:27,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 66.0) internal successors, (2244), 34 states have internal predecessors, (2244), 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) [2021-10-21 19:10:27,906 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 66.0) internal successors, (2244), 34 states have internal predecessors, (2244), 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) [2021-10-21 19:10:27,906 INFO L186 Difference]: Start difference. First operand has 265 places, 235 transitions, 4128 flow. Second operand 33 states and 1838 transitions. [2021-10-21 19:10:27,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 275 transitions, 7102 flow [2021-10-21 19:10:28,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 275 transitions, 6322 flow, removed 284 selfloop flow, removed 20 redundant places. [2021-10-21 19:10:28,100 INFO L242 Difference]: Finished difference. Result has 283 places, 249 transitions, 4657 flow [2021-10-21 19:10:28,100 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3506, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=4657, PETRI_PLACES=283, PETRI_TRANSITIONS=249} [2021-10-21 19:10:28,101 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 217 predicate places. [2021-10-21 19:10:28,101 INFO L470 AbstractCegarLoop]: Abstraction has has 283 places, 249 transitions, 4657 flow [2021-10-21 19:10:28,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 54.11764705882353) internal successors, (920), 17 states have internal predecessors, (920), 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) [2021-10-21 19:10:28,106 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:10:28,107 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:28,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-21 19:10:28,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-21 19:10:28,319 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 19:10:28,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:28,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1334764032, now seen corresponding path program 18 times [2021-10-21 19:10:28,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:28,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003505715] [2021-10-21 19:10:28,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:28,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:28,424 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 72 proven. 21 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-21 19:10:28,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:28,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003505715] [2021-10-21 19:10:28,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003505715] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:28,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667995692] [2021-10-21 19:10:28,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:10:28,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:10:28,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:10:28,426 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:10:28,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-21 19:10:29,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-21 19:10:29,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:10:29,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:10:29,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:10:29,237 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-21 19:10:29,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667995692] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:29,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:10:29,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-10-21 19:10:29,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238033410] [2021-10-21 19:10:29,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:10:29,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:29,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:10:29,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:10:29,240 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 66 [2021-10-21 19:10:29,241 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 249 transitions, 4657 flow. Second operand has 13 states, 13 states have (on average 56.76923076923077) internal successors, (738), 13 states have internal predecessors, (738), 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) [2021-10-21 19:10:29,241 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:10:29,241 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 66 [2021-10-21 19:10:29,241 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:10:30,196 INFO L129 PetriNetUnfolder]: 435/2584 cut-off events. [2021-10-21 19:10:30,196 INFO L130 PetriNetUnfolder]: For 99560/99685 co-relation queries the response was YES. [2021-10-21 19:10:30,235 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12586 conditions, 2584 events. 435/2584 cut-off events. For 99560/99685 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 24272 event pairs, 74 based on Foata normal form. 58/2387 useless extension candidates. Maximal degree in co-relation 12456. Up to 365 conditions per place. [2021-10-21 19:10:30,367 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 7 selfloop transitions, 21 changer transitions 0/264 dead transitions. [2021-10-21 19:10:30,367 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 264 transitions, 4511 flow [2021-10-21 19:10:30,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-21 19:10:30,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-21 19:10:30,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1019 transitions. [2021-10-21 19:10:30,369 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8577441077441077 [2021-10-21 19:10:30,370 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1019 transitions. [2021-10-21 19:10:30,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1019 transitions. [2021-10-21 19:10:30,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:10:30,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1019 transitions. [2021-10-21 19:10:30,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 56.611111111111114) internal successors, (1019), 18 states have internal predecessors, (1019), 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) [2021-10-21 19:10:30,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 66.0) internal successors, (1254), 19 states have internal predecessors, (1254), 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) [2021-10-21 19:10:30,375 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 66.0) internal successors, (1254), 19 states have internal predecessors, (1254), 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) [2021-10-21 19:10:30,375 INFO L186 Difference]: Start difference. First operand has 283 places, 249 transitions, 4657 flow. Second operand 18 states and 1019 transitions. [2021-10-21 19:10:30,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 264 transitions, 4511 flow [2021-10-21 19:10:30,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 264 transitions, 3697 flow, removed 309 selfloop flow, removed 25 redundant places. [2021-10-21 19:10:30,581 INFO L242 Difference]: Finished difference. Result has 271 places, 260 transitions, 3685 flow [2021-10-21 19:10:30,582 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3599, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3685, PETRI_PLACES=271, PETRI_TRANSITIONS=260} [2021-10-21 19:10:30,582 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 205 predicate places. [2021-10-21 19:10:30,582 INFO L470 AbstractCegarLoop]: Abstraction has has 271 places, 260 transitions, 3685 flow [2021-10-21 19:10:30,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.76923076923077) internal successors, (738), 13 states have internal predecessors, (738), 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) [2021-10-21 19:10:30,582 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-21 19:10:30,583 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:10:30,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-21 19:10:30,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:10:30,784 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-21 19:10:30,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:10:30,785 INFO L82 PathProgramCache]: Analyzing trace with hash -101909755, now seen corresponding path program 19 times [2021-10-21 19:10:30,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:10:30,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376810746] [2021-10-21 19:10:30,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:10:30,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:10:30,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:30,878 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 62 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 19:10:30,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:10:30,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376810746] [2021-10-21 19:10:30,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376810746] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:10:30,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486069180] [2021-10-21 19:10:30,882 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:10:30,883 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:10:30,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:10:30,884 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:10:30,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-21 19:10:31,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:10:31,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:10:31,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:10:31,703 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 19:10:31,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486069180] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:10:31,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:10:31,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-10-21 19:10:31,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527872758] [2021-10-21 19:10:31,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:10:31,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:10:31,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:10:31,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:10:31,705 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 66 [2021-10-21 19:10:31,706 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 260 transitions, 3685 flow. Second operand has 13 states, 13 states have (on average 56.76923076923077) internal successors, (738), 13 states have internal predecessors, (738), 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) [2021-10-21 19:10:31,706 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-21 19:10:31,706 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 66 [2021-10-21 19:10:31,707 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-21 19:10:33,972 INFO L129 PetriNetUnfolder]: 1419/7124 cut-off events. [2021-10-21 19:10:33,972 INFO L130 PetriNetUnfolder]: For 282384/282687 co-relation queries the response was YES. [2021-10-21 19:10:34,056 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36081 conditions, 7124 events. 1419/7124 cut-off events. For 282384/282687 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 85923 event pairs, 272 based on Foata normal form. 191/7017 useless extension candidates. Maximal degree in co-relation 35966. Up to 945 conditions per place. [2021-10-21 19:10:34,062 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 0 selfloop transitions, 0 changer transitions 263/263 dead transitions. [2021-10-21 19:10:34,063 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 263 transitions, 3501 flow [2021-10-21 19:10:34,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-21 19:10:34,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-21 19:10:34,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1019 transitions. [2021-10-21 19:10:34,065 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8577441077441077 [2021-10-21 19:10:34,066 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1019 transitions. [2021-10-21 19:10:34,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1019 transitions. [2021-10-21 19:10:34,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:10:34,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1019 transitions. [2021-10-21 19:10:34,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 56.611111111111114) internal successors, (1019), 18 states have internal predecessors, (1019), 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) [2021-10-21 19:10:34,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 66.0) internal successors, (1254), 19 states have internal predecessors, (1254), 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) [2021-10-21 19:10:34,071 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 66.0) internal successors, (1254), 19 states have internal predecessors, (1254), 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) [2021-10-21 19:10:34,071 INFO L186 Difference]: Start difference. First operand has 271 places, 260 transitions, 3685 flow. Second operand 18 states and 1019 transitions. [2021-10-21 19:10:34,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 263 transitions, 3501 flow [2021-10-21 19:10:34,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 263 transitions, 3125 flow, removed 44 selfloop flow, removed 24 redundant places. [2021-10-21 19:10:34,458 INFO L242 Difference]: Finished difference. Result has 261 places, 0 transitions, 0 flow [2021-10-21 19:10:34,458 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3027, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=0, PETRI_PLACES=261, PETRI_TRANSITIONS=0} [2021-10-21 19:10:34,458 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 195 predicate places. [2021-10-21 19:10:34,459 INFO L470 AbstractCegarLoop]: Abstraction has has 261 places, 0 transitions, 0 flow [2021-10-21 19:10:34,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.76923076923077) internal successors, (738), 13 states have internal predecessors, (738), 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) [2021-10-21 19:10:34,461 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:10:34,462 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-21 19:10:34,462 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-21 19:10:34,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-10-21 19:10:34,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-21 19:10:34,683 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-21 19:10:34,683 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:10:34,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:10:34 BasicIcfg [2021-10-21 19:10:34,685 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:10:34,685 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:10:34,685 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:10:34,686 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:10:34,686 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:09:57" (3/4) ... [2021-10-21 19:10:34,689 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-21 19:10:34,698 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2021-10-21 19:10:34,698 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2021-10-21 19:10:34,704 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-10-21 19:10:34,704 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-21 19:10:34,704 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-21 19:10:34,705 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 19:10:34,727 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:10:34,728 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:10:34,729 INFO L168 Benchmark]: Toolchain (without parser) took 37964.72 ms. Allocated memory was 90.2 MB in the beginning and 801.1 MB in the end (delta: 710.9 MB). Free memory was 52.0 MB in the beginning and 464.8 MB in the end (delta: -412.9 MB). Peak memory consumption was 296.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:10:34,729 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 90.2 MB. Free memory is still 69.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:10:34,730 INFO L168 Benchmark]: CACSL2BoogieTranslator took 699.54 ms. Allocated memory was 90.2 MB in the beginning and 125.8 MB in the end (delta: 35.7 MB). Free memory was 51.8 MB in the beginning and 91.7 MB in the end (delta: -39.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-21 19:10:34,730 INFO L168 Benchmark]: Boogie Procedure Inliner took 69.89 ms. Allocated memory is still 125.8 MB. Free memory was 91.7 MB in the beginning and 90.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:10:34,731 INFO L168 Benchmark]: Boogie Preprocessor took 51.86 ms. Allocated memory is still 125.8 MB. Free memory was 90.2 MB in the beginning and 89.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:10:34,731 INFO L168 Benchmark]: RCFGBuilder took 340.07 ms. Allocated memory is still 125.8 MB. Free memory was 89.0 MB in the beginning and 77.0 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-21 19:10:34,732 INFO L168 Benchmark]: TraceAbstraction took 36754.48 ms. Allocated memory was 125.8 MB in the beginning and 801.1 MB in the end (delta: 675.3 MB). Free memory was 76.4 MB in the beginning and 467.2 MB in the end (delta: -390.8 MB). Peak memory consumption was 318.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:10:34,732 INFO L168 Benchmark]: Witness Printer took 42.40 ms. Allocated memory is still 801.1 MB. Free memory was 467.2 MB in the beginning and 464.8 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:10:34,734 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 90.2 MB. Free memory is still 69.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 699.54 ms. Allocated memory was 90.2 MB in the beginning and 125.8 MB in the end (delta: 35.7 MB). Free memory was 51.8 MB in the beginning and 91.7 MB in the end (delta: -39.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 69.89 ms. Allocated memory is still 125.8 MB. Free memory was 91.7 MB in the beginning and 90.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 51.86 ms. Allocated memory is still 125.8 MB. Free memory was 90.2 MB in the beginning and 89.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 340.07 ms. Allocated memory is still 125.8 MB. Free memory was 89.0 MB in the beginning and 77.0 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 36754.48 ms. Allocated memory was 125.8 MB in the beginning and 801.1 MB in the end (delta: 675.3 MB). Free memory was 76.4 MB in the beginning and 467.2 MB in the end (delta: -390.8 MB). Peak memory consumption was 318.5 MB. Max. memory is 16.1 GB. * Witness Printer took 42.40 ms. Allocated memory is still 801.1 MB. Free memory was 467.2 MB in the beginning and 464.8 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 722]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 26.4ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 36570.6ms, OverallIterations: 29, TraceHistogramMax: 6, EmptinessCheckTime: 0.0ms, AutomataDifference: 14612.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 66.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 141 SDtfs, 705 SDslu, 298 SDs, 0 SdLazy, 2618 SolverSat, 855 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1654.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1953 GetRequests, 1375 SyntacticMatches, 0 SemanticMatches, 578 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2759 ImplicationChecksByTransitivity, 4886.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4657occurred in iteration=27, InterpolantAutomatonStates: 509, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 272.5ms SsaConstructionTime, 876.3ms SatisfiabilityAnalysisTime, 8444.9ms InterpolantComputationTime, 2970 NumberOfCodeBlocks, 2970 NumberOfCodeBlocksAsserted, 87 NumberOfCheckSat, 2918 ConstructedInterpolants, 0 QuantifiedInterpolants, 9798 SizeOfPredicates, 154 NumberOfNonLiveVariables, 3442 ConjunctsInSsa, 263 ConjunctsInUnsatCore, 52 InterpolantComputations, 8 PerfectInterpolantSequences, 360/1194 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-21 19:10:34,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af070303-dffe-4cad-bbab-bdf61581d0e8/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...