./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/fib_safe-12.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/fib_safe-12.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX --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 d91b46fd69b3013c60bad92e46ce1ef1ddf2b09c97cd6d95697162ae1af201f2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:32:36,868 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:32:36,871 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:32:36,936 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:32:36,937 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:32:36,943 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:32:36,945 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:32:36,950 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:32:36,954 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:32:36,961 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:32:36,963 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:32:36,965 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:32:36,966 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:32:36,969 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:32:36,972 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:32:36,978 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:32:36,980 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:32:36,982 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:32:36,986 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:32:36,995 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:32:36,998 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:32:37,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:32:37,004 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:32:37,006 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:32:37,017 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:32:37,017 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:32:37,018 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:32:37,020 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:32:37,021 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:32:37,023 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:32:37,024 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:32:37,026 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:32:37,028 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:32:37,030 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:32:37,032 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:32:37,033 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:32:37,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:32:37,035 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:32:37,035 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:32:37,037 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:32:37,038 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:32:37,039 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 09:32:37,078 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:32:37,078 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:32:37,079 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:32:37,079 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:32:37,081 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:32:37,081 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:32:37,081 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:32:37,082 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:32:37,082 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:32:37,082 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:32:37,083 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:32:37,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:32:37,083 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:32:37,083 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:32:37,084 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:32:37,084 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:32:37,084 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:32:37,085 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:32:37,085 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:32:37,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:32:37,086 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:32:37,086 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:32:37,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:32:37,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:32:37,087 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:32:37,087 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:32:37,088 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:32:37,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:32:37,088 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:32:37,088 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:32:37,089 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:32:37,089 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:32:37,089 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_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d91b46fd69b3013c60bad92e46ce1ef1ddf2b09c97cd6d95697162ae1af201f2 [2021-11-09 09:32:37,391 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:32:37,436 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:32:37,440 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:32:37,441 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:32:37,442 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:32:37,443 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/pthread/fib_safe-12.i [2021-11-09 09:32:37,539 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/data/3047e0154/ea1a44ad033f44e1aa87dd6de23c898c/FLAGba15689be [2021-11-09 09:32:38,123 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:32:38,124 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/sv-benchmarks/c/pthread/fib_safe-12.i [2021-11-09 09:32:38,143 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/data/3047e0154/ea1a44ad033f44e1aa87dd6de23c898c/FLAGba15689be [2021-11-09 09:32:38,402 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/data/3047e0154/ea1a44ad033f44e1aa87dd6de23c898c [2021-11-09 09:32:38,405 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:32:38,407 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:32:38,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:32:38,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:32:38,422 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:32:38,423 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:32:38" (1/1) ... [2021-11-09 09:32:38,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68c566e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:38, skipping insertion in model container [2021-11-09 09:32:38,428 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:32:38" (1/1) ... [2021-11-09 09:32:38,437 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:32:38,494 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:32:39,015 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_0740cb34-54f3-41e4-91d4-f134fff39d51/sv-benchmarks/c/pthread/fib_safe-12.i[30815,30828] [2021-11-09 09:32:39,019 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:32:39,031 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:32:39,116 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_0740cb34-54f3-41e4-91d4-f134fff39d51/sv-benchmarks/c/pthread/fib_safe-12.i[30815,30828] [2021-11-09 09:32:39,120 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:32:39,178 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:32:39,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:39 WrapperNode [2021-11-09 09:32:39,179 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:32:39,181 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:32:39,181 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:32:39,181 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:32:39,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:39" (1/1) ... [2021-11-09 09:32:39,229 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:39" (1/1) ... [2021-11-09 09:32:39,270 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:32:39,271 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:32:39,272 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:32:39,272 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:32:39,282 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:39" (1/1) ... [2021-11-09 09:32:39,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:39" (1/1) ... [2021-11-09 09:32:39,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:39" (1/1) ... [2021-11-09 09:32:39,290 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:39" (1/1) ... [2021-11-09 09:32:39,309 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:39" (1/1) ... [2021-11-09 09:32:39,318 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:39" (1/1) ... [2021-11-09 09:32:39,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:39" (1/1) ... [2021-11-09 09:32:39,326 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:32:39,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:32:39,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:32:39,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:32:39,335 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:39" (1/1) ... [2021-11-09 09:32:39,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:32:39,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:39,371 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:32:39,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:32:39,428 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-11-09 09:32:39,429 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-11-09 09:32:39,429 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-11-09 09:32:39,429 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-11-09 09:32:39,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 09:32:39,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-09 09:32:39,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:32:39,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 09:32:39,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:32:39,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-09 09:32:39,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:32:39,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:32:39,432 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-09 09:32:39,805 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:32:39,806 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-09 09:32:39,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:32:39 BoogieIcfgContainer [2021-11-09 09:32:39,809 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:32:39,811 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:32:39,816 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:32:39,830 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:32:39,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:32:38" (1/3) ... [2021-11-09 09:32:39,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@799f11ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:32:39, skipping insertion in model container [2021-11-09 09:32:39,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:39" (2/3) ... [2021-11-09 09:32:39,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@799f11ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:32:39, skipping insertion in model container [2021-11-09 09:32:39,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:32:39" (3/3) ... [2021-11-09 09:32:39,834 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_safe-12.i [2021-11-09 09:32:39,840 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-09 09:32:39,855 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:32:39,855 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 09:32:39,856 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-09 09:32:39,931 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,932 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,932 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,932 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,933 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,933 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,933 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,933 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,934 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,934 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,934 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,935 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,935 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,936 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,936 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,936 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,936 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,937 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,938 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,938 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,938 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,951 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,952 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,952 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,952 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,952 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,967 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,968 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,968 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,968 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,969 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,969 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,969 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,970 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,970 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,970 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,974 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,974 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,975 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,975 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,975 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,982 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,982 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,983 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,983 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,983 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:32:39,986 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-11-09 09:32:40,038 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:32:40,046 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 [2021-11-09 09:32:40,046 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-09 09:32:40,063 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 90 places, 90 transitions, 190 flow [2021-11-09 09:32:40,132 INFO L129 PetriNetUnfolder]: 7/88 cut-off events. [2021-11-09 09:32:40,132 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-09 09:32:40,139 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 88 events. 7/88 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 79 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 61. Up to 2 conditions per place. [2021-11-09 09:32:40,139 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 90 transitions, 190 flow [2021-11-09 09:32:40,154 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 88 transitions, 182 flow [2021-11-09 09:32:40,197 INFO L129 PetriNetUnfolder]: 7/80 cut-off events. [2021-11-09 09:32:40,198 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-09 09:32:40,198 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:32:40,200 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:40,201 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:32:40,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:40,208 INFO L85 PathProgramCache]: Analyzing trace with hash -2010782680, now seen corresponding path program 1 times [2021-11-09 09:32:40,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:40,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831305141] [2021-11-09 09:32:40,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:40,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:40,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:40,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:40,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831305141] [2021-11-09 09:32:40,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831305141] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:32:40,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:32:40,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:32:40,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244437850] [2021-11-09 09:32:40,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 09:32:40,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:40,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 09:32:40,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:32:40,559 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 90 [2021-11-09 09:32:40,563 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 88 transitions, 182 flow. Second operand has 2 states, 2 states have (on average 85.5) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:40,563 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:32:40,564 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 90 [2021-11-09 09:32:40,565 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:32:40,639 INFO L129 PetriNetUnfolder]: 3/83 cut-off events. [2021-11-09 09:32:40,640 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-09 09:32:40,641 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 83 events. 3/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 4/83 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2021-11-09 09:32:40,643 INFO L132 encePairwiseOnDemand]: 86/90 looper letters, 0 selfloop transitions, 0 changer transitions 0/83 dead transitions. [2021-11-09 09:32:40,643 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 83 transitions, 172 flow [2021-11-09 09:32:40,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 09:32:40,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-09 09:32:40,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 174 transitions. [2021-11-09 09:32:40,662 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9666666666666667 [2021-11-09 09:32:40,663 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 174 transitions. [2021-11-09 09:32:40,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 174 transitions. [2021-11-09 09:32:40,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:32:40,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 174 transitions. [2021-11-09 09:32:40,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 87.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:40,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:40,679 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:40,681 INFO L186 Difference]: Start difference. First operand has 88 places, 88 transitions, 182 flow. Second operand 2 states and 174 transitions. [2021-11-09 09:32:40,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 83 transitions, 172 flow [2021-11-09 09:32:40,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 83 transitions, 170 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-11-09 09:32:40,690 INFO L242 Difference]: Finished difference. Result has 86 places, 83 transitions, 170 flow [2021-11-09 09:32:40,693 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=170, PETRI_PLACES=86, PETRI_TRANSITIONS=83} [2021-11-09 09:32:40,694 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, -2 predicate places. [2021-11-09 09:32:40,694 INFO L470 AbstractCegarLoop]: Abstraction has has 86 places, 83 transitions, 170 flow [2021-11-09 09:32:40,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 85.5) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:40,695 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:32:40,695 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:40,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:32:40,696 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:32:40,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:40,697 INFO L85 PathProgramCache]: Analyzing trace with hash -267972345, now seen corresponding path program 1 times [2021-11-09 09:32:40,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:40,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813399427] [2021-11-09 09:32:40,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:40,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:40,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:40,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:40,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:40,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813399427] [2021-11-09 09:32:40,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813399427] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:32:40,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:32:40,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:32:40,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019058511] [2021-11-09 09:32:40,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:32:40,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:40,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:32:40,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:32:40,843 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 90 [2021-11-09 09:32:40,844 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:40,844 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:32:40,844 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 90 [2021-11-09 09:32:40,845 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:32:40,889 INFO L129 PetriNetUnfolder]: 3/89 cut-off events. [2021-11-09 09:32:40,890 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-09 09:32:40,891 INFO L84 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 89 events. 3/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 60 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 102. Up to 6 conditions per place. [2021-11-09 09:32:40,892 INFO L132 encePairwiseOnDemand]: 87/90 looper letters, 7 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2021-11-09 09:32:40,892 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 86 transitions, 194 flow [2021-11-09 09:32:40,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:32:40,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-11-09 09:32:40,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 247 transitions. [2021-11-09 09:32:40,896 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9148148148148149 [2021-11-09 09:32:40,896 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 247 transitions. [2021-11-09 09:32:40,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 247 transitions. [2021-11-09 09:32:40,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:32:40,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 247 transitions. [2021-11-09 09:32:40,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:40,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:40,903 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:40,903 INFO L186 Difference]: Start difference. First operand has 86 places, 83 transitions, 170 flow. Second operand 3 states and 247 transitions. [2021-11-09 09:32:40,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 86 transitions, 194 flow [2021-11-09 09:32:40,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 86 transitions, 194 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-09 09:32:40,908 INFO L242 Difference]: Finished difference. Result has 89 places, 84 transitions, 182 flow [2021-11-09 09:32:40,909 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=89, PETRI_TRANSITIONS=84} [2021-11-09 09:32:40,910 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 1 predicate places. [2021-11-09 09:32:40,910 INFO L470 AbstractCegarLoop]: Abstraction has has 89 places, 84 transitions, 182 flow [2021-11-09 09:32:40,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:40,911 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:32:40,911 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:40,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 09:32:40,912 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:32:40,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:40,912 INFO L85 PathProgramCache]: Analyzing trace with hash 2020520326, now seen corresponding path program 1 times [2021-11-09 09:32:40,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:40,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855380002] [2021-11-09 09:32:40,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:40,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:40,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:41,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:41,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:41,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855380002] [2021-11-09 09:32:41,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855380002] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:41,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640388001] [2021-11-09 09:32:41,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:41,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:41,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:41,076 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:41,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:32:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:41,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 09:32:41,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:41,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:41,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640388001] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:41,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:32:41,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-11-09 09:32:41,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192652829] [2021-11-09 09:32:41,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:32:41,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:41,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:32:41,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:32:41,501 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 09:32:41,502 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 84 transitions, 182 flow. Second operand has 7 states, 7 states have (on average 78.71428571428571) internal successors, (551), 7 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:41,503 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:32:41,503 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 09:32:41,503 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:32:41,600 INFO L129 PetriNetUnfolder]: 3/96 cut-off events. [2021-11-09 09:32:41,601 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-11-09 09:32:41,605 INFO L84 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 96 events. 3/96 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 60 event pairs, 0 based on Foata normal form. 1/94 useless extension candidates. Maximal degree in co-relation 121. Up to 7 conditions per place. [2021-11-09 09:32:41,607 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 10 selfloop transitions, 5 changer transitions 0/90 dead transitions. [2021-11-09 09:32:41,607 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 90 transitions, 226 flow [2021-11-09 09:32:41,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:32:41,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-09 09:32:41,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 478 transitions. [2021-11-09 09:32:41,619 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8851851851851852 [2021-11-09 09:32:41,619 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 478 transitions. [2021-11-09 09:32:41,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 478 transitions. [2021-11-09 09:32:41,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:32:41,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 478 transitions. [2021-11-09 09:32:41,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.66666666666667) internal successors, (478), 6 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:41,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 90.0) internal successors, (630), 7 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:41,628 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 90.0) internal successors, (630), 7 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:41,628 INFO L186 Difference]: Start difference. First operand has 89 places, 84 transitions, 182 flow. Second operand 6 states and 478 transitions. [2021-11-09 09:32:41,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 90 transitions, 226 flow [2021-11-09 09:32:41,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 90 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-11-09 09:32:41,633 INFO L242 Difference]: Finished difference. Result has 96 places, 87 transitions, 212 flow [2021-11-09 09:32:41,634 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=212, PETRI_PLACES=96, PETRI_TRANSITIONS=87} [2021-11-09 09:32:41,634 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 8 predicate places. [2021-11-09 09:32:41,635 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 87 transitions, 212 flow [2021-11-09 09:32:41,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 78.71428571428571) internal successors, (551), 7 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:41,636 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:32:41,636 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:41,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:41,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-09 09:32:41,862 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:32:41,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:41,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1122522151, now seen corresponding path program 2 times [2021-11-09 09:32:41,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:41,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893910341] [2021-11-09 09:32:41,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:41,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:41,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:42,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:42,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:42,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893910341] [2021-11-09 09:32:42,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893910341] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:42,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338129384] [2021-11-09 09:32:42,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:32:42,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:42,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:42,025 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:42,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:32:42,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:32:42,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:32:42,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 09:32:42,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:42,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:42,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338129384] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:42,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:32:42,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-09 09:32:42,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511148516] [2021-11-09 09:32:42,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 09:32:42,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:42,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 09:32:42,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:32:42,476 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 09:32:42,478 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 87 transitions, 212 flow. Second operand has 9 states, 9 states have (on average 78.77777777777777) internal successors, (709), 9 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:42,478 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:32:42,479 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 09:32:42,479 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:32:42,609 INFO L129 PetriNetUnfolder]: 3/103 cut-off events. [2021-11-09 09:32:42,609 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-11-09 09:32:42,612 INFO L84 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 103 events. 3/103 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 60 event pairs, 0 based on Foata normal form. 1/101 useless extension candidates. Maximal degree in co-relation 148. Up to 7 conditions per place. [2021-11-09 09:32:42,613 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 11 selfloop transitions, 8 changer transitions 0/94 dead transitions. [2021-11-09 09:32:42,614 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 94 transitions, 274 flow [2021-11-09 09:32:42,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 09:32:42,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-09 09:32:42,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 713 transitions. [2021-11-09 09:32:42,619 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8802469135802469 [2021-11-09 09:32:42,619 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 713 transitions. [2021-11-09 09:32:42,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 713 transitions. [2021-11-09 09:32:42,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:32:42,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 713 transitions. [2021-11-09 09:32:42,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 79.22222222222223) internal successors, (713), 9 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:42,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 90.0) internal successors, (900), 10 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:42,633 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 90.0) internal successors, (900), 10 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:42,633 INFO L186 Difference]: Start difference. First operand has 96 places, 87 transitions, 212 flow. Second operand 9 states and 713 transitions. [2021-11-09 09:32:42,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 94 transitions, 274 flow [2021-11-09 09:32:42,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 94 transitions, 268 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-11-09 09:32:42,646 INFO L242 Difference]: Finished difference. Result has 105 places, 90 transitions, 250 flow [2021-11-09 09:32:42,647 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=250, PETRI_PLACES=105, PETRI_TRANSITIONS=90} [2021-11-09 09:32:42,647 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 17 predicate places. [2021-11-09 09:32:42,647 INFO L470 AbstractCegarLoop]: Abstraction has has 105 places, 90 transitions, 250 flow [2021-11-09 09:32:42,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 78.77777777777777) internal successors, (709), 9 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:42,650 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:32:42,650 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:42,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:42,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:42,868 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:32:42,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:42,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1095871078, now seen corresponding path program 3 times [2021-11-09 09:32:42,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:42,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432212394] [2021-11-09 09:32:42,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:42,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:42,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:43,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:43,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432212394] [2021-11-09 09:32:43,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432212394] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:43,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857694864] [2021-11-09 09:32:43,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:32:43,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:43,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:43,047 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:43,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:32:43,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 09:32:43,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:32:43,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 09:32:43,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:43,498 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:43,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857694864] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:43,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:32:43,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-11-09 09:32:43,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081097227] [2021-11-09 09:32:43,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 09:32:43,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:43,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 09:32:43,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:32:43,505 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 09:32:43,507 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 90 transitions, 250 flow. Second operand has 11 states, 11 states have (on average 78.81818181818181) internal successors, (867), 11 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:43,507 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:32:43,507 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 09:32:43,507 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:32:43,664 INFO L129 PetriNetUnfolder]: 3/110 cut-off events. [2021-11-09 09:32:43,664 INFO L130 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2021-11-09 09:32:43,666 INFO L84 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 110 events. 3/110 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 60 event pairs, 0 based on Foata normal form. 1/108 useless extension candidates. Maximal degree in co-relation 179. Up to 7 conditions per place. [2021-11-09 09:32:43,667 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 12 selfloop transitions, 11 changer transitions 0/98 dead transitions. [2021-11-09 09:32:43,668 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 98 transitions, 330 flow [2021-11-09 09:32:43,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 09:32:43,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-11-09 09:32:43,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 948 transitions. [2021-11-09 09:32:43,675 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8777777777777778 [2021-11-09 09:32:43,675 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 948 transitions. [2021-11-09 09:32:43,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 948 transitions. [2021-11-09 09:32:43,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:32:43,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 948 transitions. [2021-11-09 09:32:43,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 79.0) internal successors, (948), 12 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) [2021-11-09 09:32:43,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 90.0) internal successors, (1170), 13 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:43,688 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 90.0) internal successors, (1170), 13 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:43,688 INFO L186 Difference]: Start difference. First operand has 105 places, 90 transitions, 250 flow. Second operand 12 states and 948 transitions. [2021-11-09 09:32:43,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 98 transitions, 330 flow [2021-11-09 09:32:43,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 98 transitions, 312 flow, removed 4 selfloop flow, removed 5 redundant places. [2021-11-09 09:32:43,704 INFO L242 Difference]: Finished difference. Result has 114 places, 93 transitions, 288 flow [2021-11-09 09:32:43,707 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=288, PETRI_PLACES=114, PETRI_TRANSITIONS=93} [2021-11-09 09:32:43,708 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 26 predicate places. [2021-11-09 09:32:43,708 INFO L470 AbstractCegarLoop]: Abstraction has has 114 places, 93 transitions, 288 flow [2021-11-09 09:32:43,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 78.81818181818181) internal successors, (867), 11 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:43,710 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:32:43,710 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:43,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:43,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:43,928 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:32:43,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:43,929 INFO L85 PathProgramCache]: Analyzing trace with hash 541433671, now seen corresponding path program 4 times [2021-11-09 09:32:43,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:43,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780115063] [2021-11-09 09:32:43,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:43,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:44,093 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:44,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:44,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780115063] [2021-11-09 09:32:44,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780115063] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:44,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799797422] [2021-11-09 09:32:44,094 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:32:44,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:44,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:44,097 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:44,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 09:32:44,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:32:44,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:32:44,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 09:32:44,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:45,616 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 11 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:45,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799797422] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:45,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:32:45,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 27 [2021-11-09 09:32:45,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312195991] [2021-11-09 09:32:45,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 09:32:45,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:45,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 09:32:45,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-11-09 09:32:45,625 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 90 [2021-11-09 09:32:45,628 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 93 transitions, 288 flow. Second operand has 27 states, 27 states have (on average 59.407407407407405) internal successors, (1604), 27 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:45,628 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:32:45,629 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 90 [2021-11-09 09:32:45,629 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:32:48,875 INFO L129 PetriNetUnfolder]: 685/1417 cut-off events. [2021-11-09 09:32:48,875 INFO L130 PetriNetUnfolder]: For 474/474 co-relation queries the response was YES. [2021-11-09 09:32:48,884 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2892 conditions, 1417 events. 685/1417 cut-off events. For 474/474 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 6691 event pairs, 2 based on Foata normal form. 7/1357 useless extension candidates. Maximal degree in co-relation 2878. Up to 342 conditions per place. [2021-11-09 09:32:48,901 INFO L132 encePairwiseOnDemand]: 71/90 looper letters, 189 selfloop transitions, 158 changer transitions 11/405 dead transitions. [2021-11-09 09:32:48,902 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 405 transitions, 1997 flow [2021-11-09 09:32:48,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-09 09:32:48,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-11-09 09:32:48,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 4444 transitions. [2021-11-09 09:32:48,925 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6764079147640791 [2021-11-09 09:32:48,925 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 4444 transitions. [2021-11-09 09:32:48,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 4444 transitions. [2021-11-09 09:32:48,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:32:48,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 4444 transitions. [2021-11-09 09:32:48,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 60.87671232876713) internal successors, (4444), 73 states have internal predecessors, (4444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:48,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 90.0) internal successors, (6660), 74 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:48,982 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 90.0) internal successors, (6660), 74 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:48,982 INFO L186 Difference]: Start difference. First operand has 114 places, 93 transitions, 288 flow. Second operand 73 states and 4444 transitions. [2021-11-09 09:32:48,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 405 transitions, 1997 flow [2021-11-09 09:32:48,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 405 transitions, 1883 flow, removed 28 selfloop flow, removed 8 redundant places. [2021-11-09 09:32:49,008 INFO L242 Difference]: Finished difference. Result has 216 places, 260 transitions, 1448 flow [2021-11-09 09:32:49,009 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=1448, PETRI_PLACES=216, PETRI_TRANSITIONS=260} [2021-11-09 09:32:49,010 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 128 predicate places. [2021-11-09 09:32:49,010 INFO L470 AbstractCegarLoop]: Abstraction has has 216 places, 260 transitions, 1448 flow [2021-11-09 09:32:49,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 59.407407407407405) internal successors, (1604), 27 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:49,011 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:32:49,012 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:49,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-09 09:32:49,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:49,231 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:32:49,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:49,232 INFO L85 PathProgramCache]: Analyzing trace with hash 645980809, now seen corresponding path program 1 times [2021-11-09 09:32:49,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:49,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046078565] [2021-11-09 09:32:49,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:49,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:49,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:49,465 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:49,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:49,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046078565] [2021-11-09 09:32:49,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046078565] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:49,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840859115] [2021-11-09 09:32:49,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:49,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:49,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:49,468 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:49,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 09:32:49,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:49,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 09:32:49,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:50,091 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:50,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840859115] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:50,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:32:50,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-11-09 09:32:50,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118188901] [2021-11-09 09:32:50,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 09:32:50,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:50,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 09:32:50,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:32:50,096 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 09:32:50,099 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 260 transitions, 1448 flow. Second operand has 15 states, 15 states have (on average 78.86666666666666) internal successors, (1183), 15 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:50,099 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:32:50,099 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 09:32:50,099 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:32:50,712 INFO L129 PetriNetUnfolder]: 365/1110 cut-off events. [2021-11-09 09:32:50,713 INFO L130 PetriNetUnfolder]: For 73499/73629 co-relation queries the response was YES. [2021-11-09 09:32:50,744 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8265 conditions, 1110 events. 365/1110 cut-off events. For 73499/73629 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 6089 event pairs, 53 based on Foata normal form. 48/1076 useless extension candidates. Maximal degree in co-relation 8213. Up to 259 conditions per place. [2021-11-09 09:32:50,778 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 14 selfloop transitions, 56 changer transitions 0/270 dead transitions. [2021-11-09 09:32:50,778 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 270 transitions, 1666 flow [2021-11-09 09:32:50,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 09:32:50,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-09 09:32:50,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1418 transitions. [2021-11-09 09:32:50,784 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8753086419753087 [2021-11-09 09:32:50,784 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1418 transitions. [2021-11-09 09:32:50,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1418 transitions. [2021-11-09 09:32:50,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:32:50,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1418 transitions. [2021-11-09 09:32:50,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 78.77777777777777) internal successors, (1418), 18 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:50,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 90.0) internal successors, (1710), 19 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:50,802 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 90.0) internal successors, (1710), 19 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:50,803 INFO L186 Difference]: Start difference. First operand has 216 places, 260 transitions, 1448 flow. Second operand 18 states and 1418 transitions. [2021-11-09 09:32:50,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 270 transitions, 1666 flow [2021-11-09 09:32:50,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 270 transitions, 1507 flow, removed 40 selfloop flow, removed 11 redundant places. [2021-11-09 09:32:51,006 INFO L242 Difference]: Finished difference. Result has 217 places, 263 transitions, 1471 flow [2021-11-09 09:32:51,011 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=1289, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1471, PETRI_PLACES=217, PETRI_TRANSITIONS=263} [2021-11-09 09:32:51,012 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 129 predicate places. [2021-11-09 09:32:51,012 INFO L470 AbstractCegarLoop]: Abstraction has has 217 places, 263 transitions, 1471 flow [2021-11-09 09:32:51,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 78.86666666666666) internal successors, (1183), 15 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:51,013 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:32:51,013 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:51,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:51,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-09 09:32:51,240 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:32:51,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:51,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1305512388, now seen corresponding path program 2 times [2021-11-09 09:32:51,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:51,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480372844] [2021-11-09 09:32:51,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:51,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:51,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:51,522 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:51,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:51,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480372844] [2021-11-09 09:32:51,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480372844] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:51,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589588142] [2021-11-09 09:32:51,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:32:51,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:51,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:51,525 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:51,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 09:32:51,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:32:51,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:32:51,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 09:32:51,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:52,125 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:52,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589588142] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:52,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:32:52,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-11-09 09:32:52,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224407746] [2021-11-09 09:32:52,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 09:32:52,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:52,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 09:32:52,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:32:52,134 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 09:32:52,137 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 263 transitions, 1471 flow. Second operand has 17 states, 17 states have (on average 78.88235294117646) internal successors, (1341), 17 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:52,137 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:32:52,137 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 09:32:52,137 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:32:52,764 INFO L129 PetriNetUnfolder]: 409/1187 cut-off events. [2021-11-09 09:32:52,764 INFO L130 PetriNetUnfolder]: For 84677/84820 co-relation queries the response was YES. [2021-11-09 09:32:52,865 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9476 conditions, 1187 events. 409/1187 cut-off events. For 84677/84820 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 6358 event pairs, 65 based on Foata normal form. 69/1165 useless extension candidates. Maximal degree in co-relation 9420. Up to 302 conditions per place. [2021-11-09 09:32:52,902 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 15 selfloop transitions, 59 changer transitions 0/274 dead transitions. [2021-11-09 09:32:52,902 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 274 transitions, 1707 flow [2021-11-09 09:32:52,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 09:32:52,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-11-09 09:32:52,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1653 transitions. [2021-11-09 09:32:52,906 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8746031746031746 [2021-11-09 09:32:52,906 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1653 transitions. [2021-11-09 09:32:52,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1653 transitions. [2021-11-09 09:32:52,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:32:52,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1653 transitions. [2021-11-09 09:32:52,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 78.71428571428571) internal successors, (1653), 21 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:52,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 90.0) internal successors, (1980), 22 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) [2021-11-09 09:32:52,919 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 90.0) internal successors, (1980), 22 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) [2021-11-09 09:32:52,920 INFO L186 Difference]: Start difference. First operand has 217 places, 263 transitions, 1471 flow. Second operand 21 states and 1653 transitions. [2021-11-09 09:32:52,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 274 transitions, 1707 flow [2021-11-09 09:32:53,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 274 transitions, 1574 flow, removed 19 selfloop flow, removed 13 redundant places. [2021-11-09 09:32:53,072 INFO L242 Difference]: Finished difference. Result has 227 places, 266 transitions, 1526 flow [2021-11-09 09:32:53,073 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=1338, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1526, PETRI_PLACES=227, PETRI_TRANSITIONS=266} [2021-11-09 09:32:53,074 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 139 predicate places. [2021-11-09 09:32:53,074 INFO L470 AbstractCegarLoop]: Abstraction has has 227 places, 266 transitions, 1526 flow [2021-11-09 09:32:53,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 78.88235294117646) internal successors, (1341), 17 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:53,075 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:32:53,075 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:53,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:53,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:53,298 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:32:53,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:53,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1913325353, now seen corresponding path program 3 times [2021-11-09 09:32:53,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:53,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732256617] [2021-11-09 09:32:53,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:53,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:53,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:53,522 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:53,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:53,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732256617] [2021-11-09 09:32:53,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732256617] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:53,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878413950] [2021-11-09 09:32:53,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:32:53,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:53,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:53,531 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:53,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 09:32:53,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-09 09:32:53,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:32:53,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 09:32:53,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:54,281 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:54,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878413950] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:54,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:32:54,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-11-09 09:32:54,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849868274] [2021-11-09 09:32:54,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 09:32:54,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:54,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 09:32:54,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:32:54,285 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 09:32:54,288 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 266 transitions, 1526 flow. Second operand has 19 states, 19 states have (on average 78.89473684210526) internal successors, (1499), 19 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:54,288 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:32:54,288 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 09:32:54,288 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:32:55,058 INFO L129 PetriNetUnfolder]: 456/1347 cut-off events. [2021-11-09 09:32:55,065 INFO L130 PetriNetUnfolder]: For 101824/101970 co-relation queries the response was YES. [2021-11-09 09:32:55,105 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11125 conditions, 1347 events. 456/1347 cut-off events. For 101824/101970 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 7362 event pairs, 77 based on Foata normal form. 49/1282 useless extension candidates. Maximal degree in co-relation 11066. Up to 358 conditions per place. [2021-11-09 09:32:55,145 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 16 selfloop transitions, 62 changer transitions 0/278 dead transitions. [2021-11-09 09:32:55,145 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 278 transitions, 1780 flow [2021-11-09 09:32:55,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 09:32:55,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-11-09 09:32:55,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1888 transitions. [2021-11-09 09:32:55,150 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8740740740740741 [2021-11-09 09:32:55,150 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1888 transitions. [2021-11-09 09:32:55,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1888 transitions. [2021-11-09 09:32:55,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:32:55,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1888 transitions. [2021-11-09 09:32:55,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 78.66666666666667) internal successors, (1888), 24 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:55,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 90.0) internal successors, (2250), 25 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:55,164 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 90.0) internal successors, (2250), 25 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:55,165 INFO L186 Difference]: Start difference. First operand has 227 places, 266 transitions, 1526 flow. Second operand 24 states and 1888 transitions. [2021-11-09 09:32:55,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 278 transitions, 1780 flow [2021-11-09 09:32:55,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 278 transitions, 1624 flow, removed 22 selfloop flow, removed 17 redundant places. [2021-11-09 09:32:55,289 INFO L242 Difference]: Finished difference. Result has 236 places, 269 transitions, 1570 flow [2021-11-09 09:32:55,290 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=1370, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1570, PETRI_PLACES=236, PETRI_TRANSITIONS=269} [2021-11-09 09:32:55,290 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 148 predicate places. [2021-11-09 09:32:55,290 INFO L470 AbstractCegarLoop]: Abstraction has has 236 places, 269 transitions, 1570 flow [2021-11-09 09:32:55,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 78.89473684210526) internal successors, (1499), 19 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:55,292 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:32:55,292 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:55,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:55,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:55,507 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:32:55,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:55,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1779560740, now seen corresponding path program 4 times [2021-11-09 09:32:55,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:55,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799927365] [2021-11-09 09:32:55,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:55,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:55,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:55,777 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:55,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:55,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799927365] [2021-11-09 09:32:55,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799927365] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:55,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897827680] [2021-11-09 09:32:55,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:32:55,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:55,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:55,783 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:55,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 09:32:56,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:32:56,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:32:56,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 09:32:56,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:58,666 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 117 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:58,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897827680] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:58,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:32:58,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 31] total 48 [2021-11-09 09:32:58,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955653933] [2021-11-09 09:32:58,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-09 09:32:58,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:58,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-09 09:32:58,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=2021, Unknown=0, NotChecked=0, Total=2256 [2021-11-09 09:32:58,675 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 90 [2021-11-09 09:32:58,680 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 269 transitions, 1570 flow. Second operand has 48 states, 48 states have (on average 59.125) internal successors, (2838), 48 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) [2021-11-09 09:32:58,680 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:32:58,680 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 90 [2021-11-09 09:32:58,681 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:33:09,685 INFO L129 PetriNetUnfolder]: 1649/3544 cut-off events. [2021-11-09 09:33:09,685 INFO L130 PetriNetUnfolder]: For 310989/311405 co-relation queries the response was YES. [2021-11-09 09:33:09,735 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31770 conditions, 3544 events. 1649/3544 cut-off events. For 310989/311405 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 21074 event pairs, 0 based on Foata normal form. 176/3528 useless extension candidates. Maximal degree in co-relation 31708. Up to 917 conditions per place. [2021-11-09 09:33:09,835 INFO L132 encePairwiseOnDemand]: 71/90 looper letters, 343 selfloop transitions, 541 changer transitions 0/931 dead transitions. [2021-11-09 09:33:09,836 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 931 transitions, 14911 flow [2021-11-09 09:33:09,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2021-11-09 09:33:09,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2021-11-09 09:33:09,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 11185 transitions. [2021-11-09 09:33:09,861 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6681600955794504 [2021-11-09 09:33:09,862 INFO L72 ComplementDD]: Start complementDD. Operand 186 states and 11185 transitions. [2021-11-09 09:33:09,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 186 states and 11185 transitions. [2021-11-09 09:33:09,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:33:09,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 186 states and 11185 transitions. [2021-11-09 09:33:09,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 187 states, 186 states have (on average 60.134408602150536) internal successors, (11185), 186 states have internal predecessors, (11185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:09,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 187 states, 187 states have (on average 90.0) internal successors, (16830), 187 states have internal predecessors, (16830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:09,944 INFO L81 ComplementDD]: Finished complementDD. Result has 187 states, 187 states have (on average 90.0) internal successors, (16830), 187 states have internal predecessors, (16830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:09,945 INFO L186 Difference]: Start difference. First operand has 236 places, 269 transitions, 1570 flow. Second operand 186 states and 11185 transitions. [2021-11-09 09:33:09,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 931 transitions, 14911 flow [2021-11-09 09:33:10,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 931 transitions, 14417 flow, removed 125 selfloop flow, removed 20 redundant places. [2021-11-09 09:33:10,840 INFO L242 Difference]: Finished difference. Result has 471 places, 689 transitions, 8650 flow [2021-11-09 09:33:10,841 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=1402, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=186, PETRI_FLOW=8650, PETRI_PLACES=471, PETRI_TRANSITIONS=689} [2021-11-09 09:33:10,841 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 383 predicate places. [2021-11-09 09:33:10,841 INFO L470 AbstractCegarLoop]: Abstraction has has 471 places, 689 transitions, 8650 flow [2021-11-09 09:33:10,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 59.125) internal successors, (2838), 48 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) [2021-11-09 09:33:10,842 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:33:10,843 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:10,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-09 09:33:11,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 09:33:11,044 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:33:11,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:11,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1747839863, now seen corresponding path program 1 times [2021-11-09 09:33:11,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:11,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087344778] [2021-11-09 09:33:11,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:11,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:11,345 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:11,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:11,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087344778] [2021-11-09 09:33:11,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087344778] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:11,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132243266] [2021-11-09 09:33:11,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:11,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:11,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:11,347 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:11,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 09:33:11,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:11,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:33:11,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:12,037 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:12,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132243266] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:12,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:33:12,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-11-09 09:33:12,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574124390] [2021-11-09 09:33:12,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 09:33:12,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:12,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 09:33:12,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:33:12,043 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 09:33:12,046 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 689 transitions, 8650 flow. Second operand has 23 states, 23 states have (on average 78.91304347826087) internal successors, (1815), 23 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:12,046 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:33:12,046 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 09:33:12,046 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:33:13,924 INFO L129 PetriNetUnfolder]: 1088/2847 cut-off events. [2021-11-09 09:33:13,924 INFO L130 PetriNetUnfolder]: For 1359521/1359850 co-relation queries the response was YES. [2021-11-09 09:33:14,004 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49710 conditions, 2847 events. 1088/2847 cut-off events. For 1359521/1359850 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 17808 event pairs, 12 based on Foata normal form. 23/2687 useless extension candidates. Maximal degree in co-relation 49578. Up to 752 conditions per place. [2021-11-09 09:33:14,258 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 18 selfloop transitions, 155 changer transitions 0/703 dead transitions. [2021-11-09 09:33:14,258 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 703 transitions, 9146 flow [2021-11-09 09:33:14,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 09:33:14,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-11-09 09:33:14,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2358 transitions. [2021-11-09 09:33:14,271 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8733333333333333 [2021-11-09 09:33:14,271 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2358 transitions. [2021-11-09 09:33:14,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2358 transitions. [2021-11-09 09:33:14,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:33:14,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2358 transitions. [2021-11-09 09:33:14,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 78.6) internal successors, (2358), 30 states have internal predecessors, (2358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:14,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 90.0) internal successors, (2790), 31 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:14,288 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 90.0) internal successors, (2790), 31 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:14,289 INFO L186 Difference]: Start difference. First operand has 471 places, 689 transitions, 8650 flow. Second operand 30 states and 2358 transitions. [2021-11-09 09:33:14,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 703 transitions, 9146 flow [2021-11-09 09:33:17,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 703 transitions, 5138 flow, removed 1800 selfloop flow, removed 54 redundant places. [2021-11-09 09:33:17,105 INFO L242 Difference]: Finished difference. Result has 449 places, 692 transitions, 5072 flow [2021-11-09 09:33:17,106 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=4642, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=5072, PETRI_PLACES=449, PETRI_TRANSITIONS=692} [2021-11-09 09:33:17,107 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 361 predicate places. [2021-11-09 09:33:17,107 INFO L470 AbstractCegarLoop]: Abstraction has has 449 places, 692 transitions, 5072 flow [2021-11-09 09:33:17,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 78.91304347826087) internal successors, (1815), 23 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:17,108 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:33:17,108 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:17,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:17,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:17,326 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:33:17,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:17,327 INFO L85 PathProgramCache]: Analyzing trace with hash -366798908, now seen corresponding path program 2 times [2021-11-09 09:33:17,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:17,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797074873] [2021-11-09 09:33:17,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:17,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:17,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:17,586 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:17,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:17,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797074873] [2021-11-09 09:33:17,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797074873] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:17,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844298549] [2021-11-09 09:33:17,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:33:17,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:17,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:17,588 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:17,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 09:33:18,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:33:18,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:18,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 09:33:18,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:18,450 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:18,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844298549] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:18,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:33:18,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-11-09 09:33:18,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248323243] [2021-11-09 09:33:18,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 09:33:18,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:18,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 09:33:18,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-11-09 09:33:18,455 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 09:33:18,457 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 692 transitions, 5072 flow. Second operand has 25 states, 25 states have (on average 78.92) internal successors, (1973), 25 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:18,458 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:33:18,458 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 09:33:18,458 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:33:20,385 INFO L129 PetriNetUnfolder]: 1167/3083 cut-off events. [2021-11-09 09:33:20,386 INFO L130 PetriNetUnfolder]: For 1468851/1469300 co-relation queries the response was YES. [2021-11-09 09:33:20,486 INFO L84 FinitePrefix]: Finished finitePrefix Result has 50830 conditions, 3083 events. 1167/3083 cut-off events. For 1468851/1469300 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 19336 event pairs, 23 based on Foata normal form. 21/2886 useless extension candidates. Maximal degree in co-relation 50694. Up to 693 conditions per place. [2021-11-09 09:33:20,627 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 19 selfloop transitions, 158 changer transitions 0/707 dead transitions. [2021-11-09 09:33:20,627 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 707 transitions, 5586 flow [2021-11-09 09:33:20,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-09 09:33:20,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-11-09 09:33:20,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2593 transitions. [2021-11-09 09:33:20,632 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8730639730639731 [2021-11-09 09:33:20,633 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2593 transitions. [2021-11-09 09:33:20,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2593 transitions. [2021-11-09 09:33:20,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:33:20,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2593 transitions. [2021-11-09 09:33:20,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 78.57575757575758) internal successors, (2593), 33 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:20,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 90.0) internal successors, (3060), 34 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:20,647 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 90.0) internal successors, (3060), 34 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:20,648 INFO L186 Difference]: Start difference. First operand has 449 places, 692 transitions, 5072 flow. Second operand 33 states and 2593 transitions. [2021-11-09 09:33:20,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 707 transitions, 5586 flow [2021-11-09 09:33:24,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 707 transitions, 5216 flow, removed 40 selfloop flow, removed 25 redundant places. [2021-11-09 09:33:24,667 INFO L242 Difference]: Finished difference. Result has 459 places, 695 transitions, 5136 flow [2021-11-09 09:33:24,668 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=4702, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=5136, PETRI_PLACES=459, PETRI_TRANSITIONS=695} [2021-11-09 09:33:24,669 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 371 predicate places. [2021-11-09 09:33:24,669 INFO L470 AbstractCegarLoop]: Abstraction has has 459 places, 695 transitions, 5136 flow [2021-11-09 09:33:24,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 78.92) internal successors, (1973), 25 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:24,670 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:33:24,671 INFO L254 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:24,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:24,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-09 09:33:24,899 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:33:24,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:24,900 INFO L85 PathProgramCache]: Analyzing trace with hash 522062889, now seen corresponding path program 3 times [2021-11-09 09:33:24,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:24,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898496555] [2021-11-09 09:33:24,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:24,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:24,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:25,294 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:25,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:25,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898496555] [2021-11-09 09:33:25,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898496555] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:25,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871565879] [2021-11-09 09:33:25,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:33:25,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:25,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:25,300 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:25,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 09:33:25,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-09 09:33:25,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:25,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 09:33:25,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:26,266 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:26,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871565879] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:26,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:33:26,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-11-09 09:33:26,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483884716] [2021-11-09 09:33:26,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 09:33:26,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:26,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 09:33:26,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2021-11-09 09:33:26,270 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 09:33:26,275 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 695 transitions, 5136 flow. Second operand has 27 states, 27 states have (on average 78.92592592592592) internal successors, (2131), 27 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:26,275 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:33:26,276 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 09:33:26,276 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:33:28,349 INFO L129 PetriNetUnfolder]: 1235/3143 cut-off events. [2021-11-09 09:33:28,349 INFO L130 PetriNetUnfolder]: For 1585288/1585819 co-relation queries the response was YES. [2021-11-09 09:33:28,466 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54782 conditions, 3143 events. 1235/3143 cut-off events. For 1585288/1585819 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 19112 event pairs, 31 based on Foata normal form. 21/2936 useless extension candidates. Maximal degree in co-relation 54643. Up to 750 conditions per place. [2021-11-09 09:33:28,557 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 20 selfloop transitions, 161 changer transitions 0/711 dead transitions. [2021-11-09 09:33:28,557 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 711 transitions, 5668 flow [2021-11-09 09:33:28,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-09 09:33:28,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-09 09:33:28,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2828 transitions. [2021-11-09 09:33:28,563 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8728395061728395 [2021-11-09 09:33:28,563 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2828 transitions. [2021-11-09 09:33:28,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2828 transitions. [2021-11-09 09:33:28,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:33:28,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2828 transitions. [2021-11-09 09:33:28,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 78.55555555555556) internal successors, (2828), 36 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:28,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 90.0) internal successors, (3330), 37 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:28,579 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 90.0) internal successors, (3330), 37 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:28,579 INFO L186 Difference]: Start difference. First operand has 459 places, 695 transitions, 5136 flow. Second operand 36 states and 2828 transitions. [2021-11-09 09:33:28,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 711 transitions, 5668 flow [2021-11-09 09:33:32,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 711 transitions, 5272 flow, removed 43 selfloop flow, removed 29 redundant places. [2021-11-09 09:33:32,583 INFO L242 Difference]: Finished difference. Result has 468 places, 698 transitions, 5186 flow [2021-11-09 09:33:32,584 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=4740, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=5186, PETRI_PLACES=468, PETRI_TRANSITIONS=698} [2021-11-09 09:33:32,584 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 380 predicate places. [2021-11-09 09:33:32,584 INFO L470 AbstractCegarLoop]: Abstraction has has 468 places, 698 transitions, 5186 flow [2021-11-09 09:33:32,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 78.92592592592592) internal successors, (2131), 27 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:32,585 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:33:32,585 INFO L254 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:32,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:32,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-09 09:33:32,799 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:33:32,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:32,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1609652580, now seen corresponding path program 4 times [2021-11-09 09:33:32,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:32,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370245310] [2021-11-09 09:33:32,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:32,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:32,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:33,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:33,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370245310] [2021-11-09 09:33:33,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370245310] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:33,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463354610] [2021-11-09 09:33:33,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:33:33,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:33,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:33,159 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:33,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 09:33:33,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:33:33,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:33,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-09 09:33:33,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:36,485 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 335 proven. 139 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:36,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463354610] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:36,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:33:36,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 43] total 68 [2021-11-09 09:33:36,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484833602] [2021-11-09 09:33:36,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-09 09:33:36,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:36,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-09 09:33:36,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=472, Invalid=4084, Unknown=0, NotChecked=0, Total=4556 [2021-11-09 09:33:36,494 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 90 [2021-11-09 09:33:36,498 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 698 transitions, 5186 flow. Second operand has 68 states, 68 states have (on average 59.029411764705884) internal successors, (4014), 68 states have internal predecessors, (4014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:36,498 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:33:36,498 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 90 [2021-11-09 09:33:36,498 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:33:47,894 INFO L129 PetriNetUnfolder]: 2883/5915 cut-off events. [2021-11-09 09:33:47,895 INFO L130 PetriNetUnfolder]: For 3622519/3623964 co-relation queries the response was YES. [2021-11-09 09:33:48,007 INFO L84 FinitePrefix]: Finished finitePrefix Result has 116319 conditions, 5915 events. 2883/5915 cut-off events. For 3622519/3623964 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 36225 event pairs, 35 based on Foata normal form. 318/5913 useless extension candidates. Maximal degree in co-relation 116177. Up to 1478 conditions per place. [2021-11-09 09:33:48,287 INFO L132 encePairwiseOnDemand]: 71/90 looper letters, 974 selfloop transitions, 555 changer transitions 0/1576 dead transitions. [2021-11-09 09:33:48,288 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 662 places, 1576 transitions, 47809 flow [2021-11-09 09:33:48,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2021-11-09 09:33:48,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2021-11-09 09:33:48,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 11750 transitions. [2021-11-09 09:33:48,313 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6695156695156695 [2021-11-09 09:33:48,314 INFO L72 ComplementDD]: Start complementDD. Operand 195 states and 11750 transitions. [2021-11-09 09:33:48,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 195 states and 11750 transitions. [2021-11-09 09:33:48,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:33:48,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 195 states and 11750 transitions. [2021-11-09 09:33:48,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 196 states, 195 states have (on average 60.256410256410255) internal successors, (11750), 195 states have internal predecessors, (11750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:48,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 196 states, 196 states have (on average 90.0) internal successors, (17640), 196 states have internal predecessors, (17640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:48,373 INFO L81 ComplementDD]: Finished complementDD. Result has 196 states, 196 states have (on average 90.0) internal successors, (17640), 196 states have internal predecessors, (17640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:48,374 INFO L186 Difference]: Start difference. First operand has 468 places, 698 transitions, 5186 flow. Second operand 195 states and 11750 transitions. [2021-11-09 09:33:48,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 662 places, 1576 transitions, 47809 flow [2021-11-09 09:33:55,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 630 places, 1576 transitions, 46939 flow, removed 184 selfloop flow, removed 32 redundant places. [2021-11-09 09:33:55,793 INFO L242 Difference]: Finished difference. Result has 735 places, 1118 transitions, 22687 flow [2021-11-09 09:33:55,795 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=4778, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=195, PETRI_FLOW=22687, PETRI_PLACES=735, PETRI_TRANSITIONS=1118} [2021-11-09 09:33:55,795 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 647 predicate places. [2021-11-09 09:33:55,795 INFO L470 AbstractCegarLoop]: Abstraction has has 735 places, 1118 transitions, 22687 flow [2021-11-09 09:33:55,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 59.029411764705884) internal successors, (4014), 68 states have internal predecessors, (4014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:55,796 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:33:55,796 INFO L254 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:55,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:55,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 09:33:55,997 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:33:55,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:55,997 INFO L85 PathProgramCache]: Analyzing trace with hash -254102967, now seen corresponding path program 5 times [2021-11-09 09:33:55,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:55,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880600712] [2021-11-09 09:33:55,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:55,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:56,487 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 559 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:56,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:56,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880600712] [2021-11-09 09:33:56,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880600712] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:56,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769949678] [2021-11-09 09:33:56,488 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:33:56,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:56,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:56,490 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:56,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 09:33:57,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-11-09 09:33:57,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:57,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-09 09:33:57,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:57,720 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 559 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:57,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769949678] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:57,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:33:57,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-11-09 09:33:57,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201504227] [2021-11-09 09:33:57,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 09:33:57,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:57,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 09:33:57,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-11-09 09:33:57,724 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 09:33:57,725 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 735 places, 1118 transitions, 22687 flow. Second operand has 31 states, 31 states have (on average 78.93548387096774) internal successors, (2447), 31 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:57,726 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:33:57,726 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 09:33:57,726 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:34:03,591 INFO L129 PetriNetUnfolder]: 1888/4851 cut-off events. [2021-11-09 09:34:03,591 INFO L130 PetriNetUnfolder]: For 9193484/9194975 co-relation queries the response was YES. [2021-11-09 09:34:03,881 INFO L84 FinitePrefix]: Finished finitePrefix Result has 158458 conditions, 4851 events. 1888/4851 cut-off events. For 9193484/9194975 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 32450 event pairs, 56 based on Foata normal form. 25/4489 useless extension candidates. Maximal degree in co-relation 158211. Up to 1252 conditions per place. [2021-11-09 09:34:04,306 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 22 selfloop transitions, 278 changer transitions 0/1136 dead transitions. [2021-11-09 09:34:04,306 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 776 places, 1136 transitions, 23501 flow [2021-11-09 09:34:04,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-09 09:34:04,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-11-09 09:34:04,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3298 transitions. [2021-11-09 09:34:04,322 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8724867724867725 [2021-11-09 09:34:04,322 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3298 transitions. [2021-11-09 09:34:04,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3298 transitions. [2021-11-09 09:34:04,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:34:04,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3298 transitions. [2021-11-09 09:34:04,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 78.52380952380952) internal successors, (3298), 42 states have internal predecessors, (3298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:04,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 90.0) internal successors, (3870), 43 states have internal predecessors, (3870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:04,339 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 90.0) internal successors, (3870), 43 states have internal predecessors, (3870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:04,339 INFO L186 Difference]: Start difference. First operand has 735 places, 1118 transitions, 22687 flow. Second operand 42 states and 3298 transitions. [2021-11-09 09:34:04,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 776 places, 1136 transitions, 23501 flow [2021-11-09 09:34:52,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 765 places, 1136 transitions, 9151 flow, removed 7128 selfloop flow, removed 11 redundant places. [2021-11-09 09:34:52,212 INFO L242 Difference]: Finished difference. Result has 768 places, 1121 transitions, 9053 flow [2021-11-09 09:34:52,214 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=8337, PETRI_DIFFERENCE_MINUEND_PLACES=724, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=275, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=840, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=9053, PETRI_PLACES=768, PETRI_TRANSITIONS=1121} [2021-11-09 09:34:52,214 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 680 predicate places. [2021-11-09 09:34:52,214 INFO L470 AbstractCegarLoop]: Abstraction has has 768 places, 1121 transitions, 9053 flow [2021-11-09 09:34:52,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 78.93548387096774) internal successors, (2447), 31 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:52,216 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:34:52,216 INFO L254 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:52,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 09:34:52,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-09 09:34:52,431 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:34:52,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:52,432 INFO L85 PathProgramCache]: Analyzing trace with hash 337783618, now seen corresponding path program 6 times [2021-11-09 09:34:52,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:52,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239803429] [2021-11-09 09:34:52,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:52,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:52,969 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:52,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:52,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239803429] [2021-11-09 09:34:52,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239803429] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:52,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323660786] [2021-11-09 09:34:52,970 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:34:52,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:34:52,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:34:52,971 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:34:52,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 09:34:54,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-11-09 09:34:54,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:34:54,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 09:34:54,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:34:54,626 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:54,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323660786] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:54,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:34:54,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 33 [2021-11-09 09:34:54,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876904940] [2021-11-09 09:34:54,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-09 09:34:54,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:54,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-09 09:34:54,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 09:34:54,629 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 09:34:54,631 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 768 places, 1121 transitions, 9053 flow. Second operand has 33 states, 33 states have (on average 78.93939393939394) internal successors, (2605), 33 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:54,631 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:34:54,631 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 09:34:54,631 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:34:59,081 INFO L129 PetriNetUnfolder]: 1975/4877 cut-off events. [2021-11-09 09:34:59,081 INFO L130 PetriNetUnfolder]: For 9332136/9333284 co-relation queries the response was YES. [2021-11-09 09:34:59,503 INFO L84 FinitePrefix]: Finished finitePrefix Result has 159480 conditions, 4877 events. 1975/4877 cut-off events. For 9332136/9333284 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 31634 event pairs, 69 based on Foata normal form. 25/4507 useless extension candidates. Maximal degree in co-relation 159229. Up to 1230 conditions per place. [2021-11-09 09:34:59,786 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 23 selfloop transitions, 281 changer transitions 0/1140 dead transitions. [2021-11-09 09:34:59,786 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 812 places, 1140 transitions, 9885 flow [2021-11-09 09:34:59,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-09 09:34:59,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-11-09 09:34:59,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3533 transitions. [2021-11-09 09:34:59,792 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8723456790123457 [2021-11-09 09:34:59,793 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3533 transitions. [2021-11-09 09:34:59,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3533 transitions. [2021-11-09 09:34:59,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:34:59,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3533 transitions. [2021-11-09 09:34:59,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 78.5111111111111) internal successors, (3533), 45 states have internal predecessors, (3533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:59,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 90.0) internal successors, (4140), 46 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:59,809 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 90.0) internal successors, (4140), 46 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:34:59,809 INFO L186 Difference]: Start difference. First operand has 768 places, 1121 transitions, 9053 flow. Second operand 45 states and 3533 transitions. [2021-11-09 09:34:59,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 812 places, 1140 transitions, 9885 flow [2021-11-09 09:35:51,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 775 places, 1140 transitions, 9230 flow, removed 58 selfloop flow, removed 37 redundant places. [2021-11-09 09:35:51,821 INFO L242 Difference]: Finished difference. Result has 778 places, 1124 transitions, 9120 flow [2021-11-09 09:35:51,822 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=8398, PETRI_DIFFERENCE_MINUEND_PLACES=731, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=840, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=9120, PETRI_PLACES=778, PETRI_TRANSITIONS=1124} [2021-11-09 09:35:51,822 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 690 predicate places. [2021-11-09 09:35:51,822 INFO L470 AbstractCegarLoop]: Abstraction has has 778 places, 1124 transitions, 9120 flow [2021-11-09 09:35:51,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 78.93939393939394) internal successors, (2605), 33 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:35:51,823 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:35:51,823 INFO L254 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:35:51,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 09:35:52,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 09:35:52,024 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:35:52,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:52,024 INFO L85 PathProgramCache]: Analyzing trace with hash -377637117, now seen corresponding path program 7 times [2021-11-09 09:35:52,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:52,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347134517] [2021-11-09 09:35:52,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:52,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:52,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:52,589 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:35:52,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:52,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347134517] [2021-11-09 09:35:52,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347134517] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:35:52,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907304892] [2021-11-09 09:35:52,590 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:35:52,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:35:52,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:35:52,593 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:35:52,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 09:35:53,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:53,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-09 09:35:53,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:35:54,132 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:35:54,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907304892] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:35:54,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:35:54,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2021-11-09 09:35:54,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836536926] [2021-11-09 09:35:54,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-09 09:35:54,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:54,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-09 09:35:54,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 09:35:54,137 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 09:35:54,139 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 778 places, 1124 transitions, 9120 flow. Second operand has 35 states, 35 states have (on average 78.94285714285714) internal successors, (2763), 35 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:35:54,139 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:35:54,139 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 09:35:54,139 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:36:00,493 INFO L129 PetriNetUnfolder]: 2093/5286 cut-off events. [2021-11-09 09:36:00,493 INFO L130 PetriNetUnfolder]: For 10278664/10280237 co-relation queries the response was YES. [2021-11-09 09:36:01,056 INFO L84 FinitePrefix]: Finished finitePrefix Result has 173916 conditions, 5286 events. 2093/5286 cut-off events. For 10278664/10280237 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 34839 event pairs, 82 based on Foata normal form. 25/4855 useless extension candidates. Maximal degree in co-relation 173662. Up to 1348 conditions per place. [2021-11-09 09:36:01,315 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 24 selfloop transitions, 284 changer transitions 0/1144 dead transitions. [2021-11-09 09:36:01,315 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 825 places, 1144 transitions, 9970 flow [2021-11-09 09:36:01,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-09 09:36:01,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-11-09 09:36:01,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3768 transitions. [2021-11-09 09:36:01,319 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8722222222222222 [2021-11-09 09:36:01,319 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3768 transitions. [2021-11-09 09:36:01,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3768 transitions. [2021-11-09 09:36:01,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:36:01,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3768 transitions. [2021-11-09 09:36:01,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 78.5) internal successors, (3768), 48 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:01,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 90.0) internal successors, (4410), 49 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:01,333 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 90.0) internal successors, (4410), 49 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:01,333 INFO L186 Difference]: Start difference. First operand has 778 places, 1124 transitions, 9120 flow. Second operand 48 states and 3768 transitions. [2021-11-09 09:36:01,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 825 places, 1144 transitions, 9970 flow [2021-11-09 09:37:10,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 784 places, 1144 transitions, 9292 flow, removed 61 selfloop flow, removed 41 redundant places. [2021-11-09 09:37:10,768 INFO L242 Difference]: Finished difference. Result has 787 places, 1127 transitions, 9176 flow [2021-11-09 09:37:10,770 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=8442, PETRI_DIFFERENCE_MINUEND_PLACES=737, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=840, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=9176, PETRI_PLACES=787, PETRI_TRANSITIONS=1127} [2021-11-09 09:37:10,770 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 699 predicate places. [2021-11-09 09:37:10,771 INFO L470 AbstractCegarLoop]: Abstraction has has 787 places, 1127 transitions, 9176 flow [2021-11-09 09:37:10,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 78.94285714285714) internal successors, (2763), 35 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:10,771 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:37:10,772 INFO L254 CegarLoopForPetriNet]: trace histogram [16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:10,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:10,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 09:37:10,983 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:37:10,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:10,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1909233674, now seen corresponding path program 8 times [2021-11-09 09:37:10,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:10,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66443146] [2021-11-09 09:37:10,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:10,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:11,578 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 0 proven. 856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:11,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:11,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66443146] [2021-11-09 09:37:11,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66443146] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:11,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612260738] [2021-11-09 09:37:11,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:37:11,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:11,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:11,580 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:11,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 09:37:12,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:37:12,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:37:12,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-09 09:37:12,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:12,923 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 0 proven. 856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:12,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612260738] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:12,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:12,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-11-09 09:37:12,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120346166] [2021-11-09 09:37:12,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-09 09:37:12,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:12,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-09 09:37:12,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 09:37:12,929 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 09:37:12,932 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 787 places, 1127 transitions, 9176 flow. Second operand has 37 states, 37 states have (on average 78.94594594594595) internal successors, (2921), 37 states have internal predecessors, (2921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:12,932 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:37:12,932 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 09:37:12,933 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:37:17,673 INFO L129 PetriNetUnfolder]: 2182/5532 cut-off events. [2021-11-09 09:37:17,674 INFO L130 PetriNetUnfolder]: For 10966108/10968120 co-relation queries the response was YES. [2021-11-09 09:37:18,037 INFO L84 FinitePrefix]: Finished finitePrefix Result has 183543 conditions, 5532 events. 2182/5532 cut-off events. For 10966108/10968120 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 36494 event pairs, 95 based on Foata normal form. 25/5069 useless extension candidates. Maximal degree in co-relation 183286. Up to 1437 conditions per place. [2021-11-09 09:37:18,887 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 25 selfloop transitions, 287 changer transitions 0/1148 dead transitions. [2021-11-09 09:37:18,887 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 837 places, 1148 transitions, 10044 flow [2021-11-09 09:37:18,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-09 09:37:18,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-11-09 09:37:18,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 4003 transitions. [2021-11-09 09:37:18,904 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8721132897603486 [2021-11-09 09:37:18,904 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 4003 transitions. [2021-11-09 09:37:18,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 4003 transitions. [2021-11-09 09:37:18,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:37:18,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 4003 transitions. [2021-11-09 09:37:18,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 78.49019607843137) internal successors, (4003), 51 states have internal predecessors, (4003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:18,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 90.0) internal successors, (4680), 52 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:18,933 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 90.0) internal successors, (4680), 52 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:18,933 INFO L186 Difference]: Start difference. First operand has 787 places, 1127 transitions, 9176 flow. Second operand 51 states and 4003 transitions. [2021-11-09 09:37:18,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 837 places, 1148 transitions, 10044 flow [2021-11-09 09:38:29,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 793 places, 1148 transitions, 9354 flow, removed 64 selfloop flow, removed 44 redundant places. [2021-11-09 09:38:29,759 INFO L242 Difference]: Finished difference. Result has 796 places, 1130 transitions, 9232 flow [2021-11-09 09:38:29,761 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=8486, PETRI_DIFFERENCE_MINUEND_PLACES=743, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=840, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=9232, PETRI_PLACES=796, PETRI_TRANSITIONS=1130} [2021-11-09 09:38:29,762 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 708 predicate places. [2021-11-09 09:38:29,762 INFO L470 AbstractCegarLoop]: Abstraction has has 796 places, 1130 transitions, 9232 flow [2021-11-09 09:38:29,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 78.94594594594595) internal successors, (2921), 37 states have internal predecessors, (2921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:29,763 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:38:29,763 INFO L254 CegarLoopForPetriNet]: trace histogram [17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:29,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 09:38:29,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 09:38:29,965 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:38:29,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:29,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1431752995, now seen corresponding path program 9 times [2021-11-09 09:38:29,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:29,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018304632] [2021-11-09 09:38:29,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:29,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:30,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:30,529 INFO L134 CoverageAnalysis]: Checked inductivity of 969 backedges. 0 proven. 969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:30,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:30,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018304632] [2021-11-09 09:38:30,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018304632] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:30,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188540264] [2021-11-09 09:38:30,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:38:30,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:38:30,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:38:30,531 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:38:30,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 09:38:31,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-11-09 09:38:31,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:38:31,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-09 09:38:31,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:38:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 969 backedges. 0 proven. 969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:31,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188540264] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:31,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:38:31,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-11-09 09:38:31,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318539092] [2021-11-09 09:38:31,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-09 09:38:31,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:31,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-09 09:38:31,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 09:38:31,849 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 09:38:31,850 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 796 places, 1130 transitions, 9232 flow. Second operand has 39 states, 39 states have (on average 78.94871794871794) internal successors, (3079), 39 states have internal predecessors, (3079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:31,850 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:38:31,851 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 09:38:31,851 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:38:38,346 INFO L129 PetriNetUnfolder]: 2293/5847 cut-off events. [2021-11-09 09:38:38,346 INFO L130 PetriNetUnfolder]: For 11801646/11803916 co-relation queries the response was YES. [2021-11-09 09:38:38,749 INFO L84 FinitePrefix]: Finished finitePrefix Result has 196757 conditions, 5847 events. 2293/5847 cut-off events. For 11801646/11803916 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 38735 event pairs, 108 based on Foata normal form. 24/5337 useless extension candidates. Maximal degree in co-relation 196497. Up to 1548 conditions per place. [2021-11-09 09:38:39,189 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 26 selfloop transitions, 290 changer transitions 0/1152 dead transitions. [2021-11-09 09:38:39,190 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 849 places, 1152 transitions, 10118 flow [2021-11-09 09:38:39,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-09 09:38:39,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-11-09 09:38:39,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 4238 transitions. [2021-11-09 09:38:39,198 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8720164609053498 [2021-11-09 09:38:39,198 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 4238 transitions. [2021-11-09 09:38:39,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 4238 transitions. [2021-11-09 09:38:39,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:38:39,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 4238 transitions. [2021-11-09 09:38:39,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 78.48148148148148) internal successors, (4238), 54 states have internal predecessors, (4238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:39,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 90.0) internal successors, (4950), 55 states have internal predecessors, (4950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:39,214 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 90.0) internal successors, (4950), 55 states have internal predecessors, (4950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:39,214 INFO L186 Difference]: Start difference. First operand has 796 places, 1130 transitions, 9232 flow. Second operand 54 states and 4238 transitions. [2021-11-09 09:38:39,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 849 places, 1152 transitions, 10118 flow [2021-11-09 09:40:02,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 802 places, 1152 transitions, 9416 flow, removed 67 selfloop flow, removed 47 redundant places. [2021-11-09 09:40:02,736 INFO L242 Difference]: Finished difference. Result has 805 places, 1133 transitions, 9288 flow [2021-11-09 09:40:02,737 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=8530, PETRI_DIFFERENCE_MINUEND_PLACES=749, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=287, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=840, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=9288, PETRI_PLACES=805, PETRI_TRANSITIONS=1133} [2021-11-09 09:40:02,737 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 717 predicate places. [2021-11-09 09:40:02,738 INFO L470 AbstractCegarLoop]: Abstraction has has 805 places, 1133 transitions, 9288 flow [2021-11-09 09:40:02,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 78.94871794871794) internal successors, (3079), 39 states have internal predecessors, (3079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:02,738 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:40:02,738 INFO L254 CegarLoopForPetriNet]: trace histogram [18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:02,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 09:40:02,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:40:02,943 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 09:40:02,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:02,943 INFO L85 PathProgramCache]: Analyzing trace with hash 8348418, now seen corresponding path program 10 times [2021-11-09 09:40:02,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:02,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200929969] [2021-11-09 09:40:02,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:02,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:02,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:03,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:03,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:03,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200929969] [2021-11-09 09:40:03,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200929969] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:03,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611032942] [2021-11-09 09:40:03,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:40:03,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:40:03,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:40:03,675 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:40:03,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0740cb34-54f3-41e4-91d4-f134fff39d51/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 09:40:04,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:40:04,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:40:04,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-09 09:40:04,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:40:09,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 840 proven. 249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:09,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611032942] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:09,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:40:09,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 61] total 98 [2021-11-09 09:40:09,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130396692] [2021-11-09 09:40:09,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-11-09 09:40:09,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:09,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-11-09 09:40:09,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=949, Invalid=8557, Unknown=0, NotChecked=0, Total=9506 [2021-11-09 09:40:09,768 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 90 [2021-11-09 09:40:09,772 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 805 places, 1133 transitions, 9288 flow. Second operand has 98 states, 98 states have (on average 58.95918367346939) internal successors, (5778), 98 states have internal predecessors, (5778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:09,772 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:40:09,772 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 90 [2021-11-09 09:40:09,772 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:42:01,008 INFO L129 PetriNetUnfolder]: 8197/14831 cut-off events. [2021-11-09 09:42:01,008 INFO L130 PetriNetUnfolder]: For 42068689/42072965 co-relation queries the response was YES. [2021-11-09 09:42:02,101 INFO L84 FinitePrefix]: Finished finitePrefix Result has 645169 conditions, 14831 events. 8197/14831 cut-off events. For 42068689/42072965 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 88368 event pairs, 30 based on Foata normal form. 591/14957 useless extension candidates. Maximal degree in co-relation 644906. Up to 4634 conditions per place.