./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longest-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU --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 874fb84f685baf0441a9bf8db1864605baa10908128545fe3028b9b499246108 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 23:19:28,186 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 23:19:28,188 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 23:19:28,276 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 23:19:28,279 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 23:19:28,287 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 23:19:28,289 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 23:19:28,294 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 23:19:28,299 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 23:19:28,306 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 23:19:28,308 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 23:19:28,311 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 23:19:28,312 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 23:19:28,316 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 23:19:28,319 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 23:19:28,322 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 23:19:28,325 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 23:19:28,326 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 23:19:28,334 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 23:19:28,343 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 23:19:28,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 23:19:28,349 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 23:19:28,353 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 23:19:28,355 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 23:19:28,362 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 23:19:28,363 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 23:19:28,363 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 23:19:28,366 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 23:19:28,366 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 23:19:28,368 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 23:19:28,369 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 23:19:28,371 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 23:19:28,373 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 23:19:28,375 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 23:19:28,377 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 23:19:28,377 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 23:19:28,378 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 23:19:28,379 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 23:19:28,379 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 23:19:28,380 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 23:19:28,381 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 23:19:28,383 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 23:19:28,446 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 23:19:28,449 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 23:19:28,450 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 23:19:28,450 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 23:19:28,452 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 23:19:28,453 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 23:19:28,453 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 23:19:28,454 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 23:19:28,454 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 23:19:28,454 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 23:19:28,455 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 23:19:28,456 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 23:19:28,456 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 23:19:28,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 23:19:28,457 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 23:19:28,457 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 23:19:28,457 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 23:19:28,458 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 23:19:28,458 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 23:19:28,458 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 23:19:28,459 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 23:19:28,459 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 23:19:28,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:19:28,459 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 23:19:28,460 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 23:19:28,460 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 23:19:28,460 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 23:19:28,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 23:19:28,461 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 23:19:28,463 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 23:19:28,463 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 23:19:28,464 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 23:19:28,464 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_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 874fb84f685baf0441a9bf8db1864605baa10908128545fe3028b9b499246108 [2021-11-02 23:19:28,857 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 23:19:28,893 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 23:19:28,897 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 23:19:28,899 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 23:19:28,900 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 23:19:28,901 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/pthread/triangular-longest-2.i [2021-11-02 23:19:29,017 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/data/86e42ce09/319a4474acd6472fb696ea3cc8310ac7/FLAG920c73098 [2021-11-02 23:19:29,879 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 23:19:29,880 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/sv-benchmarks/c/pthread/triangular-longest-2.i [2021-11-02 23:19:29,898 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/data/86e42ce09/319a4474acd6472fb696ea3cc8310ac7/FLAG920c73098 [2021-11-02 23:19:30,078 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/data/86e42ce09/319a4474acd6472fb696ea3cc8310ac7 [2021-11-02 23:19:30,081 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 23:19:30,083 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 23:19:30,089 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 23:19:30,090 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 23:19:30,094 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 23:19:30,095 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:19:30" (1/1) ... [2021-11-02 23:19:30,097 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7851013b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:19:30, skipping insertion in model container [2021-11-02 23:19:30,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:19:30" (1/1) ... [2021-11-02 23:19:30,105 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 23:19:30,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 23:19:30,768 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_ae325a81-e9f6-4de8-a1b1-a525b8519b91/sv-benchmarks/c/pthread/triangular-longest-2.i[30964,30977] [2021-11-02 23:19:30,775 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:19:30,787 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 23:19:30,871 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_ae325a81-e9f6-4de8-a1b1-a525b8519b91/sv-benchmarks/c/pthread/triangular-longest-2.i[30964,30977] [2021-11-02 23:19:30,873 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:19:30,934 INFO L208 MainTranslator]: Completed translation [2021-11-02 23:19:30,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:19:30 WrapperNode [2021-11-02 23:19:30,936 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 23:19:30,937 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 23:19:30,937 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 23:19:30,938 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 23:19:30,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:19:30" (1/1) ... [2021-11-02 23:19:30,990 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:19:30" (1/1) ... [2021-11-02 23:19:31,022 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 23:19:31,023 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 23:19:31,024 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 23:19:31,024 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 23:19:31,035 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:19:30" (1/1) ... [2021-11-02 23:19:31,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:19:30" (1/1) ... [2021-11-02 23:19:31,043 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:19:30" (1/1) ... [2021-11-02 23:19:31,043 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:19:30" (1/1) ... [2021-11-02 23:19:31,060 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:19:30" (1/1) ... [2021-11-02 23:19:31,072 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:19:30" (1/1) ... [2021-11-02 23:19:31,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:19:30" (1/1) ... [2021-11-02 23:19:31,086 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 23:19:31,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 23:19:31,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 23:19:31,093 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 23:19:31,094 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:19:30" (1/1) ... [2021-11-02 23:19:31,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:19:31,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:31,137 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 23:19:31,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 23:19:31,203 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-11-02 23:19:31,203 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-11-02 23:19:31,204 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-11-02 23:19:31,204 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-11-02 23:19:31,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 23:19:31,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-02 23:19:31,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 23:19:31,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 23:19:31,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 23:19:31,206 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-02 23:19:31,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 23:19:31,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 23:19:31,208 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-02 23:19:31,540 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 23:19:31,540 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-02 23:19:31,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:19:31 BoogieIcfgContainer [2021-11-02 23:19:31,544 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 23:19:31,562 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 23:19:31,562 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 23:19:31,566 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 23:19:31,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:19:30" (1/3) ... [2021-11-02 23:19:31,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@444d0ad0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:19:31, skipping insertion in model container [2021-11-02 23:19:31,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:19:30" (2/3) ... [2021-11-02 23:19:31,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@444d0ad0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:19:31, skipping insertion in model container [2021-11-02 23:19:31,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:19:31" (3/3) ... [2021-11-02 23:19:31,570 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2021-11-02 23:19:31,577 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-02 23:19:31,577 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 23:19:31,578 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 23:19:31,578 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-02 23:19:31,648 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,649 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,649 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,650 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,651 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,651 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,651 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,651 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,652 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,653 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,654 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,654 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,655 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,656 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,657 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,657 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,658 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,658 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,659 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,660 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,660 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,661 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,661 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,661 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,662 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,662 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,663 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,664 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,665 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,666 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,667 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,667 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,668 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,668 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,668 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,669 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,669 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,670 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,670 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,671 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,671 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,671 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,672 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,672 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,675 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,675 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,676 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,676 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,678 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,678 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,679 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,679 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,679 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,679 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,683 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,683 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,687 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,688 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,688 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,689 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,689 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,689 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,696 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,696 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,697 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,697 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,697 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,698 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 23:19:31,701 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-11-02 23:19:31,763 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 23:19:31,772 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 23:19:31,772 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-02 23:19:31,788 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 68 places, 66 transitions, 142 flow [2021-11-02 23:19:31,844 INFO L129 PetriNetUnfolder]: 5/64 cut-off events. [2021-11-02 23:19:31,850 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-02 23:19:31,859 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. [2021-11-02 23:19:31,860 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 66 transitions, 142 flow [2021-11-02 23:19:31,870 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 64 transitions, 134 flow [2021-11-02 23:19:31,918 INFO L129 PetriNetUnfolder]: 3/52 cut-off events. [2021-11-02 23:19:31,919 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-02 23:19:31,919 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:19:31,921 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] [2021-11-02 23:19:31,922 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:19:31,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:31,934 INFO L85 PathProgramCache]: Analyzing trace with hash 2112281486, now seen corresponding path program 1 times [2021-11-02 23:19:31,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:31,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484225529] [2021-11-02 23:19:31,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:31,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:32,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:32,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:32,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:32,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484225529] [2021-11-02 23:19:32,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484225529] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:19:32,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:19:32,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 23:19:32,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717185389] [2021-11-02 23:19:32,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:19:32,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:32,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:19:32,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:19:32,582 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:19:32,587 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) [2021-11-02 23:19:32,587 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:19:32,587 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:19:32,589 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:19:32,902 INFO L129 PetriNetUnfolder]: 39/220 cut-off events. [2021-11-02 23:19:32,912 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-02 23:19:32,916 INFO L84 FinitePrefix]: Finished finitePrefix Result has 294 conditions, 220 events. 39/220 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 984 event pairs, 0 based on Foata normal form. 40/235 useless extension candidates. Maximal degree in co-relation 265. Up to 26 conditions per place. [2021-11-02 23:19:32,919 INFO L132 encePairwiseOnDemand]: 55/66 looper letters, 16 selfloop transitions, 9 changer transitions 5/81 dead transitions. [2021-11-02 23:19:32,919 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 81 transitions, 228 flow [2021-11-02 23:19:32,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 23:19:32,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-11-02 23:19:32,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 473 transitions. [2021-11-02 23:19:32,947 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8958333333333334 [2021-11-02 23:19:32,948 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 473 transitions. [2021-11-02 23:19:32,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 473 transitions. [2021-11-02 23:19:32,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:19:32,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 473 transitions. [2021-11-02 23:19:32,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 59.125) internal successors, (473), 8 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:33,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 66.0) internal successors, (594), 9 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:33,015 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 66.0) internal successors, (594), 9 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:33,018 INFO L186 Difference]: Start difference. First operand has 66 places, 64 transitions, 134 flow. Second operand 8 states and 473 transitions. [2021-11-02 23:19:33,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 81 transitions, 228 flow [2021-11-02 23:19:33,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 81 transitions, 226 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-11-02 23:19:33,039 INFO L242 Difference]: Finished difference. Result has 77 places, 67 transitions, 198 flow [2021-11-02 23:19:33,041 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=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=198, PETRI_PLACES=77, PETRI_TRANSITIONS=67} [2021-11-02 23:19:33,042 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 11 predicate places. [2021-11-02 23:19:33,042 INFO L470 AbstractCegarLoop]: Abstraction has has 77 places, 67 transitions, 198 flow [2021-11-02 23:19:33,043 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) [2021-11-02 23:19:33,043 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:19:33,044 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] [2021-11-02 23:19:33,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 23:19:33,044 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:19:33,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:33,046 INFO L85 PathProgramCache]: Analyzing trace with hash 263941995, now seen corresponding path program 1 times [2021-11-02 23:19:33,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:33,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832377973] [2021-11-02 23:19:33,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:33,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:33,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:33,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:33,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:33,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832377973] [2021-11-02 23:19:33,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832377973] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:19:33,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:19:33,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 23:19:33,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751698795] [2021-11-02 23:19:33,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:19:33,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:33,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:19:33,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:19:33,300 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:19:33,301 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 67 transitions, 198 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) [2021-11-02 23:19:33,302 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:19:33,302 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:19:33,302 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:19:33,591 INFO L129 PetriNetUnfolder]: 55/271 cut-off events. [2021-11-02 23:19:33,592 INFO L130 PetriNetUnfolder]: For 298/325 co-relation queries the response was YES. [2021-11-02 23:19:33,595 INFO L84 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 271 events. 55/271 cut-off events. For 298/325 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1215 event pairs, 0 based on Foata normal form. 9/259 useless extension candidates. Maximal degree in co-relation 540. Up to 42 conditions per place. [2021-11-02 23:19:33,598 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 19 selfloop transitions, 11 changer transitions 30/104 dead transitions. [2021-11-02 23:19:33,599 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 104 transitions, 540 flow [2021-11-02 23:19:33,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 23:19:33,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-02 23:19:33,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 568 transitions. [2021-11-02 23:19:33,621 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8606060606060606 [2021-11-02 23:19:33,624 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 568 transitions. [2021-11-02 23:19:33,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 568 transitions. [2021-11-02 23:19:33,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:19:33,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 568 transitions. [2021-11-02 23:19:33,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 56.8) internal successors, (568), 10 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:33,645 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) [2021-11-02 23:19:33,649 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) [2021-11-02 23:19:33,649 INFO L186 Difference]: Start difference. First operand has 77 places, 67 transitions, 198 flow. Second operand 10 states and 568 transitions. [2021-11-02 23:19:33,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 104 transitions, 540 flow [2021-11-02 23:19:33,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 104 transitions, 526 flow, removed 4 selfloop flow, removed 2 redundant places. [2021-11-02 23:19:33,660 INFO L242 Difference]: Finished difference. Result has 91 places, 66 transitions, 285 flow [2021-11-02 23:19:33,665 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=285, PETRI_PLACES=91, PETRI_TRANSITIONS=66} [2021-11-02 23:19:33,665 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 25 predicate places. [2021-11-02 23:19:33,666 INFO L470 AbstractCegarLoop]: Abstraction has has 91 places, 66 transitions, 285 flow [2021-11-02 23:19:33,666 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) [2021-11-02 23:19:33,667 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:19:33,667 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] [2021-11-02 23:19:33,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 23:19:33,669 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:19:33,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:33,677 INFO L85 PathProgramCache]: Analyzing trace with hash 2041180881, now seen corresponding path program 2 times [2021-11-02 23:19:33,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:33,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792154471] [2021-11-02 23:19:33,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:33,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:33,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:33,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:33,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792154471] [2021-11-02 23:19:33,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792154471] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:19:33,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:19:33,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 23:19:33,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438895958] [2021-11-02 23:19:33,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:19:33,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:33,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:19:33,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:19:33,942 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:19:33,943 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 66 transitions, 285 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) [2021-11-02 23:19:33,943 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:19:33,943 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:19:33,944 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:19:34,142 INFO L129 PetriNetUnfolder]: 35/183 cut-off events. [2021-11-02 23:19:34,142 INFO L130 PetriNetUnfolder]: For 839/896 co-relation queries the response was YES. [2021-11-02 23:19:34,145 INFO L84 FinitePrefix]: Finished finitePrefix Result has 527 conditions, 183 events. 35/183 cut-off events. For 839/896 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 610 event pairs, 0 based on Foata normal form. 27/193 useless extension candidates. Maximal degree in co-relation 481. Up to 35 conditions per place. [2021-11-02 23:19:34,147 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 16 selfloop transitions, 12 changer transitions 11/83 dead transitions. [2021-11-02 23:19:34,148 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 83 transitions, 565 flow [2021-11-02 23:19:34,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 23:19:34,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-02 23:19:34,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 503 transitions. [2021-11-02 23:19:34,151 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8468013468013468 [2021-11-02 23:19:34,152 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 503 transitions. [2021-11-02 23:19:34,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 503 transitions. [2021-11-02 23:19:34,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:19:34,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 503 transitions. [2021-11-02 23:19:34,179 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) [2021-11-02 23:19:34,183 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) [2021-11-02 23:19:34,185 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) [2021-11-02 23:19:34,185 INFO L186 Difference]: Start difference. First operand has 91 places, 66 transitions, 285 flow. Second operand 9 states and 503 transitions. [2021-11-02 23:19:34,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 83 transitions, 565 flow [2021-11-02 23:19:34,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 83 transitions, 492 flow, removed 33 selfloop flow, removed 5 redundant places. [2021-11-02 23:19:34,210 INFO L242 Difference]: Finished difference. Result has 85 places, 68 transitions, 325 flow [2021-11-02 23:19:34,211 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=325, PETRI_PLACES=85, PETRI_TRANSITIONS=68} [2021-11-02 23:19:34,211 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 19 predicate places. [2021-11-02 23:19:34,211 INFO L470 AbstractCegarLoop]: Abstraction has has 85 places, 68 transitions, 325 flow [2021-11-02 23:19:34,213 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) [2021-11-02 23:19:34,213 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:19:34,213 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] [2021-11-02 23:19:34,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 23:19:34,214 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:19:34,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:34,217 INFO L85 PathProgramCache]: Analyzing trace with hash 418425126, now seen corresponding path program 1 times [2021-11-02 23:19:34,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:34,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243192784] [2021-11-02 23:19:34,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:34,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:34,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:34,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:34,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:34,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243192784] [2021-11-02 23:19:34,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243192784] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:19:34,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:19:34,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 23:19:34,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700831970] [2021-11-02 23:19:34,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:19:34,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:34,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:19:34,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:19:34,454 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:19:34,455 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 68 transitions, 325 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) [2021-11-02 23:19:34,455 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:19:34,455 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:19:34,456 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:19:34,671 INFO L129 PetriNetUnfolder]: 41/221 cut-off events. [2021-11-02 23:19:34,671 INFO L130 PetriNetUnfolder]: For 911/960 co-relation queries the response was YES. [2021-11-02 23:19:34,675 INFO L84 FinitePrefix]: Finished finitePrefix Result has 634 conditions, 221 events. 41/221 cut-off events. For 911/960 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 777 event pairs, 0 based on Foata normal form. 18/218 useless extension candidates. Maximal degree in co-relation 585. Up to 41 conditions per place. [2021-11-02 23:19:34,681 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 18 selfloop transitions, 20 changer transitions 8/90 dead transitions. [2021-11-02 23:19:34,681 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 90 transitions, 675 flow [2021-11-02 23:19:34,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 23:19:34,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-11-02 23:19:34,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 620 transitions. [2021-11-02 23:19:34,686 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8539944903581267 [2021-11-02 23:19:34,687 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 620 transitions. [2021-11-02 23:19:34,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 620 transitions. [2021-11-02 23:19:34,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:19:34,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 620 transitions. [2021-11-02 23:19:34,692 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) [2021-11-02 23:19:34,695 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) [2021-11-02 23:19:34,696 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) [2021-11-02 23:19:34,696 INFO L186 Difference]: Start difference. First operand has 85 places, 68 transitions, 325 flow. Second operand 11 states and 620 transitions. [2021-11-02 23:19:34,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 90 transitions, 675 flow [2021-11-02 23:19:34,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 90 transitions, 578 flow, removed 38 selfloop flow, removed 8 redundant places. [2021-11-02 23:19:34,713 INFO L242 Difference]: Finished difference. Result has 91 places, 73 transitions, 410 flow [2021-11-02 23:19:34,713 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=410, PETRI_PLACES=91, PETRI_TRANSITIONS=73} [2021-11-02 23:19:34,714 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 25 predicate places. [2021-11-02 23:19:34,714 INFO L470 AbstractCegarLoop]: Abstraction has has 91 places, 73 transitions, 410 flow [2021-11-02 23:19:34,715 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) [2021-11-02 23:19:34,715 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:19:34,715 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] [2021-11-02 23:19:34,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 23:19:34,716 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:19:34,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:34,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1863597102, now seen corresponding path program 2 times [2021-11-02 23:19:34,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:34,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497455179] [2021-11-02 23:19:34,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:34,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:34,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:34,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:34,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:34,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497455179] [2021-11-02 23:19:34,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497455179] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:19:34,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:19:34,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 23:19:34,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136168071] [2021-11-02 23:19:34,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:19:34,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:34,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:19:34,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:19:34,906 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:19:34,907 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 73 transitions, 410 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) [2021-11-02 23:19:34,907 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:19:34,908 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:19:34,908 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:19:35,160 INFO L129 PetriNetUnfolder]: 36/206 cut-off events. [2021-11-02 23:19:35,160 INFO L130 PetriNetUnfolder]: For 1026/1089 co-relation queries the response was YES. [2021-11-02 23:19:35,163 INFO L84 FinitePrefix]: Finished finitePrefix Result has 618 conditions, 206 events. 36/206 cut-off events. For 1026/1089 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 748 event pairs, 0 based on Foata normal form. 26/212 useless extension candidates. Maximal degree in co-relation 573. Up to 40 conditions per place. [2021-11-02 23:19:35,167 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 16 selfloop transitions, 22 changer transitions 11/93 dead transitions. [2021-11-02 23:19:35,167 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 93 transitions, 776 flow [2021-11-02 23:19:35,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 23:19:35,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-11-02 23:19:35,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 670 transitions. [2021-11-02 23:19:35,172 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8459595959595959 [2021-11-02 23:19:35,172 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 670 transitions. [2021-11-02 23:19:35,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 670 transitions. [2021-11-02 23:19:35,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:19:35,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 670 transitions. [2021-11-02 23:19:35,177 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) [2021-11-02 23:19:35,180 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) [2021-11-02 23:19:35,181 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) [2021-11-02 23:19:35,182 INFO L186 Difference]: Start difference. First operand has 91 places, 73 transitions, 410 flow. Second operand 12 states and 670 transitions. [2021-11-02 23:19:35,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 93 transitions, 776 flow [2021-11-02 23:19:35,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 93 transitions, 702 flow, removed 21 selfloop flow, removed 7 redundant places. [2021-11-02 23:19:35,197 INFO L242 Difference]: Finished difference. Result has 98 places, 76 transitions, 488 flow [2021-11-02 23:19:35,198 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=488, PETRI_PLACES=98, PETRI_TRANSITIONS=76} [2021-11-02 23:19:35,198 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 32 predicate places. [2021-11-02 23:19:35,199 INFO L470 AbstractCegarLoop]: Abstraction has has 98 places, 76 transitions, 488 flow [2021-11-02 23:19:35,199 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) [2021-11-02 23:19:35,199 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:19:35,200 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] [2021-11-02 23:19:35,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 23:19:35,200 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:19:35,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:35,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1644889195, now seen corresponding path program 1 times [2021-11-02 23:19:35,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:35,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576929604] [2021-11-02 23:19:35,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:35,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:35,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:35,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:35,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:35,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576929604] [2021-11-02 23:19:35,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576929604] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:35,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032562442] [2021-11-02 23:19:35,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:35,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:35,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:35,441 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:35,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 23:19:35,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:35,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 23:19:35,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:36,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:36,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032562442] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:36,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:36,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-02 23:19:36,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504333220] [2021-11-02 23:19:36,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 23:19:36,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:36,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 23:19:36,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:19:36,058 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:19:36,059 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 76 transitions, 488 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) [2021-11-02 23:19:36,060 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:19:36,060 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:19:36,060 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:19:36,230 INFO L129 PetriNetUnfolder]: 36/206 cut-off events. [2021-11-02 23:19:36,230 INFO L130 PetriNetUnfolder]: For 1306/1371 co-relation queries the response was YES. [2021-11-02 23:19:36,232 INFO L84 FinitePrefix]: Finished finitePrefix Result has 667 conditions, 206 events. 36/206 cut-off events. For 1306/1371 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 714 event pairs, 0 based on Foata normal form. 31/217 useless extension candidates. Maximal degree in co-relation 617. Up to 42 conditions per place. [2021-11-02 23:19:36,236 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 27 selfloop transitions, 13 changer transitions 8/92 dead transitions. [2021-11-02 23:19:36,236 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 92 transitions, 839 flow [2021-11-02 23:19:36,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 23:19:36,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-11-02 23:19:36,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 615 transitions. [2021-11-02 23:19:36,241 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8471074380165289 [2021-11-02 23:19:36,241 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 615 transitions. [2021-11-02 23:19:36,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 615 transitions. [2021-11-02 23:19:36,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:19:36,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 615 transitions. [2021-11-02 23:19:36,245 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) [2021-11-02 23:19:36,250 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) [2021-11-02 23:19:36,251 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) [2021-11-02 23:19:36,251 INFO L186 Difference]: Start difference. First operand has 98 places, 76 transitions, 488 flow. Second operand 11 states and 615 transitions. [2021-11-02 23:19:36,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 92 transitions, 839 flow [2021-11-02 23:19:36,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 92 transitions, 737 flow, removed 30 selfloop flow, removed 10 redundant places. [2021-11-02 23:19:36,266 INFO L242 Difference]: Finished difference. Result has 100 places, 78 transitions, 484 flow [2021-11-02 23:19:36,267 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=484, PETRI_PLACES=100, PETRI_TRANSITIONS=78} [2021-11-02 23:19:36,267 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 34 predicate places. [2021-11-02 23:19:36,267 INFO L470 AbstractCegarLoop]: Abstraction has has 100 places, 78 transitions, 484 flow [2021-11-02 23:19:36,270 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) [2021-11-02 23:19:36,271 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:19:36,271 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] [2021-11-02 23:19:36,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:36,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:36,484 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:19:36,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:36,485 INFO L85 PathProgramCache]: Analyzing trace with hash 290887513, now seen corresponding path program 2 times [2021-11-02 23:19:36,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:36,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843304403] [2021-11-02 23:19:36,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:36,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:36,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:36,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:36,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:36,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843304403] [2021-11-02 23:19:36,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843304403] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:36,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540962998] [2021-11-02 23:19:36,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:19:36,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:36,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:36,698 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:36,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 23:19:36,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:19:36,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:36,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 23:19:36,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:37,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:37,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540962998] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:37,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:37,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-11-02 23:19:37,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442866785] [2021-11-02 23:19:37,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 23:19:37,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:37,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 23:19:37,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:19:37,166 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:19:37,167 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 78 transitions, 484 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) [2021-11-02 23:19:37,168 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:19:37,168 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:19:37,168 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:19:37,441 INFO L129 PetriNetUnfolder]: 42/245 cut-off events. [2021-11-02 23:19:37,441 INFO L130 PetriNetUnfolder]: For 1722/1795 co-relation queries the response was YES. [2021-11-02 23:19:37,444 INFO L84 FinitePrefix]: Finished finitePrefix Result has 809 conditions, 245 events. 42/245 cut-off events. For 1722/1795 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 971 event pairs, 0 based on Foata normal form. 31/252 useless extension candidates. Maximal degree in co-relation 755. Up to 52 conditions per place. [2021-11-02 23:19:37,447 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 27 selfloop transitions, 21 changer transitions 8/100 dead transitions. [2021-11-02 23:19:37,448 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 100 transitions, 953 flow [2021-11-02 23:19:37,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 23:19:37,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-02 23:19:37,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 782 transitions. [2021-11-02 23:19:37,453 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8463203463203464 [2021-11-02 23:19:37,453 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 782 transitions. [2021-11-02 23:19:37,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 782 transitions. [2021-11-02 23:19:37,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:19:37,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 782 transitions. [2021-11-02 23:19:37,458 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) [2021-11-02 23:19:37,462 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) [2021-11-02 23:19:37,463 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) [2021-11-02 23:19:37,463 INFO L186 Difference]: Start difference. First operand has 100 places, 78 transitions, 484 flow. Second operand 14 states and 782 transitions. [2021-11-02 23:19:37,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 100 transitions, 953 flow [2021-11-02 23:19:37,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 100 transitions, 847 flow, removed 42 selfloop flow, removed 8 redundant places. [2021-11-02 23:19:37,479 INFO L242 Difference]: Finished difference. Result has 110 places, 86 transitions, 600 flow [2021-11-02 23:19:37,479 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=600, PETRI_PLACES=110, PETRI_TRANSITIONS=86} [2021-11-02 23:19:37,480 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 44 predicate places. [2021-11-02 23:19:37,480 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 86 transitions, 600 flow [2021-11-02 23:19:37,481 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) [2021-11-02 23:19:37,481 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:19:37,481 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] [2021-11-02 23:19:37,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:37,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-02 23:19:37,705 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:19:37,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:37,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1190358857, now seen corresponding path program 3 times [2021-11-02 23:19:37,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:37,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444647749] [2021-11-02 23:19:37,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:37,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:37,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:37,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:37,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:37,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444647749] [2021-11-02 23:19:37,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444647749] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:37,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113342094] [2021-11-02 23:19:37,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:19:37,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:37,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:37,863 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:37,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 23:19:38,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-02 23:19:38,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:38,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 23:19:38,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:38,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:38,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113342094] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:38,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:38,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-02 23:19:38,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712117657] [2021-11-02 23:19:38,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 23:19:38,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:38,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 23:19:38,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:19:38,267 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:19:38,268 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 86 transitions, 600 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) [2021-11-02 23:19:38,268 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:19:38,268 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:19:38,269 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:19:38,522 INFO L129 PetriNetUnfolder]: 57/327 cut-off events. [2021-11-02 23:19:38,522 INFO L130 PetriNetUnfolder]: For 3026/3131 co-relation queries the response was YES. [2021-11-02 23:19:38,525 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1190 conditions, 327 events. 57/327 cut-off events. For 3026/3131 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1519 event pairs, 0 based on Foata normal form. 39/333 useless extension candidates. Maximal degree in co-relation 1130. Up to 72 conditions per place. [2021-11-02 23:19:38,530 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 33 selfloop transitions, 26 changer transitions 8/111 dead transitions. [2021-11-02 23:19:38,531 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 111 transitions, 1218 flow [2021-11-02 23:19:38,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 23:19:38,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-11-02 23:19:38,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 842 transitions. [2021-11-02 23:19:38,535 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8505050505050505 [2021-11-02 23:19:38,536 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 842 transitions. [2021-11-02 23:19:38,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 842 transitions. [2021-11-02 23:19:38,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:19:38,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 842 transitions. [2021-11-02 23:19:38,541 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) [2021-11-02 23:19:38,545 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) [2021-11-02 23:19:38,546 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) [2021-11-02 23:19:38,546 INFO L186 Difference]: Start difference. First operand has 110 places, 86 transitions, 600 flow. Second operand 15 states and 842 transitions. [2021-11-02 23:19:38,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 111 transitions, 1218 flow [2021-11-02 23:19:38,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 111 transitions, 1088 flow, removed 65 selfloop flow, removed 3 redundant places. [2021-11-02 23:19:38,564 INFO L242 Difference]: Finished difference. Result has 125 places, 92 transitions, 744 flow [2021-11-02 23:19:38,565 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=744, PETRI_PLACES=125, PETRI_TRANSITIONS=92} [2021-11-02 23:19:38,565 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 59 predicate places. [2021-11-02 23:19:38,565 INFO L470 AbstractCegarLoop]: Abstraction has has 125 places, 92 transitions, 744 flow [2021-11-02 23:19:38,566 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) [2021-11-02 23:19:38,566 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:19:38,566 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] [2021-11-02 23:19:38,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:38,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-02 23:19:38,793 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:19:38,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:38,794 INFO L85 PathProgramCache]: Analyzing trace with hash 831099873, now seen corresponding path program 4 times [2021-11-02 23:19:38,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:38,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855304089] [2021-11-02 23:19:38,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:38,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:38,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:38,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:38,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:38,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855304089] [2021-11-02 23:19:38,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855304089] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:38,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912044138] [2021-11-02 23:19:38,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:19:38,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:38,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:38,957 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:38,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 23:19:39,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:19:39,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:39,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 23:19:39,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:39,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:39,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912044138] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:39,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:39,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-11-02 23:19:39,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166963325] [2021-11-02 23:19:39,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 23:19:39,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:39,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 23:19:39,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:19:39,483 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:19:39,484 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 92 transitions, 744 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) [2021-11-02 23:19:39,484 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:19:39,484 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:19:39,484 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:19:39,898 INFO L129 PetriNetUnfolder]: 58/343 cut-off events. [2021-11-02 23:19:39,899 INFO L130 PetriNetUnfolder]: For 4203/4304 co-relation queries the response was YES. [2021-11-02 23:19:39,903 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1368 conditions, 343 events. 58/343 cut-off events. For 4203/4304 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1639 event pairs, 0 based on Foata normal form. 46/355 useless extension candidates. Maximal degree in co-relation 1302. Up to 74 conditions per place. [2021-11-02 23:19:39,908 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 29 selfloop transitions, 34 changer transitions 17/124 dead transitions. [2021-11-02 23:19:39,908 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 124 transitions, 1668 flow [2021-11-02 23:19:39,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 23:19:39,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-11-02 23:19:39,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1116 transitions. [2021-11-02 23:19:39,916 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8454545454545455 [2021-11-02 23:19:39,917 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1116 transitions. [2021-11-02 23:19:39,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1116 transitions. [2021-11-02 23:19:39,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:19:39,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1116 transitions. [2021-11-02 23:19:39,926 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) [2021-11-02 23:19:39,933 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) [2021-11-02 23:19:39,934 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) [2021-11-02 23:19:39,934 INFO L186 Difference]: Start difference. First operand has 125 places, 92 transitions, 744 flow. Second operand 20 states and 1116 transitions. [2021-11-02 23:19:39,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 124 transitions, 1668 flow [2021-11-02 23:19:39,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 124 transitions, 1438 flow, removed 98 selfloop flow, removed 10 redundant places. [2021-11-02 23:19:39,960 INFO L242 Difference]: Finished difference. Result has 141 places, 99 transitions, 920 flow [2021-11-02 23:19:39,960 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=636, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=920, PETRI_PLACES=141, PETRI_TRANSITIONS=99} [2021-11-02 23:19:39,961 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 75 predicate places. [2021-11-02 23:19:39,961 INFO L470 AbstractCegarLoop]: Abstraction has has 141 places, 99 transitions, 920 flow [2021-11-02 23:19:39,961 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) [2021-11-02 23:19:39,962 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:19:39,962 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] [2021-11-02 23:19:40,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:40,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:40,185 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:19:40,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:40,186 INFO L85 PathProgramCache]: Analyzing trace with hash 672940227, now seen corresponding path program 1 times [2021-11-02 23:19:40,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:40,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636553105] [2021-11-02 23:19:40,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:40,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:40,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:40,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:40,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:40,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636553105] [2021-11-02 23:19:40,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636553105] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:40,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129066290] [2021-11-02 23:19:40,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:40,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:40,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:40,354 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:40,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 23:19:40,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:40,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 23:19:40,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:40,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:40,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129066290] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:40,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:40,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-11-02 23:19:40,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505420797] [2021-11-02 23:19:40,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 23:19:40,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:40,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 23:19:40,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:19:40,789 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:19:40,790 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 99 transitions, 920 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) [2021-11-02 23:19:40,790 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:19:40,790 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:19:40,790 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:19:41,036 INFO L129 PetriNetUnfolder]: 54/330 cut-off events. [2021-11-02 23:19:41,037 INFO L130 PetriNetUnfolder]: For 5857/5979 co-relation queries the response was YES. [2021-11-02 23:19:41,041 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1428 conditions, 330 events. 54/330 cut-off events. For 5857/5979 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1534 event pairs, 0 based on Foata normal form. 33/330 useless extension candidates. Maximal degree in co-relation 1354. Up to 68 conditions per place. [2021-11-02 23:19:41,046 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 39 selfloop transitions, 25 changer transitions 8/116 dead transitions. [2021-11-02 23:19:41,047 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 116 transitions, 1594 flow [2021-11-02 23:19:41,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 23:19:41,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-11-02 23:19:41,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 726 transitions. [2021-11-02 23:19:41,050 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8461538461538461 [2021-11-02 23:19:41,050 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 726 transitions. [2021-11-02 23:19:41,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 726 transitions. [2021-11-02 23:19:41,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:19:41,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 726 transitions. [2021-11-02 23:19:41,054 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) [2021-11-02 23:19:41,057 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) [2021-11-02 23:19:41,058 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) [2021-11-02 23:19:41,058 INFO L186 Difference]: Start difference. First operand has 141 places, 99 transitions, 920 flow. Second operand 13 states and 726 transitions. [2021-11-02 23:19:41,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 116 transitions, 1594 flow [2021-11-02 23:19:41,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 116 transitions, 1370 flow, removed 85 selfloop flow, removed 15 redundant places. [2021-11-02 23:19:41,089 INFO L242 Difference]: Finished difference. Result has 138 places, 101 transitions, 860 flow [2021-11-02 23:19:41,091 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=724, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=860, PETRI_PLACES=138, PETRI_TRANSITIONS=101} [2021-11-02 23:19:41,091 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 72 predicate places. [2021-11-02 23:19:41,092 INFO L470 AbstractCegarLoop]: Abstraction has has 138 places, 101 transitions, 860 flow [2021-11-02 23:19:41,092 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) [2021-11-02 23:19:41,093 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:19:41,093 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] [2021-11-02 23:19:41,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:41,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-02 23:19:41,309 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:19:41,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:41,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1124861891, now seen corresponding path program 2 times [2021-11-02 23:19:41,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:41,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679510238] [2021-11-02 23:19:41,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:41,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:41,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:41,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:41,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:41,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679510238] [2021-11-02 23:19:41,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679510238] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:41,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066798431] [2021-11-02 23:19:41,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:19:41,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:41,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:41,446 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:41,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 23:19:41,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:19:41,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:41,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 23:19:41,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:41,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:41,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066798431] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:41,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:41,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-11-02 23:19:41,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178524992] [2021-11-02 23:19:41,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 23:19:41,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:41,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 23:19:41,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:19:41,903 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:19:41,904 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 101 transitions, 860 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) [2021-11-02 23:19:41,904 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:19:41,905 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:19:41,905 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:19:42,175 INFO L129 PetriNetUnfolder]: 69/411 cut-off events. [2021-11-02 23:19:42,175 INFO L130 PetriNetUnfolder]: For 8096/8211 co-relation queries the response was YES. [2021-11-02 23:19:42,180 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1880 conditions, 411 events. 69/411 cut-off events. For 8096/8211 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2120 event pairs, 0 based on Foata normal form. 37/409 useless extension candidates. Maximal degree in co-relation 1806. Up to 84 conditions per place. [2021-11-02 23:19:42,187 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 31 selfloop transitions, 45 changer transitions 8/128 dead transitions. [2021-11-02 23:19:42,187 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 128 transitions, 1852 flow [2021-11-02 23:19:42,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 23:19:42,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-02 23:19:42,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 895 transitions. [2021-11-02 23:19:42,191 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8475378787878788 [2021-11-02 23:19:42,191 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 895 transitions. [2021-11-02 23:19:42,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 895 transitions. [2021-11-02 23:19:42,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:19:42,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 895 transitions. [2021-11-02 23:19:42,198 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) [2021-11-02 23:19:42,240 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) [2021-11-02 23:19:42,241 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) [2021-11-02 23:19:42,241 INFO L186 Difference]: Start difference. First operand has 138 places, 101 transitions, 860 flow. Second operand 16 states and 895 transitions. [2021-11-02 23:19:42,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 128 transitions, 1852 flow [2021-11-02 23:19:42,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 128 transitions, 1560 flow, removed 125 selfloop flow, removed 12 redundant places. [2021-11-02 23:19:42,272 INFO L242 Difference]: Finished difference. Result has 145 places, 107 transitions, 1051 flow [2021-11-02 23:19:42,273 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1051, PETRI_PLACES=145, PETRI_TRANSITIONS=107} [2021-11-02 23:19:42,273 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 79 predicate places. [2021-11-02 23:19:42,274 INFO L470 AbstractCegarLoop]: Abstraction has has 145 places, 107 transitions, 1051 flow [2021-11-02 23:19:42,274 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) [2021-11-02 23:19:42,274 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:19:42,275 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] [2021-11-02 23:19:42,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:42,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:42,501 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:19:42,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:42,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1890704053, now seen corresponding path program 3 times [2021-11-02 23:19:42,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:42,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315598879] [2021-11-02 23:19:42,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:42,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:42,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:42,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:42,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:42,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315598879] [2021-11-02 23:19:42,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315598879] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:42,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347879990] [2021-11-02 23:19:42,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:19:42,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:42,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:42,631 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:42,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 23:19:42,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 23:19:42,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:42,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 23:19:42,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:43,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:43,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347879990] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:43,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:43,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-02 23:19:43,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225635537] [2021-11-02 23:19:43,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 23:19:43,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:43,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 23:19:43,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:19:43,135 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:19:43,136 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 107 transitions, 1051 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) [2021-11-02 23:19:43,136 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:19:43,136 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:19:43,136 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:19:43,520 INFO L129 PetriNetUnfolder]: 64/390 cut-off events. [2021-11-02 23:19:43,520 INFO L130 PetriNetUnfolder]: For 7749/7893 co-relation queries the response was YES. [2021-11-02 23:19:43,525 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1768 conditions, 390 events. 64/390 cut-off events. For 7749/7893 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1997 event pairs, 0 based on Foata normal form. 47/399 useless extension candidates. Maximal degree in co-relation 1692. Up to 80 conditions per place. [2021-11-02 23:19:43,531 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 25 selfloop transitions, 51 changer transitions 11/131 dead transitions. [2021-11-02 23:19:43,531 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 131 transitions, 2003 flow [2021-11-02 23:19:43,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 23:19:43,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-02 23:19:43,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 892 transitions. [2021-11-02 23:19:43,534 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8446969696969697 [2021-11-02 23:19:43,535 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 892 transitions. [2021-11-02 23:19:43,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 892 transitions. [2021-11-02 23:19:43,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:19:43,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 892 transitions. [2021-11-02 23:19:43,544 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) [2021-11-02 23:19:43,547 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) [2021-11-02 23:19:43,548 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) [2021-11-02 23:19:43,549 INFO L186 Difference]: Start difference. First operand has 145 places, 107 transitions, 1051 flow. Second operand 16 states and 892 transitions. [2021-11-02 23:19:43,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 131 transitions, 2003 flow [2021-11-02 23:19:43,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 131 transitions, 1792 flow, removed 77 selfloop flow, removed 11 redundant places. [2021-11-02 23:19:43,586 INFO L242 Difference]: Finished difference. Result has 152 places, 110 transitions, 1167 flow [2021-11-02 23:19:43,587 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=924, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1167, PETRI_PLACES=152, PETRI_TRANSITIONS=110} [2021-11-02 23:19:43,587 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 86 predicate places. [2021-11-02 23:19:43,588 INFO L470 AbstractCegarLoop]: Abstraction has has 152 places, 110 transitions, 1167 flow [2021-11-02 23:19:43,588 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) [2021-11-02 23:19:43,589 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:19:43,589 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] [2021-11-02 23:19:43,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:43,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-02 23:19:43,809 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:19:43,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:43,809 INFO L85 PathProgramCache]: Analyzing trace with hash 823614762, now seen corresponding path program 4 times [2021-11-02 23:19:43,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:43,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687846330] [2021-11-02 23:19:43,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:43,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:43,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:43,949 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:43,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:43,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687846330] [2021-11-02 23:19:43,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687846330] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:43,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926118432] [2021-11-02 23:19:43,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:19:43,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:43,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:43,952 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:43,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 23:19:44,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:19:44,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:44,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 23:19:44,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:44,555 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:44,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926118432] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:44,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:44,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-02 23:19:44,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946143769] [2021-11-02 23:19:44,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:19:44,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:44,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:19:44,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:19:44,562 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:19:44,563 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 110 transitions, 1167 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) [2021-11-02 23:19:44,564 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:19:44,564 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:19:44,564 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:19:44,795 INFO L129 PetriNetUnfolder]: 64/397 cut-off events. [2021-11-02 23:19:44,798 INFO L130 PetriNetUnfolder]: For 7877/7995 co-relation queries the response was YES. [2021-11-02 23:19:44,803 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1813 conditions, 397 events. 64/397 cut-off events. For 7877/7995 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2035 event pairs, 0 based on Foata normal form. 39/397 useless extension candidates. Maximal degree in co-relation 1734. Up to 87 conditions per place. [2021-11-02 23:19:44,810 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 60 selfloop transitions, 15 changer transitions 8/127 dead transitions. [2021-11-02 23:19:44,810 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 127 transitions, 1931 flow [2021-11-02 23:19:44,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 23:19:44,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-11-02 23:19:44,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 725 transitions. [2021-11-02 23:19:44,813 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.844988344988345 [2021-11-02 23:19:44,813 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 725 transitions. [2021-11-02 23:19:44,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 725 transitions. [2021-11-02 23:19:44,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:19:44,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 725 transitions. [2021-11-02 23:19:44,816 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) [2021-11-02 23:19:44,822 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) [2021-11-02 23:19:44,822 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) [2021-11-02 23:19:44,823 INFO L186 Difference]: Start difference. First operand has 152 places, 110 transitions, 1167 flow. Second operand 13 states and 725 transitions. [2021-11-02 23:19:44,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 127 transitions, 1931 flow [2021-11-02 23:19:44,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 127 transitions, 1732 flow, removed 56 selfloop flow, removed 14 redundant places. [2021-11-02 23:19:44,856 INFO L242 Difference]: Finished difference. Result has 152 places, 112 transitions, 1120 flow [2021-11-02 23:19:44,856 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1002, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1120, PETRI_PLACES=152, PETRI_TRANSITIONS=112} [2021-11-02 23:19:44,857 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 86 predicate places. [2021-11-02 23:19:44,857 INFO L470 AbstractCegarLoop]: Abstraction has has 152 places, 112 transitions, 1120 flow [2021-11-02 23:19:44,857 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) [2021-11-02 23:19:44,858 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:19:44,858 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] [2021-11-02 23:19:44,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:45,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-02 23:19:45,073 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:19:45,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:45,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1156057902, now seen corresponding path program 5 times [2021-11-02 23:19:45,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:45,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022560150] [2021-11-02 23:19:45,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:45,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:45,242 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:45,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:45,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022560150] [2021-11-02 23:19:45,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022560150] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:45,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780456519] [2021-11-02 23:19:45,243 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:19:45,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:45,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:45,245 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:45,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 23:19:45,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-02 23:19:45,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:45,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 23:19:45,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:45,895 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:45,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780456519] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:45,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:45,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-11-02 23:19:45,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422778547] [2021-11-02 23:19:45,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 23:19:45,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:45,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 23:19:45,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:19:45,899 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:19:45,900 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 112 transitions, 1120 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) [2021-11-02 23:19:45,900 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:19:45,901 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:19:45,901 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:19:46,219 INFO L129 PetriNetUnfolder]: 66/415 cut-off events. [2021-11-02 23:19:46,219 INFO L130 PetriNetUnfolder]: For 8921/9038 co-relation queries the response was YES. [2021-11-02 23:19:46,224 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1893 conditions, 415 events. 66/415 cut-off events. For 8921/9038 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2153 event pairs, 0 based on Foata normal form. 41/414 useless extension candidates. Maximal degree in co-relation 1814. Up to 82 conditions per place. [2021-11-02 23:19:46,230 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 53 selfloop transitions, 25 changer transitions 8/130 dead transitions. [2021-11-02 23:19:46,230 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 130 transitions, 1956 flow [2021-11-02 23:19:46,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 23:19:46,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-02 23:19:46,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 892 transitions. [2021-11-02 23:19:46,233 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8446969696969697 [2021-11-02 23:19:46,234 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 892 transitions. [2021-11-02 23:19:46,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 892 transitions. [2021-11-02 23:19:46,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:19:46,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 892 transitions. [2021-11-02 23:19:46,238 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) [2021-11-02 23:19:46,241 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) [2021-11-02 23:19:46,242 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) [2021-11-02 23:19:46,242 INFO L186 Difference]: Start difference. First operand has 152 places, 112 transitions, 1120 flow. Second operand 16 states and 892 transitions. [2021-11-02 23:19:46,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 130 transitions, 1956 flow [2021-11-02 23:19:46,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 130 transitions, 1728 flow, removed 101 selfloop flow, removed 10 redundant places. [2021-11-02 23:19:46,279 INFO L242 Difference]: Finished difference. Result has 159 places, 114 transitions, 1160 flow [2021-11-02 23:19:46,280 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1024, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1160, PETRI_PLACES=159, PETRI_TRANSITIONS=114} [2021-11-02 23:19:46,280 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 93 predicate places. [2021-11-02 23:19:46,280 INFO L470 AbstractCegarLoop]: Abstraction has has 159 places, 114 transitions, 1160 flow [2021-11-02 23:19:46,281 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) [2021-11-02 23:19:46,281 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:19:46,281 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] [2021-11-02 23:19:46,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:46,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-02 23:19:46,501 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:19:46,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:46,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1517059746, now seen corresponding path program 6 times [2021-11-02 23:19:46,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:46,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36659209] [2021-11-02 23:19:46,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:46,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:46,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:46,653 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:46,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:46,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36659209] [2021-11-02 23:19:46,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36659209] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:46,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365917336] [2021-11-02 23:19:46,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:19:46,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:46,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:46,656 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:46,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 23:19:46,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-02 23:19:46,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:46,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 23:19:46,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:47,243 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:47,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365917336] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:47,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:47,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-02 23:19:47,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019620936] [2021-11-02 23:19:47,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:19:47,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:47,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:19:47,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:19:47,249 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:19:47,251 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 114 transitions, 1160 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) [2021-11-02 23:19:47,251 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:19:47,251 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:19:47,251 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:19:47,592 INFO L129 PetriNetUnfolder]: 68/433 cut-off events. [2021-11-02 23:19:47,592 INFO L130 PetriNetUnfolder]: For 7966/8073 co-relation queries the response was YES. [2021-11-02 23:19:47,597 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1893 conditions, 433 events. 68/433 cut-off events. For 7966/8073 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2303 event pairs, 0 based on Foata normal form. 44/433 useless extension candidates. Maximal degree in co-relation 1812. Up to 86 conditions per place. [2021-11-02 23:19:47,604 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 49 selfloop transitions, 32 changer transitions 8/133 dead transitions. [2021-11-02 23:19:47,604 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 133 transitions, 1980 flow [2021-11-02 23:19:47,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 23:19:47,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-11-02 23:19:47,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 948 transitions. [2021-11-02 23:19:47,607 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8449197860962567 [2021-11-02 23:19:47,607 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 948 transitions. [2021-11-02 23:19:47,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 948 transitions. [2021-11-02 23:19:47,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:19:47,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 948 transitions. [2021-11-02 23:19:47,612 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) [2021-11-02 23:19:47,615 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) [2021-11-02 23:19:47,616 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) [2021-11-02 23:19:47,616 INFO L186 Difference]: Start difference. First operand has 159 places, 114 transitions, 1160 flow. Second operand 17 states and 948 transitions. [2021-11-02 23:19:47,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 133 transitions, 1980 flow [2021-11-02 23:19:47,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 133 transitions, 1816 flow, removed 61 selfloop flow, removed 13 redundant places. [2021-11-02 23:19:47,652 INFO L242 Difference]: Finished difference. Result has 164 places, 116 transitions, 1226 flow [2021-11-02 23:19:47,653 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1072, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1226, PETRI_PLACES=164, PETRI_TRANSITIONS=116} [2021-11-02 23:19:47,653 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 98 predicate places. [2021-11-02 23:19:47,654 INFO L470 AbstractCegarLoop]: Abstraction has has 164 places, 116 transitions, 1226 flow [2021-11-02 23:19:47,654 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) [2021-11-02 23:19:47,654 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:19:47,655 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] [2021-11-02 23:19:47,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:47,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-02 23:19:47,869 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:19:47,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:47,869 INFO L85 PathProgramCache]: Analyzing trace with hash -547396332, now seen corresponding path program 7 times [2021-11-02 23:19:47,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:47,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958814054] [2021-11-02 23:19:47,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:47,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:47,989 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:47,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:47,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958814054] [2021-11-02 23:19:47,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958814054] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:47,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253302379] [2021-11-02 23:19:47,990 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:19:47,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:47,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:47,992 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:48,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 23:19:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:48,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 23:19:48,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:48,593 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:48,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253302379] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:48,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:48,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-02 23:19:48,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403998547] [2021-11-02 23:19:48,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:19:48,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:48,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:19:48,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:19:48,597 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:19:48,598 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 116 transitions, 1226 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) [2021-11-02 23:19:48,599 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:19:48,599 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:19:48,599 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:19:49,023 INFO L129 PetriNetUnfolder]: 86/520 cut-off events. [2021-11-02 23:19:49,023 INFO L130 PetriNetUnfolder]: For 10312/10461 co-relation queries the response was YES. [2021-11-02 23:19:49,029 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2414 conditions, 520 events. 86/520 cut-off events. For 10312/10461 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2918 event pairs, 0 based on Foata normal form. 49/516 useless extension candidates. Maximal degree in co-relation 2331. Up to 110 conditions per place. [2021-11-02 23:19:49,037 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 40 selfloop transitions, 56 changer transitions 8/148 dead transitions. [2021-11-02 23:19:49,037 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 148 transitions, 2368 flow [2021-11-02 23:19:49,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 23:19:49,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-11-02 23:19:49,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1117 transitions. [2021-11-02 23:19:49,041 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8462121212121212 [2021-11-02 23:19:49,041 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1117 transitions. [2021-11-02 23:19:49,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1117 transitions. [2021-11-02 23:19:49,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:19:49,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1117 transitions. [2021-11-02 23:19:49,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 55.85) internal successors, (1117), 20 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:49,050 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) [2021-11-02 23:19:49,051 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) [2021-11-02 23:19:49,052 INFO L186 Difference]: Start difference. First operand has 164 places, 116 transitions, 1226 flow. Second operand 20 states and 1117 transitions. [2021-11-02 23:19:49,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 148 transitions, 2368 flow [2021-11-02 23:19:49,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 148 transitions, 2152 flow, removed 82 selfloop flow, removed 14 redundant places. [2021-11-02 23:19:49,095 INFO L242 Difference]: Finished difference. Result has 175 places, 125 transitions, 1548 flow [2021-11-02 23:19:49,095 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1128, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1548, PETRI_PLACES=175, PETRI_TRANSITIONS=125} [2021-11-02 23:19:49,096 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 109 predicate places. [2021-11-02 23:19:49,096 INFO L470 AbstractCegarLoop]: Abstraction has has 175 places, 125 transitions, 1548 flow [2021-11-02 23:19:49,097 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) [2021-11-02 23:19:49,097 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:19:49,097 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] [2021-11-02 23:19:49,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:49,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 23:19:49,325 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:19:49,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:49,325 INFO L85 PathProgramCache]: Analyzing trace with hash -863268282, now seen corresponding path program 8 times [2021-11-02 23:19:49,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:49,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282668361] [2021-11-02 23:19:49,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:49,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:49,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:49,460 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:49,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:49,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282668361] [2021-11-02 23:19:49,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282668361] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:49,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737705070] [2021-11-02 23:19:49,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:19:49,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:49,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:49,463 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:49,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 23:19:49,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:19:49,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:49,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 23:19:49,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:50,109 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:50,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737705070] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:50,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:50,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-11-02 23:19:50,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503800227] [2021-11-02 23:19:50,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 23:19:50,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:50,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 23:19:50,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:19:50,114 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:19:50,115 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 125 transitions, 1548 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) [2021-11-02 23:19:50,115 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:19:50,115 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:19:50,115 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:19:50,740 INFO L129 PetriNetUnfolder]: 92/559 cut-off events. [2021-11-02 23:19:50,741 INFO L130 PetriNetUnfolder]: For 13074/13244 co-relation queries the response was YES. [2021-11-02 23:19:50,748 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2783 conditions, 559 events. 92/559 cut-off events. For 13074/13244 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3294 event pairs, 0 based on Foata normal form. 50/553 useless extension candidates. Maximal degree in co-relation 2693. Up to 122 conditions per place. [2021-11-02 23:19:50,758 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 39 selfloop transitions, 66 changer transitions 17/166 dead transitions. [2021-11-02 23:19:50,758 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 166 transitions, 3137 flow [2021-11-02 23:19:50,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 23:19:50,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-11-02 23:19:50,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1338 transitions. [2021-11-02 23:19:50,765 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8446969696969697 [2021-11-02 23:19:50,766 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1338 transitions. [2021-11-02 23:19:50,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1338 transitions. [2021-11-02 23:19:50,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:19:50,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1338 transitions. [2021-11-02 23:19:50,772 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) [2021-11-02 23:19:50,779 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) [2021-11-02 23:19:50,780 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) [2021-11-02 23:19:50,780 INFO L186 Difference]: Start difference. First operand has 175 places, 125 transitions, 1548 flow. Second operand 24 states and 1338 transitions. [2021-11-02 23:19:50,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 166 transitions, 3137 flow [2021-11-02 23:19:50,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 166 transitions, 2873 flow, removed 102 selfloop flow, removed 15 redundant places. [2021-11-02 23:19:50,842 INFO L242 Difference]: Finished difference. Result has 190 places, 137 transitions, 1920 flow [2021-11-02 23:19:50,843 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1396, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1920, PETRI_PLACES=190, PETRI_TRANSITIONS=137} [2021-11-02 23:19:50,843 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 124 predicate places. [2021-11-02 23:19:50,844 INFO L470 AbstractCegarLoop]: Abstraction has has 190 places, 137 transitions, 1920 flow [2021-11-02 23:19:50,856 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) [2021-11-02 23:19:50,866 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:19:50,866 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] [2021-11-02 23:19:50,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:51,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-02 23:19:51,077 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:19:51,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:51,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1984486184, now seen corresponding path program 9 times [2021-11-02 23:19:51,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:51,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080174112] [2021-11-02 23:19:51,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:51,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:51,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:51,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:51,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080174112] [2021-11-02 23:19:51,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080174112] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:51,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801884723] [2021-11-02 23:19:51,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:19:51,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:51,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:51,250 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:51,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 23:19:51,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 23:19:51,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:51,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 23:19:51,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:51,920 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:51,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801884723] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:51,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:51,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-11-02 23:19:51,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898407052] [2021-11-02 23:19:51,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:19:51,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:51,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:19:51,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:19:51,928 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:19:51,930 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 137 transitions, 1920 flow. Second operand has 11 states, 11 states have (on average 54.09090909090909) internal successors, (595), 11 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:51,931 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:19:51,931 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:19:51,931 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:19:52,255 INFO L129 PetriNetUnfolder]: 88/553 cut-off events. [2021-11-02 23:19:52,256 INFO L130 PetriNetUnfolder]: For 18083/18255 co-relation queries the response was YES. [2021-11-02 23:19:52,264 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2939 conditions, 553 events. 88/553 cut-off events. For 18083/18255 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3209 event pairs, 0 based on Foata normal form. 31/527 useless extension candidates. Maximal degree in co-relation 2844. Up to 115 conditions per place. [2021-11-02 23:19:52,273 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 75 selfloop transitions, 29 changer transitions 8/156 dead transitions. [2021-11-02 23:19:52,274 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 156 transitions, 2978 flow [2021-11-02 23:19:52,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 23:19:52,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-11-02 23:19:52,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 836 transitions. [2021-11-02 23:19:52,311 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8444444444444444 [2021-11-02 23:19:52,311 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 836 transitions. [2021-11-02 23:19:52,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 836 transitions. [2021-11-02 23:19:52,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:19:52,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 836 transitions. [2021-11-02 23:19:52,315 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) [2021-11-02 23:19:52,319 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) [2021-11-02 23:19:52,319 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) [2021-11-02 23:19:52,320 INFO L186 Difference]: Start difference. First operand has 190 places, 137 transitions, 1920 flow. Second operand 15 states and 836 transitions. [2021-11-02 23:19:52,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 156 transitions, 2978 flow [2021-11-02 23:19:52,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 156 transitions, 2588 flow, removed 156 selfloop flow, removed 18 redundant places. [2021-11-02 23:19:52,385 INFO L242 Difference]: Finished difference. Result has 186 places, 139 transitions, 1762 flow [2021-11-02 23:19:52,385 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1596, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1762, PETRI_PLACES=186, PETRI_TRANSITIONS=139} [2021-11-02 23:19:52,386 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 120 predicate places. [2021-11-02 23:19:52,386 INFO L470 AbstractCegarLoop]: Abstraction has has 186 places, 139 transitions, 1762 flow [2021-11-02 23:19:52,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 54.09090909090909) internal successors, (595), 11 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:52,387 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:19:52,387 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] [2021-11-02 23:19:52,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:52,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:52,601 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:19:52,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:52,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1804080638, now seen corresponding path program 10 times [2021-11-02 23:19:52,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:52,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039919668] [2021-11-02 23:19:52,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:52,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:52,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:52,751 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:52,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:52,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039919668] [2021-11-02 23:19:52,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039919668] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:52,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470807643] [2021-11-02 23:19:52,752 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:19:52,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:52,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:52,754 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:52,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 23:19:53,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:19:53,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:53,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 23:19:53,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:53,458 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:53,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470807643] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:53,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:53,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-02 23:19:53,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400495048] [2021-11-02 23:19:53,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 23:19:53,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:53,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 23:19:53,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:19:53,462 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:19:53,464 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 139 transitions, 1762 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) [2021-11-02 23:19:53,464 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:19:53,464 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:19:53,464 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:19:53,889 INFO L129 PetriNetUnfolder]: 93/591 cut-off events. [2021-11-02 23:19:53,890 INFO L130 PetriNetUnfolder]: For 18410/18567 co-relation queries the response was YES. [2021-11-02 23:19:53,898 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3024 conditions, 591 events. 93/591 cut-off events. For 18410/18567 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 3598 event pairs, 0 based on Foata normal form. 42/573 useless extension candidates. Maximal degree in co-relation 2929. Up to 117 conditions per place. [2021-11-02 23:19:53,908 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 59 selfloop transitions, 54 changer transitions 8/165 dead transitions. [2021-11-02 23:19:53,909 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 165 transitions, 2995 flow [2021-11-02 23:19:53,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 23:19:53,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-11-02 23:19:53,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1056 transitions. [2021-11-02 23:19:53,916 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8421052631578947 [2021-11-02 23:19:53,916 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1056 transitions. [2021-11-02 23:19:53,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1056 transitions. [2021-11-02 23:19:53,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:19:53,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1056 transitions. [2021-11-02 23:19:53,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 55.578947368421055) internal successors, (1056), 19 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) [2021-11-02 23:19:53,952 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) [2021-11-02 23:19:53,952 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) [2021-11-02 23:19:53,952 INFO L186 Difference]: Start difference. First operand has 186 places, 139 transitions, 1762 flow. Second operand 19 states and 1056 transitions. [2021-11-02 23:19:53,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 165 transitions, 2995 flow [2021-11-02 23:19:54,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 165 transitions, 2779 flow, removed 83 selfloop flow, removed 12 redundant places. [2021-11-02 23:19:54,018 INFO L242 Difference]: Finished difference. Result has 197 places, 146 transitions, 2006 flow [2021-11-02 23:19:54,018 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1650, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2006, PETRI_PLACES=197, PETRI_TRANSITIONS=146} [2021-11-02 23:19:54,019 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 131 predicate places. [2021-11-02 23:19:54,019 INFO L470 AbstractCegarLoop]: Abstraction has has 197 places, 146 transitions, 2006 flow [2021-11-02 23:19:54,019 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) [2021-11-02 23:19:54,019 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:19:54,020 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] [2021-11-02 23:19:54,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:54,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:54,233 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:19:54,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:54,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1223348734, now seen corresponding path program 11 times [2021-11-02 23:19:54,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:54,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688891942] [2021-11-02 23:19:54,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:54,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:54,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:54,399 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:54,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:54,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688891942] [2021-11-02 23:19:54,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688891942] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:54,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277820007] [2021-11-02 23:19:54,401 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:19:54,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:54,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:54,402 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:54,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 23:19:54,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-02 23:19:54,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:54,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 23:19:54,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:55,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277820007] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:55,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:55,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-11-02 23:19:55,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275316568] [2021-11-02 23:19:55,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:19:55,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:55,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:19:55,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:19:55,249 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:19:55,250 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 146 transitions, 2006 flow. Second operand has 11 states, 11 states have (on average 54.09090909090909) internal successors, (595), 11 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:55,251 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:19:55,251 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:19:55,251 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:19:55,704 INFO L129 PetriNetUnfolder]: 95/609 cut-off events. [2021-11-02 23:19:55,704 INFO L130 PetriNetUnfolder]: For 19081/19239 co-relation queries the response was YES. [2021-11-02 23:19:55,714 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3174 conditions, 609 events. 95/609 cut-off events. For 19081/19239 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3755 event pairs, 0 based on Foata normal form. 49/596 useless extension candidates. Maximal degree in co-relation 3074. Up to 121 conditions per place. [2021-11-02 23:19:55,724 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 51 selfloop transitions, 65 changer transitions 8/168 dead transitions. [2021-11-02 23:19:55,724 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 168 transitions, 3191 flow [2021-11-02 23:19:55,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 23:19:55,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-02 23:19:55,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1001 transitions. [2021-11-02 23:19:55,732 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8425925925925926 [2021-11-02 23:19:55,732 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1001 transitions. [2021-11-02 23:19:55,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1001 transitions. [2021-11-02 23:19:55,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:19:55,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1001 transitions. [2021-11-02 23:19:55,736 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) [2021-11-02 23:19:55,738 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) [2021-11-02 23:19:55,739 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) [2021-11-02 23:19:55,739 INFO L186 Difference]: Start difference. First operand has 197 places, 146 transitions, 2006 flow. Second operand 18 states and 1001 transitions. [2021-11-02 23:19:55,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 168 transitions, 3191 flow [2021-11-02 23:19:55,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 168 transitions, 2960 flow, removed 72 selfloop flow, removed 14 redundant places. [2021-11-02 23:19:55,845 INFO L242 Difference]: Finished difference. Result has 202 places, 148 transitions, 2091 flow [2021-11-02 23:19:55,846 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1835, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2091, PETRI_PLACES=202, PETRI_TRANSITIONS=148} [2021-11-02 23:19:55,846 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 136 predicate places. [2021-11-02 23:19:55,847 INFO L470 AbstractCegarLoop]: Abstraction has has 202 places, 148 transitions, 2091 flow [2021-11-02 23:19:55,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 54.09090909090909) internal successors, (595), 11 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:55,847 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:19:55,848 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] [2021-11-02 23:19:55,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:56,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:56,073 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:19:56,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:56,074 INFO L85 PathProgramCache]: Analyzing trace with hash -526176844, now seen corresponding path program 12 times [2021-11-02 23:19:56,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:56,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129476309] [2021-11-02 23:19:56,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:56,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:56,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:56,210 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:56,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:56,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129476309] [2021-11-02 23:19:56,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129476309] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:56,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630980585] [2021-11-02 23:19:56,211 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:19:56,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:56,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:56,216 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:56,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-02 23:19:56,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-02 23:19:56,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:56,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 23:19:56,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:57,003 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:57,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630980585] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:57,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:57,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-02 23:19:57,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071019546] [2021-11-02 23:19:57,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 23:19:57,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:57,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 23:19:57,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:19:57,006 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:19:57,007 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 148 transitions, 2091 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) [2021-11-02 23:19:57,007 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:19:57,007 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:19:57,007 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:19:57,518 INFO L129 PetriNetUnfolder]: 101/656 cut-off events. [2021-11-02 23:19:57,561 INFO L130 PetriNetUnfolder]: For 21229/21393 co-relation queries the response was YES. [2021-11-02 23:19:57,570 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3497 conditions, 656 events. 101/656 cut-off events. For 21229/21393 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 4178 event pairs, 0 based on Foata normal form. 58/648 useless extension candidates. Maximal degree in co-relation 3396. Up to 131 conditions per place. [2021-11-02 23:19:57,582 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 40 selfloop transitions, 84 changer transitions 8/176 dead transitions. [2021-11-02 23:19:57,583 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 176 transitions, 3503 flow [2021-11-02 23:19:57,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 23:19:57,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-11-02 23:19:57,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1168 transitions. [2021-11-02 23:19:57,587 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8427128427128427 [2021-11-02 23:19:57,587 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1168 transitions. [2021-11-02 23:19:57,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1168 transitions. [2021-11-02 23:19:57,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:19:57,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1168 transitions. [2021-11-02 23:19:57,592 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) [2021-11-02 23:19:57,595 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) [2021-11-02 23:19:57,596 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) [2021-11-02 23:19:57,596 INFO L186 Difference]: Start difference. First operand has 202 places, 148 transitions, 2091 flow. Second operand 21 states and 1168 transitions. [2021-11-02 23:19:57,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 176 transitions, 3503 flow [2021-11-02 23:19:57,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 176 transitions, 3193 flow, removed 102 selfloop flow, removed 15 redundant places. [2021-11-02 23:19:57,679 INFO L242 Difference]: Finished difference. Result has 210 places, 155 transitions, 2374 flow [2021-11-02 23:19:57,680 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1925, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2374, PETRI_PLACES=210, PETRI_TRANSITIONS=155} [2021-11-02 23:19:57,680 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 144 predicate places. [2021-11-02 23:19:57,680 INFO L470 AbstractCegarLoop]: Abstraction has has 210 places, 155 transitions, 2374 flow [2021-11-02 23:19:57,681 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) [2021-11-02 23:19:57,681 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:19:57,681 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] [2021-11-02 23:19:57,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-02 23:19:57,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:57,909 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:19:57,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:57,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1352190792, now seen corresponding path program 13 times [2021-11-02 23:19:57,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:57,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438130408] [2021-11-02 23:19:57,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:57,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:57,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:58,059 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:58,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:58,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438130408] [2021-11-02 23:19:58,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438130408] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:58,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907362751] [2021-11-02 23:19:58,061 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:19:58,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:58,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:58,062 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:58,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-02 23:19:58,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:58,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 23:19:58,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:58,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907362751] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:58,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:58,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-11-02 23:19:58,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883485045] [2021-11-02 23:19:58,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:19:58,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:58,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:19:58,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:19:58,832 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:19:58,833 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 155 transitions, 2374 flow. Second operand has 11 states, 11 states have (on average 54.09090909090909) internal successors, (595), 11 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:58,833 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:19:58,834 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:19:58,834 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:19:59,320 INFO L129 PetriNetUnfolder]: 116/724 cut-off events. [2021-11-02 23:19:59,320 INFO L130 PetriNetUnfolder]: For 23552/23739 co-relation queries the response was YES. [2021-11-02 23:19:59,333 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4042 conditions, 724 events. 116/724 cut-off events. For 23552/23739 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 4721 event pairs, 0 based on Foata normal form. 60/712 useless extension candidates. Maximal degree in co-relation 3938. Up to 151 conditions per place. [2021-11-02 23:19:59,346 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 43 selfloop transitions, 92 changer transitions 8/187 dead transitions. [2021-11-02 23:19:59,346 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 187 transitions, 3909 flow [2021-11-02 23:19:59,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 23:19:59,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-11-02 23:19:59,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1117 transitions. [2021-11-02 23:19:59,349 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8462121212121212 [2021-11-02 23:19:59,350 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1117 transitions. [2021-11-02 23:19:59,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1117 transitions. [2021-11-02 23:19:59,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:19:59,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1117 transitions. [2021-11-02 23:19:59,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 55.85) internal successors, (1117), 20 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:59,356 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) [2021-11-02 23:19:59,357 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) [2021-11-02 23:19:59,358 INFO L186 Difference]: Start difference. First operand has 210 places, 155 transitions, 2374 flow. Second operand 20 states and 1117 transitions. [2021-11-02 23:19:59,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 187 transitions, 3909 flow [2021-11-02 23:19:59,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 187 transitions, 3567 flow, removed 106 selfloop flow, removed 17 redundant places. [2021-11-02 23:19:59,451 INFO L242 Difference]: Finished difference. Result has 216 places, 161 transitions, 2622 flow [2021-11-02 23:19:59,452 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2126, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2622, PETRI_PLACES=216, PETRI_TRANSITIONS=161} [2021-11-02 23:19:59,452 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 150 predicate places. [2021-11-02 23:19:59,452 INFO L470 AbstractCegarLoop]: Abstraction has has 216 places, 161 transitions, 2622 flow [2021-11-02 23:19:59,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 54.09090909090909) internal successors, (595), 11 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:59,453 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:19:59,453 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] [2021-11-02 23:19:59,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:59,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:59,667 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:19:59,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:59,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1417546304, now seen corresponding path program 14 times [2021-11-02 23:19:59,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:59,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450575318] [2021-11-02 23:19:59,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:59,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:59,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:59,846 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:59,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:59,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450575318] [2021-11-02 23:19:59,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450575318] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:59,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988730986] [2021-11-02 23:19:59,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:19:59,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:59,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:59,849 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:59,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-02 23:20:00,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:20:00,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:00,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 23:20:00,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:00,622 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:00,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988730986] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:00,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:20:00,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-11-02 23:20:00,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302393331] [2021-11-02 23:20:00,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 23:20:00,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:00,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 23:20:00,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:20:00,626 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:20:00,627 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 161 transitions, 2622 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) [2021-11-02 23:20:00,627 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:20:00,627 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:20:00,628 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:20:01,295 INFO L129 PetriNetUnfolder]: 117/740 cut-off events. [2021-11-02 23:20:01,296 INFO L130 PetriNetUnfolder]: For 28928/29136 co-relation queries the response was YES. [2021-11-02 23:20:01,308 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4341 conditions, 740 events. 117/740 cut-off events. For 28928/29136 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4852 event pairs, 0 based on Foata normal form. 70/737 useless extension candidates. Maximal degree in co-relation 4233. Up to 151 conditions per place. [2021-11-02 23:20:01,320 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 35 selfloop transitions, 104 changer transitions 17/200 dead transitions. [2021-11-02 23:20:01,321 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 200 transitions, 4733 flow [2021-11-02 23:20:01,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 23:20:01,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-11-02 23:20:01,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1338 transitions. [2021-11-02 23:20:01,324 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8446969696969697 [2021-11-02 23:20:01,324 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1338 transitions. [2021-11-02 23:20:01,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1338 transitions. [2021-11-02 23:20:01,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:20:01,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1338 transitions. [2021-11-02 23:20:01,329 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) [2021-11-02 23:20:01,332 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) [2021-11-02 23:20:01,333 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) [2021-11-02 23:20:01,334 INFO L186 Difference]: Start difference. First operand has 216 places, 161 transitions, 2622 flow. Second operand 24 states and 1338 transitions. [2021-11-02 23:20:01,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 200 transitions, 4733 flow [2021-11-02 23:20:01,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 200 transitions, 4297 flow, removed 154 selfloop flow, removed 15 redundant places. [2021-11-02 23:20:01,440 INFO L242 Difference]: Finished difference. Result has 231 places, 169 transitions, 2990 flow [2021-11-02 23:20:01,440 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2364, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2990, PETRI_PLACES=231, PETRI_TRANSITIONS=169} [2021-11-02 23:20:01,441 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 165 predicate places. [2021-11-02 23:20:01,441 INFO L470 AbstractCegarLoop]: Abstraction has has 231 places, 169 transitions, 2990 flow [2021-11-02 23:20:01,441 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) [2021-11-02 23:20:01,442 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:20:01,442 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] [2021-11-02 23:20:01,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-02 23:20:01,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:01,657 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:20:01,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:01,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1303582700, now seen corresponding path program 15 times [2021-11-02 23:20:01,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:01,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536170499] [2021-11-02 23:20:01,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:01,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:01,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:01,779 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 23:20:01,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:01,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536170499] [2021-11-02 23:20:01,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536170499] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:01,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931055598] [2021-11-02 23:20:01,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:20:01,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:01,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:01,785 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:01,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-02 23:20:02,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-02 23:20:02,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:02,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 23:20:02,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:02,829 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 23:20:02,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931055598] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:02,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:20:02,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-11-02 23:20:02,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347738114] [2021-11-02 23:20:02,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 23:20:02,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:02,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 23:20:02,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:20:02,833 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:20:02,834 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 169 transitions, 2990 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) [2021-11-02 23:20:02,834 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:20:02,834 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:20:02,835 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:20:03,484 INFO L129 PetriNetUnfolder]: 130/827 cut-off events. [2021-11-02 23:20:03,484 INFO L130 PetriNetUnfolder]: For 40271/40479 co-relation queries the response was YES. [2021-11-02 23:20:03,498 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5200 conditions, 827 events. 130/827 cut-off events. For 40271/40479 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 5774 event pairs, 0 based on Foata normal form. 73/818 useless extension candidates. Maximal degree in co-relation 5085. Up to 169 conditions per place. [2021-11-02 23:20:03,508 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 68 selfloop transitions, 91 changer transitions 11/214 dead transitions. [2021-11-02 23:20:03,508 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 214 transitions, 5378 flow [2021-11-02 23:20:03,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 23:20:03,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-11-02 23:20:03,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1337 transitions. [2021-11-02 23:20:03,511 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8440656565656566 [2021-11-02 23:20:03,512 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1337 transitions. [2021-11-02 23:20:03,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1337 transitions. [2021-11-02 23:20:03,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:20:03,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1337 transitions. [2021-11-02 23:20:03,516 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) [2021-11-02 23:20:03,523 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) [2021-11-02 23:20:03,524 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) [2021-11-02 23:20:03,524 INFO L186 Difference]: Start difference. First operand has 231 places, 169 transitions, 2990 flow. Second operand 24 states and 1337 transitions. [2021-11-02 23:20:03,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 214 transitions, 5378 flow [2021-11-02 23:20:03,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 214 transitions, 4786 flow, removed 203 selfloop flow, removed 19 redundant places. [2021-11-02 23:20:03,657 INFO L242 Difference]: Finished difference. Result has 239 places, 189 transitions, 3529 flow [2021-11-02 23:20:03,657 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2534, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3529, PETRI_PLACES=239, PETRI_TRANSITIONS=189} [2021-11-02 23:20:03,658 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 173 predicate places. [2021-11-02 23:20:03,658 INFO L470 AbstractCegarLoop]: Abstraction has has 239 places, 189 transitions, 3529 flow [2021-11-02 23:20:03,659 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) [2021-11-02 23:20:03,659 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:20:03,659 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] [2021-11-02 23:20:03,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-02 23:20:03,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-02 23:20:03,873 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:20:03,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:03,873 INFO L85 PathProgramCache]: Analyzing trace with hash 919241940, now seen corresponding path program 16 times [2021-11-02 23:20:03,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:03,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663523572] [2021-11-02 23:20:03,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:03,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:03,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:04,058 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:20:04,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:04,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663523572] [2021-11-02 23:20:04,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663523572] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:04,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623828532] [2021-11-02 23:20:04,059 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:20:04,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:04,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:04,063 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:04,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-02 23:20:04,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:20:04,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:04,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 23:20:04,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:04,989 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:20:04,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623828532] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:04,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:20:04,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-11-02 23:20:04,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338637081] [2021-11-02 23:20:04,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 23:20:04,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:04,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 23:20:04,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:20:04,993 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:20:04,994 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 189 transitions, 3529 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) [2021-11-02 23:20:04,995 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:20:04,995 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:20:04,995 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:20:05,623 INFO L129 PetriNetUnfolder]: 137/874 cut-off events. [2021-11-02 23:20:05,623 INFO L130 PetriNetUnfolder]: For 50461/50667 co-relation queries the response was YES. [2021-11-02 23:20:05,638 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5759 conditions, 874 events. 137/874 cut-off events. For 50461/50667 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 6041 event pairs, 0 based on Foata normal form. 79/866 useless extension candidates. Maximal degree in co-relation 5640. Up to 175 conditions per place. [2021-11-02 23:20:05,659 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 43 selfloop transitions, 128 changer transitions 11/226 dead transitions. [2021-11-02 23:20:05,659 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 226 transitions, 6115 flow [2021-11-02 23:20:05,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 23:20:05,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-11-02 23:20:05,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1337 transitions. [2021-11-02 23:20:05,664 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8440656565656566 [2021-11-02 23:20:05,664 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1337 transitions. [2021-11-02 23:20:05,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1337 transitions. [2021-11-02 23:20:05,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:20:05,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1337 transitions. [2021-11-02 23:20:05,669 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) [2021-11-02 23:20:05,679 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) [2021-11-02 23:20:05,680 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) [2021-11-02 23:20:05,680 INFO L186 Difference]: Start difference. First operand has 239 places, 189 transitions, 3529 flow. Second operand 24 states and 1337 transitions. [2021-11-02 23:20:05,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 226 transitions, 6115 flow [2021-11-02 23:20:05,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 226 transitions, 5289 flow, removed 371 selfloop flow, removed 18 redundant places. [2021-11-02 23:20:05,861 INFO L242 Difference]: Finished difference. Result has 249 places, 200 transitions, 3891 flow [2021-11-02 23:20:05,863 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3041, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3891, PETRI_PLACES=249, PETRI_TRANSITIONS=200} [2021-11-02 23:20:05,863 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 183 predicate places. [2021-11-02 23:20:05,864 INFO L470 AbstractCegarLoop]: Abstraction has has 249 places, 200 transitions, 3891 flow [2021-11-02 23:20:05,864 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) [2021-11-02 23:20:05,865 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:20:05,865 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] [2021-11-02 23:20:05,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-02 23:20:06,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:06,093 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:20:06,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:06,093 INFO L85 PathProgramCache]: Analyzing trace with hash 910431551, now seen corresponding path program 17 times [2021-11-02 23:20:06,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:06,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877632706] [2021-11-02 23:20:06,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:06,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:06,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:06,262 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:06,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:06,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877632706] [2021-11-02 23:20:06,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877632706] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:06,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691792377] [2021-11-02 23:20:06,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:20:06,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:06,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:06,264 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:06,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-02 23:20:06,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-02 23:20:06,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:06,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 23:20:06,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:07,206 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:07,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691792377] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:07,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:20:07,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-11-02 23:20:07,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730837846] [2021-11-02 23:20:07,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 23:20:07,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:07,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 23:20:07,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:20:07,209 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:20:07,211 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 200 transitions, 3891 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) [2021-11-02 23:20:07,211 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:20:07,211 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:20:07,212 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:20:08,051 INFO L129 PetriNetUnfolder]: 163/1040 cut-off events. [2021-11-02 23:20:08,055 INFO L130 PetriNetUnfolder]: For 67194/67467 co-relation queries the response was YES. [2021-11-02 23:20:08,071 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7135 conditions, 1040 events. 163/1040 cut-off events. For 67194/67467 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 7514 event pairs, 0 based on Foata normal form. 83/1018 useless extension candidates. Maximal degree in co-relation 7013. Up to 203 conditions per place. [2021-11-02 23:20:08,087 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 73 selfloop transitions, 128 changer transitions 14/259 dead transitions. [2021-11-02 23:20:08,087 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 259 transitions, 7522 flow [2021-11-02 23:20:08,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 23:20:08,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-11-02 23:20:08,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1616 transitions. [2021-11-02 23:20:08,091 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8443051201671892 [2021-11-02 23:20:08,091 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1616 transitions. [2021-11-02 23:20:08,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1616 transitions. [2021-11-02 23:20:08,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:20:08,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1616 transitions. [2021-11-02 23:20:08,097 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) [2021-11-02 23:20:08,101 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) [2021-11-02 23:20:08,102 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) [2021-11-02 23:20:08,102 INFO L186 Difference]: Start difference. First operand has 249 places, 200 transitions, 3891 flow. Second operand 29 states and 1616 transitions. [2021-11-02 23:20:08,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 259 transitions, 7522 flow [2021-11-02 23:20:08,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 259 transitions, 6846 flow, removed 251 selfloop flow, removed 17 redundant places. [2021-11-02 23:20:08,312 INFO L242 Difference]: Finished difference. Result has 268 places, 227 transitions, 4950 flow [2021-11-02 23:20:08,313 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3374, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=4950, PETRI_PLACES=268, PETRI_TRANSITIONS=227} [2021-11-02 23:20:08,313 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 202 predicate places. [2021-11-02 23:20:08,314 INFO L470 AbstractCegarLoop]: Abstraction has has 268 places, 227 transitions, 4950 flow [2021-11-02 23:20:08,314 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) [2021-11-02 23:20:08,314 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:20:08,315 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] [2021-11-02 23:20:08,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-11-02 23:20:08,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:08,529 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:20:08,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:08,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1095888709, now seen corresponding path program 18 times [2021-11-02 23:20:08,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:08,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571211692] [2021-11-02 23:20:08,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:08,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:08,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:08,738 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:08,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:08,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571211692] [2021-11-02 23:20:08,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571211692] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:08,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015421076] [2021-11-02 23:20:08,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:20:08,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:08,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:08,741 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:08,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-02 23:20:09,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-02 23:20:09,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:09,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 23:20:09,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:09,953 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:09,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015421076] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:09,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:20:09,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-11-02 23:20:09,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854673415] [2021-11-02 23:20:09,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 23:20:09,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:09,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 23:20:09,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:20:09,960 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:20:09,961 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 227 transitions, 4950 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) [2021-11-02 23:20:09,961 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:20:09,962 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:20:09,962 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:20:10,815 INFO L129 PetriNetUnfolder]: 165/1072 cut-off events. [2021-11-02 23:20:10,815 INFO L130 PetriNetUnfolder]: For 87169/87483 co-relation queries the response was YES. [2021-11-02 23:20:10,832 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7745 conditions, 1072 events. 165/1072 cut-off events. For 87169/87483 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 7741 event pairs, 0 based on Foata normal form. 92/1055 useless extension candidates. Maximal degree in co-relation 7614. Up to 203 conditions per place. [2021-11-02 23:20:10,848 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 57 selfloop transitions, 152 changer transitions 8/261 dead transitions. [2021-11-02 23:20:10,849 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 261 transitions, 7844 flow [2021-11-02 23:20:10,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 23:20:10,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-11-02 23:20:10,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1447 transitions. [2021-11-02 23:20:10,852 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8432400932400932 [2021-11-02 23:20:10,853 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1447 transitions. [2021-11-02 23:20:10,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1447 transitions. [2021-11-02 23:20:10,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:20:10,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1447 transitions. [2021-11-02 23:20:10,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 55.65384615384615) internal successors, (1447), 26 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:10,861 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) [2021-11-02 23:20:10,862 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) [2021-11-02 23:20:10,862 INFO L186 Difference]: Start difference. First operand has 268 places, 227 transitions, 4950 flow. Second operand 26 states and 1447 transitions. [2021-11-02 23:20:10,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 261 transitions, 7844 flow [2021-11-02 23:20:11,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 261 transitions, 6735 flow, removed 472 selfloop flow, removed 24 redundant places. [2021-11-02 23:20:11,106 INFO L242 Difference]: Finished difference. Result has 271 places, 233 transitions, 4899 flow [2021-11-02 23:20:11,107 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=4177, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4899, PETRI_PLACES=271, PETRI_TRANSITIONS=233} [2021-11-02 23:20:11,108 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 205 predicate places. [2021-11-02 23:20:11,108 INFO L470 AbstractCegarLoop]: Abstraction has has 271 places, 233 transitions, 4899 flow [2021-11-02 23:20:11,108 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) [2021-11-02 23:20:11,109 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:20:11,109 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] [2021-11-02 23:20:11,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-02 23:20:11,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:11,324 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:20:11,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:11,324 INFO L85 PathProgramCache]: Analyzing trace with hash 376688194, now seen corresponding path program 19 times [2021-11-02 23:20:11,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:11,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071193238] [2021-11-02 23:20:11,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:11,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:11,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:11,562 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:11,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:11,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071193238] [2021-11-02 23:20:11,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071193238] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:11,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551559625] [2021-11-02 23:20:11,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:20:11,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:11,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:11,565 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:11,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-02 23:20:12,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:12,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 23:20:12,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:12,992 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:12,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551559625] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:12,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:20:12,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-02 23:20:12,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112168377] [2021-11-02 23:20:12,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 23:20:12,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:12,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 23:20:12,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:20:12,995 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:20:12,996 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 233 transitions, 4899 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) [2021-11-02 23:20:12,997 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:20:12,997 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:20:12,997 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:20:13,763 INFO L129 PetriNetUnfolder]: 177/1180 cut-off events. [2021-11-02 23:20:13,763 INFO L130 PetriNetUnfolder]: For 87101/87415 co-relation queries the response was YES. [2021-11-02 23:20:13,781 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8054 conditions, 1180 events. 177/1180 cut-off events. For 87101/87415 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 8670 event pairs, 0 based on Foata normal form. 40/1095 useless extension candidates. Maximal degree in co-relation 7924. Up to 241 conditions per place. [2021-11-02 23:20:13,801 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 174 selfloop transitions, 45 changer transitions 8/271 dead transitions. [2021-11-02 23:20:13,801 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 271 transitions, 7497 flow [2021-11-02 23:20:13,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 23:20:13,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-11-02 23:20:13,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1056 transitions. [2021-11-02 23:20:13,805 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8421052631578947 [2021-11-02 23:20:13,805 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1056 transitions. [2021-11-02 23:20:13,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1056 transitions. [2021-11-02 23:20:13,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:20:13,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1056 transitions. [2021-11-02 23:20:13,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 55.578947368421055) internal successors, (1056), 19 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) [2021-11-02 23:20:13,813 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) [2021-11-02 23:20:13,813 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) [2021-11-02 23:20:13,814 INFO L186 Difference]: Start difference. First operand has 271 places, 233 transitions, 4899 flow. Second operand 19 states and 1056 transitions. [2021-11-02 23:20:13,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 271 transitions, 7497 flow [2021-11-02 23:20:14,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 271 transitions, 7004 flow, removed 129 selfloop flow, removed 20 redundant places. [2021-11-02 23:20:14,101 INFO L242 Difference]: Finished difference. Result has 273 places, 245 transitions, 5143 flow [2021-11-02 23:20:14,102 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=4508, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5143, PETRI_PLACES=273, PETRI_TRANSITIONS=245} [2021-11-02 23:20:14,102 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 207 predicate places. [2021-11-02 23:20:14,103 INFO L470 AbstractCegarLoop]: Abstraction has has 273 places, 245 transitions, 5143 flow [2021-11-02 23:20:14,104 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) [2021-11-02 23:20:14,104 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:20:14,104 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] [2021-11-02 23:20:14,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-02 23:20:14,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-02 23:20:14,321 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:20:14,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:14,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1852018496, now seen corresponding path program 20 times [2021-11-02 23:20:14,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:14,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145227118] [2021-11-02 23:20:14,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:14,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:14,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:14,550 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:14,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:14,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145227118] [2021-11-02 23:20:14,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145227118] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:14,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052133234] [2021-11-02 23:20:14,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:20:14,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:14,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:14,557 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:14,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-02 23:20:15,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:20:15,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:15,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 23:20:15,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:15,752 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:15,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052133234] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:15,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:20:15,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-02 23:20:15,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50775470] [2021-11-02 23:20:15,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 23:20:15,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:15,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 23:20:15,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:20:15,755 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:20:15,756 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 245 transitions, 5143 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) [2021-11-02 23:20:15,757 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:20:15,757 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:20:15,757 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:20:16,508 INFO L129 PetriNetUnfolder]: 189/1295 cut-off events. [2021-11-02 23:20:16,508 INFO L130 PetriNetUnfolder]: For 97263/97560 co-relation queries the response was YES. [2021-11-02 23:20:16,520 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8759 conditions, 1295 events. 189/1295 cut-off events. For 97263/97560 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 9783 event pairs, 0 based on Foata normal form. 59/1216 useless extension candidates. Maximal degree in co-relation 8624. Up to 223 conditions per place. [2021-11-02 23:20:16,541 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 127 selfloop transitions, 105 changer transitions 8/284 dead transitions. [2021-11-02 23:20:16,541 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 284 transitions, 7924 flow [2021-11-02 23:20:16,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 23:20:16,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-11-02 23:20:16,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1221 transitions. [2021-11-02 23:20:16,546 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8409090909090909 [2021-11-02 23:20:16,546 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1221 transitions. [2021-11-02 23:20:16,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1221 transitions. [2021-11-02 23:20:16,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:20:16,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1221 transitions. [2021-11-02 23:20:16,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 55.5) internal successors, (1221), 22 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:16,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 66.0) internal successors, (1518), 23 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:16,553 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 66.0) internal successors, (1518), 23 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:16,553 INFO L186 Difference]: Start difference. First operand has 273 places, 245 transitions, 5143 flow. Second operand 22 states and 1221 transitions. [2021-11-02 23:20:16,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 284 transitions, 7924 flow [2021-11-02 23:20:16,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 284 transitions, 7699 flow, removed 80 selfloop flow, removed 14 redundant places. [2021-11-02 23:20:16,862 INFO L242 Difference]: Finished difference. Result has 284 places, 257 transitions, 5795 flow [2021-11-02 23:20:16,862 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=4990, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5795, PETRI_PLACES=284, PETRI_TRANSITIONS=257} [2021-11-02 23:20:16,863 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 218 predicate places. [2021-11-02 23:20:16,863 INFO L470 AbstractCegarLoop]: Abstraction has has 284 places, 257 transitions, 5795 flow [2021-11-02 23:20:16,864 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) [2021-11-02 23:20:16,864 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:20:16,864 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] [2021-11-02 23:20:16,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-02 23:20:17,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-02 23:20:17,093 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:20:17,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:17,094 INFO L85 PathProgramCache]: Analyzing trace with hash 730835202, now seen corresponding path program 21 times [2021-11-02 23:20:17,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:17,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653218716] [2021-11-02 23:20:17,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:17,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:17,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:17,268 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:17,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:17,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653218716] [2021-11-02 23:20:17,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653218716] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:17,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319654477] [2021-11-02 23:20:17,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:20:17,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:17,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:17,277 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:17,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-02 23:20:18,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-02 23:20:18,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:18,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 23:20:18,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:18,586 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:18,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319654477] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:18,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:20:18,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-02 23:20:18,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703748043] [2021-11-02 23:20:18,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 23:20:18,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:18,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 23:20:18,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:20:18,589 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:20:18,590 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 257 transitions, 5795 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) [2021-11-02 23:20:18,591 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:20:18,591 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:20:18,591 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:20:19,477 INFO L129 PetriNetUnfolder]: 201/1354 cut-off events. [2021-11-02 23:20:19,477 INFO L130 PetriNetUnfolder]: For 108884/109263 co-relation queries the response was YES. [2021-11-02 23:20:19,492 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9598 conditions, 1354 events. 201/1354 cut-off events. For 108884/109263 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 10397 event pairs, 0 based on Foata normal form. 103/1316 useless extension candidates. Maximal degree in co-relation 9459. Up to 241 conditions per place. [2021-11-02 23:20:19,515 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 69 selfloop transitions, 181 changer transitions 8/302 dead transitions. [2021-11-02 23:20:19,515 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 302 transitions, 9067 flow [2021-11-02 23:20:19,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 23:20:19,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-11-02 23:20:19,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1445 transitions. [2021-11-02 23:20:19,520 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8420745920745921 [2021-11-02 23:20:19,520 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1445 transitions. [2021-11-02 23:20:19,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1445 transitions. [2021-11-02 23:20:19,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:20:19,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1445 transitions. [2021-11-02 23:20:19,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 55.57692307692308) internal successors, (1445), 26 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:19,528 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) [2021-11-02 23:20:19,529 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) [2021-11-02 23:20:19,529 INFO L186 Difference]: Start difference. First operand has 284 places, 257 transitions, 5795 flow. Second operand 26 states and 1445 transitions. [2021-11-02 23:20:19,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 302 transitions, 9067 flow [2021-11-02 23:20:19,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 302 transitions, 8660 flow, removed 125 selfloop flow, removed 17 redundant places. [2021-11-02 23:20:19,806 INFO L242 Difference]: Finished difference. Result has 296 places, 272 transitions, 6592 flow [2021-11-02 23:20:19,807 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=5528, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=6592, PETRI_PLACES=296, PETRI_TRANSITIONS=272} [2021-11-02 23:20:19,807 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 230 predicate places. [2021-11-02 23:20:19,807 INFO L470 AbstractCegarLoop]: Abstraction has has 296 places, 272 transitions, 6592 flow [2021-11-02 23:20:19,808 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) [2021-11-02 23:20:19,808 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:20:19,808 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] [2021-11-02 23:20:19,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-02 23:20:20,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:20,009 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:20:20,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:20,010 INFO L85 PathProgramCache]: Analyzing trace with hash 240526272, now seen corresponding path program 22 times [2021-11-02 23:20:20,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:20,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417743927] [2021-11-02 23:20:20,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:20,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:20,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:20,202 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:20,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:20,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417743927] [2021-11-02 23:20:20,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417743927] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:20,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916755914] [2021-11-02 23:20:20,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:20:20,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:20,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:20,209 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:20,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-02 23:20:20,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:20:20,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:20,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 23:20:20,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:21,352 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:21,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916755914] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:21,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:20:21,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-02 23:20:21,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095826029] [2021-11-02 23:20:21,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 23:20:21,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:21,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 23:20:21,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:20:21,357 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:20:21,358 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 272 transitions, 6592 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) [2021-11-02 23:20:21,358 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:20:21,359 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:20:21,359 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:20:22,453 INFO L129 PetriNetUnfolder]: 207/1385 cut-off events. [2021-11-02 23:20:22,454 INFO L130 PetriNetUnfolder]: For 117268/117688 co-relation queries the response was YES. [2021-11-02 23:20:22,473 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10109 conditions, 1385 events. 207/1385 cut-off events. For 117268/117688 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 10693 event pairs, 0 based on Foata normal form. 126/1369 useless extension candidates. Maximal degree in co-relation 9966. Up to 249 conditions per place. [2021-11-02 23:20:22,491 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 60 selfloop transitions, 198 changer transitions 8/310 dead transitions. [2021-11-02 23:20:22,492 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 310 transitions, 9872 flow [2021-11-02 23:20:22,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-02 23:20:22,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-11-02 23:20:22,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1669 transitions. [2021-11-02 23:20:22,496 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.842929292929293 [2021-11-02 23:20:22,496 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1669 transitions. [2021-11-02 23:20:22,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1669 transitions. [2021-11-02 23:20:22,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:20:22,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1669 transitions. [2021-11-02 23:20:22,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 55.63333333333333) internal successors, (1669), 30 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:22,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:22,505 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:22,506 INFO L186 Difference]: Start difference. First operand has 296 places, 272 transitions, 6592 flow. Second operand 30 states and 1669 transitions. [2021-11-02 23:20:22,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 310 transitions, 9872 flow [2021-11-02 23:20:22,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 310 transitions, 9239 flow, removed 171 selfloop flow, removed 20 redundant places. [2021-11-02 23:20:22,797 INFO L242 Difference]: Finished difference. Result has 309 places, 278 transitions, 6898 flow [2021-11-02 23:20:22,797 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=6061, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=6898, PETRI_PLACES=309, PETRI_TRANSITIONS=278} [2021-11-02 23:20:22,798 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 243 predicate places. [2021-11-02 23:20:22,798 INFO L470 AbstractCegarLoop]: Abstraction has has 309 places, 278 transitions, 6898 flow [2021-11-02 23:20:22,798 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) [2021-11-02 23:20:22,798 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:20:22,799 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] [2021-11-02 23:20:22,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-02 23:20:23,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:23,009 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:20:23,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:23,010 INFO L85 PathProgramCache]: Analyzing trace with hash 2103475369, now seen corresponding path program 23 times [2021-11-02 23:20:23,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:23,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543091672] [2021-11-02 23:20:23,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:23,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:23,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:23,254 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:23,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:23,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543091672] [2021-11-02 23:20:23,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543091672] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:23,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939557346] [2021-11-02 23:20:23,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:20:23,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:23,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:23,257 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:23,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-02 23:20:24,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-02 23:20:24,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:24,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 23:20:24,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:24,684 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:24,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939557346] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:24,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:20:24,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-02 23:20:24,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718624840] [2021-11-02 23:20:24,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 23:20:24,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:24,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 23:20:24,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:20:24,689 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:20:24,690 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 278 transitions, 6898 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) [2021-11-02 23:20:24,690 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:20:24,690 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:20:24,691 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:20:25,397 INFO L129 PetriNetUnfolder]: 211/1435 cut-off events. [2021-11-02 23:20:25,397 INFO L130 PetriNetUnfolder]: For 124711/125095 co-relation queries the response was YES. [2021-11-02 23:20:25,413 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10560 conditions, 1435 events. 211/1435 cut-off events. For 124711/125095 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 11093 event pairs, 0 based on Foata normal form. 55/1337 useless extension candidates. Maximal degree in co-relation 10413. Up to 342 conditions per place. [2021-11-02 23:20:25,428 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 228 selfloop transitions, 25 changer transitions 8/305 dead transitions. [2021-11-02 23:20:25,428 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 305 transitions, 9432 flow [2021-11-02 23:20:25,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 23:20:25,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-11-02 23:20:25,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1055 transitions. [2021-11-02 23:20:25,431 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8413078149920256 [2021-11-02 23:20:25,431 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1055 transitions. [2021-11-02 23:20:25,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1055 transitions. [2021-11-02 23:20:25,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:20:25,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1055 transitions. [2021-11-02 23:20:25,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 55.526315789473685) internal successors, (1055), 19 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:25,438 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) [2021-11-02 23:20:25,438 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) [2021-11-02 23:20:25,439 INFO L186 Difference]: Start difference. First operand has 309 places, 278 transitions, 6898 flow. Second operand 19 states and 1055 transitions. [2021-11-02 23:20:25,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 305 transitions, 9432 flow [2021-11-02 23:20:25,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 305 transitions, 8803 flow, removed 137 selfloop flow, removed 25 redundant places. [2021-11-02 23:20:25,782 INFO L242 Difference]: Finished difference. Result has 306 places, 282 transitions, 6685 flow [2021-11-02 23:20:25,782 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=6337, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6685, PETRI_PLACES=306, PETRI_TRANSITIONS=282} [2021-11-02 23:20:25,782 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 240 predicate places. [2021-11-02 23:20:25,783 INFO L470 AbstractCegarLoop]: Abstraction has has 306 places, 282 transitions, 6685 flow [2021-11-02 23:20:25,783 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) [2021-11-02 23:20:25,783 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:20:25,783 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] [2021-11-02 23:20:25,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-11-02 23:20:25,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:25,985 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:20:25,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:25,985 INFO L85 PathProgramCache]: Analyzing trace with hash -842379433, now seen corresponding path program 24 times [2021-11-02 23:20:25,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:25,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102663912] [2021-11-02 23:20:25,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:25,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:26,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:26,307 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:26,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:26,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102663912] [2021-11-02 23:20:26,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102663912] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:26,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121081285] [2021-11-02 23:20:26,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:20:26,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:26,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:26,310 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:26,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-02 23:20:27,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-02 23:20:27,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:27,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 23:20:27,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:27,815 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:27,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121081285] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:27,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:20:27,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-11-02 23:20:27,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284640749] [2021-11-02 23:20:27,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:20:27,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:27,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:20:27,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:20:27,819 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:20:27,819 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 282 transitions, 6685 flow. Second operand has 18 states, 18 states have (on average 54.166666666666664) internal successors, (975), 18 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:27,820 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:20:27,820 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:20:27,820 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:20:28,571 INFO L129 PetriNetUnfolder]: 221/1532 cut-off events. [2021-11-02 23:20:28,571 INFO L130 PetriNetUnfolder]: For 134274/134632 co-relation queries the response was YES. [2021-11-02 23:20:28,592 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11111 conditions, 1532 events. 221/1532 cut-off events. For 134274/134632 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 12037 event pairs, 0 based on Foata normal form. 58/1426 useless extension candidates. Maximal degree in co-relation 10961. Up to 326 conditions per place. [2021-11-02 23:20:28,608 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 219 selfloop transitions, 45 changer transitions 8/316 dead transitions. [2021-11-02 23:20:28,608 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 316 transitions, 9589 flow [2021-11-02 23:20:28,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 23:20:28,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-11-02 23:20:28,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1222 transitions. [2021-11-02 23:20:28,611 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8415977961432507 [2021-11-02 23:20:28,611 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1222 transitions. [2021-11-02 23:20:28,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1222 transitions. [2021-11-02 23:20:28,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:20:28,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1222 transitions. [2021-11-02 23:20:28,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 55.54545454545455) internal successors, (1222), 22 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:28,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 66.0) internal successors, (1518), 23 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:28,619 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 66.0) internal successors, (1518), 23 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:28,619 INFO L186 Difference]: Start difference. First operand has 306 places, 282 transitions, 6685 flow. Second operand 22 states and 1222 transitions. [2021-11-02 23:20:28,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 316 transitions, 9589 flow [2021-11-02 23:20:29,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 316 transitions, 9361 flow, removed 99 selfloop flow, removed 12 redundant places. [2021-11-02 23:20:29,014 INFO L242 Difference]: Finished difference. Result has 321 places, 292 transitions, 7228 flow [2021-11-02 23:20:29,015 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=6553, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7228, PETRI_PLACES=321, PETRI_TRANSITIONS=292} [2021-11-02 23:20:29,015 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 255 predicate places. [2021-11-02 23:20:29,015 INFO L470 AbstractCegarLoop]: Abstraction has has 321 places, 292 transitions, 7228 flow [2021-11-02 23:20:29,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.166666666666664) internal successors, (975), 18 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:29,016 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:20:29,016 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] [2021-11-02 23:20:29,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-02 23:20:29,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-02 23:20:29,217 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:20:29,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:29,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1538380707, now seen corresponding path program 25 times [2021-11-02 23:20:29,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:29,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636974586] [2021-11-02 23:20:29,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:29,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:29,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:29,433 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:29,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:29,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636974586] [2021-11-02 23:20:29,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636974586] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:29,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091882775] [2021-11-02 23:20:29,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:20:29,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:29,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:29,439 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:29,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-02 23:20:30,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:30,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 23:20:30,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:30,771 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:30,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091882775] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:30,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:20:30,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-02 23:20:30,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631561286] [2021-11-02 23:20:30,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 23:20:30,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:30,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 23:20:30,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:20:30,774 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:20:30,774 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 292 transitions, 7228 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) [2021-11-02 23:20:30,774 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:20:30,774 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:20:30,775 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:20:31,685 INFO L129 PetriNetUnfolder]: 225/1568 cut-off events. [2021-11-02 23:20:31,685 INFO L130 PetriNetUnfolder]: For 138692/139050 co-relation queries the response was YES. [2021-11-02 23:20:31,702 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11470 conditions, 1568 events. 225/1568 cut-off events. For 138692/139050 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 12311 event pairs, 0 based on Foata normal form. 61/1461 useless extension candidates. Maximal degree in co-relation 11314. Up to 302 conditions per place. [2021-11-02 23:20:31,715 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 207 selfloop transitions, 62 changer transitions 8/321 dead transitions. [2021-11-02 23:20:31,715 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 321 transitions, 9988 flow [2021-11-02 23:20:31,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 23:20:31,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-11-02 23:20:31,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1278 transitions. [2021-11-02 23:20:31,717 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.841897233201581 [2021-11-02 23:20:31,718 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1278 transitions. [2021-11-02 23:20:31,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1278 transitions. [2021-11-02 23:20:31,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:20:31,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1278 transitions. [2021-11-02 23:20:31,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 55.56521739130435) internal successors, (1278), 23 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:31,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 66.0) internal successors, (1584), 24 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:31,724 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 66.0) internal successors, (1584), 24 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:31,725 INFO L186 Difference]: Start difference. First operand has 321 places, 292 transitions, 7228 flow. Second operand 23 states and 1278 transitions. [2021-11-02 23:20:31,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 321 transitions, 9988 flow [2021-11-02 23:20:32,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 321 transitions, 9740 flow, removed 99 selfloop flow, removed 15 redundant places. [2021-11-02 23:20:32,093 INFO L242 Difference]: Finished difference. Result has 332 places, 296 transitions, 7530 flow [2021-11-02 23:20:32,094 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=7080, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7530, PETRI_PLACES=332, PETRI_TRANSITIONS=296} [2021-11-02 23:20:32,095 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 266 predicate places. [2021-11-02 23:20:32,095 INFO L470 AbstractCegarLoop]: Abstraction has has 332 places, 296 transitions, 7530 flow [2021-11-02 23:20:32,095 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) [2021-11-02 23:20:32,096 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:20:32,096 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] [2021-11-02 23:20:32,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-02 23:20:32,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:32,296 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:20:32,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:32,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1926233347, now seen corresponding path program 26 times [2021-11-02 23:20:32,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:32,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730187433] [2021-11-02 23:20:32,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:32,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:32,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:32,483 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:32,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:32,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730187433] [2021-11-02 23:20:32,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730187433] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:32,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181331618] [2021-11-02 23:20:32,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:20:32,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:32,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:32,486 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:32,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-02 23:20:33,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:20:33,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:33,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 23:20:33,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:33,820 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:33,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181331618] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:33,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:20:33,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-02 23:20:33,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347782635] [2021-11-02 23:20:33,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 23:20:33,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:33,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 23:20:33,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:20:33,829 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:20:33,830 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 296 transitions, 7530 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) [2021-11-02 23:20:33,830 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:20:33,830 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:20:33,831 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:20:34,744 INFO L129 PetriNetUnfolder]: 235/1658 cut-off events. [2021-11-02 23:20:34,744 INFO L130 PetriNetUnfolder]: For 145960/146318 co-relation queries the response was YES. [2021-11-02 23:20:34,769 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12163 conditions, 1658 events. 235/1658 cut-off events. For 145960/146318 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 13288 event pairs, 0 based on Foata normal form. 72/1552 useless extension candidates. Maximal degree in co-relation 12003. Up to 293 conditions per place. [2021-11-02 23:20:34,786 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 173 selfloop transitions, 111 changer transitions 8/336 dead transitions. [2021-11-02 23:20:34,786 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 336 transitions, 10731 flow [2021-11-02 23:20:34,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 23:20:34,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-11-02 23:20:34,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1443 transitions. [2021-11-02 23:20:34,789 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8409090909090909 [2021-11-02 23:20:34,789 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1443 transitions. [2021-11-02 23:20:34,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1443 transitions. [2021-11-02 23:20:34,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:20:34,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1443 transitions. [2021-11-02 23:20:34,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 55.5) internal successors, (1443), 26 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:34,794 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) [2021-11-02 23:20:34,795 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) [2021-11-02 23:20:34,795 INFO L186 Difference]: Start difference. First operand has 332 places, 296 transitions, 7530 flow. Second operand 26 states and 1443 transitions. [2021-11-02 23:20:34,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 336 transitions, 10731 flow [2021-11-02 23:20:35,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 336 transitions, 10457 flow, removed 105 selfloop flow, removed 16 redundant places. [2021-11-02 23:20:35,290 INFO L242 Difference]: Finished difference. Result has 347 places, 306 transitions, 8207 flow [2021-11-02 23:20:35,291 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=7364, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=8207, PETRI_PLACES=347, PETRI_TRANSITIONS=306} [2021-11-02 23:20:35,291 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 281 predicate places. [2021-11-02 23:20:35,291 INFO L470 AbstractCegarLoop]: Abstraction has has 347 places, 306 transitions, 8207 flow [2021-11-02 23:20:35,291 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) [2021-11-02 23:20:35,291 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:20:35,292 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] [2021-11-02 23:20:35,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-11-02 23:20:35,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:35,493 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:20:35,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:35,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1607040931, now seen corresponding path program 27 times [2021-11-02 23:20:35,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:35,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876793463] [2021-11-02 23:20:35,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:35,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:35,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:35,769 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:35,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:35,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876793463] [2021-11-02 23:20:35,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876793463] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:35,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322478296] [2021-11-02 23:20:35,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:20:35,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:35,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:35,771 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:35,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-02 23:20:36,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-02 23:20:36,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:36,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 23:20:36,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:37,248 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:37,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322478296] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:37,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:20:37,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-02 23:20:37,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779007256] [2021-11-02 23:20:37,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 23:20:37,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:37,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 23:20:37,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:20:37,251 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:20:37,252 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 306 transitions, 8207 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) [2021-11-02 23:20:37,252 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:20:37,252 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:20:37,253 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:20:38,079 INFO L129 PetriNetUnfolder]: 239/1687 cut-off events. [2021-11-02 23:20:38,079 INFO L130 PetriNetUnfolder]: For 150422/150808 co-relation queries the response was YES. [2021-11-02 23:20:38,104 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12593 conditions, 1687 events. 239/1687 cut-off events. For 150422/150808 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 13628 event pairs, 0 based on Foata normal form. 103/1610 useless extension candidates. Maximal degree in co-relation 12426. Up to 301 conditions per place. [2021-11-02 23:20:38,118 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 117 selfloop transitions, 172 changer transitions 8/341 dead transitions. [2021-11-02 23:20:38,118 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 341 transitions, 11352 flow [2021-11-02 23:20:38,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 23:20:38,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-11-02 23:20:38,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1555 transitions. [2021-11-02 23:20:38,120 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8414502164502164 [2021-11-02 23:20:38,120 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1555 transitions. [2021-11-02 23:20:38,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1555 transitions. [2021-11-02 23:20:38,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:20:38,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1555 transitions. [2021-11-02 23:20:38,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 55.535714285714285) internal successors, (1555), 28 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:38,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 66.0) internal successors, (1914), 29 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:38,128 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 66.0) internal successors, (1914), 29 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:38,128 INFO L186 Difference]: Start difference. First operand has 347 places, 306 transitions, 8207 flow. Second operand 28 states and 1555 transitions. [2021-11-02 23:20:38,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 341 transitions, 11352 flow [2021-11-02 23:20:38,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 341 transitions, 11030 flow, removed 111 selfloop flow, removed 18 redundant places. [2021-11-02 23:20:38,664 INFO L242 Difference]: Finished difference. Result has 361 places, 311 transitions, 8756 flow [2021-11-02 23:20:38,665 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=8001, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=8756, PETRI_PLACES=361, PETRI_TRANSITIONS=311} [2021-11-02 23:20:38,665 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 295 predicate places. [2021-11-02 23:20:38,665 INFO L470 AbstractCegarLoop]: Abstraction has has 361 places, 311 transitions, 8756 flow [2021-11-02 23:20:38,666 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) [2021-11-02 23:20:38,666 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:20:38,666 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] [2021-11-02 23:20:38,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-02 23:20:38,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-02 23:20:38,881 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:20:38,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:38,881 INFO L85 PathProgramCache]: Analyzing trace with hash 583817531, now seen corresponding path program 28 times [2021-11-02 23:20:38,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:38,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201935504] [2021-11-02 23:20:38,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:38,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:38,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:39,102 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:39,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:39,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201935504] [2021-11-02 23:20:39,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201935504] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:39,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051713864] [2021-11-02 23:20:39,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:20:39,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:39,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:39,109 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:39,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-02 23:20:40,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:20:40,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:40,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 23:20:40,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:40,635 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:40,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051713864] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:40,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:20:40,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-11-02 23:20:40,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489191684] [2021-11-02 23:20:40,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:20:40,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:40,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:20:40,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:20:40,640 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:20:40,641 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 311 transitions, 8756 flow. Second operand has 18 states, 18 states have (on average 54.166666666666664) internal successors, (975), 18 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:40,641 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:20:40,641 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:20:40,641 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:20:41,683 INFO L129 PetriNetUnfolder]: 250/1793 cut-off events. [2021-11-02 23:20:41,684 INFO L130 PetriNetUnfolder]: For 159823/160183 co-relation queries the response was YES. [2021-11-02 23:20:41,710 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13481 conditions, 1793 events. 250/1793 cut-off events. For 159823/160183 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 14735 event pairs, 0 based on Foata normal form. 107/1709 useless extension candidates. Maximal degree in co-relation 13309. Up to 319 conditions per place. [2021-11-02 23:20:41,725 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 108 selfloop transitions, 194 changer transitions 8/354 dead transitions. [2021-11-02 23:20:41,725 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 354 transitions, 12327 flow [2021-11-02 23:20:41,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 23:20:41,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-11-02 23:20:41,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1611 transitions. [2021-11-02 23:20:41,727 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.841692789968652 [2021-11-02 23:20:41,727 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1611 transitions. [2021-11-02 23:20:41,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1611 transitions. [2021-11-02 23:20:41,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:20:41,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1611 transitions. [2021-11-02 23:20:41,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.55172413793103) internal successors, (1611), 29 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:41,732 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) [2021-11-02 23:20:41,733 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) [2021-11-02 23:20:41,733 INFO L186 Difference]: Start difference. First operand has 361 places, 311 transitions, 8756 flow. Second operand 29 states and 1611 transitions. [2021-11-02 23:20:41,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 354 transitions, 12327 flow [2021-11-02 23:20:42,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 354 transitions, 11888 flow, removed 121 selfloop flow, removed 21 redundant places. [2021-11-02 23:20:42,332 INFO L242 Difference]: Finished difference. Result has 373 places, 324 transitions, 9604 flow [2021-11-02 23:20:42,333 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=8441, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=9604, PETRI_PLACES=373, PETRI_TRANSITIONS=324} [2021-11-02 23:20:42,333 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 307 predicate places. [2021-11-02 23:20:42,333 INFO L470 AbstractCegarLoop]: Abstraction has has 373 places, 324 transitions, 9604 flow [2021-11-02 23:20:42,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.166666666666664) internal successors, (975), 18 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:42,334 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:20:42,334 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] [2021-11-02 23:20:42,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-02 23:20:42,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-02 23:20:42,535 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:20:42,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:42,535 INFO L85 PathProgramCache]: Analyzing trace with hash -2070318423, now seen corresponding path program 29 times [2021-11-02 23:20:42,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:42,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745997070] [2021-11-02 23:20:42,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:42,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:42,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:42,706 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:42,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:42,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745997070] [2021-11-02 23:20:42,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745997070] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:42,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227146238] [2021-11-02 23:20:42,708 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:20:42,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:42,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:42,709 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:42,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-02 23:20:43,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-02 23:20:43,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:43,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 23:20:43,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:44,154 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:44,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227146238] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:44,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:20:44,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-02 23:20:44,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358289086] [2021-11-02 23:20:44,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 23:20:44,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:44,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 23:20:44,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:20:44,158 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:20:44,159 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 324 transitions, 9604 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) [2021-11-02 23:20:44,159 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:20:44,159 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:20:44,159 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:20:45,187 INFO L129 PetriNetUnfolder]: 263/1881 cut-off events. [2021-11-02 23:20:45,188 INFO L130 PetriNetUnfolder]: For 176182/176599 co-relation queries the response was YES. [2021-11-02 23:20:45,237 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14538 conditions, 1881 events. 263/1881 cut-off events. For 176182/176599 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 15789 event pairs, 0 based on Foata normal form. 124/1805 useless extension candidates. Maximal degree in co-relation 14361. Up to 339 conditions per place. [2021-11-02 23:20:45,256 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 95 selfloop transitions, 222 changer transitions 8/369 dead transitions. [2021-11-02 23:20:45,256 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 369 transitions, 13410 flow [2021-11-02 23:20:45,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-02 23:20:45,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-11-02 23:20:45,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1667 transitions. [2021-11-02 23:20:45,258 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.841919191919192 [2021-11-02 23:20:45,258 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1667 transitions. [2021-11-02 23:20:45,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1667 transitions. [2021-11-02 23:20:45,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:20:45,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1667 transitions. [2021-11-02 23:20:45,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 55.56666666666667) internal successors, (1667), 30 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:45,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:45,265 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:45,265 INFO L186 Difference]: Start difference. First operand has 373 places, 324 transitions, 9604 flow. Second operand 30 states and 1667 transitions. [2021-11-02 23:20:45,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 369 transitions, 13410 flow [2021-11-02 23:20:45,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 369 transitions, 12854 flow, removed 154 selfloop flow, removed 23 redundant places. [2021-11-02 23:20:45,782 INFO L242 Difference]: Finished difference. Result has 384 places, 339 transitions, 10458 flow [2021-11-02 23:20:45,783 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=9144, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=10458, PETRI_PLACES=384, PETRI_TRANSITIONS=339} [2021-11-02 23:20:45,783 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 318 predicate places. [2021-11-02 23:20:45,783 INFO L470 AbstractCegarLoop]: Abstraction has has 384 places, 339 transitions, 10458 flow [2021-11-02 23:20:45,783 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) [2021-11-02 23:20:45,783 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:20:45,783 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] [2021-11-02 23:20:45,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-02 23:20:45,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-02 23:20:45,984 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:20:45,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:45,984 INFO L85 PathProgramCache]: Analyzing trace with hash -356060751, now seen corresponding path program 30 times [2021-11-02 23:20:45,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:45,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172842010] [2021-11-02 23:20:45,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:45,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:46,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:46,176 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:46,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:46,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172842010] [2021-11-02 23:20:46,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172842010] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:46,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445496708] [2021-11-02 23:20:46,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:20:46,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:46,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:46,180 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:46,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-02 23:20:47,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-02 23:20:47,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:47,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 23:20:47,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:47,563 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:47,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445496708] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:47,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:20:47,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-11-02 23:20:47,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829945079] [2021-11-02 23:20:47,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:20:47,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:47,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:20:47,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:20:47,566 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:20:47,567 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 339 transitions, 10458 flow. Second operand has 18 states, 18 states have (on average 54.166666666666664) internal successors, (975), 18 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:47,567 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:20:47,567 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:20:47,568 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:20:48,721 INFO L129 PetriNetUnfolder]: 274/1972 cut-off events. [2021-11-02 23:20:48,721 INFO L130 PetriNetUnfolder]: For 194731/195166 co-relation queries the response was YES. [2021-11-02 23:20:48,749 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15561 conditions, 1972 events. 274/1972 cut-off events. For 194731/195166 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 16874 event pairs, 0 based on Foata normal form. 137/1901 useless extension candidates. Maximal degree in co-relation 15379. Up to 355 conditions per place. [2021-11-02 23:20:48,766 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 89 selfloop transitions, 241 changer transitions 8/382 dead transitions. [2021-11-02 23:20:48,766 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 382 transitions, 14365 flow [2021-11-02 23:20:48,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 23:20:48,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-11-02 23:20:48,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1723 transitions. [2021-11-02 23:20:48,768 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8421309872922776 [2021-11-02 23:20:48,768 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1723 transitions. [2021-11-02 23:20:48,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1723 transitions. [2021-11-02 23:20:48,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:20:48,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1723 transitions. [2021-11-02 23:20:48,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 55.58064516129032) internal successors, (1723), 31 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:48,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:48,773 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:48,773 INFO L186 Difference]: Start difference. First operand has 384 places, 339 transitions, 10458 flow. Second operand 31 states and 1723 transitions. [2021-11-02 23:20:48,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 382 transitions, 14365 flow [2021-11-02 23:20:49,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 382 transitions, 13742 flow, removed 196 selfloop flow, removed 22 redundant places. [2021-11-02 23:20:49,467 INFO L242 Difference]: Finished difference. Result has 396 places, 351 transitions, 11211 flow [2021-11-02 23:20:49,468 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=9977, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=11211, PETRI_PLACES=396, PETRI_TRANSITIONS=351} [2021-11-02 23:20:49,468 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 330 predicate places. [2021-11-02 23:20:49,468 INFO L470 AbstractCegarLoop]: Abstraction has has 396 places, 351 transitions, 11211 flow [2021-11-02 23:20:49,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.166666666666664) internal successors, (975), 18 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:49,469 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:20:49,469 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] [2021-11-02 23:20:49,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-02 23:20:49,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-02 23:20:49,697 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:20:49,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:49,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1722513397, now seen corresponding path program 31 times [2021-11-02 23:20:49,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:49,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22380589] [2021-11-02 23:20:49,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:49,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:49,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:49,904 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:49,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:49,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22380589] [2021-11-02 23:20:49,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22380589] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:49,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813172593] [2021-11-02 23:20:49,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:20:49,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:49,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:49,906 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:49,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-02 23:20:51,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:51,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 23:20:51,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:51,299 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:51,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813172593] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:51,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:20:51,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-02 23:20:51,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171227052] [2021-11-02 23:20:51,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 23:20:51,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:51,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 23:20:51,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:20:51,302 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:20:51,302 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 351 transitions, 11211 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) [2021-11-02 23:20:51,302 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:20:51,303 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:20:51,303 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:20:52,372 INFO L129 PetriNetUnfolder]: 289/2054 cut-off events. [2021-11-02 23:20:52,372 INFO L130 PetriNetUnfolder]: For 211353/211850 co-relation queries the response was YES. [2021-11-02 23:20:52,406 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16720 conditions, 2054 events. 289/2054 cut-off events. For 211353/211850 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 17497 event pairs, 0 based on Foata normal form. 148/1985 useless extension candidates. Maximal degree in co-relation 16533. Up to 373 conditions per place. [2021-11-02 23:20:52,424 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 83 selfloop transitions, 257 changer transitions 8/392 dead transitions. [2021-11-02 23:20:52,424 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 392 transitions, 15175 flow [2021-11-02 23:20:52,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-02 23:20:52,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-11-02 23:20:52,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1783 transitions. [2021-11-02 23:20:52,427 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8442234848484849 [2021-11-02 23:20:52,427 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1783 transitions. [2021-11-02 23:20:52,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1783 transitions. [2021-11-02 23:20:52,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:20:52,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1783 transitions. [2021-11-02 23:20:52,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.71875) internal successors, (1783), 32 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:52,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 66.0) internal successors, (2178), 33 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:52,433 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 66.0) internal successors, (2178), 33 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:52,434 INFO L186 Difference]: Start difference. First operand has 396 places, 351 transitions, 11211 flow. Second operand 32 states and 1783 transitions. [2021-11-02 23:20:52,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 392 transitions, 15175 flow [2021-11-02 23:20:53,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 392 transitions, 14410 flow, removed 226 selfloop flow, removed 25 redundant places. [2021-11-02 23:20:53,342 INFO L242 Difference]: Finished difference. Result has 406 places, 357 transitions, 11707 flow [2021-11-02 23:20:53,343 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=10612, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=11707, PETRI_PLACES=406, PETRI_TRANSITIONS=357} [2021-11-02 23:20:53,344 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 340 predicate places. [2021-11-02 23:20:53,344 INFO L470 AbstractCegarLoop]: Abstraction has has 406 places, 357 transitions, 11707 flow [2021-11-02 23:20:53,344 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) [2021-11-02 23:20:53,344 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:20:53,345 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] [2021-11-02 23:20:53,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-02 23:20:53,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-02 23:20:53,561 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:20:53,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:53,562 INFO L85 PathProgramCache]: Analyzing trace with hash 11312507, now seen corresponding path program 32 times [2021-11-02 23:20:53,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:53,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954325776] [2021-11-02 23:20:53,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:53,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:53,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:53,811 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:53,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:53,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954325776] [2021-11-02 23:20:53,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954325776] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:53,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664157902] [2021-11-02 23:20:53,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:20:53,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:53,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:53,814 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:53,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-02 23:20:55,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:20:55,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:55,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-02 23:20:55,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:55,561 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:55,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664157902] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:55,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:20:55,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-11-02 23:20:55,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658758603] [2021-11-02 23:20:55,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:20:55,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:55,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:20:55,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:20:55,564 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:20:55,565 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 357 transitions, 11707 flow. Second operand has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:55,565 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:20:55,565 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:20:55,565 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:20:56,934 INFO L129 PetriNetUnfolder]: 295/2093 cut-off events. [2021-11-02 23:20:56,935 INFO L130 PetriNetUnfolder]: For 232970/233490 co-relation queries the response was YES. [2021-11-02 23:20:56,970 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17621 conditions, 2093 events. 295/2093 cut-off events. For 232970/233490 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 18036 event pairs, 0 based on Foata normal form. 153/2026 useless extension candidates. Maximal degree in co-relation 17429. Up to 381 conditions per place. [2021-11-02 23:20:56,989 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 82 selfloop transitions, 267 changer transitions 17/410 dead transitions. [2021-11-02 23:20:56,989 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 410 transitions, 16893 flow [2021-11-02 23:20:56,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-02 23:20:56,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-02 23:20:56,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2004 transitions. [2021-11-02 23:20:56,993 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8434343434343434 [2021-11-02 23:20:56,993 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2004 transitions. [2021-11-02 23:20:56,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2004 transitions. [2021-11-02 23:20:56,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:20:56,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2004 transitions. [2021-11-02 23:20:56,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.666666666666664) internal successors, (2004), 36 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:57,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:57,002 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:57,002 INFO L186 Difference]: Start difference. First operand has 406 places, 357 transitions, 11707 flow. Second operand 36 states and 2004 transitions. [2021-11-02 23:20:57,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 410 transitions, 16893 flow [2021-11-02 23:20:57,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 410 transitions, 15799 flow, removed 337 selfloop flow, removed 28 redundant places. [2021-11-02 23:20:57,721 INFO L242 Difference]: Finished difference. Result has 420 places, 369 transitions, 12491 flow [2021-11-02 23:20:57,722 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=11019, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=12491, PETRI_PLACES=420, PETRI_TRANSITIONS=369} [2021-11-02 23:20:57,723 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 354 predicate places. [2021-11-02 23:20:57,723 INFO L470 AbstractCegarLoop]: Abstraction has has 420 places, 369 transitions, 12491 flow [2021-11-02 23:20:57,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:57,723 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:20:57,724 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:57,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-02 23:20:57,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:57,937 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:20:57,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:57,937 INFO L85 PathProgramCache]: Analyzing trace with hash 935917035, now seen corresponding path program 33 times [2021-11-02 23:20:57,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:57,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908103749] [2021-11-02 23:20:57,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:57,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:57,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:58,186 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:58,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:58,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908103749] [2021-11-02 23:20:58,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908103749] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:58,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926913908] [2021-11-02 23:20:58,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:20:58,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:58,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:58,188 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:58,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-02 23:20:59,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-02 23:20:59,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:59,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-02 23:20:59,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:59,998 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:59,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926913908] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:59,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:21:00,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-02 23:21:00,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583235234] [2021-11-02 23:21:00,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:21:00,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:00,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:21:00,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:21:00,001 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:21:00,002 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 369 transitions, 12491 flow. Second operand has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:00,002 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:21:00,002 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:21:00,003 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:21:01,054 INFO L129 PetriNetUnfolder]: 291/2087 cut-off events. [2021-11-02 23:21:01,055 INFO L130 PetriNetUnfolder]: For 254948/255430 co-relation queries the response was YES. [2021-11-02 23:21:01,082 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17742 conditions, 2087 events. 291/2087 cut-off events. For 254948/255430 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 17967 event pairs, 0 based on Foata normal form. 60/1926 useless extension candidates. Maximal degree in co-relation 17545. Up to 450 conditions per place. [2021-11-02 23:21:01,102 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 296 selfloop transitions, 51 changer transitions 8/399 dead transitions. [2021-11-02 23:21:01,102 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 399 transitions, 15597 flow [2021-11-02 23:21:01,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 23:21:01,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-11-02 23:21:01,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1166 transitions. [2021-11-02 23:21:01,104 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8412698412698413 [2021-11-02 23:21:01,104 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1166 transitions. [2021-11-02 23:21:01,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1166 transitions. [2021-11-02 23:21:01,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:21:01,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1166 transitions. [2021-11-02 23:21:01,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 55.523809523809526) internal successors, (1166), 21 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:01,107 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) [2021-11-02 23:21:01,107 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) [2021-11-02 23:21:01,108 INFO L186 Difference]: Start difference. First operand has 420 places, 369 transitions, 12491 flow. Second operand 21 states and 1166 transitions. [2021-11-02 23:21:01,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 399 transitions, 15597 flow [2021-11-02 23:21:01,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 399 transitions, 14420 flow, removed 369 selfloop flow, removed 30 redundant places. [2021-11-02 23:21:01,936 INFO L242 Difference]: Finished difference. Result has 410 places, 371 transitions, 11717 flow [2021-11-02 23:21:01,937 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=11404, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=11717, PETRI_PLACES=410, PETRI_TRANSITIONS=371} [2021-11-02 23:21:01,937 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 344 predicate places. [2021-11-02 23:21:01,937 INFO L470 AbstractCegarLoop]: Abstraction has has 410 places, 371 transitions, 11717 flow [2021-11-02 23:21:01,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:01,938 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:21:01,938 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:01,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-11-02 23:21:02,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-02 23:21:02,140 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:21:02,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:02,141 INFO L85 PathProgramCache]: Analyzing trace with hash -268180483, now seen corresponding path program 34 times [2021-11-02 23:21:02,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:02,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11749077] [2021-11-02 23:21:02,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:02,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:02,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:02,374 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:02,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:02,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11749077] [2021-11-02 23:21:02,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11749077] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:02,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701581345] [2021-11-02 23:21:02,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:21:02,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:02,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:21:02,376 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:21:02,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-02 23:21:03,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:21:03,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:21:03,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-02 23:21:03,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:21:04,073 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:04,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701581345] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:04,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:21:04,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-11-02 23:21:04,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013178460] [2021-11-02 23:21:04,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 23:21:04,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:04,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 23:21:04,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:21:04,076 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:21:04,078 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 371 transitions, 11717 flow. Second operand has 19 states, 19 states have (on average 54.1578947368421) internal successors, (1029), 19 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:04,078 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:21:04,078 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:21:04,078 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:21:05,176 INFO L129 PetriNetUnfolder]: 299/2152 cut-off events. [2021-11-02 23:21:05,176 INFO L130 PetriNetUnfolder]: For 258877/259350 co-relation queries the response was YES. [2021-11-02 23:21:05,213 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17931 conditions, 2152 events. 299/2152 cut-off events. For 258877/259350 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 18734 event pairs, 0 based on Foata normal form. 75/1999 useless extension candidates. Maximal degree in co-relation 17733. Up to 385 conditions per place. [2021-11-02 23:21:05,233 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 258 selfloop transitions, 98 changer transitions 8/408 dead transitions. [2021-11-02 23:21:05,233 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 408 transitions, 15293 flow [2021-11-02 23:21:05,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-02 23:21:05,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-11-02 23:21:05,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1386 transitions. [2021-11-02 23:21:05,236 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.84 [2021-11-02 23:21:05,236 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1386 transitions. [2021-11-02 23:21:05,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1386 transitions. [2021-11-02 23:21:05,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:21:05,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1386 transitions. [2021-11-02 23:21:05,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 55.44) internal successors, (1386), 25 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) [2021-11-02 23:21:05,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:05,242 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:05,242 INFO L186 Difference]: Start difference. First operand has 410 places, 371 transitions, 11717 flow. Second operand 25 states and 1386 transitions. [2021-11-02 23:21:05,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 408 transitions, 15293 flow [2021-11-02 23:21:06,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 408 transitions, 14922 flow, removed 139 selfloop flow, removed 18 redundant places. [2021-11-02 23:21:06,131 INFO L242 Difference]: Finished difference. Result has 422 places, 379 transitions, 12334 flow [2021-11-02 23:21:06,132 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=11502, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=12334, PETRI_PLACES=422, PETRI_TRANSITIONS=379} [2021-11-02 23:21:06,132 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 356 predicate places. [2021-11-02 23:21:06,132 INFO L470 AbstractCegarLoop]: Abstraction has has 422 places, 379 transitions, 12334 flow [2021-11-02 23:21:06,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.1578947368421) internal successors, (1029), 19 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:06,133 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:21:06,133 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:06,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-02 23:21:06,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-02 23:21:06,336 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:21:06,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:06,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1705665643, now seen corresponding path program 35 times [2021-11-02 23:21:06,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:06,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718293021] [2021-11-02 23:21:06,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:06,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:06,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:06,575 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:06,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:06,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718293021] [2021-11-02 23:21:06,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718293021] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:06,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592838022] [2021-11-02 23:21:06,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:21:06,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:06,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:21:06,581 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:21:06,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-02 23:21:07,899 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-02 23:21:07,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:21:07,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-02 23:21:07,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:21:08,345 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:08,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592838022] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:08,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:21:08,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-02 23:21:08,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331887814] [2021-11-02 23:21:08,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:21:08,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:08,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:21:08,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:21:08,348 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:21:08,349 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 379 transitions, 12334 flow. Second operand has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:08,349 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:21:08,349 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:21:08,350 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:21:09,439 INFO L129 PetriNetUnfolder]: 301/2170 cut-off events. [2021-11-02 23:21:09,439 INFO L130 PetriNetUnfolder]: For 254257/254720 co-relation queries the response was YES. [2021-11-02 23:21:09,476 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18035 conditions, 2170 events. 301/2170 cut-off events. For 254257/254720 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 18914 event pairs, 0 based on Foata normal form. 78/2018 useless extension candidates. Maximal degree in co-relation 17831. Up to 385 conditions per place. [2021-11-02 23:21:09,496 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 223 selfloop transitions, 135 changer transitions 8/410 dead transitions. [2021-11-02 23:21:09,496 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 410 transitions, 15600 flow [2021-11-02 23:21:09,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 23:21:09,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-11-02 23:21:09,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1331 transitions. [2021-11-02 23:21:09,498 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8402777777777778 [2021-11-02 23:21:09,499 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1331 transitions. [2021-11-02 23:21:09,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1331 transitions. [2021-11-02 23:21:09,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:21:09,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1331 transitions. [2021-11-02 23:21:09,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 55.458333333333336) internal successors, (1331), 24 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:09,502 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) [2021-11-02 23:21:09,503 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) [2021-11-02 23:21:09,503 INFO L186 Difference]: Start difference. First operand has 422 places, 379 transitions, 12334 flow. Second operand 24 states and 1331 transitions. [2021-11-02 23:21:09,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 410 transitions, 15600 flow [2021-11-02 23:21:10,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 410 transitions, 15268 flow, removed 105 selfloop flow, removed 18 redundant places. [2021-11-02 23:21:10,611 INFO L242 Difference]: Finished difference. Result has 429 places, 381 transitions, 12605 flow [2021-11-02 23:21:10,612 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=12110, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=12605, PETRI_PLACES=429, PETRI_TRANSITIONS=381} [2021-11-02 23:21:10,612 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 363 predicate places. [2021-11-02 23:21:10,612 INFO L470 AbstractCegarLoop]: Abstraction has has 429 places, 381 transitions, 12605 flow [2021-11-02 23:21:10,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:10,613 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:21:10,613 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:10,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-02 23:21:10,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:10,841 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:21:10,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:10,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1584691767, now seen corresponding path program 36 times [2021-11-02 23:21:10,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:10,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632099505] [2021-11-02 23:21:10,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:10,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:10,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:11,068 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:11,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:11,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632099505] [2021-11-02 23:21:11,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632099505] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:11,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252217799] [2021-11-02 23:21:11,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:21:11,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:11,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:21:11,070 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:21:11,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-02 23:21:12,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-02 23:21:12,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:21:12,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-02 23:21:12,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:21:12,909 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:12,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252217799] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:12,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:21:12,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-11-02 23:21:12,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862321376] [2021-11-02 23:21:12,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 23:21:12,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:12,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 23:21:12,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:21:12,912 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:21:12,913 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 381 transitions, 12605 flow. Second operand has 19 states, 19 states have (on average 54.1578947368421) internal successors, (1029), 19 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:12,913 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:21:12,913 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:21:12,913 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:21:14,174 INFO L129 PetriNetUnfolder]: 315/2296 cut-off events. [2021-11-02 23:21:14,174 INFO L130 PetriNetUnfolder]: For 268243/268706 co-relation queries the response was YES. [2021-11-02 23:21:14,216 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19199 conditions, 2296 events. 315/2296 cut-off events. For 268243/268706 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 20521 event pairs, 0 based on Foata normal form. 94/2146 useless extension candidates. Maximal degree in co-relation 18993. Up to 409 conditions per place. [2021-11-02 23:21:14,244 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 198 selfloop transitions, 175 changer transitions 8/425 dead transitions. [2021-11-02 23:21:14,244 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 425 transitions, 16646 flow [2021-11-02 23:21:14,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 23:21:14,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-11-02 23:21:14,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1498 transitions. [2021-11-02 23:21:14,247 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8406285072951739 [2021-11-02 23:21:14,248 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1498 transitions. [2021-11-02 23:21:14,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1498 transitions. [2021-11-02 23:21:14,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:21:14,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1498 transitions. [2021-11-02 23:21:14,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 55.48148148148148) internal successors, (1498), 27 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:14,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:14,252 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:14,252 INFO L186 Difference]: Start difference. First operand has 429 places, 381 transitions, 12605 flow. Second operand 27 states and 1498 transitions. [2021-11-02 23:21:14,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 425 transitions, 16646 flow [2021-11-02 23:21:15,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 425 transitions, 16210 flow, removed 107 selfloop flow, removed 20 redundant places. [2021-11-02 23:21:15,218 INFO L242 Difference]: Finished difference. Result has 441 places, 395 transitions, 13656 flow [2021-11-02 23:21:15,218 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=12281, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=13656, PETRI_PLACES=441, PETRI_TRANSITIONS=395} [2021-11-02 23:21:15,218 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 375 predicate places. [2021-11-02 23:21:15,219 INFO L470 AbstractCegarLoop]: Abstraction has has 441 places, 395 transitions, 13656 flow [2021-11-02 23:21:15,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.1578947368421) internal successors, (1029), 19 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:15,219 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:21:15,219 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:15,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-02 23:21:15,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-02 23:21:15,420 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:21:15,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:15,421 INFO L85 PathProgramCache]: Analyzing trace with hash -2061298355, now seen corresponding path program 37 times [2021-11-02 23:21:15,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:15,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090805911] [2021-11-02 23:21:15,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:15,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:15,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:15,689 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:15,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:15,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090805911] [2021-11-02 23:21:15,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090805911] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:15,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143329888] [2021-11-02 23:21:15,690 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:21:15,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:15,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:21:15,692 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:21:15,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-02 23:21:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:17,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-02 23:21:17,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:21:18,167 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:18,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143329888] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:18,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:21:18,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-02 23:21:18,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897145609] [2021-11-02 23:21:18,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:21:18,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:18,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:21:18,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:21:18,171 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:21:18,172 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 395 transitions, 13656 flow. Second operand has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:18,172 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:21:18,172 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:21:18,172 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:21:19,350 INFO L129 PetriNetUnfolder]: 319/2339 cut-off events. [2021-11-02 23:21:19,350 INFO L130 PetriNetUnfolder]: For 274101/274532 co-relation queries the response was YES. [2021-11-02 23:21:19,395 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19684 conditions, 2339 events. 319/2339 cut-off events. For 274101/274532 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 20980 event pairs, 0 based on Foata normal form. 100/2190 useless extension candidates. Maximal degree in co-relation 19472. Up to 417 conditions per place. [2021-11-02 23:21:19,418 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 173 selfloop transitions, 206 changer transitions 8/431 dead transitions. [2021-11-02 23:21:19,418 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 431 transitions, 17260 flow [2021-11-02 23:21:19,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 23:21:19,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-11-02 23:21:19,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1443 transitions. [2021-11-02 23:21:19,420 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8409090909090909 [2021-11-02 23:21:19,420 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1443 transitions. [2021-11-02 23:21:19,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1443 transitions. [2021-11-02 23:21:19,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:21:19,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1443 transitions. [2021-11-02 23:21:19,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 55.5) internal successors, (1443), 26 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:19,423 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) [2021-11-02 23:21:19,423 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) [2021-11-02 23:21:19,423 INFO L186 Difference]: Start difference. First operand has 441 places, 395 transitions, 13656 flow. Second operand 26 states and 1443 transitions. [2021-11-02 23:21:19,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 431 transitions, 17260 flow [2021-11-02 23:21:20,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 431 transitions, 16811 flow, removed 113 selfloop flow, removed 21 redundant places. [2021-11-02 23:21:20,472 INFO L242 Difference]: Finished difference. Result has 449 places, 399 transitions, 14150 flow [2021-11-02 23:21:20,472 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=13323, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=14150, PETRI_PLACES=449, PETRI_TRANSITIONS=399} [2021-11-02 23:21:20,472 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 383 predicate places. [2021-11-02 23:21:20,473 INFO L470 AbstractCegarLoop]: Abstraction has has 449 places, 399 transitions, 14150 flow [2021-11-02 23:21:20,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:20,473 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:21:20,473 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:20,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-11-02 23:21:20,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-02 23:21:20,674 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:21:20,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:20,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1100370105, now seen corresponding path program 38 times [2021-11-02 23:21:20,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:20,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370201659] [2021-11-02 23:21:20,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:20,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:20,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:20,884 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:20,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:20,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370201659] [2021-11-02 23:21:20,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370201659] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:20,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80440878] [2021-11-02 23:21:20,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:21:20,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:20,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:21:20,887 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:21:20,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-02 23:21:22,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:21:22,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:21:22,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-02 23:21:22,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:21:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:22,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80440878] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:22,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:21:22,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-02 23:21:22,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516565470] [2021-11-02 23:21:22,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:21:22,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:22,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:21:22,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:21:22,750 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:21:22,751 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 399 transitions, 14150 flow. Second operand has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:22,751 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:21:22,752 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:21:22,752 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:21:24,231 INFO L129 PetriNetUnfolder]: 323/2354 cut-off events. [2021-11-02 23:21:24,232 INFO L130 PetriNetUnfolder]: For 281542/282014 co-relation queries the response was YES. [2021-11-02 23:21:24,265 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20132 conditions, 2354 events. 323/2354 cut-off events. For 281542/282014 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 21138 event pairs, 0 based on Foata normal form. 143/2248 useless extension candidates. Maximal degree in co-relation 19916. Up to 425 conditions per place. [2021-11-02 23:21:24,287 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 93 selfloop transitions, 295 changer transitions 8/440 dead transitions. [2021-11-02 23:21:24,287 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 440 transitions, 18227 flow [2021-11-02 23:21:24,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-02 23:21:24,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-11-02 23:21:24,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1667 transitions. [2021-11-02 23:21:24,289 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.841919191919192 [2021-11-02 23:21:24,289 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1667 transitions. [2021-11-02 23:21:24,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1667 transitions. [2021-11-02 23:21:24,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:21:24,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1667 transitions. [2021-11-02 23:21:24,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 55.56666666666667) internal successors, (1667), 30 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:24,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:24,293 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:24,293 INFO L186 Difference]: Start difference. First operand has 449 places, 399 transitions, 14150 flow. Second operand 30 states and 1667 transitions. [2021-11-02 23:21:24,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 440 transitions, 18227 flow [2021-11-02 23:21:25,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 440 transitions, 17754 flow, removed 123 selfloop flow, removed 19 redundant places. [2021-11-02 23:21:25,381 INFO L242 Difference]: Finished difference. Result has 463 places, 404 transitions, 14912 flow [2021-11-02 23:21:25,382 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=13813, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=14912, PETRI_PLACES=463, PETRI_TRANSITIONS=404} [2021-11-02 23:21:25,382 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 397 predicate places. [2021-11-02 23:21:25,382 INFO L470 AbstractCegarLoop]: Abstraction has has 463 places, 404 transitions, 14912 flow [2021-11-02 23:21:25,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.111111111111114) internal successors, (974), 18 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:25,383 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:21:25,383 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:25,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-02 23:21:25,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-02 23:21:25,597 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:21:25,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:25,597 INFO L85 PathProgramCache]: Analyzing trace with hash -147723957, now seen corresponding path program 39 times [2021-11-02 23:21:25,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:25,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142143604] [2021-11-02 23:21:25,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:25,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:25,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:25,809 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:25,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:25,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142143604] [2021-11-02 23:21:25,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142143604] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:25,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681870394] [2021-11-02 23:21:25,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:21:25,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:25,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:21:25,811 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:21:25,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-02 23:21:27,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-02 23:21:27,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:21:27,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 23:21:27,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:21:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:27,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681870394] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:27,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:21:27,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-11-02 23:21:27,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401423620] [2021-11-02 23:21:27,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 23:21:27,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:27,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 23:21:27,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:21:27,645 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:21:27,645 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 404 transitions, 14912 flow. Second operand has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:27,646 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:21:27,646 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:21:27,646 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:21:29,288 INFO L129 PetriNetUnfolder]: 335/2409 cut-off events. [2021-11-02 23:21:29,289 INFO L130 PetriNetUnfolder]: For 302165/302647 co-relation queries the response was YES. [2021-11-02 23:21:29,337 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21325 conditions, 2409 events. 335/2409 cut-off events. For 302165/302647 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 21546 event pairs, 0 based on Foata normal form. 152/2309 useless extension candidates. Maximal degree in co-relation 21105. Up to 441 conditions per place. [2021-11-02 23:21:29,360 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 77 selfloop transitions, 324 changer transitions 14/459 dead transitions. [2021-11-02 23:21:29,360 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 459 transitions, 20304 flow [2021-11-02 23:21:29,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-02 23:21:29,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-02 23:21:29,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2004 transitions. [2021-11-02 23:21:29,362 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8434343434343434 [2021-11-02 23:21:29,363 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2004 transitions. [2021-11-02 23:21:29,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2004 transitions. [2021-11-02 23:21:29,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:21:29,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2004 transitions. [2021-11-02 23:21:29,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.666666666666664) internal successors, (2004), 36 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:29,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:29,369 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:29,369 INFO L186 Difference]: Start difference. First operand has 463 places, 404 transitions, 14912 flow. Second operand 36 states and 2004 transitions. [2021-11-02 23:21:29,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 459 transitions, 20304 flow [2021-11-02 23:21:30,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 459 transitions, 19456 flow, removed 192 selfloop flow, removed 24 redundant places. [2021-11-02 23:21:30,695 INFO L242 Difference]: Finished difference. Result has 482 places, 416 transitions, 15814 flow [2021-11-02 23:21:30,696 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=14206, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=313, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=15814, PETRI_PLACES=482, PETRI_TRANSITIONS=416} [2021-11-02 23:21:30,696 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 416 predicate places. [2021-11-02 23:21:30,696 INFO L470 AbstractCegarLoop]: Abstraction has has 482 places, 416 transitions, 15814 flow [2021-11-02 23:21:30,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:30,697 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:21:30,697 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:30,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-11-02 23:21:30,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:30,898 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:21:30,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:30,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1140535151, now seen corresponding path program 40 times [2021-11-02 23:21:30,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:30,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738958764] [2021-11-02 23:21:30,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:30,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:30,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:31,133 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 23:21:31,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:31,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738958764] [2021-11-02 23:21:31,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738958764] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:31,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534102564] [2021-11-02 23:21:31,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:21:31,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:31,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:21:31,141 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:21:31,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-02 23:21:32,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:21:32,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:21:32,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-02 23:21:32,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:21:33,047 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 23:21:33,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534102564] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:33,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:21:33,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-02 23:21:33,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752256970] [2021-11-02 23:21:33,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:21:33,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:33,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:21:33,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:21:33,051 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:21:33,052 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 416 transitions, 15814 flow. Second operand has 18 states, 18 states have (on average 54.166666666666664) internal successors, (975), 18 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:33,052 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:21:33,052 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:21:33,053 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:21:34,689 INFO L129 PetriNetUnfolder]: 332/2419 cut-off events. [2021-11-02 23:21:34,689 INFO L130 PetriNetUnfolder]: For 347488/347962 co-relation queries the response was YES. [2021-11-02 23:21:34,740 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22247 conditions, 2419 events. 332/2419 cut-off events. For 347488/347962 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 21817 event pairs, 0 based on Foata normal form. 162/2326 useless extension candidates. Maximal degree in co-relation 22019. Up to 437 conditions per place. [2021-11-02 23:21:34,764 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 114 selfloop transitions, 285 changer transitions 5/448 dead transitions. [2021-11-02 23:21:34,764 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 448 transitions, 19898 flow [2021-11-02 23:21:34,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 23:21:34,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-11-02 23:21:34,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1723 transitions. [2021-11-02 23:21:34,768 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8421309872922776 [2021-11-02 23:21:34,768 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1723 transitions. [2021-11-02 23:21:34,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1723 transitions. [2021-11-02 23:21:34,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:21:34,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1723 transitions. [2021-11-02 23:21:34,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 55.58064516129032) internal successors, (1723), 31 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:34,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:34,775 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:34,775 INFO L186 Difference]: Start difference. First operand has 482 places, 416 transitions, 15814 flow. Second operand 31 states and 1723 transitions. [2021-11-02 23:21:34,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 448 transitions, 19898 flow [2021-11-02 23:21:36,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 448 transitions, 18624 flow, removed 402 selfloop flow, removed 27 redundant places. [2021-11-02 23:21:36,519 INFO L242 Difference]: Finished difference. Result has 484 places, 419 transitions, 15623 flow [2021-11-02 23:21:36,520 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=14728, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=15623, PETRI_PLACES=484, PETRI_TRANSITIONS=419} [2021-11-02 23:21:36,521 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 418 predicate places. [2021-11-02 23:21:36,521 INFO L470 AbstractCegarLoop]: Abstraction has has 484 places, 419 transitions, 15623 flow [2021-11-02 23:21:36,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.166666666666664) internal successors, (975), 18 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:36,521 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:21:36,522 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:36,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-02 23:21:36,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:36,737 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:21:36,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:36,737 INFO L85 PathProgramCache]: Analyzing trace with hash 880298984, now seen corresponding path program 41 times [2021-11-02 23:21:36,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:36,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123519773] [2021-11-02 23:21:36,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:36,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:36,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:36,997 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:36,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:36,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123519773] [2021-11-02 23:21:36,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123519773] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:36,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884826856] [2021-11-02 23:21:36,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:21:36,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:36,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:21:36,999 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:21:37,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-02 23:21:38,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-02 23:21:38,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:21:38,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 23:21:38,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:21:39,078 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:39,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884826856] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:39,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:21:39,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-11-02 23:21:39,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563511910] [2021-11-02 23:21:39,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:21:39,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:39,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:21:39,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:21:39,081 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:21:39,082 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 419 transitions, 15623 flow. Second operand has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:39,082 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:21:39,082 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:21:39,082 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:21:40,376 INFO L129 PetriNetUnfolder]: 336/2426 cut-off events. [2021-11-02 23:21:40,376 INFO L130 PetriNetUnfolder]: For 334594/335145 co-relation queries the response was YES. [2021-11-02 23:21:40,420 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22018 conditions, 2426 events. 336/2426 cut-off events. For 334594/335145 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 21806 event pairs, 0 based on Foata normal form. 68/2234 useless extension candidates. Maximal degree in co-relation 21791. Up to 580 conditions per place. [2021-11-02 23:21:40,444 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 367 selfloop transitions, 27 changer transitions 8/446 dead transitions. [2021-11-02 23:21:40,444 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 446 transitions, 18963 flow [2021-11-02 23:21:40,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 23:21:40,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-11-02 23:21:40,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1165 transitions. [2021-11-02 23:21:40,446 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8405483405483406 [2021-11-02 23:21:40,446 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1165 transitions. [2021-11-02 23:21:40,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1165 transitions. [2021-11-02 23:21:40,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:21:40,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1165 transitions. [2021-11-02 23:21:40,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 55.476190476190474) internal successors, (1165), 21 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:40,450 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) [2021-11-02 23:21:40,450 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) [2021-11-02 23:21:40,451 INFO L186 Difference]: Start difference. First operand has 484 places, 419 transitions, 15623 flow. Second operand 21 states and 1165 transitions. [2021-11-02 23:21:40,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 446 transitions, 18963 flow [2021-11-02 23:21:41,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 446 transitions, 18273 flow, removed 102 selfloop flow, removed 27 redundant places. [2021-11-02 23:21:41,727 INFO L242 Difference]: Finished difference. Result has 480 places, 421 transitions, 15285 flow [2021-11-02 23:21:41,728 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=15011, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=15285, PETRI_PLACES=480, PETRI_TRANSITIONS=421} [2021-11-02 23:21:41,728 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 414 predicate places. [2021-11-02 23:21:41,728 INFO L470 AbstractCegarLoop]: Abstraction has has 480 places, 421 transitions, 15285 flow [2021-11-02 23:21:41,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:41,728 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:21:41,728 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:41,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-11-02 23:21:41,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-02 23:21:41,929 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:21:41,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:41,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1439829906, now seen corresponding path program 42 times [2021-11-02 23:21:41,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:41,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105705872] [2021-11-02 23:21:41,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:41,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:41,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:42,192 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:42,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:42,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105705872] [2021-11-02 23:21:42,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105705872] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:42,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705175277] [2021-11-02 23:21:42,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:21:42,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:42,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:21:42,194 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:21:42,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-02 23:21:43,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-02 23:21:43,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:21:43,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 23:21:43,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:21:44,359 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:44,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705175277] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:44,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:21:44,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-02 23:21:44,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312997208] [2021-11-02 23:21:44,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 23:21:44,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:44,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 23:21:44,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:21:44,361 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:21:44,362 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 421 transitions, 15285 flow. Second operand has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:44,362 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:21:44,362 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:21:44,362 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:21:45,697 INFO L129 PetriNetUnfolder]: 338/2451 cut-off events. [2021-11-02 23:21:45,697 INFO L130 PetriNetUnfolder]: For 341853/342370 co-relation queries the response was YES. [2021-11-02 23:21:45,749 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22119 conditions, 2451 events. 338/2451 cut-off events. For 341853/342370 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 21967 event pairs, 0 based on Foata normal form. 71/2259 useless extension candidates. Maximal degree in co-relation 21890. Up to 544 conditions per place. [2021-11-02 23:21:45,775 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 348 selfloop transitions, 49 changer transitions 8/449 dead transitions. [2021-11-02 23:21:45,775 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 449 transitions, 18749 flow [2021-11-02 23:21:45,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 23:21:45,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-11-02 23:21:45,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1332 transitions. [2021-11-02 23:21:45,777 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8409090909090909 [2021-11-02 23:21:45,777 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1332 transitions. [2021-11-02 23:21:45,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1332 transitions. [2021-11-02 23:21:45,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:21:45,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1332 transitions. [2021-11-02 23:21:45,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 55.5) internal successors, (1332), 24 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:45,782 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) [2021-11-02 23:21:45,782 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) [2021-11-02 23:21:45,783 INFO L186 Difference]: Start difference. First operand has 480 places, 421 transitions, 15285 flow. Second operand 24 states and 1332 transitions. [2021-11-02 23:21:45,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 449 transitions, 18749 flow [2021-11-02 23:21:47,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 449 transitions, 18539 flow, removed 80 selfloop flow, removed 18 redundant places. [2021-11-02 23:21:47,431 INFO L242 Difference]: Finished difference. Result has 487 places, 423 transitions, 15449 flow [2021-11-02 23:21:47,432 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=15123, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=15449, PETRI_PLACES=487, PETRI_TRANSITIONS=423} [2021-11-02 23:21:47,432 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 421 predicate places. [2021-11-02 23:21:47,432 INFO L470 AbstractCegarLoop]: Abstraction has has 487 places, 423 transitions, 15449 flow [2021-11-02 23:21:47,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:47,432 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:21:47,433 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:47,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-02 23:21:47,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:47,633 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:21:47,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:47,634 INFO L85 PathProgramCache]: Analyzing trace with hash 29345650, now seen corresponding path program 43 times [2021-11-02 23:21:47,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:47,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180845031] [2021-11-02 23:21:47,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:47,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:47,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:47,901 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:47,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:47,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180845031] [2021-11-02 23:21:47,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180845031] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:47,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826829827] [2021-11-02 23:21:47,902 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:21:47,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:47,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:21:47,905 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:21:47,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-02 23:21:49,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:49,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 23:21:49,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:21:50,094 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:50,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826829827] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:50,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:21:50,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-11-02 23:21:50,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159051926] [2021-11-02 23:21:50,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:21:50,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:50,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:21:50,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:21:50,097 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:21:50,098 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 423 transitions, 15449 flow. Second operand has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:50,098 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:21:50,098 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:21:50,098 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:21:51,425 INFO L129 PetriNetUnfolder]: 340/2462 cut-off events. [2021-11-02 23:21:51,425 INFO L130 PetriNetUnfolder]: For 353233/353780 co-relation queries the response was YES. [2021-11-02 23:21:51,477 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22552 conditions, 2462 events. 340/2462 cut-off events. For 353233/353780 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 22112 event pairs, 0 based on Foata normal form. 73/2271 useless extension candidates. Maximal degree in co-relation 22321. Up to 512 conditions per place. [2021-11-02 23:21:51,502 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 332 selfloop transitions, 68 changer transitions 8/452 dead transitions. [2021-11-02 23:21:51,502 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 452 transitions, 19087 flow [2021-11-02 23:21:51,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-02 23:21:51,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-11-02 23:21:51,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1388 transitions. [2021-11-02 23:21:51,504 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8412121212121212 [2021-11-02 23:21:51,505 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1388 transitions. [2021-11-02 23:21:51,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1388 transitions. [2021-11-02 23:21:51,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:21:51,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1388 transitions. [2021-11-02 23:21:51,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 55.52) internal successors, (1388), 25 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:51,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:51,510 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:51,510 INFO L186 Difference]: Start difference. First operand has 487 places, 423 transitions, 15449 flow. Second operand 25 states and 1388 transitions. [2021-11-02 23:21:51,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 452 transitions, 19087 flow [2021-11-02 23:21:53,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 452 transitions, 18769 flow, removed 114 selfloop flow, removed 21 redundant places. [2021-11-02 23:21:53,365 INFO L242 Difference]: Finished difference. Result has 492 places, 425 transitions, 15607 flow [2021-11-02 23:21:53,366 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=15239, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=15607, PETRI_PLACES=492, PETRI_TRANSITIONS=425} [2021-11-02 23:21:53,366 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 426 predicate places. [2021-11-02 23:21:53,366 INFO L470 AbstractCegarLoop]: Abstraction has has 492 places, 425 transitions, 15607 flow [2021-11-02 23:21:53,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:53,366 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:21:53,366 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:53,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-11-02 23:21:53,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-11-02 23:21:53,567 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:21:53,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:53,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1559983514, now seen corresponding path program 44 times [2021-11-02 23:21:53,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:53,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070665976] [2021-11-02 23:21:53,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:53,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:53,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:53,835 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:53,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:53,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070665976] [2021-11-02 23:21:53,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070665976] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:53,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990848456] [2021-11-02 23:21:53,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:21:53,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:53,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:21:53,840 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:21:53,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-02 23:21:55,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:21:55,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:21:55,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 23:21:55,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:21:56,102 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:56,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990848456] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:56,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:21:56,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-02 23:21:56,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800202956] [2021-11-02 23:21:56,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 23:21:56,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:56,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 23:21:56,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:21:56,105 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:21:56,106 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 425 transitions, 15607 flow. Second operand has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:56,106 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:21:56,106 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:21:56,106 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:21:57,718 INFO L129 PetriNetUnfolder]: 353/2586 cut-off events. [2021-11-02 23:21:57,718 INFO L130 PetriNetUnfolder]: For 370107/370618 co-relation queries the response was YES. [2021-11-02 23:21:57,774 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23642 conditions, 2586 events. 353/2586 cut-off events. For 370107/370618 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 23542 event pairs, 0 based on Foata normal form. 94/2403 useless extension candidates. Maximal degree in co-relation 23409. Up to 469 conditions per place. [2021-11-02 23:21:57,800 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 244 selfloop transitions, 175 changer transitions 8/471 dead transitions. [2021-11-02 23:21:57,800 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 471 transitions, 20317 flow [2021-11-02 23:21:57,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 23:21:57,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-11-02 23:21:57,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1609 transitions. [2021-11-02 23:21:57,802 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8406478578892372 [2021-11-02 23:21:57,802 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1609 transitions. [2021-11-02 23:21:57,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1609 transitions. [2021-11-02 23:21:57,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:21:57,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1609 transitions. [2021-11-02 23:21:57,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.48275862068966) internal successors, (1609), 29 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:57,805 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) [2021-11-02 23:21:57,805 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) [2021-11-02 23:21:57,806 INFO L186 Difference]: Start difference. First operand has 492 places, 425 transitions, 15607 flow. Second operand 29 states and 1609 transitions. [2021-11-02 23:21:57,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 471 transitions, 20317 flow [2021-11-02 23:21:59,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 471 transitions, 19949 flow, removed 122 selfloop flow, removed 22 redundant places. [2021-11-02 23:21:59,354 INFO L242 Difference]: Finished difference. Result has 507 places, 439 transitions, 16870 flow [2021-11-02 23:21:59,355 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=15363, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=16870, PETRI_PLACES=507, PETRI_TRANSITIONS=439} [2021-11-02 23:21:59,355 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 441 predicate places. [2021-11-02 23:21:59,355 INFO L470 AbstractCegarLoop]: Abstraction has has 507 places, 439 transitions, 16870 flow [2021-11-02 23:21:59,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:59,356 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:21:59,356 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:59,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-11-02 23:21:59,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:59,577 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:21:59,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:59,577 INFO L85 PathProgramCache]: Analyzing trace with hash -2069429262, now seen corresponding path program 45 times [2021-11-02 23:21:59,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:59,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523426281] [2021-11-02 23:21:59,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:59,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:59,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:59,812 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:21:59,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:59,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523426281] [2021-11-02 23:21:59,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523426281] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:59,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385043471] [2021-11-02 23:21:59,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:21:59,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:59,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:21:59,816 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:21:59,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-02 23:22:01,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-02 23:22:01,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:22:01,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-02 23:22:01,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:22:02,354 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:22:02,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385043471] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:02,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:22:02,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-11-02 23:22:02,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083567558] [2021-11-02 23:22:02,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:22:02,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:22:02,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:22:02,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:22:02,357 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:22:02,358 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 439 transitions, 16870 flow. Second operand has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:02,358 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:22:02,358 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:22:02,358 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:22:03,955 INFO L129 PetriNetUnfolder]: 355/2597 cut-off events. [2021-11-02 23:22:03,955 INFO L130 PetriNetUnfolder]: For 385940/386506 co-relation queries the response was YES. [2021-11-02 23:22:04,009 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24196 conditions, 2597 events. 355/2597 cut-off events. For 385940/386506 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 23649 event pairs, 0 based on Foata normal form. 118/2437 useless extension candidates. Maximal degree in co-relation 23953. Up to 473 conditions per place. [2021-11-02 23:22:04,035 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 207 selfloop transitions, 213 changer transitions 8/472 dead transitions. [2021-11-02 23:22:04,035 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 472 transitions, 20996 flow [2021-11-02 23:22:04,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-02 23:22:04,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-11-02 23:22:04,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1665 transitions. [2021-11-02 23:22:04,042 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8409090909090909 [2021-11-02 23:22:04,042 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1665 transitions. [2021-11-02 23:22:04,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1665 transitions. [2021-11-02 23:22:04,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:22:04,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1665 transitions. [2021-11-02 23:22:04,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 55.5) internal successors, (1665), 30 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:04,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:04,048 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:04,048 INFO L186 Difference]: Start difference. First operand has 507 places, 439 transitions, 16870 flow. Second operand 30 states and 1665 transitions. [2021-11-02 23:22:04,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 472 transitions, 20996 flow [2021-11-02 23:22:05,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 472 transitions, 20489 flow, removed 176 selfloop flow, removed 22 redundant places. [2021-11-02 23:22:06,010 INFO L242 Difference]: Finished difference. Result has 516 places, 441 transitions, 17142 flow [2021-11-02 23:22:06,011 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=16455, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=17142, PETRI_PLACES=516, PETRI_TRANSITIONS=441} [2021-11-02 23:22:06,011 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 450 predicate places. [2021-11-02 23:22:06,011 INFO L470 AbstractCegarLoop]: Abstraction has has 516 places, 441 transitions, 17142 flow [2021-11-02 23:22:06,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:06,011 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:22:06,012 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:22:06,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-02 23:22:06,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:22:06,217 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:22:06,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:22:06,217 INFO L85 PathProgramCache]: Analyzing trace with hash 70007892, now seen corresponding path program 46 times [2021-11-02 23:22:06,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:22:06,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140324991] [2021-11-02 23:22:06,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:22:06,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:22:06,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:22:06,395 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:22:06,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:22:06,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140324991] [2021-11-02 23:22:06,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140324991] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:06,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191084099] [2021-11-02 23:22:06,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:22:06,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:22:06,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:22:06,398 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:22:06,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-02 23:22:07,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:22:07,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:22:07,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 23:22:07,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:22:08,283 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:22:08,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191084099] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:08,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:22:08,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-11-02 23:22:08,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631074568] [2021-11-02 23:22:08,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:22:08,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:22:08,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:22:08,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:22:08,286 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:22:08,286 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 441 transitions, 17142 flow. Second operand has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:08,286 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:22:08,286 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:22:08,286 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:22:10,125 INFO L129 PetriNetUnfolder]: 357/2622 cut-off events. [2021-11-02 23:22:10,125 INFO L130 PetriNetUnfolder]: For 392658/393170 co-relation queries the response was YES. [2021-11-02 23:22:10,184 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24618 conditions, 2622 events. 357/2622 cut-off events. For 392658/393170 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 23933 event pairs, 0 based on Foata normal form. 140/2481 useless extension candidates. Maximal degree in co-relation 24376. Up to 475 conditions per place. [2021-11-02 23:22:10,211 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 154 selfloop transitions, 269 changer transitions 8/475 dead transitions. [2021-11-02 23:22:10,211 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 475 transitions, 21511 flow [2021-11-02 23:22:10,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-02 23:22:10,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-11-02 23:22:10,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1777 transitions. [2021-11-02 23:22:10,221 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8413825757575758 [2021-11-02 23:22:10,221 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1777 transitions. [2021-11-02 23:22:10,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1777 transitions. [2021-11-02 23:22:10,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:22:10,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1777 transitions. [2021-11-02 23:22:10,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.53125) internal successors, (1777), 32 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:10,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 66.0) internal successors, (2178), 33 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:10,228 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 66.0) internal successors, (2178), 33 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:10,228 INFO L186 Difference]: Start difference. First operand has 516 places, 441 transitions, 17142 flow. Second operand 32 states and 1777 transitions. [2021-11-02 23:22:10,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 475 transitions, 21511 flow [2021-11-02 23:22:11,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 475 transitions, 20882 flow, removed 148 selfloop flow, removed 27 redundant places. [2021-11-02 23:22:11,894 INFO L242 Difference]: Finished difference. Result has 522 places, 443 transitions, 17491 flow [2021-11-02 23:22:11,895 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=16679, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=17491, PETRI_PLACES=522, PETRI_TRANSITIONS=443} [2021-11-02 23:22:11,895 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 456 predicate places. [2021-11-02 23:22:11,895 INFO L470 AbstractCegarLoop]: Abstraction has has 522 places, 443 transitions, 17491 flow [2021-11-02 23:22:11,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.05555555555556) internal successors, (973), 18 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:11,895 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:22:11,896 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:22:11,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-11-02 23:22:12,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-11-02 23:22:12,096 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:22:12,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:22:12,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1740345410, now seen corresponding path program 47 times [2021-11-02 23:22:12,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:22:12,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946177675] [2021-11-02 23:22:12,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:22:12,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:22:12,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:22:12,288 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:22:12,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:22:12,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946177675] [2021-11-02 23:22:12,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946177675] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:12,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881252386] [2021-11-02 23:22:12,289 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:22:12,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:22:12,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:22:12,290 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:22:12,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-02 23:22:13,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-02 23:22:13,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:22:13,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 23:22:13,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:22:14,245 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:22:14,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881252386] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:14,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:22:14,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-02 23:22:14,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698694608] [2021-11-02 23:22:14,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 23:22:14,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:22:14,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 23:22:14,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:22:14,248 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:22:14,248 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 443 transitions, 17491 flow. Second operand has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:14,248 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:22:14,248 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:22:14,249 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:22:15,939 INFO L129 PetriNetUnfolder]: 363/2662 cut-off events. [2021-11-02 23:22:15,939 INFO L130 PetriNetUnfolder]: For 392948/393514 co-relation queries the response was YES. [2021-11-02 23:22:15,999 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25090 conditions, 2662 events. 363/2662 cut-off events. For 392948/393514 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 24364 event pairs, 0 based on Foata normal form. 169/2548 useless extension candidates. Maximal degree in co-relation 24848. Up to 487 conditions per place. [2021-11-02 23:22:16,027 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 103 selfloop transitions, 329 changer transitions 8/484 dead transitions. [2021-11-02 23:22:16,027 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 484 transitions, 22454 flow [2021-11-02 23:22:16,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-02 23:22:16,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-11-02 23:22:16,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1945 transitions. [2021-11-02 23:22:16,029 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.841991341991342 [2021-11-02 23:22:16,029 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1945 transitions. [2021-11-02 23:22:16,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1945 transitions. [2021-11-02 23:22:16,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:22:16,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1945 transitions. [2021-11-02 23:22:16,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 55.57142857142857) internal successors, (1945), 35 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:16,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 66.0) internal successors, (2376), 36 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:16,033 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 66.0) internal successors, (2376), 36 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:16,033 INFO L186 Difference]: Start difference. First operand has 522 places, 443 transitions, 17491 flow. Second operand 35 states and 1945 transitions. [2021-11-02 23:22:16,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 484 transitions, 22454 flow [2021-11-02 23:22:17,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 484 transitions, 21758 flow, removed 139 selfloop flow, removed 27 redundant places. [2021-11-02 23:22:17,695 INFO L242 Difference]: Finished difference. Result has 532 places, 450 transitions, 18217 flow [2021-11-02 23:22:17,695 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=16943, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=18217, PETRI_PLACES=532, PETRI_TRANSITIONS=450} [2021-11-02 23:22:17,696 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 466 predicate places. [2021-11-02 23:22:17,696 INFO L470 AbstractCegarLoop]: Abstraction has has 532 places, 450 transitions, 18217 flow [2021-11-02 23:22:17,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:17,696 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:22:17,696 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:22:17,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-11-02 23:22:17,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:22:17,897 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:22:17,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:22:17,897 INFO L85 PathProgramCache]: Analyzing trace with hash -764318568, now seen corresponding path program 48 times [2021-11-02 23:22:17,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:22:17,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791767872] [2021-11-02 23:22:17,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:22:17,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:22:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:22:18,091 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:22:18,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:22:18,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791767872] [2021-11-02 23:22:18,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791767872] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:18,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072930412] [2021-11-02 23:22:18,091 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:22:18,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:22:18,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:22:18,093 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:22:18,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-02 23:22:19,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-02 23:22:19,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:22:19,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 23:22:19,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:22:20,089 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:22:20,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072930412] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:20,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:22:20,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-02 23:22:20,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439535529] [2021-11-02 23:22:20,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 23:22:20,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:22:20,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 23:22:20,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:22:20,091 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:22:20,092 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 450 transitions, 18217 flow. Second operand has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:20,092 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:22:20,092 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:22:20,092 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:22:21,788 INFO L129 PetriNetUnfolder]: 369/2700 cut-off events. [2021-11-02 23:22:21,788 INFO L130 PetriNetUnfolder]: For 409953/410476 co-relation queries the response was YES. [2021-11-02 23:22:21,847 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25842 conditions, 2700 events. 369/2700 cut-off events. For 409953/410476 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 24753 event pairs, 0 based on Foata normal form. 179/2594 useless extension candidates. Maximal degree in co-relation 25597. Up to 496 conditions per place. [2021-11-02 23:22:21,874 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 100 selfloop transitions, 340 changer transitions 8/492 dead transitions. [2021-11-02 23:22:21,874 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 492 transitions, 23411 flow [2021-11-02 23:22:21,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-02 23:22:21,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-02 23:22:21,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2002 transitions. [2021-11-02 23:22:21,876 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8425925925925926 [2021-11-02 23:22:21,876 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2002 transitions. [2021-11-02 23:22:21,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2002 transitions. [2021-11-02 23:22:21,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:22:21,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2002 transitions. [2021-11-02 23:22:21,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.611111111111114) internal successors, (2002), 36 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:21,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:21,880 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:21,880 INFO L186 Difference]: Start difference. First operand has 532 places, 450 transitions, 18217 flow. Second operand 36 states and 2002 transitions. [2021-11-02 23:22:21,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 492 transitions, 23411 flow [2021-11-02 23:22:23,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 492 transitions, 22324 flow, removed 210 selfloop flow, removed 34 redundant places. [2021-11-02 23:22:23,406 INFO L242 Difference]: Finished difference. Result has 537 places, 456 transitions, 18533 flow [2021-11-02 23:22:23,407 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=17248, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=335, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=18533, PETRI_PLACES=537, PETRI_TRANSITIONS=456} [2021-11-02 23:22:23,407 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 471 predicate places. [2021-11-02 23:22:23,407 INFO L470 AbstractCegarLoop]: Abstraction has has 537 places, 456 transitions, 18533 flow [2021-11-02 23:22:23,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.10526315789474) internal successors, (1028), 19 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:23,407 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:22:23,407 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:22:23,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-02 23:22:23,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:22:23,608 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:22:23,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:22:23,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1808341511, now seen corresponding path program 49 times [2021-11-02 23:22:23,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:22:23,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912100651] [2021-11-02 23:22:23,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:22:23,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:22:23,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:22:23,814 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 178 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:22:23,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:22:23,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912100651] [2021-11-02 23:22:23,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912100651] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:23,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64842301] [2021-11-02 23:22:23,815 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:22:23,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:22:23,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:22:23,817 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:22:23,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-02 23:22:25,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:22:25,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 23:22:25,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:22:25,875 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 178 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:22:25,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64842301] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:25,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:22:25,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-02 23:22:25,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965846052] [2021-11-02 23:22:25,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 23:22:25,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:22:25,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 23:22:25,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:22:25,878 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:22:25,878 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 456 transitions, 18533 flow. Second operand has 19 states, 19 states have (on average 54.1578947368421) internal successors, (1029), 19 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:25,878 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:22:25,878 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:22:25,879 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:22:27,660 INFO L129 PetriNetUnfolder]: 370/2716 cut-off events. [2021-11-02 23:22:27,661 INFO L130 PetriNetUnfolder]: For 432826/433316 co-relation queries the response was YES. [2021-11-02 23:22:27,891 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26221 conditions, 2716 events. 370/2716 cut-off events. For 432826/433316 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 25000 event pairs, 0 based on Foata normal form. 175/2602 useless extension candidates. Maximal degree in co-relation 25974. Up to 495 conditions per place. [2021-11-02 23:22:27,918 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 104 selfloop transitions, 341 changer transitions 5/494 dead transitions. [2021-11-02 23:22:27,918 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 494 transitions, 23103 flow [2021-11-02 23:22:27,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 23:22:27,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-11-02 23:22:27,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1723 transitions. [2021-11-02 23:22:27,920 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8421309872922776 [2021-11-02 23:22:27,920 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1723 transitions. [2021-11-02 23:22:27,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1723 transitions. [2021-11-02 23:22:27,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:22:27,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1723 transitions. [2021-11-02 23:22:27,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 55.58064516129032) internal successors, (1723), 31 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:27,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:27,924 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:27,924 INFO L186 Difference]: Start difference. First operand has 537 places, 456 transitions, 18533 flow. Second operand 31 states and 1723 transitions. [2021-11-02 23:22:27,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 494 transitions, 23103 flow [2021-11-02 23:22:29,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 494 transitions, 22110 flow, removed 182 selfloop flow, removed 34 redundant places. [2021-11-02 23:22:29,500 INFO L242 Difference]: Finished difference. Result has 534 places, 459 transitions, 18649 flow [2021-11-02 23:22:29,500 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=17638, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=338, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=18649, PETRI_PLACES=534, PETRI_TRANSITIONS=459} [2021-11-02 23:22:29,500 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 468 predicate places. [2021-11-02 23:22:29,501 INFO L470 AbstractCegarLoop]: Abstraction has has 534 places, 459 transitions, 18649 flow [2021-11-02 23:22:29,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.1578947368421) internal successors, (1029), 19 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:29,501 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:22:29,501 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:22:29,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-11-02 23:22:29,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-02 23:22:29,702 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:22:29,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:22:29,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1943669190, now seen corresponding path program 50 times [2021-11-02 23:22:29,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:22:29,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891942144] [2021-11-02 23:22:29,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:22:29,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:22:29,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:22:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:22:29,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:22:29,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891942144] [2021-11-02 23:22:29,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891942144] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:29,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691167034] [2021-11-02 23:22:29,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:22:29,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:22:29,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:22:29,952 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:22:29,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-02 23:22:31,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:22:31,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:22:31,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 23:22:31,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:22:32,157 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:22:32,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691167034] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:32,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:22:32,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-02 23:22:32,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614818955] [2021-11-02 23:22:32,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 23:22:32,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:22:32,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 23:22:32,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:22:32,161 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:22:32,162 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 459 transitions, 18649 flow. Second operand has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:32,162 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:22:32,162 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:22:32,162 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:22:33,656 INFO L129 PetriNetUnfolder]: 374/2744 cut-off events. [2021-11-02 23:22:33,656 INFO L130 PetriNetUnfolder]: For 432222/432787 co-relation queries the response was YES. [2021-11-02 23:22:33,720 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26410 conditions, 2744 events. 374/2744 cut-off events. For 432222/432787 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 25223 event pairs, 0 based on Foata normal form. 68/2520 useless extension candidates. Maximal degree in co-relation 26165. Up to 602 conditions per place. [2021-11-02 23:22:33,749 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 384 selfloop transitions, 55 changer transitions 8/491 dead transitions. [2021-11-02 23:22:33,749 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 491 transitions, 22505 flow [2021-11-02 23:22:33,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 23:22:33,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-11-02 23:22:33,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1276 transitions. [2021-11-02 23:22:33,750 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8405797101449275 [2021-11-02 23:22:33,750 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1276 transitions. [2021-11-02 23:22:33,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1276 transitions. [2021-11-02 23:22:33,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:22:33,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1276 transitions. [2021-11-02 23:22:33,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 55.47826086956522) internal successors, (1276), 23 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:33,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 66.0) internal successors, (1584), 24 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:33,753 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 66.0) internal successors, (1584), 24 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:33,753 INFO L186 Difference]: Start difference. First operand has 534 places, 459 transitions, 18649 flow. Second operand 23 states and 1276 transitions. [2021-11-02 23:22:33,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 491 transitions, 22505 flow [2021-11-02 23:22:35,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 491 transitions, 21660 flow, removed 112 selfloop flow, removed 26 redundant places. [2021-11-02 23:22:35,447 INFO L242 Difference]: Finished difference. Result has 533 places, 461 transitions, 18236 flow [2021-11-02 23:22:35,448 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=17886, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=18236, PETRI_PLACES=533, PETRI_TRANSITIONS=461} [2021-11-02 23:22:35,448 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 467 predicate places. [2021-11-02 23:22:35,448 INFO L470 AbstractCegarLoop]: Abstraction has has 533 places, 461 transitions, 18236 flow [2021-11-02 23:22:35,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:35,448 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:22:35,448 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:22:35,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-11-02 23:22:35,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-02 23:22:35,649 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:22:35,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:22:35,649 INFO L85 PathProgramCache]: Analyzing trace with hash -966706734, now seen corresponding path program 51 times [2021-11-02 23:22:35,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:22:35,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563742078] [2021-11-02 23:22:35,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:22:35,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:22:35,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:22:35,950 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:22:35,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:22:35,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563742078] [2021-11-02 23:22:35,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563742078] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:35,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287965299] [2021-11-02 23:22:35,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:22:35,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:22:35,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:22:35,952 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:22:35,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-02 23:22:37,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-02 23:22:37,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:22:37,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 23:22:37,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:22:38,464 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:22:38,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287965299] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:38,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:22:38,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-11-02 23:22:38,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415085652] [2021-11-02 23:22:38,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:22:38,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:22:38,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:22:38,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:22:38,468 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:22:38,469 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 461 transitions, 18236 flow. Second operand has 21 states, 21 states have (on average 54.142857142857146) internal successors, (1137), 21 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:38,469 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:22:38,469 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:22:38,469 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:22:39,994 INFO L129 PetriNetUnfolder]: 376/2755 cut-off events. [2021-11-02 23:22:39,994 INFO L130 PetriNetUnfolder]: For 442313/442892 co-relation queries the response was YES. [2021-11-02 23:22:40,057 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26485 conditions, 2755 events. 376/2755 cut-off events. For 442313/442892 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 25152 event pairs, 0 based on Foata normal form. 84/2545 useless extension candidates. Maximal degree in co-relation 26237. Up to 517 conditions per place. [2021-11-02 23:22:40,086 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 336 selfloop transitions, 106 changer transitions 8/494 dead transitions. [2021-11-02 23:22:40,086 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 556 places, 494 transitions, 22228 flow [2021-11-02 23:22:40,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 23:22:40,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-11-02 23:22:40,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1496 transitions. [2021-11-02 23:22:40,088 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8395061728395061 [2021-11-02 23:22:40,088 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1496 transitions. [2021-11-02 23:22:40,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1496 transitions. [2021-11-02 23:22:40,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:22:40,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1496 transitions. [2021-11-02 23:22:40,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 55.407407407407405) internal successors, (1496), 27 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:40,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:40,091 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:40,091 INFO L186 Difference]: Start difference. First operand has 533 places, 461 transitions, 18236 flow. Second operand 27 states and 1496 transitions. [2021-11-02 23:22:40,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 556 places, 494 transitions, 22228 flow [2021-11-02 23:22:41,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 494 transitions, 21876 flow, removed 120 selfloop flow, removed 21 redundant places. [2021-11-02 23:22:42,010 INFO L242 Difference]: Finished difference. Result has 540 places, 463 transitions, 18452 flow [2021-11-02 23:22:42,011 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=17992, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=18452, PETRI_PLACES=540, PETRI_TRANSITIONS=463} [2021-11-02 23:22:42,011 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 474 predicate places. [2021-11-02 23:22:42,011 INFO L470 AbstractCegarLoop]: Abstraction has has 540 places, 463 transitions, 18452 flow [2021-11-02 23:22:42,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.142857142857146) internal successors, (1137), 21 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:42,012 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:22:42,012 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:22:42,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-11-02 23:22:42,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-02 23:22:42,213 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:22:42,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:22:42,213 INFO L85 PathProgramCache]: Analyzing trace with hash -2026492480, now seen corresponding path program 52 times [2021-11-02 23:22:42,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:22:42,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482398612] [2021-11-02 23:22:42,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:22:42,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:22:42,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:22:42,448 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:22:42,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:22:42,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482398612] [2021-11-02 23:22:42,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482398612] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:42,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118628252] [2021-11-02 23:22:42,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:22:42,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:22:42,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:22:42,449 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:22:42,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-02 23:22:44,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:22:44,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:22:44,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 23:22:44,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:22:44,801 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:22:44,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118628252] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:44,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:22:44,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-02 23:22:44,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003578234] [2021-11-02 23:22:44,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 23:22:44,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:22:44,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 23:22:44,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:22:44,803 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:22:44,803 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 463 transitions, 18452 flow. Second operand has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:44,803 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:22:44,804 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:22:44,804 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:22:46,319 INFO L129 PetriNetUnfolder]: 378/2773 cut-off events. [2021-11-02 23:22:46,320 INFO L130 PetriNetUnfolder]: For 448937/449513 co-relation queries the response was YES. [2021-11-02 23:22:46,379 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26792 conditions, 2773 events. 378/2773 cut-off events. For 448937/449513 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 25422 event pairs, 0 based on Foata normal form. 87/2564 useless extension candidates. Maximal degree in co-relation 26542. Up to 509 conditions per place. [2021-11-02 23:22:46,408 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 297 selfloop transitions, 147 changer transitions 8/496 dead transitions. [2021-11-02 23:22:46,408 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 496 transitions, 22560 flow [2021-11-02 23:22:46,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 23:22:46,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-11-02 23:22:46,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1441 transitions. [2021-11-02 23:22:46,409 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8397435897435898 [2021-11-02 23:22:46,409 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1441 transitions. [2021-11-02 23:22:46,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1441 transitions. [2021-11-02 23:22:46,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:22:46,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1441 transitions. [2021-11-02 23:22:46,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 55.42307692307692) internal successors, (1441), 26 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:46,412 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) [2021-11-02 23:22:46,412 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) [2021-11-02 23:22:46,412 INFO L186 Difference]: Start difference. First operand has 540 places, 463 transitions, 18452 flow. Second operand 26 states and 1441 transitions. [2021-11-02 23:22:46,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 496 transitions, 22560 flow [2021-11-02 23:22:48,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 496 transitions, 22120 flow, removed 122 selfloop flow, removed 24 redundant places. [2021-11-02 23:22:48,344 INFO L242 Difference]: Finished difference. Result has 543 places, 465 transitions, 18678 flow [2021-11-02 23:22:48,345 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=18128, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=18678, PETRI_PLACES=543, PETRI_TRANSITIONS=465} [2021-11-02 23:22:48,345 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 477 predicate places. [2021-11-02 23:22:48,346 INFO L470 AbstractCegarLoop]: Abstraction has has 543 places, 465 transitions, 18678 flow [2021-11-02 23:22:48,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:48,346 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:22:48,346 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:22:48,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-11-02 23:22:48,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-11-02 23:22:48,561 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:22:48,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:22:48,561 INFO L85 PathProgramCache]: Analyzing trace with hash 70570994, now seen corresponding path program 53 times [2021-11-02 23:22:48,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:22:48,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518512046] [2021-11-02 23:22:48,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:22:48,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:22:48,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:22:48,833 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:22:48,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:22:48,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518512046] [2021-11-02 23:22:48,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518512046] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:48,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614860731] [2021-11-02 23:22:48,833 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:22:48,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:22:48,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:22:48,835 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:22:48,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-02 23:22:50,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-02 23:22:50,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:22:50,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 23:22:50,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:22:51,271 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 4 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:22:51,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614860731] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:51,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:22:51,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-11-02 23:22:51,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142346890] [2021-11-02 23:22:51,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:22:51,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:22:51,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:22:51,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:22:51,273 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:22:51,274 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 543 places, 465 transitions, 18678 flow. Second operand has 21 states, 21 states have (on average 54.142857142857146) internal successors, (1137), 21 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:51,274 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:22:51,274 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:22:51,274 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:22:53,144 INFO L129 PetriNetUnfolder]: 382/2816 cut-off events. [2021-11-02 23:22:53,145 INFO L130 PetriNetUnfolder]: For 454682/455220 co-relation queries the response was YES. [2021-11-02 23:22:53,190 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27240 conditions, 2816 events. 382/2816 cut-off events. For 454682/455220 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 25850 event pairs, 0 based on Foata normal form. 103/2618 useless extension candidates. Maximal degree in co-relation 26988. Up to 517 conditions per place. [2021-11-02 23:22:53,218 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 258 selfloop transitions, 191 changer transitions 8/501 dead transitions. [2021-11-02 23:22:53,218 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 501 transitions, 23037 flow [2021-11-02 23:22:53,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 23:22:53,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-11-02 23:22:53,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1608 transitions. [2021-11-02 23:22:53,219 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8401253918495298 [2021-11-02 23:22:53,219 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1608 transitions. [2021-11-02 23:22:53,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1608 transitions. [2021-11-02 23:22:53,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:22:53,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1608 transitions. [2021-11-02 23:22:53,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.44827586206897) internal successors, (1608), 29 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:53,222 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) [2021-11-02 23:22:53,223 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) [2021-11-02 23:22:53,223 INFO L186 Difference]: Start difference. First operand has 543 places, 465 transitions, 18678 flow. Second operand 29 states and 1608 transitions. [2021-11-02 23:22:53,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 501 transitions, 23037 flow [2021-11-02 23:22:54,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 501 transitions, 22519 flow, removed 124 selfloop flow, removed 23 redundant places. [2021-11-02 23:22:54,915 INFO L242 Difference]: Finished difference. Result has 550 places, 469 transitions, 19065 flow [2021-11-02 23:22:54,916 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=18280, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=19065, PETRI_PLACES=550, PETRI_TRANSITIONS=469} [2021-11-02 23:22:54,916 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 484 predicate places. [2021-11-02 23:22:54,916 INFO L470 AbstractCegarLoop]: Abstraction has has 550 places, 469 transitions, 19065 flow [2021-11-02 23:22:54,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.142857142857146) internal successors, (1137), 21 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:54,917 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:22:54,917 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:22:54,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-11-02 23:22:55,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:22:55,117 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:22:55,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:22:55,118 INFO L85 PathProgramCache]: Analyzing trace with hash -105470152, now seen corresponding path program 54 times [2021-11-02 23:22:55,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:22:55,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617280527] [2021-11-02 23:22:55,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:22:55,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:22:55,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:22:55,332 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:22:55,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:22:55,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617280527] [2021-11-02 23:22:55,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617280527] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:55,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743538424] [2021-11-02 23:22:55,333 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:22:55,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:22:55,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:22:55,335 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:22:55,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-02 23:22:57,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-02 23:22:57,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:22:57,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-02 23:22:57,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:22:57,600 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:22:57,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743538424] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:57,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:22:57,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-02 23:22:57,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627841371] [2021-11-02 23:22:57,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 23:22:57,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:22:57,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 23:22:57,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:22:57,603 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:22:57,604 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 469 transitions, 19065 flow. Second operand has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:57,604 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:22:57,604 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:22:57,604 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:22:59,217 INFO L129 PetriNetUnfolder]: 384/2827 cut-off events. [2021-11-02 23:22:59,217 INFO L130 PetriNetUnfolder]: For 457149/457725 co-relation queries the response was YES. [2021-11-02 23:22:59,285 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27490 conditions, 2827 events. 384/2827 cut-off events. For 457149/457725 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 25897 event pairs, 0 based on Foata normal form. 159/2684 useless extension candidates. Maximal degree in co-relation 27236. Up to 521 conditions per place. [2021-11-02 23:22:59,314 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 123 selfloop transitions, 333 changer transitions 8/508 dead transitions. [2021-11-02 23:22:59,314 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 578 places, 508 transitions, 23857 flow [2021-11-02 23:22:59,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-02 23:22:59,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-11-02 23:22:59,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1777 transitions. [2021-11-02 23:22:59,316 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8413825757575758 [2021-11-02 23:22:59,316 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1777 transitions. [2021-11-02 23:22:59,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1777 transitions. [2021-11-02 23:22:59,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:22:59,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1777 transitions. [2021-11-02 23:22:59,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.53125) internal successors, (1777), 32 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:59,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 66.0) internal successors, (2178), 33 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:59,321 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 66.0) internal successors, (2178), 33 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:22:59,321 INFO L186 Difference]: Start difference. First operand has 550 places, 469 transitions, 19065 flow. Second operand 32 states and 1777 transitions. [2021-11-02 23:22:59,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 578 places, 508 transitions, 23857 flow [2021-11-02 23:23:01,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 508 transitions, 23231 flow, removed 138 selfloop flow, removed 26 redundant places. [2021-11-02 23:23:01,256 INFO L242 Difference]: Finished difference. Result has 557 places, 471 transitions, 19528 flow [2021-11-02 23:23:01,257 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=18579, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=331, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=19528, PETRI_PLACES=557, PETRI_TRANSITIONS=471} [2021-11-02 23:23:01,257 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 491 predicate places. [2021-11-02 23:23:01,257 INFO L470 AbstractCegarLoop]: Abstraction has has 557 places, 471 transitions, 19528 flow [2021-11-02 23:23:01,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:01,258 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:23:01,258 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:23:01,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-11-02 23:23:01,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:23:01,459 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:23:01,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:23:01,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1230669308, now seen corresponding path program 55 times [2021-11-02 23:23:01,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:23:01,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697895649] [2021-11-02 23:23:01,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:23:01,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:23:01,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:23:01,687 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:23:01,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:23:01,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697895649] [2021-11-02 23:23:01,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697895649] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:23:01,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373921779] [2021-11-02 23:23:01,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:23:01,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:23:01,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:23:01,689 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:23:01,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-02 23:23:03,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:23:03,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 23:23:03,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:23:04,027 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:23:04,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373921779] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:23:04,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:23:04,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-02 23:23:04,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538694833] [2021-11-02 23:23:04,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 23:23:04,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:23:04,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 23:23:04,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:23:04,032 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:23:04,033 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 471 transitions, 19528 flow. Second operand has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:04,033 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:23:04,033 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:23:04,033 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:23:05,872 INFO L129 PetriNetUnfolder]: 390/2888 cut-off events. [2021-11-02 23:23:05,872 INFO L130 PetriNetUnfolder]: For 466834/467372 co-relation queries the response was YES. [2021-11-02 23:23:05,943 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28229 conditions, 2888 events. 390/2888 cut-off events. For 466834/467372 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 26557 event pairs, 0 based on Foata normal form. 163/2743 useless extension candidates. Maximal degree in co-relation 27973. Up to 533 conditions per place. [2021-11-02 23:23:05,973 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 109 selfloop transitions, 356 changer transitions 8/517 dead transitions. [2021-11-02 23:23:05,973 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 587 places, 517 transitions, 24900 flow [2021-11-02 23:23:05,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-02 23:23:05,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-02 23:23:05,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1889 transitions. [2021-11-02 23:23:05,975 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8418003565062389 [2021-11-02 23:23:05,975 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1889 transitions. [2021-11-02 23:23:05,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1889 transitions. [2021-11-02 23:23:05,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:23:05,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1889 transitions. [2021-11-02 23:23:05,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 55.55882352941177) internal successors, (1889), 34 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:05,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:05,979 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:05,979 INFO L186 Difference]: Start difference. First operand has 557 places, 471 transitions, 19528 flow. Second operand 34 states and 1889 transitions. [2021-11-02 23:23:05,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 587 places, 517 transitions, 24900 flow [2021-11-02 23:23:08,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 517 transitions, 24069 flow, removed 146 selfloop flow, removed 27 redundant places. [2021-11-02 23:23:08,122 INFO L242 Difference]: Finished difference. Result has 567 places, 478 transitions, 20239 flow [2021-11-02 23:23:08,122 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=18849, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=349, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=20239, PETRI_PLACES=567, PETRI_TRANSITIONS=478} [2021-11-02 23:23:08,123 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 501 predicate places. [2021-11-02 23:23:08,123 INFO L470 AbstractCegarLoop]: Abstraction has has 567 places, 478 transitions, 20239 flow [2021-11-02 23:23:08,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:08,123 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:23:08,123 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:23:08,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-11-02 23:23:08,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-11-02 23:23:08,324 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:23:08,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:23:08,325 INFO L85 PathProgramCache]: Analyzing trace with hash 529183286, now seen corresponding path program 56 times [2021-11-02 23:23:08,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:23:08,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458858958] [2021-11-02 23:23:08,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:23:08,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:23:08,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:23:08,532 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:23:08,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:23:08,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458858958] [2021-11-02 23:23:08,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458858958] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:23:08,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187191384] [2021-11-02 23:23:08,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:23:08,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:23:08,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:23:08,534 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:23:08,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-02 23:23:10,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:23:10,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:23:10,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 23:23:10,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:23:11,058 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:23:11,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187191384] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:23:11,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:23:11,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-11-02 23:23:11,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170907478] [2021-11-02 23:23:11,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:23:11,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:23:11,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:23:11,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:23:11,060 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:23:11,061 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 567 places, 478 transitions, 20239 flow. Second operand has 21 states, 21 states have (on average 54.142857142857146) internal successors, (1137), 21 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:11,061 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:23:11,061 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:23:11,061 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:23:13,102 INFO L129 PetriNetUnfolder]: 393/2901 cut-off events. [2021-11-02 23:23:13,102 INFO L130 PetriNetUnfolder]: For 480836/481439 co-relation queries the response was YES. [2021-11-02 23:23:13,153 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28736 conditions, 2901 events. 393/2901 cut-off events. For 480836/481439 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 26720 event pairs, 0 based on Foata normal form. 182/2775 useless extension candidates. Maximal degree in co-relation 28476. Up to 539 conditions per place. [2021-11-02 23:23:13,295 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 88 selfloop transitions, 382 changer transitions 8/522 dead transitions. [2021-11-02 23:23:13,295 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 600 places, 522 transitions, 25587 flow [2021-11-02 23:23:13,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-02 23:23:13,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-11-02 23:23:13,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2056 transitions. [2021-11-02 23:23:13,297 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8419328419328419 [2021-11-02 23:23:13,297 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2056 transitions. [2021-11-02 23:23:13,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2056 transitions. [2021-11-02 23:23:13,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:23:13,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2056 transitions. [2021-11-02 23:23:13,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 55.567567567567565) internal successors, (2056), 37 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:13,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 66.0) internal successors, (2508), 38 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:13,301 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 66.0) internal successors, (2508), 38 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:13,301 INFO L186 Difference]: Start difference. First operand has 567 places, 478 transitions, 20239 flow. Second operand 37 states and 2056 transitions. [2021-11-02 23:23:13,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 600 places, 522 transitions, 25587 flow [2021-11-02 23:23:15,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 571 places, 522 transitions, 24569 flow, removed 203 selfloop flow, removed 29 redundant places. [2021-11-02 23:23:15,298 INFO L242 Difference]: Finished difference. Result has 577 places, 483 transitions, 20598 flow [2021-11-02 23:23:15,298 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=19339, PETRI_DIFFERENCE_MINUEND_PLACES=535, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=377, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=20598, PETRI_PLACES=577, PETRI_TRANSITIONS=483} [2021-11-02 23:23:15,298 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 511 predicate places. [2021-11-02 23:23:15,299 INFO L470 AbstractCegarLoop]: Abstraction has has 577 places, 483 transitions, 20598 flow [2021-11-02 23:23:15,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.142857142857146) internal successors, (1137), 21 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:15,299 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:23:15,299 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:23:15,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-11-02 23:23:15,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:23:15,509 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:23:15,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:23:15,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1170663302, now seen corresponding path program 57 times [2021-11-02 23:23:15,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:23:15,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547460494] [2021-11-02 23:23:15,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:23:15,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:23:15,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:23:15,692 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:23:15,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:23:15,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547460494] [2021-11-02 23:23:15,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547460494] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:23:15,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636542938] [2021-11-02 23:23:15,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:23:15,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:23:15,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:23:15,694 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:23:15,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-02 23:23:17,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-02 23:23:17,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:23:17,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 23:23:17,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:23:18,085 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:23:18,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636542938] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:23:18,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:23:18,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-02 23:23:18,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627655965] [2021-11-02 23:23:18,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 23:23:18,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:23:18,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 23:23:18,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:23:18,087 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:23:18,088 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 577 places, 483 transitions, 20598 flow. Second operand has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:18,088 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:23:18,088 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:23:18,088 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:23:20,165 INFO L129 PetriNetUnfolder]: 410/2994 cut-off events. [2021-11-02 23:23:20,165 INFO L130 PetriNetUnfolder]: For 524186/524844 co-relation queries the response was YES. [2021-11-02 23:23:20,221 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30473 conditions, 2994 events. 410/2994 cut-off events. For 524186/524844 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 27537 event pairs, 0 based on Foata normal form. 188/2866 useless extension candidates. Maximal degree in co-relation 30210. Up to 562 conditions per place. [2021-11-02 23:23:20,254 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 96 selfloop transitions, 387 changer transitions 8/535 dead transitions. [2021-11-02 23:23:20,254 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 609 places, 535 transitions, 26594 flow [2021-11-02 23:23:20,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-02 23:23:20,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-02 23:23:20,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2005 transitions. [2021-11-02 23:23:20,256 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8438552188552189 [2021-11-02 23:23:20,256 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2005 transitions. [2021-11-02 23:23:20,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2005 transitions. [2021-11-02 23:23:20,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:23:20,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2005 transitions. [2021-11-02 23:23:20,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.69444444444444) internal successors, (2005), 36 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:20,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:20,260 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:20,260 INFO L186 Difference]: Start difference. First operand has 577 places, 483 transitions, 20598 flow. Second operand 36 states and 2005 transitions. [2021-11-02 23:23:20,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 609 places, 535 transitions, 26594 flow [2021-11-02 23:23:22,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 579 places, 535 transitions, 25574 flow, removed 233 selfloop flow, removed 30 redundant places. [2021-11-02 23:23:22,476 INFO L242 Difference]: Finished difference. Result has 586 places, 491 transitions, 21353 flow [2021-11-02 23:23:22,477 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=19764, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=379, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=21353, PETRI_PLACES=586, PETRI_TRANSITIONS=491} [2021-11-02 23:23:22,477 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 520 predicate places. [2021-11-02 23:23:22,477 INFO L470 AbstractCegarLoop]: Abstraction has has 586 places, 491 transitions, 21353 flow [2021-11-02 23:23:22,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:22,478 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:23:22,478 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:23:22,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-11-02 23:23:22,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:23:22,693 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:23:22,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:23:22,693 INFO L85 PathProgramCache]: Analyzing trace with hash 707029866, now seen corresponding path program 58 times [2021-11-02 23:23:22,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:23:22,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480594472] [2021-11-02 23:23:22,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:23:22,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:23:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:23:22,898 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:23:22,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:23:22,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480594472] [2021-11-02 23:23:22,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480594472] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:23:22,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976385362] [2021-11-02 23:23:22,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:23:22,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:23:22,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:23:22,901 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:23:22,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-02 23:23:25,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:23:25,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:23:25,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 23:23:25,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:23:25,318 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:23:25,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976385362] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:23:25,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:23:25,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-02 23:23:25,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858007926] [2021-11-02 23:23:25,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 23:23:25,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:23:25,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 23:23:25,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:23:25,322 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:23:25,323 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 586 places, 491 transitions, 21353 flow. Second operand has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:25,323 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:23:25,323 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:23:25,323 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:23:27,550 INFO L129 PetriNetUnfolder]: 405/2979 cut-off events. [2021-11-02 23:23:27,551 INFO L130 PetriNetUnfolder]: For 546270/546989 co-relation queries the response was YES. [2021-11-02 23:23:27,606 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30726 conditions, 2979 events. 405/2979 cut-off events. For 546270/546989 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 27465 event pairs, 0 based on Foata normal form. 201/2865 useless extension candidates. Maximal degree in co-relation 30459. Up to 557 conditions per place. [2021-11-02 23:23:27,642 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 89 selfloop transitions, 394 changer transitions 11/538 dead transitions. [2021-11-02 23:23:27,642 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 620 places, 538 transitions, 27364 flow [2021-11-02 23:23:27,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-02 23:23:27,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-11-02 23:23:27,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2113 transitions. [2021-11-02 23:23:27,644 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8425039872408293 [2021-11-02 23:23:27,645 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2113 transitions. [2021-11-02 23:23:27,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2113 transitions. [2021-11-02 23:23:27,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:23:27,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2113 transitions. [2021-11-02 23:23:27,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 55.60526315789474) internal successors, (2113), 38 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:27,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 66.0) internal successors, (2574), 39 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:27,652 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 66.0) internal successors, (2574), 39 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:27,652 INFO L186 Difference]: Start difference. First operand has 586 places, 491 transitions, 21353 flow. Second operand 38 states and 2113 transitions. [2021-11-02 23:23:27,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 620 places, 538 transitions, 27364 flow [2021-11-02 23:23:30,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 589 places, 538 transitions, 25956 flow, removed 364 selfloop flow, removed 31 redundant places. [2021-11-02 23:23:30,269 INFO L242 Difference]: Finished difference. Result has 595 places, 494 transitions, 21483 flow [2021-11-02 23:23:30,269 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=20307, PETRI_DIFFERENCE_MINUEND_PLACES=552, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=391, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=21483, PETRI_PLACES=595, PETRI_TRANSITIONS=494} [2021-11-02 23:23:30,269 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 529 predicate places. [2021-11-02 23:23:30,269 INFO L470 AbstractCegarLoop]: Abstraction has has 595 places, 494 transitions, 21483 flow [2021-11-02 23:23:30,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.1) internal successors, (1082), 20 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:30,270 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:23:30,270 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:23:30,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-11-02 23:23:30,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-11-02 23:23:30,473 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:23:30,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:23:30,473 INFO L85 PathProgramCache]: Analyzing trace with hash 269427497, now seen corresponding path program 59 times [2021-11-02 23:23:30,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:23:30,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527954500] [2021-11-02 23:23:30,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:23:30,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:23:30,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:23:30,814 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:23:30,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:23:30,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527954500] [2021-11-02 23:23:30,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527954500] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:23:30,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47480498] [2021-11-02 23:23:30,815 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:23:30,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:23:30,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:23:30,818 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:23:30,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-02 23:23:32,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-02 23:23:32,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:23:32,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 23:23:32,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:23:33,392 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:23:33,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47480498] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:23:33,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:23:33,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-02 23:23:33,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945042531] [2021-11-02 23:23:33,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:23:33,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:23:33,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:23:33,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:23:33,394 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:23:33,395 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 595 places, 494 transitions, 21483 flow. Second operand has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:33,396 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:23:33,396 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:23:33,396 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:23:35,234 INFO L129 PetriNetUnfolder]: 405/2979 cut-off events. [2021-11-02 23:23:35,234 INFO L130 PetriNetUnfolder]: For 534102/534748 co-relation queries the response was YES. [2021-11-02 23:23:35,286 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30497 conditions, 2979 events. 405/2979 cut-off events. For 534102/534748 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 27461 event pairs, 0 based on Foata normal form. 76/2738 useless extension candidates. Maximal degree in co-relation 30227. Up to 709 conditions per place. [2021-11-02 23:23:35,315 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 442 selfloop transitions, 29 changer transitions 8/523 dead transitions. [2021-11-02 23:23:35,315 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 523 transitions, 25575 flow [2021-11-02 23:23:35,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 23:23:35,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-11-02 23:23:35,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1275 transitions. [2021-11-02 23:23:35,316 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8399209486166008 [2021-11-02 23:23:35,317 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1275 transitions. [2021-11-02 23:23:35,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1275 transitions. [2021-11-02 23:23:35,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:23:35,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1275 transitions. [2021-11-02 23:23:35,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 55.43478260869565) internal successors, (1275), 23 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:35,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 66.0) internal successors, (1584), 24 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:35,319 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 66.0) internal successors, (1584), 24 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:35,319 INFO L186 Difference]: Start difference. First operand has 595 places, 494 transitions, 21483 flow. Second operand 23 states and 1275 transitions. [2021-11-02 23:23:35,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 523 transitions, 25575 flow [2021-11-02 23:23:37,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 579 places, 523 transitions, 24553 flow, removed 141 selfloop flow, removed 35 redundant places. [2021-11-02 23:23:37,962 INFO L242 Difference]: Finished difference. Result has 584 places, 496 transitions, 20799 flow [2021-11-02 23:23:37,962 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=20487, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=20799, PETRI_PLACES=584, PETRI_TRANSITIONS=496} [2021-11-02 23:23:37,963 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 518 predicate places. [2021-11-02 23:23:37,963 INFO L470 AbstractCegarLoop]: Abstraction has has 584 places, 496 transitions, 20799 flow [2021-11-02 23:23:37,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:37,963 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:23:37,963 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:23:37,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-11-02 23:23:38,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-11-02 23:23:38,164 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:23:38,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:23:38,165 INFO L85 PathProgramCache]: Analyzing trace with hash -378950563, now seen corresponding path program 60 times [2021-11-02 23:23:38,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:23:38,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835379929] [2021-11-02 23:23:38,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:23:38,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:23:38,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:23:38,462 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:23:38,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:23:38,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835379929] [2021-11-02 23:23:38,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835379929] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:23:38,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618084262] [2021-11-02 23:23:38,463 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:23:38,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:23:38,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:23:38,464 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:23:38,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-02 23:23:40,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-02 23:23:40,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:23:40,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 23:23:40,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:23:41,160 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:23:41,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618084262] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:23:41,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:23:41,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-02 23:23:41,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175482157] [2021-11-02 23:23:41,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:23:41,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:23:41,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:23:41,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:23:41,162 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:23:41,163 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 584 places, 496 transitions, 20799 flow. Second operand has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:41,163 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:23:41,163 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:23:41,163 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:23:42,899 INFO L129 PetriNetUnfolder]: 407/3004 cut-off events. [2021-11-02 23:23:42,899 INFO L130 PetriNetUnfolder]: For 560529/561144 co-relation queries the response was YES. [2021-11-02 23:23:42,958 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30738 conditions, 3004 events. 407/3004 cut-off events. For 560529/561144 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 27612 event pairs, 0 based on Foata normal form. 80/2764 useless extension candidates. Maximal degree in co-relation 30467. Up to 632 conditions per place. [2021-11-02 23:23:42,987 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 403 selfloop transitions, 72 changer transitions 8/527 dead transitions. [2021-11-02 23:23:42,988 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 607 places, 527 transitions, 25221 flow [2021-11-02 23:23:42,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 23:23:42,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-11-02 23:23:42,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1498 transitions. [2021-11-02 23:23:42,989 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8406285072951739 [2021-11-02 23:23:42,989 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1498 transitions. [2021-11-02 23:23:42,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1498 transitions. [2021-11-02 23:23:42,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:23:42,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1498 transitions. [2021-11-02 23:23:42,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 55.48148148148148) internal successors, (1498), 27 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:42,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:43,145 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:43,145 INFO L186 Difference]: Start difference. First operand has 584 places, 496 transitions, 20799 flow. Second operand 27 states and 1498 transitions. [2021-11-02 23:23:43,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 607 places, 527 transitions, 25221 flow [2021-11-02 23:23:45,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 587 places, 527 transitions, 24863 flow, removed 152 selfloop flow, removed 20 redundant places. [2021-11-02 23:23:45,923 INFO L242 Difference]: Finished difference. Result has 592 places, 498 transitions, 20990 flow [2021-11-02 23:23:45,924 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=20589, PETRI_DIFFERENCE_MINUEND_PLACES=561, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=20990, PETRI_PLACES=592, PETRI_TRANSITIONS=498} [2021-11-02 23:23:45,924 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 526 predicate places. [2021-11-02 23:23:45,924 INFO L470 AbstractCegarLoop]: Abstraction has has 592 places, 498 transitions, 20990 flow [2021-11-02 23:23:45,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:45,925 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:23:45,925 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:23:45,956 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-11-02 23:23:46,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-11-02 23:23:46,129 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:23:46,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:23:46,129 INFO L85 PathProgramCache]: Analyzing trace with hash 210161853, now seen corresponding path program 61 times [2021-11-02 23:23:46,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:23:46,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215976223] [2021-11-02 23:23:46,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:23:46,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:23:46,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:23:46,367 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:23:46,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:23:46,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215976223] [2021-11-02 23:23:46,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215976223] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:23:46,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796565525] [2021-11-02 23:23:46,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:23:46,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:23:46,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:23:46,368 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:23:46,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-02 23:23:48,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:23:48,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 23:23:48,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:23:49,115 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:23:49,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796565525] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:23:49,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:23:49,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-02 23:23:49,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509248813] [2021-11-02 23:23:49,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:23:49,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:23:49,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:23:49,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:23:49,117 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:23:49,118 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 498 transitions, 20990 flow. Second operand has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:49,118 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:23:49,118 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:23:49,118 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:23:51,076 INFO L129 PetriNetUnfolder]: 411/3033 cut-off events. [2021-11-02 23:23:51,076 INFO L130 PetriNetUnfolder]: For 560793/561443 co-relation queries the response was YES. [2021-11-02 23:23:51,130 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31073 conditions, 3033 events. 411/3033 cut-off events. For 560793/561443 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 27887 event pairs, 0 based on Foata normal form. 90/2800 useless extension candidates. Maximal degree in co-relation 30800. Up to 565 conditions per place. [2021-11-02 23:23:51,161 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 342 selfloop transitions, 141 changer transitions 8/535 dead transitions. [2021-11-02 23:23:51,161 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 618 places, 535 transitions, 25811 flow [2021-11-02 23:23:51,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-02 23:23:51,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-11-02 23:23:51,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1663 transitions. [2021-11-02 23:23:51,163 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8398989898989899 [2021-11-02 23:23:51,163 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1663 transitions. [2021-11-02 23:23:51,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1663 transitions. [2021-11-02 23:23:51,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:23:51,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1663 transitions. [2021-11-02 23:23:51,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 55.43333333333333) internal successors, (1663), 30 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:51,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:51,166 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:51,166 INFO L186 Difference]: Start difference. First operand has 592 places, 498 transitions, 20990 flow. Second operand 30 states and 1663 transitions. [2021-11-02 23:23:51,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 618 places, 535 transitions, 25811 flow [2021-11-02 23:23:54,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 594 places, 535 transitions, 25408 flow, removed 134 selfloop flow, removed 24 redundant places. [2021-11-02 23:23:54,235 INFO L242 Difference]: Finished difference. Result has 601 places, 502 transitions, 21448 flow [2021-11-02 23:23:54,235 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=20711, PETRI_DIFFERENCE_MINUEND_PLACES=565, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=21448, PETRI_PLACES=601, PETRI_TRANSITIONS=502} [2021-11-02 23:23:54,235 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 535 predicate places. [2021-11-02 23:23:54,236 INFO L470 AbstractCegarLoop]: Abstraction has has 601 places, 502 transitions, 21448 flow [2021-11-02 23:23:54,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:54,236 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:23:54,236 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:23:54,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-11-02 23:23:54,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:23:54,441 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:23:54,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:23:54,441 INFO L85 PathProgramCache]: Analyzing trace with hash -2080562621, now seen corresponding path program 62 times [2021-11-02 23:23:54,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:23:54,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644425898] [2021-11-02 23:23:54,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:23:54,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:23:54,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:23:54,680 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:23:54,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:23:54,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644425898] [2021-11-02 23:23:54,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644425898] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:23:54,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901691569] [2021-11-02 23:23:54,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:23:54,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:23:54,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:23:54,682 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:23:54,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-11-02 23:23:57,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:23:57,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:23:57,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 23:23:57,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:23:57,437 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:23:57,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901691569] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:23:57,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:23:57,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-02 23:23:57,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906442732] [2021-11-02 23:23:57,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:23:57,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:23:57,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:23:57,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:23:57,440 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:23:57,441 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 601 places, 502 transitions, 21448 flow. Second operand has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:57,441 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:23:57,441 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:23:57,442 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:23:59,631 INFO L129 PetriNetUnfolder]: 413/3058 cut-off events. [2021-11-02 23:23:59,631 INFO L130 PetriNetUnfolder]: For 564968/565578 co-relation queries the response was YES. [2021-11-02 23:23:59,690 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31369 conditions, 3058 events. 413/3058 cut-off events. For 564968/565578 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 28143 event pairs, 0 based on Foata normal form. 124/2856 useless extension candidates. Maximal degree in co-relation 31091. Up to 569 conditions per place. [2021-11-02 23:23:59,724 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 254 selfloop transitions, 231 changer transitions 8/537 dead transitions. [2021-11-02 23:23:59,724 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 629 places, 537 transitions, 26334 flow [2021-11-02 23:23:59,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-02 23:23:59,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-11-02 23:23:59,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1775 transitions. [2021-11-02 23:23:59,726 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8404356060606061 [2021-11-02 23:23:59,726 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1775 transitions. [2021-11-02 23:23:59,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1775 transitions. [2021-11-02 23:23:59,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:23:59,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1775 transitions. [2021-11-02 23:23:59,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.46875) internal successors, (1775), 32 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:59,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 66.0) internal successors, (2178), 33 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:59,729 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 66.0) internal successors, (2178), 33 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:59,730 INFO L186 Difference]: Start difference. First operand has 601 places, 502 transitions, 21448 flow. Second operand 32 states and 1775 transitions. [2021-11-02 23:23:59,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 629 places, 537 transitions, 26334 flow [2021-11-02 23:24:03,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 604 places, 537 transitions, 25819 flow, removed 138 selfloop flow, removed 25 redundant places. [2021-11-02 23:24:03,243 INFO L242 Difference]: Finished difference. Result has 609 places, 504 transitions, 21806 flow [2021-11-02 23:24:03,243 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=21065, PETRI_DIFFERENCE_MINUEND_PLACES=573, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=21806, PETRI_PLACES=609, PETRI_TRANSITIONS=504} [2021-11-02 23:24:03,243 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 543 predicate places. [2021-11-02 23:24:03,244 INFO L470 AbstractCegarLoop]: Abstraction has has 609 places, 504 transitions, 21806 flow [2021-11-02 23:24:03,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.095238095238095) internal successors, (1136), 21 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:03,244 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:24:03,244 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:24:03,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-11-02 23:24:03,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:24:03,449 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:24:03,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:24:03,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1092886429, now seen corresponding path program 63 times [2021-11-02 23:24:03,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:24:03,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954992372] [2021-11-02 23:24:03,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:24:03,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:24:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:24:03,779 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:24:03,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:24:03,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954992372] [2021-11-02 23:24:03,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954992372] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:24:03,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382343567] [2021-11-02 23:24:03,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:24:03,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:24:03,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:24:03,781 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:24:03,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-11-02 23:24:06,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-02 23:24:06,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:24:06,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-02 23:24:06,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:24:06,705 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:24:06,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382343567] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:24:06,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:24:06,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-11-02 23:24:06,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261210762] [2021-11-02 23:24:06,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 23:24:06,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:24:06,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 23:24:06,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:24:06,708 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:24:06,709 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 609 places, 504 transitions, 21806 flow. Second operand has 22 states, 22 states have (on average 54.13636363636363) internal successors, (1191), 22 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:06,709 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:24:06,710 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:24:06,710 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:24:09,162 INFO L129 PetriNetUnfolder]: 419/3098 cut-off events. [2021-11-02 23:24:09,162 INFO L130 PetriNetUnfolder]: For 576900/577552 co-relation queries the response was YES. [2021-11-02 23:24:09,234 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32055 conditions, 3098 events. 419/3098 cut-off events. For 576900/577552 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 28582 event pairs, 0 based on Foata normal form. 188/2957 useless extension candidates. Maximal degree in co-relation 31775. Up to 581 conditions per place. [2021-11-02 23:24:09,270 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 123 selfloop transitions, 375 changer transitions 8/550 dead transitions. [2021-11-02 23:24:09,270 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 644 places, 550 transitions, 27873 flow [2021-11-02 23:24:09,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-02 23:24:09,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-11-02 23:24:09,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2167 transitions. [2021-11-02 23:24:09,272 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8418803418803419 [2021-11-02 23:24:09,272 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2167 transitions. [2021-11-02 23:24:09,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2167 transitions. [2021-11-02 23:24:09,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:24:09,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2167 transitions. [2021-11-02 23:24:09,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 55.56410256410256) internal successors, (2167), 39 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:09,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 66.0) internal successors, (2640), 40 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:09,277 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 66.0) internal successors, (2640), 40 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:09,277 INFO L186 Difference]: Start difference. First operand has 609 places, 504 transitions, 21806 flow. Second operand 39 states and 2167 transitions. [2021-11-02 23:24:09,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 644 places, 550 transitions, 27873 flow [2021-11-02 23:24:12,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 550 transitions, 27130 flow, removed 156 selfloop flow, removed 29 redundant places. [2021-11-02 23:24:12,625 INFO L242 Difference]: Finished difference. Result has 621 places, 511 transitions, 22628 flow [2021-11-02 23:24:12,626 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=21227, PETRI_DIFFERENCE_MINUEND_PLACES=577, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=368, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=22628, PETRI_PLACES=621, PETRI_TRANSITIONS=511} [2021-11-02 23:24:12,626 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 555 predicate places. [2021-11-02 23:24:12,626 INFO L470 AbstractCegarLoop]: Abstraction has has 621 places, 511 transitions, 22628 flow [2021-11-02 23:24:12,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.13636363636363) internal successors, (1191), 22 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:12,627 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:24:12,627 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:24:12,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-11-02 23:24:12,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:24:12,837 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:24:12,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:24:12,837 INFO L85 PathProgramCache]: Analyzing trace with hash -610622169, now seen corresponding path program 64 times [2021-11-02 23:24:12,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:24:12,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218138638] [2021-11-02 23:24:12,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:24:12,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:24:12,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:24:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:24:13,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:24:13,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218138638] [2021-11-02 23:24:13,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218138638] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:24:13,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732641670] [2021-11-02 23:24:13,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:24:13,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:24:13,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:24:13,079 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:24:13,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-11-02 23:24:15,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:24:15,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:24:15,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 23:24:15,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:24:16,047 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:24:16,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732641670] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:24:16,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:24:16,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-11-02 23:24:16,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679150544] [2021-11-02 23:24:16,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 23:24:16,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:24:16,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 23:24:16,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:24:16,051 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:24:16,052 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 511 transitions, 22628 flow. Second operand has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:16,052 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:24:16,052 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:24:16,053 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:24:18,774 INFO L129 PetriNetUnfolder]: 431/3167 cut-off events. [2021-11-02 23:24:18,775 INFO L130 PetriNetUnfolder]: For 609123/609794 co-relation queries the response was YES. [2021-11-02 23:24:18,847 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33519 conditions, 3167 events. 431/3167 cut-off events. For 609123/609794 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 29232 event pairs, 0 based on Foata normal form. 200/3031 useless extension candidates. Maximal degree in co-relation 33236. Up to 599 conditions per place. [2021-11-02 23:24:18,883 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 114 selfloop transitions, 396 changer transitions 14/568 dead transitions. [2021-11-02 23:24:18,883 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 661 places, 568 transitions, 30134 flow [2021-11-02 23:24:18,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-02 23:24:18,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-11-02 23:24:18,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2448 transitions. [2021-11-02 23:24:18,885 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8429752066115702 [2021-11-02 23:24:18,885 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2448 transitions. [2021-11-02 23:24:18,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2448 transitions. [2021-11-02 23:24:18,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:24:18,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2448 transitions. [2021-11-02 23:24:18,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 55.63636363636363) internal successors, (2448), 44 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:18,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 66.0) internal successors, (2970), 45 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:18,894 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 66.0) internal successors, (2970), 45 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:18,894 INFO L186 Difference]: Start difference. First operand has 621 places, 511 transitions, 22628 flow. Second operand 44 states and 2448 transitions. [2021-11-02 23:24:18,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 661 places, 568 transitions, 30134 flow [2021-11-02 23:24:22,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 628 places, 568 transitions, 29002 flow, removed 254 selfloop flow, removed 33 redundant places. [2021-11-02 23:24:22,323 INFO L242 Difference]: Finished difference. Result has 639 places, 521 transitions, 23598 flow [2021-11-02 23:24:22,324 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=21654, PETRI_DIFFERENCE_MINUEND_PLACES=585, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=387, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=23598, PETRI_PLACES=639, PETRI_TRANSITIONS=521} [2021-11-02 23:24:22,324 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 573 predicate places. [2021-11-02 23:24:22,324 INFO L470 AbstractCegarLoop]: Abstraction has has 639 places, 521 transitions, 23598 flow [2021-11-02 23:24:22,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:22,324 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:24:22,324 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:24:22,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-11-02 23:24:22,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:24:22,525 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:24:22,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:24:22,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1582560447, now seen corresponding path program 65 times [2021-11-02 23:24:22,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:24:22,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127981225] [2021-11-02 23:24:22,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:24:22,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:24:22,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:24:22,897 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:24:22,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:24:22,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127981225] [2021-11-02 23:24:22,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127981225] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:24:22,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128030840] [2021-11-02 23:24:22,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:24:22,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:24:22,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:24:22,900 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:24:22,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-11-02 23:24:25,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-02 23:24:25,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:24:25,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 23:24:25,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:24:26,003 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:24:26,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128030840] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:24:26,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:24:26,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-02 23:24:26,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630548121] [2021-11-02 23:24:26,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 23:24:26,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:24:26,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 23:24:26,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:24:26,006 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:24:26,006 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 639 places, 521 transitions, 23598 flow. Second operand has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:26,006 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:24:26,006 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:24:26,006 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:24:28,224 INFO L129 PetriNetUnfolder]: 429/3172 cut-off events. [2021-11-02 23:24:28,224 INFO L130 PetriNetUnfolder]: For 706019/706706 co-relation queries the response was YES. [2021-11-02 23:24:28,294 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34869 conditions, 3172 events. 429/3172 cut-off events. For 706019/706706 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 29168 event pairs, 0 based on Foata normal form. 73/2908 useless extension candidates. Maximal degree in co-relation 34578. Up to 700 conditions per place. [2021-11-02 23:24:28,333 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 444 selfloop transitions, 59 changer transitions 8/555 dead transitions. [2021-11-02 23:24:28,333 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 658 places, 555 transitions, 28370 flow [2021-11-02 23:24:28,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-02 23:24:28,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-11-02 23:24:28,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1386 transitions. [2021-11-02 23:24:28,335 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.84 [2021-11-02 23:24:28,335 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1386 transitions. [2021-11-02 23:24:28,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1386 transitions. [2021-11-02 23:24:28,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:24:28,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1386 transitions. [2021-11-02 23:24:28,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 55.44) internal successors, (1386), 25 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) [2021-11-02 23:24:28,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:28,338 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:28,338 INFO L186 Difference]: Start difference. First operand has 639 places, 521 transitions, 23598 flow. Second operand 25 states and 1386 transitions. [2021-11-02 23:24:28,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 658 places, 555 transitions, 28370 flow [2021-11-02 23:24:33,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 623 places, 555 transitions, 26744 flow, removed 480 selfloop flow, removed 35 redundant places. [2021-11-02 23:24:33,218 INFO L242 Difference]: Finished difference. Result has 628 places, 523 transitions, 22530 flow [2021-11-02 23:24:33,219 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=22138, PETRI_DIFFERENCE_MINUEND_PLACES=599, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=22530, PETRI_PLACES=628, PETRI_TRANSITIONS=523} [2021-11-02 23:24:33,220 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 562 predicate places. [2021-11-02 23:24:33,220 INFO L470 AbstractCegarLoop]: Abstraction has has 628 places, 523 transitions, 22530 flow [2021-11-02 23:24:33,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:33,221 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:24:33,221 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:24:33,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-11-02 23:24:33,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:24:33,449 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:24:33,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:24:33,449 INFO L85 PathProgramCache]: Analyzing trace with hash -250190041, now seen corresponding path program 66 times [2021-11-02 23:24:33,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:24:33,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391871923] [2021-11-02 23:24:33,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:24:33,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:24:33,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:24:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:24:33,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:24:33,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391871923] [2021-11-02 23:24:33,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391871923] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:24:33,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802535515] [2021-11-02 23:24:33,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:24:33,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:24:33,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:24:33,829 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:24:33,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-11-02 23:24:36,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-02 23:24:36,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:24:36,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 23:24:36,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:24:37,533 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 1 proven. 237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:24:37,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802535515] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:24:37,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:24:37,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-11-02 23:24:37,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722530521] [2021-11-02 23:24:37,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 23:24:37,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:24:37,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 23:24:37,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:24:37,537 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:24:37,538 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 628 places, 523 transitions, 22530 flow. Second operand has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:37,538 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:24:37,539 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:24:37,539 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:24:39,856 INFO L129 PetriNetUnfolder]: 433/3201 cut-off events. [2021-11-02 23:24:39,856 INFO L130 PetriNetUnfolder]: For 684105/684793 co-relation queries the response was YES. [2021-11-02 23:24:40,387 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34403 conditions, 3201 events. 433/3201 cut-off events. For 684105/684793 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 29552 event pairs, 0 based on Foata normal form. 89/2950 useless extension candidates. Maximal degree in co-relation 34111. Up to 611 conditions per place. [2021-11-02 23:24:40,497 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 394 selfloop transitions, 114 changer transitions 8/560 dead transitions. [2021-11-02 23:24:40,497 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 653 places, 560 transitions, 27521 flow [2021-11-02 23:24:40,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 23:24:40,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-11-02 23:24:40,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1606 transitions. [2021-11-02 23:24:40,499 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8390804597701149 [2021-11-02 23:24:40,500 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1606 transitions. [2021-11-02 23:24:40,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1606 transitions. [2021-11-02 23:24:40,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:24:40,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1606 transitions. [2021-11-02 23:24:40,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.37931034482759) internal successors, (1606), 29 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:40,505 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) [2021-11-02 23:24:40,506 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) [2021-11-02 23:24:40,506 INFO L186 Difference]: Start difference. First operand has 628 places, 523 transitions, 22530 flow. Second operand 29 states and 1606 transitions. [2021-11-02 23:24:40,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 653 places, 560 transitions, 27521 flow [2021-11-02 23:24:44,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 631 places, 560 transitions, 27065 flow, removed 173 selfloop flow, removed 22 redundant places. [2021-11-02 23:24:44,542 INFO L242 Difference]: Finished difference. Result has 636 places, 527 transitions, 22899 flow [2021-11-02 23:24:44,543 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=22254, PETRI_DIFFERENCE_MINUEND_PLACES=603, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=22899, PETRI_PLACES=636, PETRI_TRANSITIONS=527} [2021-11-02 23:24:44,543 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 570 predicate places. [2021-11-02 23:24:44,543 INFO L470 AbstractCegarLoop]: Abstraction has has 636 places, 527 transitions, 22899 flow [2021-11-02 23:24:44,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:44,543 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:24:44,544 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:24:44,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-11-02 23:24:44,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:24:44,745 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:24:44,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:24:44,745 INFO L85 PathProgramCache]: Analyzing trace with hash 139987649, now seen corresponding path program 67 times [2021-11-02 23:24:44,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:24:44,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626822852] [2021-11-02 23:24:44,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:24:44,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:24:44,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:24:45,041 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:24:45,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:24:45,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626822852] [2021-11-02 23:24:45,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626822852] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:24:45,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91763918] [2021-11-02 23:24:45,042 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:24:45,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:24:45,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:24:45,043 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:24:45,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-11-02 23:24:48,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:24:48,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 23:24:48,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:24:48,601 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:24:48,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91763918] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:24:48,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:24:48,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-02 23:24:48,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820858227] [2021-11-02 23:24:48,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 23:24:48,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:24:48,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 23:24:48,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:24:48,604 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:24:48,605 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 636 places, 527 transitions, 22899 flow. Second operand has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:48,605 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:24:48,605 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:24:48,605 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:24:50,928 INFO L129 PetriNetUnfolder]: 435/3219 cut-off events. [2021-11-02 23:24:50,928 INFO L130 PetriNetUnfolder]: For 671970/672648 co-relation queries the response was YES. [2021-11-02 23:24:51,018 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34426 conditions, 3219 events. 435/3219 cut-off events. For 671970/672648 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 29721 event pairs, 0 based on Foata normal form. 92/2969 useless extension candidates. Maximal degree in co-relation 34132. Up to 602 conditions per place. [2021-11-02 23:24:51,057 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 351 selfloop transitions, 159 changer transitions 8/562 dead transitions. [2021-11-02 23:24:51,057 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 660 places, 562 transitions, 27819 flow [2021-11-02 23:24:51,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 23:24:51,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-11-02 23:24:51,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1551 transitions. [2021-11-02 23:24:51,059 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8392857142857143 [2021-11-02 23:24:51,059 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1551 transitions. [2021-11-02 23:24:51,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1551 transitions. [2021-11-02 23:24:51,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:24:51,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1551 transitions. [2021-11-02 23:24:51,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 55.392857142857146) internal successors, (1551), 28 states have internal predecessors, (1551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:51,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 66.0) internal successors, (1914), 29 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:51,062 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 66.0) internal successors, (1914), 29 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:51,063 INFO L186 Difference]: Start difference. First operand has 636 places, 527 transitions, 22899 flow. Second operand 28 states and 1551 transitions. [2021-11-02 23:24:51,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 660 places, 562 transitions, 27819 flow [2021-11-02 23:24:54,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 636 places, 562 transitions, 27359 flow, removed 137 selfloop flow, removed 24 redundant places. [2021-11-02 23:24:54,628 INFO L242 Difference]: Finished difference. Result has 641 places, 529 transitions, 23167 flow [2021-11-02 23:24:54,629 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=22563, PETRI_DIFFERENCE_MINUEND_PLACES=609, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=23167, PETRI_PLACES=641, PETRI_TRANSITIONS=529} [2021-11-02 23:24:54,629 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 575 predicate places. [2021-11-02 23:24:54,629 INFO L470 AbstractCegarLoop]: Abstraction has has 641 places, 529 transitions, 23167 flow [2021-11-02 23:24:54,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:54,630 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:24:54,630 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:24:54,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-11-02 23:24:54,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-11-02 23:24:54,831 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:24:54,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:24:54,831 INFO L85 PathProgramCache]: Analyzing trace with hash -103007459, now seen corresponding path program 68 times [2021-11-02 23:24:54,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:24:54,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770197170] [2021-11-02 23:24:54,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:24:54,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:24:54,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:24:55,153 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:24:55,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:24:55,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770197170] [2021-11-02 23:24:55,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770197170] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:24:55,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843572973] [2021-11-02 23:24:55,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:24:55,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:24:55,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:24:55,155 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:24:55,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-11-02 23:24:58,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:24:58,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:24:58,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 23:24:58,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:24:58,795 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:24:58,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843572973] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:24:58,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:24:58,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-11-02 23:24:58,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742777994] [2021-11-02 23:24:58,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 23:24:58,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:24:58,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 23:24:58,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:24:58,798 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:24:58,799 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 641 places, 529 transitions, 23167 flow. Second operand has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:58,799 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:24:58,799 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:24:58,799 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:25:01,395 INFO L129 PetriNetUnfolder]: 439/3262 cut-off events. [2021-11-02 23:25:01,395 INFO L130 PetriNetUnfolder]: For 680484/681118 co-relation queries the response was YES. [2021-11-02 23:25:01,477 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34924 conditions, 3262 events. 439/3262 cut-off events. For 680484/681118 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 30124 event pairs, 0 based on Foata normal form. 108/3023 useless extension candidates. Maximal degree in co-relation 34628. Up to 610 conditions per place. [2021-11-02 23:25:01,515 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 308 selfloop transitions, 207 changer transitions 8/567 dead transitions. [2021-11-02 23:25:01,515 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 668 places, 567 transitions, 28354 flow [2021-11-02 23:25:01,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 23:25:01,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-11-02 23:25:01,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1718 transitions. [2021-11-02 23:25:01,517 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8396871945259042 [2021-11-02 23:25:01,517 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1718 transitions. [2021-11-02 23:25:01,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1718 transitions. [2021-11-02 23:25:01,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:25:01,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1718 transitions. [2021-11-02 23:25:01,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 55.41935483870968) internal successors, (1718), 31 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:01,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:01,520 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:01,521 INFO L186 Difference]: Start difference. First operand has 641 places, 529 transitions, 23167 flow. Second operand 31 states and 1718 transitions. [2021-11-02 23:25:01,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 668 places, 567 transitions, 28354 flow [2021-11-02 23:25:05,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 643 places, 567 transitions, 27790 flow, removed 137 selfloop flow, removed 25 redundant places. [2021-11-02 23:25:05,584 INFO L242 Difference]: Finished difference. Result has 648 places, 533 transitions, 23576 flow [2021-11-02 23:25:05,585 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=22731, PETRI_DIFFERENCE_MINUEND_PLACES=613, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=23576, PETRI_PLACES=648, PETRI_TRANSITIONS=533} [2021-11-02 23:25:05,585 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 582 predicate places. [2021-11-02 23:25:05,585 INFO L470 AbstractCegarLoop]: Abstraction has has 648 places, 533 transitions, 23576 flow [2021-11-02 23:25:05,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:05,585 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:25:05,586 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:25:05,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-11-02 23:25:05,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-11-02 23:25:05,786 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:25:05,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:25:05,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1699183541, now seen corresponding path program 69 times [2021-11-02 23:25:05,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:25:05,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624755941] [2021-11-02 23:25:05,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:25:05,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:25:05,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:25:06,151 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:25:06,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:25:06,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624755941] [2021-11-02 23:25:06,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624755941] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:25:06,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349540094] [2021-11-02 23:25:06,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:25:06,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:25:06,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:25:06,154 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:25:06,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-11-02 23:25:09,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-02 23:25:09,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:25:09,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-02 23:25:09,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:25:10,129 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:25:10,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349540094] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:25:10,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:25:10,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-02 23:25:10,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426353944] [2021-11-02 23:25:10,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 23:25:10,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:25:10,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 23:25:10,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:25:10,132 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:25:10,133 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 648 places, 533 transitions, 23576 flow. Second operand has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:10,133 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:25:10,133 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:25:10,133 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:25:12,864 INFO L129 PetriNetUnfolder]: 443/3298 cut-off events. [2021-11-02 23:25:12,865 INFO L130 PetriNetUnfolder]: For 688739/689373 co-relation queries the response was YES. [2021-11-02 23:25:12,944 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35419 conditions, 3298 events. 443/3298 cut-off events. For 688739/689373 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 30519 event pairs, 0 based on Foata normal form. 111/3058 useless extension candidates. Maximal degree in co-relation 35121. Up to 618 conditions per place. [2021-11-02 23:25:12,984 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 275 selfloop transitions, 246 changer transitions 8/573 dead transitions. [2021-11-02 23:25:12,984 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 674 places, 573 transitions, 28908 flow [2021-11-02 23:25:12,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-02 23:25:12,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-11-02 23:25:12,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1663 transitions. [2021-11-02 23:25:12,986 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8398989898989899 [2021-11-02 23:25:12,986 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1663 transitions. [2021-11-02 23:25:12,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1663 transitions. [2021-11-02 23:25:12,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:25:12,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1663 transitions. [2021-11-02 23:25:12,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 55.43333333333333) internal successors, (1663), 30 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:12,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:12,993 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:12,993 INFO L186 Difference]: Start difference. First operand has 648 places, 533 transitions, 23576 flow. Second operand 30 states and 1663 transitions. [2021-11-02 23:25:12,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 674 places, 573 transitions, 28908 flow [2021-11-02 23:25:17,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 645 places, 573 transitions, 28228 flow, removed 143 selfloop flow, removed 29 redundant places. [2021-11-02 23:25:17,214 INFO L242 Difference]: Finished difference. Result has 652 places, 537 transitions, 23999 flow [2021-11-02 23:25:17,215 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=23028, PETRI_DIFFERENCE_MINUEND_PLACES=616, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=23999, PETRI_PLACES=652, PETRI_TRANSITIONS=537} [2021-11-02 23:25:17,215 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 586 predicate places. [2021-11-02 23:25:17,215 INFO L470 AbstractCegarLoop]: Abstraction has has 652 places, 537 transitions, 23999 flow [2021-11-02 23:25:17,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:17,216 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:25:17,216 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:25:17,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-11-02 23:25:17,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:25:17,417 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:25:17,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:25:17,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1022488053, now seen corresponding path program 70 times [2021-11-02 23:25:17,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:25:17,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595363899] [2021-11-02 23:25:17,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:25:17,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:25:17,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:25:17,741 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:25:17,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:25:17,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595363899] [2021-11-02 23:25:17,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595363899] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:25:17,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358404430] [2021-11-02 23:25:17,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:25:17,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:25:17,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:25:17,743 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:25:17,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-11-02 23:25:21,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:25:21,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:25:21,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 23:25:21,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:25:21,902 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 4 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:25:21,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358404430] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:25:21,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:25:21,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-11-02 23:25:21,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424042730] [2021-11-02 23:25:21,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 23:25:21,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:25:21,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 23:25:21,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:25:21,906 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:25:21,907 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 652 places, 537 transitions, 23999 flow. Second operand has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:21,907 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:25:21,907 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:25:21,907 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:25:24,761 INFO L129 PetriNetUnfolder]: 453/3388 cut-off events. [2021-11-02 23:25:24,761 INFO L130 PetriNetUnfolder]: For 706491/707125 co-relation queries the response was YES. [2021-11-02 23:25:24,840 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36563 conditions, 3388 events. 453/3388 cut-off events. For 706491/707125 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 31653 event pairs, 0 based on Foata normal form. 157/3184 useless extension candidates. Maximal degree in co-relation 36261. Up to 638 conditions per place. [2021-11-02 23:25:24,880 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 185 selfloop transitions, 348 changer transitions 8/585 dead transitions. [2021-11-02 23:25:24,880 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 683 places, 585 transitions, 30133 flow [2021-11-02 23:25:24,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-02 23:25:24,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-11-02 23:25:24,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1942 transitions. [2021-11-02 23:25:24,882 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8406926406926407 [2021-11-02 23:25:24,882 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1942 transitions. [2021-11-02 23:25:24,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1942 transitions. [2021-11-02 23:25:24,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:25:24,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1942 transitions. [2021-11-02 23:25:24,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 55.48571428571429) internal successors, (1942), 35 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:24,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 66.0) internal successors, (2376), 36 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:24,886 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 66.0) internal successors, (2376), 36 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:24,886 INFO L186 Difference]: Start difference. First operand has 652 places, 537 transitions, 23999 flow. Second operand 35 states and 1942 transitions. [2021-11-02 23:25:24,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 683 places, 585 transitions, 30133 flow [2021-11-02 23:25:29,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 658 places, 585 transitions, 29427 flow, removed 147 selfloop flow, removed 25 redundant places. [2021-11-02 23:25:29,628 INFO L242 Difference]: Finished difference. Result has 667 places, 547 transitions, 25131 flow [2021-11-02 23:25:29,629 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=23437, PETRI_DIFFERENCE_MINUEND_PLACES=624, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=338, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=25131, PETRI_PLACES=667, PETRI_TRANSITIONS=547} [2021-11-02 23:25:29,629 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 601 predicate places. [2021-11-02 23:25:29,629 INFO L470 AbstractCegarLoop]: Abstraction has has 667 places, 547 transitions, 25131 flow [2021-11-02 23:25:29,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:29,629 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:25:29,629 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:25:29,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-11-02 23:25:29,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:25:29,830 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:25:29,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:25:29,830 INFO L85 PathProgramCache]: Analyzing trace with hash 716694435, now seen corresponding path program 71 times [2021-11-02 23:25:29,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:25:29,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878467850] [2021-11-02 23:25:29,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:25:29,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:25:29,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:25:30,163 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:25:30,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:25:30,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878467850] [2021-11-02 23:25:30,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878467850] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:25:30,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618169261] [2021-11-02 23:25:30,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:25:30,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:25:30,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:25:30,165 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:25:30,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-11-02 23:25:33,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-02 23:25:33,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:25:33,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 23:25:33,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:25:33,929 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:25:33,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618169261] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:25:33,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:25:33,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-02 23:25:33,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343190039] [2021-11-02 23:25:33,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 23:25:33,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:25:33,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 23:25:33,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:25:33,932 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:25:33,933 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 667 places, 547 transitions, 25131 flow. Second operand has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:33,934 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:25:33,934 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:25:33,934 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:25:36,739 INFO L129 PetriNetUnfolder]: 457/3417 cut-off events. [2021-11-02 23:25:36,739 INFO L130 PetriNetUnfolder]: For 715933/716603 co-relation queries the response was YES. [2021-11-02 23:25:36,820 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37201 conditions, 3417 events. 457/3417 cut-off events. For 715933/716603 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 31962 event pairs, 0 based on Foata normal form. 157/3210 useless extension candidates. Maximal degree in co-relation 36893. Up to 646 conditions per place. [2021-11-02 23:25:36,861 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 164 selfloop transitions, 373 changer transitions 8/589 dead transitions. [2021-11-02 23:25:36,861 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 697 places, 589 transitions, 30971 flow [2021-11-02 23:25:36,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-02 23:25:36,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-02 23:25:36,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1887 transitions. [2021-11-02 23:25:36,863 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8409090909090909 [2021-11-02 23:25:36,863 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1887 transitions. [2021-11-02 23:25:36,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1887 transitions. [2021-11-02 23:25:36,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:25:36,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1887 transitions. [2021-11-02 23:25:36,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 55.5) internal successors, (1887), 34 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:36,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:36,867 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:36,867 INFO L186 Difference]: Start difference. First operand has 667 places, 547 transitions, 25131 flow. Second operand 34 states and 1887 transitions. [2021-11-02 23:25:36,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 697 places, 589 transitions, 30971 flow [2021-11-02 23:25:42,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 671 places, 589 transitions, 30164 flow, removed 161 selfloop flow, removed 26 redundant places. [2021-11-02 23:25:42,081 INFO L242 Difference]: Finished difference. Result has 676 places, 551 transitions, 25670 flow [2021-11-02 23:25:42,082 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=24472, PETRI_DIFFERENCE_MINUEND_PLACES=638, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=25670, PETRI_PLACES=676, PETRI_TRANSITIONS=551} [2021-11-02 23:25:42,082 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 610 predicate places. [2021-11-02 23:25:42,083 INFO L470 AbstractCegarLoop]: Abstraction has has 676 places, 551 transitions, 25670 flow [2021-11-02 23:25:42,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:42,083 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:25:42,083 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:25:42,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-11-02 23:25:42,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-11-02 23:25:42,297 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:25:42,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:25:42,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1184985541, now seen corresponding path program 72 times [2021-11-02 23:25:42,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:25:42,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608252535] [2021-11-02 23:25:42,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:25:42,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:25:42,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:25:42,561 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:25:42,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:25:42,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608252535] [2021-11-02 23:25:42,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608252535] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:25:42,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020181001] [2021-11-02 23:25:42,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:25:42,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:25:42,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:25:42,563 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:25:42,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-11-02 23:25:45,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-02 23:25:45,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:25:45,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-02 23:25:45,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:25:46,278 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:25:46,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020181001] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:25:46,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:25:46,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-02 23:25:46,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377443230] [2021-11-02 23:25:46,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 23:25:46,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:25:46,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 23:25:46,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:25:46,280 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:25:46,281 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 676 places, 551 transitions, 25670 flow. Second operand has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:46,281 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:25:46,281 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:25:46,281 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:25:49,251 INFO L129 PetriNetUnfolder]: 461/3446 cut-off events. [2021-11-02 23:25:49,251 INFO L130 PetriNetUnfolder]: For 726681/727375 co-relation queries the response was YES. [2021-11-02 23:25:49,339 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37767 conditions, 3446 events. 461/3446 cut-off events. For 726681/727375 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 32214 event pairs, 0 based on Foata normal form. 187/3266 useless extension candidates. Maximal degree in co-relation 37457. Up to 654 conditions per place. [2021-11-02 23:25:49,381 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 112 selfloop transitions, 434 changer transitions 8/598 dead transitions. [2021-11-02 23:25:49,382 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 710 places, 598 transitions, 32041 flow [2021-11-02 23:25:49,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-02 23:25:49,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-11-02 23:25:49,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2111 transitions. [2021-11-02 23:25:49,384 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8417065390749602 [2021-11-02 23:25:49,384 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2111 transitions. [2021-11-02 23:25:49,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2111 transitions. [2021-11-02 23:25:49,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:25:49,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2111 transitions. [2021-11-02 23:25:49,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 55.55263157894737) internal successors, (2111), 38 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:49,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 66.0) internal successors, (2574), 39 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:49,388 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 66.0) internal successors, (2574), 39 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:49,388 INFO L186 Difference]: Start difference. First operand has 676 places, 551 transitions, 25670 flow. Second operand 38 states and 2111 transitions. [2021-11-02 23:25:49,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 710 places, 598 transitions, 32041 flow [2021-11-02 23:25:55,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 679 places, 598 transitions, 31034 flow, removed 161 selfloop flow, removed 31 redundant places. [2021-11-02 23:25:55,159 INFO L242 Difference]: Finished difference. Result has 684 places, 555 transitions, 26163 flow [2021-11-02 23:25:55,160 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=24831, PETRI_DIFFERENCE_MINUEND_PLACES=642, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=430, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=26163, PETRI_PLACES=684, PETRI_TRANSITIONS=555} [2021-11-02 23:25:55,160 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 618 predicate places. [2021-11-02 23:25:55,160 INFO L470 AbstractCegarLoop]: Abstraction has has 684 places, 555 transitions, 26163 flow [2021-11-02 23:25:55,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:55,161 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:25:55,161 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:25:55,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-11-02 23:25:55,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:25:55,362 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:25:55,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:25:55,363 INFO L85 PathProgramCache]: Analyzing trace with hash -2098808585, now seen corresponding path program 73 times [2021-11-02 23:25:55,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:25:55,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732200327] [2021-11-02 23:25:55,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:25:55,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:25:55,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:25:55,600 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:25:55,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:25:55,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732200327] [2021-11-02 23:25:55,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732200327] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:25:55,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027535217] [2021-11-02 23:25:55,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:25:55,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:25:55,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:25:55,602 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:25:55,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-11-02 23:25:58,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:25:58,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 23:25:58,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:25:59,308 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:25:59,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027535217] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:25:59,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:25:59,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-02 23:25:59,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478965655] [2021-11-02 23:25:59,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 23:25:59,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:25:59,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 23:25:59,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:25:59,311 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:25:59,312 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 684 places, 555 transitions, 26163 flow. Second operand has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:25:59,312 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:25:59,312 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:25:59,312 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:26:02,437 INFO L129 PetriNetUnfolder]: 467/3484 cut-off events. [2021-11-02 23:26:02,437 INFO L130 PetriNetUnfolder]: For 738559/739287 co-relation queries the response was YES. [2021-11-02 23:26:02,534 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38406 conditions, 3484 events. 467/3484 cut-off events. For 738559/739287 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 32575 event pairs, 0 based on Foata normal form. 198/3312 useless extension candidates. Maximal degree in co-relation 38094. Up to 664 conditions per place. [2021-11-02 23:26:02,576 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 97 selfloop transitions, 458 changer transitions 8/607 dead transitions. [2021-11-02 23:26:02,576 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 722 places, 607 transitions, 33131 flow [2021-11-02 23:26:02,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-02 23:26:02,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-11-02 23:26:02,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2335 transitions. [2021-11-02 23:26:02,810 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8423520923520924 [2021-11-02 23:26:02,810 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2335 transitions. [2021-11-02 23:26:02,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2335 transitions. [2021-11-02 23:26:02,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:26:02,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2335 transitions. [2021-11-02 23:26:02,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 55.595238095238095) internal successors, (2335), 42 states have internal predecessors, (2335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:02,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 66.0) internal successors, (2838), 43 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:02,817 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 66.0) internal successors, (2838), 43 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:02,818 INFO L186 Difference]: Start difference. First operand has 684 places, 555 transitions, 26163 flow. Second operand 42 states and 2335 transitions. [2021-11-02 23:26:02,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 722 places, 607 transitions, 33131 flow [2021-11-02 23:26:08,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 687 places, 607 transitions, 31998 flow, removed 169 selfloop flow, removed 35 redundant places. [2021-11-02 23:26:08,637 INFO L242 Difference]: Finished difference. Result has 694 places, 561 transitions, 26825 flow [2021-11-02 23:26:08,637 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=25214, PETRI_DIFFERENCE_MINUEND_PLACES=646, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=453, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=26825, PETRI_PLACES=694, PETRI_TRANSITIONS=561} [2021-11-02 23:26:08,638 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 628 predicate places. [2021-11-02 23:26:08,638 INFO L470 AbstractCegarLoop]: Abstraction has has 694 places, 561 transitions, 26825 flow [2021-11-02 23:26:08,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.09090909090909) internal successors, (1190), 22 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:08,638 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:26:08,638 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:26:08,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-11-02 23:26:08,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:26:08,839 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:26:08,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:26:08,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1729112104, now seen corresponding path program 74 times [2021-11-02 23:26:08,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:26:08,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070335712] [2021-11-02 23:26:08,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:26:08,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:26:08,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:26:09,212 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:26:09,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:26:09,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070335712] [2021-11-02 23:26:09,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070335712] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:26:09,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894736588] [2021-11-02 23:26:09,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:26:09,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:26:09,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:26:09,214 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:26:09,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-11-02 23:26:12,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:26:12,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:26:12,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 23:26:12,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:26:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:26:13,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894736588] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:26:13,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:26:13,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-02 23:26:13,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943822758] [2021-11-02 23:26:13,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 23:26:13,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:26:13,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 23:26:13,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:26:13,289 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:26:13,290 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 694 places, 561 transitions, 26825 flow. Second operand has 23 states, 23 states have (on average 54.08695652173913) internal successors, (1244), 23 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:13,290 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:26:13,290 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:26:13,290 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:26:15,952 INFO L129 PetriNetUnfolder]: 469/3509 cut-off events. [2021-11-02 23:26:15,952 INFO L130 PetriNetUnfolder]: For 761491/762137 co-relation queries the response was YES. [2021-11-02 23:26:16,047 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39064 conditions, 3509 events. 469/3509 cut-off events. For 761491/762137 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 32746 event pairs, 0 based on Foata normal form. 73/3207 useless extension candidates. Maximal degree in co-relation 38748. Up to 829 conditions per place. [2021-11-02 23:26:16,091 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 509 selfloop transitions, 31 changer transitions 8/592 dead transitions. [2021-11-02 23:26:16,091 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 715 places, 592 transitions, 31593 flow [2021-11-02 23:26:16,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-02 23:26:16,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-11-02 23:26:16,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1385 transitions. [2021-11-02 23:26:16,092 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8393939393939394 [2021-11-02 23:26:16,092 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1385 transitions. [2021-11-02 23:26:16,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1385 transitions. [2021-11-02 23:26:16,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:26:16,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1385 transitions. [2021-11-02 23:26:16,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 55.4) internal successors, (1385), 25 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:16,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:16,095 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 66.0) internal successors, (1716), 26 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:16,095 INFO L186 Difference]: Start difference. First operand has 694 places, 561 transitions, 26825 flow. Second operand 25 states and 1385 transitions. [2021-11-02 23:26:16,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 715 places, 592 transitions, 31593 flow [2021-11-02 23:26:22,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 680 places, 592 transitions, 30472 flow, removed 192 selfloop flow, removed 35 redundant places. [2021-11-02 23:26:22,406 INFO L242 Difference]: Finished difference. Result has 685 places, 563 transitions, 26094 flow [2021-11-02 23:26:22,407 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=25758, PETRI_DIFFERENCE_MINUEND_PLACES=656, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=26094, PETRI_PLACES=685, PETRI_TRANSITIONS=563} [2021-11-02 23:26:22,407 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 619 predicate places. [2021-11-02 23:26:22,407 INFO L470 AbstractCegarLoop]: Abstraction has has 685 places, 563 transitions, 26094 flow [2021-11-02 23:26:22,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.08695652173913) internal successors, (1244), 23 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:22,407 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:26:22,407 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:26:22,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-11-02 23:26:22,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:26:22,608 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:26:22,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:26:22,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1156150236, now seen corresponding path program 75 times [2021-11-02 23:26:22,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:26:22,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676212669] [2021-11-02 23:26:22,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:26:22,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:26:22,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:26:22,920 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:26:22,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:26:22,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676212669] [2021-11-02 23:26:22,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676212669] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:26:22,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401546920] [2021-11-02 23:26:22,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:26:22,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:26:22,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:26:22,922 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:26:22,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-11-02 23:26:26,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-02 23:26:26,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:26:26,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 23:26:26,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:26:27,157 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:26:27,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401546920] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:26:27,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:26:27,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-02 23:26:27,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060092599] [2021-11-02 23:26:27,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 23:26:27,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:26:27,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 23:26:27,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:26:27,169 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:26:27,170 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 685 places, 563 transitions, 26094 flow. Second operand has 23 states, 23 states have (on average 54.08695652173913) internal successors, (1244), 23 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:27,170 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:26:27,170 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:26:27,170 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:26:30,004 INFO L129 PetriNetUnfolder]: 471/3520 cut-off events. [2021-11-02 23:26:30,005 INFO L130 PetriNetUnfolder]: For 785670/786367 co-relation queries the response was YES. [2021-11-02 23:26:30,113 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39198 conditions, 3520 events. 471/3520 cut-off events. For 785670/786367 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 32888 event pairs, 0 based on Foata normal form. 77/3221 useless extension candidates. Maximal degree in co-relation 38880. Up to 744 conditions per place. [2021-11-02 23:26:30,156 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 466 selfloop transitions, 78 changer transitions 8/596 dead transitions. [2021-11-02 23:26:30,157 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 710 places, 596 transitions, 31192 flow [2021-11-02 23:26:30,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 23:26:30,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-11-02 23:26:30,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1608 transitions. [2021-11-02 23:26:30,158 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8401253918495298 [2021-11-02 23:26:30,158 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1608 transitions. [2021-11-02 23:26:30,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1608 transitions. [2021-11-02 23:26:30,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:26:30,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1608 transitions. [2021-11-02 23:26:30,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.44827586206897) internal successors, (1608), 29 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:30,162 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) [2021-11-02 23:26:30,162 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) [2021-11-02 23:26:30,162 INFO L186 Difference]: Start difference. First operand has 685 places, 563 transitions, 26094 flow. Second operand 29 states and 1608 transitions. [2021-11-02 23:26:30,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 710 places, 596 transitions, 31192 flow [2021-11-02 23:26:36,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 688 places, 596 transitions, 30848 flow, removed 143 selfloop flow, removed 22 redundant places. [2021-11-02 23:26:36,692 INFO L242 Difference]: Finished difference. Result has 693 places, 565 transitions, 26309 flow [2021-11-02 23:26:36,693 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=25874, PETRI_DIFFERENCE_MINUEND_PLACES=660, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=26309, PETRI_PLACES=693, PETRI_TRANSITIONS=565} [2021-11-02 23:26:36,693 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 627 predicate places. [2021-11-02 23:26:36,693 INFO L470 AbstractCegarLoop]: Abstraction has has 693 places, 565 transitions, 26309 flow [2021-11-02 23:26:36,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.08695652173913) internal successors, (1244), 23 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:36,693 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:26:36,693 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:26:36,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-11-02 23:26:36,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:26:36,894 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:26:36,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:26:36,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1976429144, now seen corresponding path program 76 times [2021-11-02 23:26:36,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:26:36,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109241545] [2021-11-02 23:26:36,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:26:36,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:26:36,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:26:37,180 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:26:37,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:26:37,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109241545] [2021-11-02 23:26:37,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109241545] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:26:37,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839488692] [2021-11-02 23:26:37,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:26:37,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:26:37,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:26:37,182 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:26:37,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-11-02 23:26:40,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:26:40,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:26:40,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 23:26:40,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:26:41,286 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:26:41,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839488692] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:26:41,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:26:41,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-02 23:26:41,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666699638] [2021-11-02 23:26:41,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 23:26:41,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:26:41,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 23:26:41,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:26:41,289 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:26:41,289 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 693 places, 565 transitions, 26309 flow. Second operand has 23 states, 23 states have (on average 54.08695652173913) internal successors, (1244), 23 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:41,289 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:26:41,289 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:26:41,289 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:26:44,204 INFO L129 PetriNetUnfolder]: 473/3538 cut-off events. [2021-11-02 23:26:44,205 INFO L130 PetriNetUnfolder]: For 790407/791104 co-relation queries the response was YES. [2021-11-02 23:26:44,304 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39455 conditions, 3538 events. 473/3538 cut-off events. For 790407/791104 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 33085 event pairs, 0 based on Foata normal form. 121/3281 useless extension candidates. Maximal degree in co-relation 39135. Up to 676 conditions per place. [2021-11-02 23:26:44,349 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 303 selfloop transitions, 247 changer transitions 8/602 dead transitions. [2021-11-02 23:26:44,349 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 723 places, 602 transitions, 31939 flow [2021-11-02 23:26:44,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-02 23:26:44,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-02 23:26:44,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1885 transitions. [2021-11-02 23:26:44,351 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8400178253119429 [2021-11-02 23:26:44,351 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1885 transitions. [2021-11-02 23:26:44,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1885 transitions. [2021-11-02 23:26:44,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:26:44,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1885 transitions. [2021-11-02 23:26:44,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 55.44117647058823) internal successors, (1885), 34 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:44,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:44,355 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:44,355 INFO L186 Difference]: Start difference. First operand has 693 places, 565 transitions, 26309 flow. Second operand 34 states and 1885 transitions. [2021-11-02 23:26:44,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 723 places, 602 transitions, 31939 flow [2021-11-02 23:26:51,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 698 places, 602 transitions, 31503 flow, removed 149 selfloop flow, removed 25 redundant places. [2021-11-02 23:26:51,975 INFO L242 Difference]: Finished difference. Result has 703 places, 567 transitions, 26804 flow [2021-11-02 23:26:51,976 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=26013, PETRI_DIFFERENCE_MINUEND_PLACES=665, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=26804, PETRI_PLACES=703, PETRI_TRANSITIONS=567} [2021-11-02 23:26:51,976 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 637 predicate places. [2021-11-02 23:26:51,977 INFO L470 AbstractCegarLoop]: Abstraction has has 703 places, 567 transitions, 26804 flow [2021-11-02 23:26:51,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.08695652173913) internal successors, (1244), 23 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:51,977 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:26:51,977 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:26:52,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-11-02 23:26:52,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:26:52,178 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:26:52,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:26:52,178 INFO L85 PathProgramCache]: Analyzing trace with hash 2030841636, now seen corresponding path program 77 times [2021-11-02 23:26:52,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:26:52,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544454224] [2021-11-02 23:26:52,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:26:52,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:26:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:26:52,573 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:26:52,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:26:52,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544454224] [2021-11-02 23:26:52,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544454224] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:26:52,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131106607] [2021-11-02 23:26:52,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:26:52,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:26:52,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:26:52,576 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:26:52,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-11-02 23:26:56,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-02 23:26:56,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:26:56,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 23:26:56,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:26:56,920 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:26:56,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131106607] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:26:56,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:26:56,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-11-02 23:26:56,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303557772] [2021-11-02 23:26:56,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 23:26:56,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:26:56,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 23:26:56,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:26:56,927 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:26:56,928 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 703 places, 567 transitions, 26804 flow. Second operand has 24 states, 24 states have (on average 54.125) internal successors, (1299), 24 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:26:56,928 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:26:56,928 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:26:56,928 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:27:00,116 INFO L129 PetriNetUnfolder]: 475/3563 cut-off events. [2021-11-02 23:27:00,116 INFO L130 PetriNetUnfolder]: For 796579/797230 co-relation queries the response was YES. [2021-11-02 23:27:00,213 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39857 conditions, 3563 events. 475/3563 cut-off events. For 796579/797230 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 33188 event pairs, 0 based on Foata normal form. 126/3308 useless extension candidates. Maximal degree in co-relation 39534. Up to 680 conditions per place. [2021-11-02 23:27:00,257 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 272 selfloop transitions, 281 changer transitions 8/605 dead transitions. [2021-11-02 23:27:00,257 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 734 places, 605 transitions, 32568 flow [2021-11-02 23:27:00,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-02 23:27:00,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-11-02 23:27:00,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1941 transitions. [2021-11-02 23:27:00,260 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8402597402597403 [2021-11-02 23:27:00,260 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1941 transitions. [2021-11-02 23:27:00,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1941 transitions. [2021-11-02 23:27:00,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:27:00,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1941 transitions. [2021-11-02 23:27:00,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 55.457142857142856) internal successors, (1941), 35 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:00,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 66.0) internal successors, (2376), 36 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:00,264 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 66.0) internal successors, (2376), 36 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:00,264 INFO L186 Difference]: Start difference. First operand has 703 places, 567 transitions, 26804 flow. Second operand 35 states and 1941 transitions. [2021-11-02 23:27:00,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 734 places, 605 transitions, 32568 flow [2021-11-02 23:27:06,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 703 places, 605 transitions, 31822 flow, removed 155 selfloop flow, removed 31 redundant places. [2021-11-02 23:27:06,635 INFO L242 Difference]: Finished difference. Result has 708 places, 569 transitions, 27069 flow [2021-11-02 23:27:06,636 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=26202, PETRI_DIFFERENCE_MINUEND_PLACES=669, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=27069, PETRI_PLACES=708, PETRI_TRANSITIONS=569} [2021-11-02 23:27:06,636 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 642 predicate places. [2021-11-02 23:27:06,636 INFO L470 AbstractCegarLoop]: Abstraction has has 708 places, 569 transitions, 27069 flow [2021-11-02 23:27:06,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.125) internal successors, (1299), 24 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:06,636 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:27:06,636 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:27:06,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-11-02 23:27:06,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-11-02 23:27:06,837 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:27:06,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:27:06,837 INFO L85 PathProgramCache]: Analyzing trace with hash 2124772198, now seen corresponding path program 78 times [2021-11-02 23:27:06,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:27:06,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924904782] [2021-11-02 23:27:06,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:27:06,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:27:06,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:27:07,147 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:27:07,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:27:07,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924904782] [2021-11-02 23:27:07,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924904782] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:27:07,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058806634] [2021-11-02 23:27:07,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:27:07,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:27:07,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:27:07,151 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:27:07,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-11-02 23:27:10,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-11-02 23:27:10,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:27:10,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 23:27:10,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:27:11,442 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:27:11,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058806634] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:27:11,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:27:11,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-11-02 23:27:11,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386868154] [2021-11-02 23:27:11,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 23:27:11,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:27:11,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 23:27:11,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:27:11,446 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:27:11,447 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 708 places, 569 transitions, 27069 flow. Second operand has 24 states, 24 states have (on average 54.125) internal successors, (1299), 24 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:11,447 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:27:11,447 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:27:11,447 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:27:14,733 INFO L129 PetriNetUnfolder]: 479/3599 cut-off events. [2021-11-02 23:27:14,733 INFO L130 PetriNetUnfolder]: For 805045/805696 co-relation queries the response was YES. [2021-11-02 23:27:14,827 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40357 conditions, 3599 events. 479/3599 cut-off events. For 805045/805696 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 33650 event pairs, 0 based on Foata normal form. 175/3389 useless extension candidates. Maximal degree in co-relation 40032. Up to 688 conditions per place. [2021-11-02 23:27:14,871 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 169 selfloop transitions, 390 changer transitions 8/611 dead transitions. [2021-11-02 23:27:14,872 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 743 places, 611 transitions, 33481 flow [2021-11-02 23:27:14,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-02 23:27:14,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-11-02 23:27:14,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2165 transitions. [2021-11-02 23:27:14,874 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8411033411033411 [2021-11-02 23:27:14,874 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2165 transitions. [2021-11-02 23:27:14,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2165 transitions. [2021-11-02 23:27:14,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:27:14,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2165 transitions. [2021-11-02 23:27:14,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 55.51282051282051) internal successors, (2165), 39 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:14,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 66.0) internal successors, (2640), 40 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:14,878 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 66.0) internal successors, (2640), 40 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:14,878 INFO L186 Difference]: Start difference. First operand has 708 places, 569 transitions, 27069 flow. Second operand 39 states and 2165 transitions. [2021-11-02 23:27:14,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 743 places, 611 transitions, 33481 flow [2021-11-02 23:27:19,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 716 places, 611 transitions, 32783 flow, removed 159 selfloop flow, removed 27 redundant places. [2021-11-02 23:27:19,671 INFO L242 Difference]: Finished difference. Result has 723 places, 573 transitions, 27830 flow [2021-11-02 23:27:19,672 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=26531, PETRI_DIFFERENCE_MINUEND_PLACES=678, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=386, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=27830, PETRI_PLACES=723, PETRI_TRANSITIONS=573} [2021-11-02 23:27:19,672 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 657 predicate places. [2021-11-02 23:27:19,673 INFO L470 AbstractCegarLoop]: Abstraction has has 723 places, 573 transitions, 27830 flow [2021-11-02 23:27:19,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.125) internal successors, (1299), 24 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:19,673 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:27:19,673 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:27:19,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-11-02 23:27:19,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:27:19,874 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:27:19,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:27:19,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1666827052, now seen corresponding path program 79 times [2021-11-02 23:27:19,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:27:19,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308178350] [2021-11-02 23:27:19,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:27:19,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:27:19,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:27:20,121 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:27:20,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:27:20,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308178350] [2021-11-02 23:27:20,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308178350] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:27:20,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419007040] [2021-11-02 23:27:20,122 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:27:20,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:27:20,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:27:20,123 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:27:20,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-11-02 23:27:23,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:27:23,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 23:27:23,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:27:24,449 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:27:24,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419007040] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:27:24,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:27:24,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-02 23:27:24,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365761599] [2021-11-02 23:27:24,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 23:27:24,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:27:24,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 23:27:24,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:27:24,452 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:27:24,452 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 723 places, 573 transitions, 27830 flow. Second operand has 23 states, 23 states have (on average 54.08695652173913) internal successors, (1244), 23 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:24,452 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:27:24,453 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:27:24,453 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:27:27,747 INFO L129 PetriNetUnfolder]: 497/3679 cut-off events. [2021-11-02 23:27:27,747 INFO L130 PetriNetUnfolder]: For 839880/840714 co-relation queries the response was YES. [2021-11-02 23:27:27,847 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42213 conditions, 3679 events. 497/3679 cut-off events. For 839880/840714 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 34322 event pairs, 0 based on Foata normal form. 198/3485 useless extension candidates. Maximal degree in co-relation 41884. Up to 714 conditions per place. [2021-11-02 23:27:27,894 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 123 selfloop transitions, 455 changer transitions 8/630 dead transitions. [2021-11-02 23:27:27,895 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 763 places, 630 transitions, 35508 flow [2021-11-02 23:27:27,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-02 23:27:27,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-11-02 23:27:27,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2449 transitions. [2021-11-02 23:27:27,897 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8433195592286501 [2021-11-02 23:27:27,897 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2449 transitions. [2021-11-02 23:27:27,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2449 transitions. [2021-11-02 23:27:27,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:27:27,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2449 transitions. [2021-11-02 23:27:27,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 55.65909090909091) internal successors, (2449), 44 states have internal predecessors, (2449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:27,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 66.0) internal successors, (2970), 45 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:27,902 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 66.0) internal successors, (2970), 45 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:27,902 INFO L186 Difference]: Start difference. First operand has 723 places, 573 transitions, 27830 flow. Second operand 44 states and 2449 transitions. [2021-11-02 23:27:27,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 763 places, 630 transitions, 35508 flow [2021-11-02 23:27:33,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 730 places, 630 transitions, 34474 flow, removed 188 selfloop flow, removed 33 redundant places. [2021-11-02 23:27:33,786 INFO L242 Difference]: Finished difference. Result has 739 places, 583 transitions, 28930 flow [2021-11-02 23:27:33,787 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=27010, PETRI_DIFFERENCE_MINUEND_PLACES=687, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=445, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=28930, PETRI_PLACES=739, PETRI_TRANSITIONS=583} [2021-11-02 23:27:33,787 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 673 predicate places. [2021-11-02 23:27:33,787 INFO L470 AbstractCegarLoop]: Abstraction has has 739 places, 583 transitions, 28930 flow [2021-11-02 23:27:33,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.08695652173913) internal successors, (1244), 23 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:33,787 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:27:33,787 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:27:33,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-11-02 23:27:33,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:27:33,988 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:27:33,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:27:33,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1563567794, now seen corresponding path program 80 times [2021-11-02 23:27:33,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:27:33,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138030368] [2021-11-02 23:27:33,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:27:33,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:27:34,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:27:34,241 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:27:34,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:27:34,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138030368] [2021-11-02 23:27:34,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138030368] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:27:34,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835262826] [2021-11-02 23:27:34,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:27:34,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:27:34,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:27:34,244 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:27:34,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-11-02 23:27:38,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:27:38,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:27:38,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-02 23:27:38,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:27:38,534 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:27:38,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835262826] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:27:38,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:27:38,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-11-02 23:27:38,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681944813] [2021-11-02 23:27:38,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 23:27:38,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:27:38,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 23:27:38,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:27:38,537 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:27:38,538 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 739 places, 583 transitions, 28930 flow. Second operand has 24 states, 24 states have (on average 54.083333333333336) internal successors, (1298), 24 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:38,539 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:27:38,539 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:27:38,539 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:27:42,188 INFO L129 PetriNetUnfolder]: 503/3725 cut-off events. [2021-11-02 23:27:42,188 INFO L130 PetriNetUnfolder]: For 893515/894457 co-relation queries the response was YES. [2021-11-02 23:27:42,582 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43683 conditions, 3725 events. 503/3725 cut-off events. For 893515/894457 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 34838 event pairs, 0 based on Foata normal form. 209/3538 useless extension candidates. Maximal degree in co-relation 43348. Up to 728 conditions per place. [2021-11-02 23:27:42,649 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 122 selfloop transitions, 465 changer transitions 17/648 dead transitions. [2021-11-02 23:27:42,649 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 783 places, 648 transitions, 38150 flow [2021-11-02 23:27:42,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-02 23:27:42,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-11-02 23:27:42,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2670 transitions. [2021-11-02 23:27:42,651 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8428030303030303 [2021-11-02 23:27:42,651 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2670 transitions. [2021-11-02 23:27:42,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2670 transitions. [2021-11-02 23:27:42,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:27:42,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2670 transitions. [2021-11-02 23:27:42,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 55.625) internal successors, (2670), 48 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:42,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 66.0) internal successors, (3234), 49 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:42,656 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 66.0) internal successors, (3234), 49 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:42,657 INFO L186 Difference]: Start difference. First operand has 739 places, 583 transitions, 28930 flow. Second operand 48 states and 2670 transitions. [2021-11-02 23:27:42,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 783 places, 648 transitions, 38150 flow [2021-11-02 23:27:49,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 747 places, 648 transitions, 36622 flow, removed 390 selfloop flow, removed 36 redundant places. [2021-11-02 23:27:49,072 INFO L242 Difference]: Finished difference. Result has 757 places, 595 transitions, 29950 flow [2021-11-02 23:27:49,073 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=27786, PETRI_DIFFERENCE_MINUEND_PLACES=700, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=454, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=29950, PETRI_PLACES=757, PETRI_TRANSITIONS=595} [2021-11-02 23:27:49,073 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 691 predicate places. [2021-11-02 23:27:49,073 INFO L470 AbstractCegarLoop]: Abstraction has has 757 places, 595 transitions, 29950 flow [2021-11-02 23:27:49,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.083333333333336) internal successors, (1298), 24 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:49,074 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:27:49,074 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:27:49,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-11-02 23:27:49,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-11-02 23:27:49,274 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:27:49,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:27:49,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1154914880, now seen corresponding path program 81 times [2021-11-02 23:27:49,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:27:49,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091788281] [2021-11-02 23:27:49,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:27:49,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:27:49,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:27:49,629 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:27:49,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:27:49,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091788281] [2021-11-02 23:27:49,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091788281] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:27:49,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230118235] [2021-11-02 23:27:49,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:27:49,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:27:49,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:27:49,631 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:27:49,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-11-02 23:27:53,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-02 23:27:53,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:27:53,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-02 23:27:53,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:27:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:27:54,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230118235] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:27:54,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:27:54,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-11-02 23:27:54,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804115362] [2021-11-02 23:27:54,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 23:27:54,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:27:54,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 23:27:54,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:27:54,218 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:27:54,219 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 757 places, 595 transitions, 29950 flow. Second operand has 23 states, 23 states have (on average 54.04347826086956) internal successors, (1243), 23 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:54,219 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:27:54,219 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:27:54,219 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:27:57,271 INFO L129 PetriNetUnfolder]: 499/3712 cut-off events. [2021-11-02 23:27:57,271 INFO L130 PetriNetUnfolder]: For 983022/983842 co-relation queries the response was YES. [2021-11-02 23:27:57,386 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44572 conditions, 3712 events. 499/3712 cut-off events. For 983022/983842 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 34620 event pairs, 0 based on Foata normal form. 73/3387 useless extension candidates. Maximal degree in co-relation 44230. Up to 826 conditions per place. [2021-11-02 23:27:57,436 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 516 selfloop transitions, 63 changer transitions 8/631 dead transitions. [2021-11-02 23:27:57,436 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 778 places, 631 transitions, 35472 flow [2021-11-02 23:27:57,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 23:27:57,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-11-02 23:27:57,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1496 transitions. [2021-11-02 23:27:57,438 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8395061728395061 [2021-11-02 23:27:57,438 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1496 transitions. [2021-11-02 23:27:57,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1496 transitions. [2021-11-02 23:27:57,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:27:57,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1496 transitions. [2021-11-02 23:27:57,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 55.407407407407405) internal successors, (1496), 27 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:57,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:57,441 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:27:57,441 INFO L186 Difference]: Start difference. First operand has 757 places, 595 transitions, 29950 flow. Second operand 27 states and 1496 transitions. [2021-11-02 23:27:57,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 778 places, 631 transitions, 35472 flow [2021-11-02 23:28:04,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 738 places, 631 transitions, 33621 flow, removed 527 selfloop flow, removed 40 redundant places. [2021-11-02 23:28:04,560 INFO L242 Difference]: Finished difference. Result has 743 places, 597 transitions, 28639 flow [2021-11-02 23:28:04,561 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=28213, PETRI_DIFFERENCE_MINUEND_PLACES=712, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=28639, PETRI_PLACES=743, PETRI_TRANSITIONS=597} [2021-11-02 23:28:04,561 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 677 predicate places. [2021-11-02 23:28:04,561 INFO L470 AbstractCegarLoop]: Abstraction has has 743 places, 597 transitions, 28639 flow [2021-11-02 23:28:04,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.04347826086956) internal successors, (1243), 23 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:28:04,562 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:28:04,562 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:28:04,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-11-02 23:28:04,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-11-02 23:28:04,763 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:28:04,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:28:04,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1586351402, now seen corresponding path program 82 times [2021-11-02 23:28:04,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:28:04,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385407886] [2021-11-02 23:28:04,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:28:04,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:28:04,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:28:05,104 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:28:05,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:28:05,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385407886] [2021-11-02 23:28:05,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385407886] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:28:05,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124648646] [2021-11-02 23:28:05,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:28:05,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:28:05,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:28:05,108 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:28:05,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-11-02 23:28:09,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:28:09,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:28:09,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-02 23:28:09,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:28:09,819 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:28:09,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124648646] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:28:09,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:28:09,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-11-02 23:28:09,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757471247] [2021-11-02 23:28:09,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 23:28:09,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:28:09,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 23:28:09,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:28:09,822 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:28:09,822 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 743 places, 597 transitions, 28639 flow. Second operand has 23 states, 23 states have (on average 54.04347826086956) internal successors, (1243), 23 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:28:09,822 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:28:09,822 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:28:09,823 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:28:12,941 INFO L129 PetriNetUnfolder]: 501/3723 cut-off events. [2021-11-02 23:28:12,942 INFO L130 PetriNetUnfolder]: For 971644/972440 co-relation queries the response was YES. [2021-11-02 23:28:13,061 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44030 conditions, 3723 events. 501/3723 cut-off events. For 971644/972440 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 34756 event pairs, 0 based on Foata normal form. 92/3416 useless extension candidates. Maximal degree in co-relation 43687. Up to 716 conditions per place. [2021-11-02 23:28:13,111 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 415 selfloop transitions, 167 changer transitions 8/634 dead transitions. [2021-11-02 23:28:13,112 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 769 places, 634 transitions, 34451 flow [2021-11-02 23:28:13,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-02 23:28:13,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-11-02 23:28:13,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1661 transitions. [2021-11-02 23:28:13,113 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8388888888888889 [2021-11-02 23:28:13,113 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1661 transitions. [2021-11-02 23:28:13,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1661 transitions. [2021-11-02 23:28:13,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:28:13,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1661 transitions. [2021-11-02 23:28:13,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 55.36666666666667) internal successors, (1661), 30 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:28:13,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:28:13,117 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 66.0) internal successors, (2046), 31 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:28:13,117 INFO L186 Difference]: Start difference. First operand has 743 places, 597 transitions, 28639 flow. Second operand 30 states and 1661 transitions. [2021-11-02 23:28:13,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 769 places, 634 transitions, 34451 flow [2021-11-02 23:28:19,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 744 places, 634 transitions, 33985 flow, removed 170 selfloop flow, removed 25 redundant places. [2021-11-02 23:28:19,427 INFO L242 Difference]: Finished difference. Result has 749 places, 599 transitions, 28981 flow [2021-11-02 23:28:19,428 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=28339, PETRI_DIFFERENCE_MINUEND_PLACES=715, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=28981, PETRI_PLACES=749, PETRI_TRANSITIONS=599} [2021-11-02 23:28:19,428 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 683 predicate places. [2021-11-02 23:28:19,428 INFO L470 AbstractCegarLoop]: Abstraction has has 749 places, 599 transitions, 28981 flow [2021-11-02 23:28:19,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.04347826086956) internal successors, (1243), 23 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:28:19,429 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:28:19,429 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:28:19,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-11-02 23:28:19,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:28:19,629 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:28:19,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:28:19,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1419435612, now seen corresponding path program 83 times [2021-11-02 23:28:19,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:28:19,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633965308] [2021-11-02 23:28:19,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:28:19,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:28:19,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:28:20,030 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:28:20,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:28:20,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633965308] [2021-11-02 23:28:20,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633965308] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:28:20,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046664056] [2021-11-02 23:28:20,031 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:28:20,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:28:20,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:28:20,032 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:28:20,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-11-02 23:28:24,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-02 23:28:24,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:28:24,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-02 23:28:24,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:28:24,769 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 4 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:28:24,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046664056] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:28:24,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:28:24,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-02 23:28:24,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452048693] [2021-11-02 23:28:24,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 23:28:24,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:28:24,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 23:28:24,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:28:24,772 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:28:24,773 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 749 places, 599 transitions, 28981 flow. Second operand has 24 states, 24 states have (on average 54.083333333333336) internal successors, (1298), 24 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:28:24,773 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:28:24,773 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:28:24,773 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:28:28,090 INFO L129 PetriNetUnfolder]: 505/3766 cut-off events. [2021-11-02 23:28:28,090 INFO L130 PetriNetUnfolder]: For 972181/972922 co-relation queries the response was YES. [2021-11-02 23:28:28,197 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44453 conditions, 3766 events. 505/3766 cut-off events. For 972181/972922 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 35159 event pairs, 0 based on Foata normal form. 107/3469 useless extension candidates. Maximal degree in co-relation 44108. Up to 724 conditions per place. [2021-11-02 23:28:28,247 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 368 selfloop transitions, 219 changer transitions 8/639 dead transitions. [2021-11-02 23:28:28,247 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 778 places, 639 transitions, 35053 flow [2021-11-02 23:28:28,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-02 23:28:28,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-11-02 23:28:28,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1828 transitions. [2021-11-02 23:28:28,249 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8393021120293848 [2021-11-02 23:28:28,249 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1828 transitions. [2021-11-02 23:28:28,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1828 transitions. [2021-11-02 23:28:28,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:28:28,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1828 transitions. [2021-11-02 23:28:28,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 55.39393939393939) internal successors, (1828), 33 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:28:28,252 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) [2021-11-02 23:28:28,252 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) [2021-11-02 23:28:28,252 INFO L186 Difference]: Start difference. First operand has 749 places, 599 transitions, 28981 flow. Second operand 33 states and 1828 transitions. [2021-11-02 23:28:28,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 778 places, 639 transitions, 35053 flow [2021-11-02 23:28:34,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 751 places, 639 transitions, 34439 flow, removed 149 selfloop flow, removed 27 redundant places. [2021-11-02 23:28:34,967 INFO L242 Difference]: Finished difference. Result has 756 places, 603 transitions, 29407 flow [2021-11-02 23:28:34,968 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=28503, PETRI_DIFFERENCE_MINUEND_PLACES=719, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=29407, PETRI_PLACES=756, PETRI_TRANSITIONS=603} [2021-11-02 23:28:34,968 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 690 predicate places. [2021-11-02 23:28:34,968 INFO L470 AbstractCegarLoop]: Abstraction has has 756 places, 603 transitions, 29407 flow [2021-11-02 23:28:34,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.083333333333336) internal successors, (1298), 24 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:28:34,969 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:28:34,969 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:28:35,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-11-02 23:28:35,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:28:35,169 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:28:35,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:28:35,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1612210944, now seen corresponding path program 84 times [2021-11-02 23:28:35,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:28:35,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975164809] [2021-11-02 23:28:35,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:28:35,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:28:35,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:28:35,495 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:28:35,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:28:35,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975164809] [2021-11-02 23:28:35,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975164809] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:28:35,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674696958] [2021-11-02 23:28:35,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:28:35,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:28:35,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:28:35,496 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:28:35,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-11-02 23:28:39,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-02 23:28:39,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:28:39,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-02 23:28:39,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:28:40,189 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:28:40,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674696958] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:28:40,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:28:40,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-11-02 23:28:40,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046059922] [2021-11-02 23:28:40,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 23:28:40,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:28:40,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 23:28:40,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:28:40,192 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:28:40,193 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 756 places, 603 transitions, 29407 flow. Second operand has 23 states, 23 states have (on average 54.04347826086956) internal successors, (1243), 23 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:28:40,193 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:28:40,193 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:28:40,193 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:28:43,669 INFO L129 PetriNetUnfolder]: 513/3831 cut-off events. [2021-11-02 23:28:43,669 INFO L130 PetriNetUnfolder]: For 993809/994600 co-relation queries the response was YES. [2021-11-02 23:28:43,771 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45455 conditions, 3831 events. 513/3831 cut-off events. For 993809/994600 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 36017 event pairs, 0 based on Foata normal form. 142/3562 useless extension candidates. Maximal degree in co-relation 45108. Up to 740 conditions per place. [2021-11-02 23:28:43,821 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 262 selfloop transitions, 336 changer transitions 8/650 dead transitions. [2021-11-02 23:28:43,821 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 786 places, 650 transitions, 36238 flow [2021-11-02 23:28:43,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-02 23:28:43,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-11-02 23:28:43,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1885 transitions. [2021-11-02 23:28:43,823 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8400178253119429 [2021-11-02 23:28:43,823 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1885 transitions. [2021-11-02 23:28:43,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1885 transitions. [2021-11-02 23:28:43,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:28:43,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1885 transitions. [2021-11-02 23:28:43,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 55.44117647058823) internal successors, (1885), 34 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:28:43,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:28:43,827 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 66.0) internal successors, (2310), 35 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:28:43,827 INFO L186 Difference]: Start difference. First operand has 756 places, 603 transitions, 29407 flow. Second operand 34 states and 1885 transitions. [2021-11-02 23:28:43,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 786 places, 650 transitions, 36238 flow [2021-11-02 23:28:51,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 756 places, 650 transitions, 35508 flow, removed 159 selfloop flow, removed 30 redundant places. [2021-11-02 23:28:51,169 INFO L242 Difference]: Finished difference. Result has 767 places, 611 transitions, 30462 flow [2021-11-02 23:28:51,170 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=28825, PETRI_DIFFERENCE_MINUEND_PLACES=723, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=328, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=30462, PETRI_PLACES=767, PETRI_TRANSITIONS=611} [2021-11-02 23:28:51,170 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 701 predicate places. [2021-11-02 23:28:51,170 INFO L470 AbstractCegarLoop]: Abstraction has has 767 places, 611 transitions, 30462 flow [2021-11-02 23:28:51,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.04347826086956) internal successors, (1243), 23 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:28:51,170 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:28:51,171 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:28:51,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-11-02 23:28:51,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-11-02 23:28:51,371 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:28:51,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:28:51,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1823751528, now seen corresponding path program 85 times [2021-11-02 23:28:51,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:28:51,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20355350] [2021-11-02 23:28:51,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:28:51,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:28:51,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:28:51,677 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:28:51,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:28:51,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20355350] [2021-11-02 23:28:51,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20355350] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:28:51,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999887052] [2021-11-02 23:28:51,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:28:51,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:28:51,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:28:51,681 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:28:51,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-11-02 23:28:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:28:55,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-02 23:28:55,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:28:56,449 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:28:56,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999887052] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:28:56,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:28:56,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-11-02 23:28:56,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931516950] [2021-11-02 23:28:56,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 23:28:56,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:28:56,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 23:28:56,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:28:56,453 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:28:56,454 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 767 places, 611 transitions, 30462 flow. Second operand has 23 states, 23 states have (on average 54.04347826086956) internal successors, (1243), 23 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:28:56,455 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:28:56,455 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:28:56,455 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:29:00,117 INFO L129 PetriNetUnfolder]: 521/3910 cut-off events. [2021-11-02 23:29:00,117 INFO L130 PetriNetUnfolder]: For 1014521/1015262 co-relation queries the response was YES. [2021-11-02 23:29:00,234 INFO L84 FinitePrefix]: Finished finitePrefix Result has 46599 conditions, 3910 events. 521/3910 cut-off events. For 1014521/1015262 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 36872 event pairs, 0 based on Foata normal form. 170/3660 useless extension candidates. Maximal degree in co-relation 46244. Up to 756 conditions per place. [2021-11-02 23:29:00,286 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 179 selfloop transitions, 431 changer transitions 8/662 dead transitions. [2021-11-02 23:29:00,286 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 801 places, 662 transitions, 37819 flow [2021-11-02 23:29:00,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-02 23:29:00,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-11-02 23:29:00,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2109 transitions. [2021-11-02 23:29:00,288 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8409090909090909 [2021-11-02 23:29:00,288 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2109 transitions. [2021-11-02 23:29:00,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2109 transitions. [2021-11-02 23:29:00,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:29:00,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2109 transitions. [2021-11-02 23:29:00,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 55.5) internal successors, (2109), 38 states have internal predecessors, (2109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:29:00,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 66.0) internal successors, (2574), 39 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:29:00,293 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 66.0) internal successors, (2574), 39 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:29:00,293 INFO L186 Difference]: Start difference. First operand has 767 places, 611 transitions, 30462 flow. Second operand 38 states and 2109 transitions. [2021-11-02 23:29:00,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 801 places, 662 transitions, 37819 flow [2021-11-02 23:29:09,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 777 places, 662 transitions, 37055 flow, removed 173 selfloop flow, removed 24 redundant places. [2021-11-02 23:29:09,466 INFO L242 Difference]: Finished difference. Result has 784 places, 619 transitions, 31563 flow [2021-11-02 23:29:09,467 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=29862, PETRI_DIFFERENCE_MINUEND_PLACES=740, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=423, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=31563, PETRI_PLACES=784, PETRI_TRANSITIONS=619} [2021-11-02 23:29:09,467 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 718 predicate places. [2021-11-02 23:29:09,467 INFO L470 AbstractCegarLoop]: Abstraction has has 784 places, 619 transitions, 31563 flow [2021-11-02 23:29:09,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.04347826086956) internal successors, (1243), 23 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:29:09,468 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:29:09,468 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:29:09,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-11-02 23:29:09,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:29:09,669 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:29:09,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:29:09,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1518941966, now seen corresponding path program 86 times [2021-11-02 23:29:09,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:29:09,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530399995] [2021-11-02 23:29:09,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:29:09,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:29:09,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:29:09,948 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:29:09,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:29:09,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530399995] [2021-11-02 23:29:09,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530399995] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:29:09,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146698021] [2021-11-02 23:29:09,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:29:09,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:29:09,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:29:09,950 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:29:09,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-11-02 23:29:14,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:29:14,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:29:14,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-02 23:29:14,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:29:14,590 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:29:14,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146698021] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:29:14,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:29:14,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-11-02 23:29:14,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138252335] [2021-11-02 23:29:14,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 23:29:14,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:29:14,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 23:29:14,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:29:14,593 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:29:14,594 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 784 places, 619 transitions, 31563 flow. Second operand has 23 states, 23 states have (on average 54.04347826086956) internal successors, (1243), 23 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:29:14,594 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:29:14,594 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:29:14,594 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:29:18,554 INFO L129 PetriNetUnfolder]: 525/3939 cut-off events. [2021-11-02 23:29:18,554 INFO L130 PetriNetUnfolder]: For 1027061/1027829 co-relation queries the response was YES. [2021-11-02 23:29:18,673 INFO L84 FinitePrefix]: Finished finitePrefix Result has 47324 conditions, 3939 events. 525/3939 cut-off events. For 1027061/1027829 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 37246 event pairs, 0 based on Foata normal form. 193/3709 useless extension candidates. Maximal degree in co-relation 46965. Up to 764 conditions per place. [2021-11-02 23:29:18,726 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 141 selfloop transitions, 475 changer transitions 8/668 dead transitions. [2021-11-02 23:29:18,726 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 820 places, 668 transitions, 38927 flow [2021-11-02 23:29:18,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-02 23:29:18,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-11-02 23:29:18,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2221 transitions. [2021-11-02 23:29:18,728 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8412878787878788 [2021-11-02 23:29:18,728 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2221 transitions. [2021-11-02 23:29:18,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2221 transitions. [2021-11-02 23:29:18,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:29:18,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2221 transitions. [2021-11-02 23:29:18,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 55.525) internal successors, (2221), 40 states have internal predecessors, (2221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:29:18,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 66.0) internal successors, (2706), 41 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:29:18,733 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 66.0) internal successors, (2706), 41 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:29:18,733 INFO L186 Difference]: Start difference. First operand has 784 places, 619 transitions, 31563 flow. Second operand 40 states and 2221 transitions. [2021-11-02 23:29:18,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 820 places, 668 transitions, 38927 flow [2021-11-02 23:29:28,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 787 places, 668 transitions, 37848 flow, removed 171 selfloop flow, removed 33 redundant places. [2021-11-02 23:29:28,619 INFO L242 Difference]: Finished difference. Result has 792 places, 623 transitions, 32091 flow [2021-11-02 23:29:28,620 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=30656, PETRI_DIFFERENCE_MINUEND_PLACES=748, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=471, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=32091, PETRI_PLACES=792, PETRI_TRANSITIONS=623} [2021-11-02 23:29:28,620 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 726 predicate places. [2021-11-02 23:29:28,621 INFO L470 AbstractCegarLoop]: Abstraction has has 792 places, 623 transitions, 32091 flow [2021-11-02 23:29:28,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.04347826086956) internal successors, (1243), 23 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:29:28,621 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:29:28,621 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:29:28,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-11-02 23:29:28,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:29:28,822 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:29:28,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:29:28,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1524626924, now seen corresponding path program 87 times [2021-11-02 23:29:28,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:29:28,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539286684] [2021-11-02 23:29:28,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:29:28,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:29:28,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:29:29,095 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:29:29,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:29:29,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539286684] [2021-11-02 23:29:29,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539286684] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:29:29,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792033131] [2021-11-02 23:29:29,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:29:29,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:29:29,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:29:29,097 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:29:29,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-11-02 23:29:33,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-02 23:29:33,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:29:33,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-02 23:29:33,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:29:33,810 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:29:33,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792033131] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:29:33,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:29:33,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-02 23:29:33,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005526354] [2021-11-02 23:29:33,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 23:29:33,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:29:33,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 23:29:33,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:29:33,813 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:29:33,813 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 792 places, 623 transitions, 32091 flow. Second operand has 24 states, 24 states have (on average 54.083333333333336) internal successors, (1298), 24 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:29:33,814 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:29:33,814 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:29:33,814 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:29:38,076 INFO L129 PetriNetUnfolder]: 531/3963 cut-off events. [2021-11-02 23:29:38,076 INFO L130 PetriNetUnfolder]: For 1040829/1041659 co-relation queries the response was YES. [2021-11-02 23:29:38,193 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48011 conditions, 3963 events. 531/3963 cut-off events. For 1040829/1041659 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 37408 event pairs, 0 based on Foata normal form. 206/3748 useless extension candidates. Maximal degree in co-relation 47650. Up to 774 conditions per place. [2021-11-02 23:29:38,246 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 109 selfloop transitions, 520 changer transitions 8/681 dead transitions. [2021-11-02 23:29:38,246 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 832 places, 681 transitions, 40422 flow [2021-11-02 23:29:38,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-02 23:29:38,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-11-02 23:29:38,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2446 transitions. [2021-11-02 23:29:38,249 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8422865013774105 [2021-11-02 23:29:38,249 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2446 transitions. [2021-11-02 23:29:38,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2446 transitions. [2021-11-02 23:29:38,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:29:38,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2446 transitions. [2021-11-02 23:29:38,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 55.59090909090909) internal successors, (2446), 44 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:29:38,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 66.0) internal successors, (2970), 45 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:29:38,254 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 66.0) internal successors, (2970), 45 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:29:38,254 INFO L186 Difference]: Start difference. First operand has 792 places, 623 transitions, 32091 flow. Second operand 44 states and 2446 transitions. [2021-11-02 23:29:38,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 832 places, 681 transitions, 40422 flow [2021-11-02 23:29:45,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 795 places, 681 transitions, 39165 flow, removed 185 selfloop flow, removed 37 redundant places. [2021-11-02 23:29:45,786 INFO L242 Difference]: Finished difference. Result has 802 places, 629 transitions, 32819 flow [2021-11-02 23:29:45,787 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=31034, PETRI_DIFFERENCE_MINUEND_PLACES=752, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=515, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=32819, PETRI_PLACES=802, PETRI_TRANSITIONS=629} [2021-11-02 23:29:45,787 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 736 predicate places. [2021-11-02 23:29:45,787 INFO L470 AbstractCegarLoop]: Abstraction has has 802 places, 629 transitions, 32819 flow [2021-11-02 23:29:45,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.083333333333336) internal successors, (1298), 24 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:29:45,787 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:29:45,787 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:29:45,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-11-02 23:29:45,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:29:45,988 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:29:45,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:29:45,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1867568503, now seen corresponding path program 88 times [2021-11-02 23:29:45,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:29:45,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500962208] [2021-11-02 23:29:45,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:29:45,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:29:46,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:29:46,367 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:29:46,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:29:46,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500962208] [2021-11-02 23:29:46,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500962208] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:29:46,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322006950] [2021-11-02 23:29:46,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:29:46,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:29:46,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:29:46,369 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:29:46,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-11-02 23:29:50,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:29:50,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:29:50,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-02 23:29:50,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:29:51,441 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:29:51,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322006950] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:29:51,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:29:51,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-11-02 23:29:51,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786554109] [2021-11-02 23:29:51,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 23:29:51,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:29:51,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 23:29:51,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:29:51,445 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:29:51,447 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 802 places, 629 transitions, 32819 flow. Second operand has 24 states, 24 states have (on average 54.041666666666664) internal successors, (1297), 24 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:29:51,447 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:29:51,447 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:29:51,447 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:29:55,152 INFO L129 PetriNetUnfolder]: 533/4016 cut-off events. [2021-11-02 23:29:55,152 INFO L130 PetriNetUnfolder]: For 1068947/1069648 co-relation queries the response was YES. [2021-11-02 23:29:55,283 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48782 conditions, 4016 events. 533/4016 cut-off events. For 1068947/1069648 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 37942 event pairs, 0 based on Foata normal form. 77/3663 useless extension candidates. Maximal degree in co-relation 48417. Up to 947 conditions per place. [2021-11-02 23:29:55,337 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 577 selfloop transitions, 33 changer transitions 8/662 dead transitions. [2021-11-02 23:29:55,337 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 825 places, 662 transitions, 38417 flow [2021-11-02 23:29:55,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 23:29:55,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-11-02 23:29:55,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1495 transitions. [2021-11-02 23:29:55,339 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8389450056116723 [2021-11-02 23:29:55,339 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1495 transitions. [2021-11-02 23:29:55,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1495 transitions. [2021-11-02 23:29:55,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:29:55,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1495 transitions. [2021-11-02 23:29:55,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 55.370370370370374) internal successors, (1495), 27 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:29:55,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:29:55,342 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 66.0) internal successors, (1848), 28 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:29:55,342 INFO L186 Difference]: Start difference. First operand has 802 places, 629 transitions, 32819 flow. Second operand 27 states and 1495 transitions. [2021-11-02 23:29:55,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 825 places, 662 transitions, 38417 flow [2021-11-02 23:30:04,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 789 places, 662 transitions, 37076 flow, removed 206 selfloop flow, removed 36 redundant places. [2021-11-02 23:30:04,863 INFO L242 Difference]: Finished difference. Result has 794 places, 631 transitions, 31904 flow [2021-11-02 23:30:04,864 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=31536, PETRI_DIFFERENCE_MINUEND_PLACES=763, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=31904, PETRI_PLACES=794, PETRI_TRANSITIONS=631} [2021-11-02 23:30:04,864 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 728 predicate places. [2021-11-02 23:30:04,864 INFO L470 AbstractCegarLoop]: Abstraction has has 794 places, 631 transitions, 31904 flow [2021-11-02 23:30:04,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.041666666666664) internal successors, (1297), 24 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:30:04,864 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:30:04,864 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:30:04,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-11-02 23:30:05,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:30:05,065 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:30:05,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:30:05,066 INFO L85 PathProgramCache]: Analyzing trace with hash -477249961, now seen corresponding path program 89 times [2021-11-02 23:30:05,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:30:05,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069009676] [2021-11-02 23:30:05,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:30:05,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:30:05,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:30:05,459 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:30:05,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:30:05,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069009676] [2021-11-02 23:30:05,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069009676] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:30:05,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653363353] [2021-11-02 23:30:05,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:30:05,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:30:05,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:30:05,460 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:30:05,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-11-02 23:30:09,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-02 23:30:09,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:30:09,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-02 23:30:09,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:30:10,488 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:30:10,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653363353] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:30:10,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:30:10,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-11-02 23:30:10,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684309662] [2021-11-02 23:30:10,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 23:30:10,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:30:10,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 23:30:10,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:30:10,491 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:30:10,491 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 794 places, 631 transitions, 31904 flow. Second operand has 24 states, 24 states have (on average 54.041666666666664) internal successors, (1297), 24 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:30:10,492 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:30:10,492 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:30:10,492 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:30:14,350 INFO L129 PetriNetUnfolder]: 535/4034 cut-off events. [2021-11-02 23:30:14,350 INFO L130 PetriNetUnfolder]: For 1101635/1102341 co-relation queries the response was YES. [2021-11-02 23:30:14,468 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48879 conditions, 4034 events. 535/4034 cut-off events. For 1101635/1102341 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 38035 event pairs, 0 based on Foata normal form. 81/3683 useless extension candidates. Maximal degree in co-relation 48513. Up to 858 conditions per place. [2021-11-02 23:30:14,523 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 532 selfloop transitions, 82 changer transitions 8/666 dead transitions. [2021-11-02 23:30:14,523 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 821 places, 666 transitions, 37864 flow [2021-11-02 23:30:14,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 23:30:14,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-11-02 23:30:14,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1718 transitions. [2021-11-02 23:30:14,525 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8396871945259042 [2021-11-02 23:30:14,525 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1718 transitions. [2021-11-02 23:30:14,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1718 transitions. [2021-11-02 23:30:14,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:30:14,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1718 transitions. [2021-11-02 23:30:14,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 55.41935483870968) internal successors, (1718), 31 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:30:14,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:30:14,528 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 66.0) internal successors, (2112), 32 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:30:14,528 INFO L186 Difference]: Start difference. First operand has 794 places, 631 transitions, 31904 flow. Second operand 31 states and 1718 transitions. [2021-11-02 23:30:14,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 821 places, 666 transitions, 37864 flow [2021-11-02 23:30:23,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 797 places, 666 transitions, 37492 flow, removed 155 selfloop flow, removed 24 redundant places. [2021-11-02 23:30:23,091 INFO L242 Difference]: Finished difference. Result has 802 places, 633 transitions, 32134 flow [2021-11-02 23:30:23,092 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=31664, PETRI_DIFFERENCE_MINUEND_PLACES=767, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=32134, PETRI_PLACES=802, PETRI_TRANSITIONS=633} [2021-11-02 23:30:23,092 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 736 predicate places. [2021-11-02 23:30:23,093 INFO L470 AbstractCegarLoop]: Abstraction has has 802 places, 633 transitions, 32134 flow [2021-11-02 23:30:23,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.041666666666664) internal successors, (1297), 24 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:30:23,093 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:30:23,093 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:30:23,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-11-02 23:30:23,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-11-02 23:30:23,294 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:30:23,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:30:23,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1001698781, now seen corresponding path program 90 times [2021-11-02 23:30:23,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:30:23,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039955258] [2021-11-02 23:30:23,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:30:23,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:30:23,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:30:23,629 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:30:23,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:30:23,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039955258] [2021-11-02 23:30:23,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039955258] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:30:23,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067391943] [2021-11-02 23:30:23,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:30:23,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:30:23,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:30:23,630 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:30:23,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-11-02 23:30:28,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-11-02 23:30:28,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:30:28,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-02 23:30:28,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:30:28,824 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:30:28,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067391943] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:30:28,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:30:28,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-11-02 23:30:28,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073216461] [2021-11-02 23:30:28,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 23:30:28,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:30:28,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 23:30:28,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:30:28,826 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:30:28,827 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 802 places, 633 transitions, 32134 flow. Second operand has 24 states, 24 states have (on average 54.041666666666664) internal successors, (1297), 24 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:30:28,827 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:30:28,827 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:30:28,827 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:30:32,484 INFO L129 PetriNetUnfolder]: 537/4052 cut-off events. [2021-11-02 23:30:32,484 INFO L130 PetriNetUnfolder]: For 1104202/1104908 co-relation queries the response was YES. [2021-11-02 23:30:32,634 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49158 conditions, 4052 events. 537/4052 cut-off events. For 1104202/1104908 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 38204 event pairs, 0 based on Foata normal form. 125/3743 useless extension candidates. Maximal degree in co-relation 48790. Up to 786 conditions per place. [2021-11-02 23:30:32,689 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 359 selfloop transitions, 261 changer transitions 8/672 dead transitions. [2021-11-02 23:30:32,690 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 834 places, 672 transitions, 38682 flow [2021-11-02 23:30:32,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-02 23:30:32,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-02 23:30:32,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1995 transitions. [2021-11-02 23:30:32,692 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8396464646464646 [2021-11-02 23:30:32,692 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1995 transitions. [2021-11-02 23:30:32,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1995 transitions. [2021-11-02 23:30:32,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:30:32,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1995 transitions. [2021-11-02 23:30:32,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.416666666666664) internal successors, (1995), 36 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:30:32,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:30:32,696 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 66.0) internal successors, (2442), 37 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:30:32,696 INFO L186 Difference]: Start difference. First operand has 802 places, 633 transitions, 32134 flow. Second operand 36 states and 1995 transitions. [2021-11-02 23:30:32,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 834 places, 672 transitions, 38682 flow [2021-11-02 23:30:42,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 806 places, 672 transitions, 38204 flow, removed 161 selfloop flow, removed 28 redundant places. [2021-11-02 23:30:42,645 INFO L242 Difference]: Finished difference. Result has 811 places, 635 transitions, 32649 flow [2021-11-02 23:30:42,646 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=31804, PETRI_DIFFERENCE_MINUEND_PLACES=771, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=32649, PETRI_PLACES=811, PETRI_TRANSITIONS=635} [2021-11-02 23:30:42,646 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 745 predicate places. [2021-11-02 23:30:42,646 INFO L470 AbstractCegarLoop]: Abstraction has has 811 places, 635 transitions, 32649 flow [2021-11-02 23:30:42,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.041666666666664) internal successors, (1297), 24 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:30:42,647 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:30:42,647 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:30:42,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-11-02 23:30:42,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-11-02 23:30:42,847 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:30:42,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:30:42,848 INFO L85 PathProgramCache]: Analyzing trace with hash -451492871, now seen corresponding path program 91 times [2021-11-02 23:30:42,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:30:42,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690564368] [2021-11-02 23:30:42,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:30:42,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:30:42,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:30:43,270 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:30:43,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:30:43,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690564368] [2021-11-02 23:30:43,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690564368] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:30:43,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747627387] [2021-11-02 23:30:43,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:30:43,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:30:43,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:30:43,272 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:30:43,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-11-02 23:30:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:30:47,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-02 23:30:47,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:30:48,571 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:30:48,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747627387] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:30:48,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:30:48,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-11-02 23:30:48,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842875593] [2021-11-02 23:30:48,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 23:30:48,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:30:48,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 23:30:48,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-11-02 23:30:48,574 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-11-02 23:30:48,575 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 811 places, 635 transitions, 32649 flow. Second operand has 25 states, 25 states have (on average 54.08) internal successors, (1352), 25 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:30:48,575 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 23:30:48,575 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-11-02 23:30:48,575 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 23:30:52,498 INFO L129 PetriNetUnfolder]: 539/4070 cut-off events. [2021-11-02 23:30:52,498 INFO L130 PetriNetUnfolder]: For 1111781/1112487 co-relation queries the response was YES. [2021-11-02 23:30:52,627 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49579 conditions, 4070 events. 539/4070 cut-off events. For 1111781/1112487 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 38420 event pairs, 0 based on Foata normal form. 130/3764 useless extension candidates. Maximal degree in co-relation 49208. Up to 790 conditions per place. [2021-11-02 23:30:52,681 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 324 selfloop transitions, 299 changer transitions 8/675 dead transitions. [2021-11-02 23:30:52,681 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 844 places, 675 transitions, 39345 flow [2021-11-02 23:30:52,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-02 23:30:52,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-11-02 23:30:52,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2051 transitions. [2021-11-02 23:30:52,686 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8398853398853399 [2021-11-02 23:30:52,686 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2051 transitions. [2021-11-02 23:30:52,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2051 transitions. [2021-11-02 23:30:52,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 23:30:52,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2051 transitions. [2021-11-02 23:30:52,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 55.432432432432435) internal successors, (2051), 37 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:30:52,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 66.0) internal successors, (2508), 38 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:30:52,690 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 66.0) internal successors, (2508), 38 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:30:52,690 INFO L186 Difference]: Start difference. First operand has 811 places, 635 transitions, 32649 flow. Second operand 37 states and 2051 transitions. [2021-11-02 23:30:52,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 844 places, 675 transitions, 39345 flow [2021-11-02 23:31:02,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 812 places, 675 transitions, 38537 flow, removed 167 selfloop flow, removed 32 redundant places. [2021-11-02 23:31:02,386 INFO L242 Difference]: Finished difference. Result has 817 places, 637 transitions, 32922 flow [2021-11-02 23:31:02,387 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=31993, PETRI_DIFFERENCE_MINUEND_PLACES=776, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=32922, PETRI_PLACES=817, PETRI_TRANSITIONS=637} [2021-11-02 23:31:02,387 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 751 predicate places. [2021-11-02 23:31:02,387 INFO L470 AbstractCegarLoop]: Abstraction has has 817 places, 637 transitions, 32922 flow [2021-11-02 23:31:02,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.08) internal successors, (1352), 25 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:31:02,388 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 23:31:02,388 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:31:02,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-11-02 23:31:02,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-11-02 23:31:02,592 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 23:31:02,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:31:02,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1887708343, now seen corresponding path program 92 times [2021-11-02 23:31:02,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:31:02,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573966519] [2021-11-02 23:31:02,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:31:02,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:31:02,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:31:02,920 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:31:02,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:31:02,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573966519] [2021-11-02 23:31:02,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573966519] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:31:02,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480592501] [2021-11-02 23:31:02,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:31:02,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:31:02,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:31:02,926 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:31:02,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae325a81-e9f6-4de8-a1b1-a525b8519b91/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process