./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa --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 e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:12:52,355 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:12:52,357 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:12:52,389 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:12:52,389 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:12:52,390 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:12:52,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:12:52,393 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:12:52,394 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:12:52,395 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:12:52,396 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:12:52,397 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:12:52,397 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:12:52,398 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:12:52,399 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:12:52,400 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:12:52,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:12:52,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:12:52,403 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:12:52,405 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:12:52,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:12:52,408 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:12:52,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:12:52,409 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:12:52,412 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:12:52,412 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:12:52,413 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:12:52,413 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:12:52,414 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:12:52,414 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:12:52,415 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:12:52,415 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:12:52,416 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:12:52,417 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:12:52,418 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:12:52,418 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:12:52,418 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:12:52,418 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:12:52,419 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:12:52,419 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:12:52,420 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:12:52,420 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 18:12:52,443 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:12:52,443 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:12:52,443 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:12:52,443 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:12:52,444 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:12:52,444 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:12:52,445 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:12:52,445 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:12:52,445 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:12:52,445 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:12:52,445 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:12:52,445 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:12:52,445 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:12:52,446 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:12:52,446 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 18:12:52,446 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:12:52,446 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 18:12:52,446 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:12:52,446 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 18:12:52,446 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:12:52,447 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 18:12:52,447 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:12:52,447 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:12:52,447 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:12:52,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:12:52,447 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:12:52,447 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:12:52,447 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 18:12:52,447 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:12:52,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:12:52,448 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 18:12:52,448 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 18:12:52,448 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 18:12:52,448 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:12:52,448 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_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 [2021-12-06 18:12:52,652 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:12:52,670 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:12:52,672 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:12:52,673 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:12:52,673 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:12:52,674 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2021-12-06 18:12:52,715 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/data/a79a7dd36/0232d64f7cc84d5eae2cb9f0894e95e4/FLAG9569358d9 [2021-12-06 18:12:53,107 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:12:53,107 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2021-12-06 18:12:53,115 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/data/a79a7dd36/0232d64f7cc84d5eae2cb9f0894e95e4/FLAG9569358d9 [2021-12-06 18:12:53,124 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/data/a79a7dd36/0232d64f7cc84d5eae2cb9f0894e95e4 [2021-12-06 18:12:53,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:12:53,127 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:12:53,128 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:12:53,128 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:12:53,131 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:12:53,131 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:12:53" (1/1) ... [2021-12-06 18:12:53,132 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2158639e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:12:53, skipping insertion in model container [2021-12-06 18:12:53,132 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:12:53" (1/1) ... [2021-12-06 18:12:53,137 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:12:53,153 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:12:53,287 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c[3947,3960] [2021-12-06 18:12:53,294 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:12:53,299 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:12:53,320 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c[3947,3960] [2021-12-06 18:12:53,323 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:12:53,335 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:12:53,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:12:53 WrapperNode [2021-12-06 18:12:53,335 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:12:53,336 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:12:53,336 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:12:53,336 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:12:53,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:12:53" (1/1) ... [2021-12-06 18:12:53,352 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:12:53" (1/1) ... [2021-12-06 18:12:53,378 INFO L137 Inliner]: procedures = 25, calls = 61, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 315 [2021-12-06 18:12:53,379 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:12:53,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:12:53,379 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:12:53,379 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:12:53,385 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:12:53" (1/1) ... [2021-12-06 18:12:53,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:12:53" (1/1) ... [2021-12-06 18:12:53,389 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:12:53" (1/1) ... [2021-12-06 18:12:53,389 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:12:53" (1/1) ... [2021-12-06 18:12:53,397 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:12:53" (1/1) ... [2021-12-06 18:12:53,401 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:12:53" (1/1) ... [2021-12-06 18:12:53,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:12:53" (1/1) ... [2021-12-06 18:12:53,406 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:12:53,407 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:12:53,407 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:12:53,407 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:12:53,408 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:12:53" (1/1) ... [2021-12-06 18:12:53,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:12:53,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:12:53,445 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:12:53,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:12:53,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:12:53,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 18:12:53,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 18:12:53,484 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 18:12:53,485 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-06 18:12:53,485 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-06 18:12:53,485 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-06 18:12:53,485 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-06 18:12:53,485 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-12-06 18:12:53,485 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-12-06 18:12:53,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 18:12:53,485 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-06 18:12:53,486 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-06 18:12:53,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 18:12:53,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:12:53,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:12:53,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 18:12:53,488 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-06 18:12:53,574 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:12:53,575 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:12:53,849 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:12:53,931 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:12:53,931 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-06 18:12:53,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:12:53 BoogieIcfgContainer [2021-12-06 18:12:53,933 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:12:53,934 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:12:53,934 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:12:53,937 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:12:53,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:12:53" (1/3) ... [2021-12-06 18:12:53,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5001712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:12:53, skipping insertion in model container [2021-12-06 18:12:53,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:12:53" (2/3) ... [2021-12-06 18:12:53,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5001712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:12:53, skipping insertion in model container [2021-12-06 18:12:53,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:12:53" (3/3) ... [2021-12-06 18:12:53,939 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2021-12-06 18:12:53,943 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-06 18:12:53,943 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:12:53,943 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 18:12:53,943 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-06 18:12:53,971 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,971 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,971 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,971 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,971 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,971 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,972 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,972 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,972 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,972 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,972 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,972 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,972 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,972 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~short8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,973 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,973 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,973 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,973 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,973 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,973 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~short8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,973 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,973 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,974 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~short2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,974 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,974 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,974 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,974 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,974 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,974 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~short2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,974 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,974 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,975 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,975 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,975 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,975 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,975 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,975 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,975 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,976 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,976 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,976 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,976 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,976 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,976 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,976 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,976 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,976 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,976 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,977 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,977 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,977 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,977 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,977 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,977 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,977 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,977 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,977 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,977 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,978 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~s~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,978 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~s~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,978 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,978 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,978 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,978 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,978 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,979 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,979 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,979 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,979 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,979 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,979 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,979 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,979 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,979 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,979 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,979 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,980 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,980 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,980 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,980 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,980 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,980 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,980 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,980 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,981 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,981 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,981 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,981 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,981 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,981 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,981 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,981 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~s~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,982 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~s~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,982 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,982 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~s~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,982 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~s~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,982 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,982 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,982 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,982 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,983 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~t~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,983 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~t~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,983 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,983 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,983 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,983 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,983 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,983 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,983 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,983 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,984 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,984 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post16#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,984 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,984 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,984 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,984 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,984 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post16#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,984 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,984 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,984 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,984 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post19#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,985 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,985 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,985 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~short18#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,985 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,985 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,985 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,985 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post19#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,985 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,985 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,986 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~short18#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,986 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,986 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,986 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~t~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,986 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~t~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,986 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,986 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~t~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,986 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~t~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,997 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,997 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,997 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:53,998 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,000 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,000 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,001 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,001 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,001 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,001 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~s~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,001 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,001 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,001 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,001 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,002 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,002 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,003 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,003 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,003 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,003 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~short18#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,003 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post16#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,003 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,004 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,004 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,004 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post19#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,004 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~t~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,005 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,005 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~short2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,006 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,006 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~short8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,006 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,006 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,006 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,006 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,006 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,006 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,006 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,006 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,007 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,007 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,007 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 18:12:54,009 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-12-06 18:12:54,048 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:12:54,055 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 [2021-12-06 18:12:54,055 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-06 18:12:54,070 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 255 places, 267 transitions, 558 flow [2021-12-06 18:12:54,151 INFO L129 PetriNetUnfolder]: 22/264 cut-off events. [2021-12-06 18:12:54,152 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-06 18:12:54,156 INFO L84 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 264 events. 22/264 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 157 event pairs, 0 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 224. Up to 3 conditions per place. [2021-12-06 18:12:54,156 INFO L82 GeneralOperation]: Start removeDead. Operand has 255 places, 267 transitions, 558 flow [2021-12-06 18:12:54,163 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 241 places, 253 transitions, 524 flow [2021-12-06 18:12:54,193 INFO L129 PetriNetUnfolder]: 22/252 cut-off events. [2021-12-06 18:12:54,193 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-06 18:12:54,194 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:12:54,194 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:12:54,194 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 18:12:54,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:12:54,198 INFO L85 PathProgramCache]: Analyzing trace with hash 956219309, now seen corresponding path program 1 times [2021-12-06 18:12:54,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:12:54,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726410138] [2021-12-06 18:12:54,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:12:54,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:12:54,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:54,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:12:54,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:12:54,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726410138] [2021-12-06 18:12:54,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726410138] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:12:54,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:12:54,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:12:54,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170105491] [2021-12-06 18:12:54,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:12:54,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 18:12:54,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:12:54,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 18:12:54,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 18:12:54,450 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 267 [2021-12-06 18:12:54,454 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 253 transitions, 524 flow. Second operand has 2 states, 2 states have (on average 243.0) internal successors, (486), 2 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:54,454 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:12:54,454 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 267 [2021-12-06 18:12:54,456 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:12:54,603 INFO L129 PetriNetUnfolder]: 137/624 cut-off events. [2021-12-06 18:12:54,603 INFO L130 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2021-12-06 18:12:54,605 INFO L84 FinitePrefix]: Finished finitePrefix Result has 872 conditions, 624 events. 137/624 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2446 event pairs, 74 based on Foata normal form. 97/655 useless extension candidates. Maximal degree in co-relation 622. Up to 197 conditions per place. [2021-12-06 18:12:54,608 INFO L132 encePairwiseOnDemand]: 251/267 looper letters, 13 selfloop transitions, 0 changer transitions 8/237 dead transitions. [2021-12-06 18:12:54,609 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 237 transitions, 518 flow [2021-12-06 18:12:54,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 18:12:54,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-06 18:12:54,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 503 transitions. [2021-12-06 18:12:54,620 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9419475655430711 [2021-12-06 18:12:54,621 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 503 transitions. [2021-12-06 18:12:54,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 503 transitions. [2021-12-06 18:12:54,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:12:54,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 503 transitions. [2021-12-06 18:12:54,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 251.5) internal successors, (503), 2 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:54,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:54,634 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:54,635 INFO L186 Difference]: Start difference. First operand has 241 places, 253 transitions, 524 flow. Second operand 2 states and 503 transitions. [2021-12-06 18:12:54,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 237 transitions, 518 flow [2021-12-06 18:12:54,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 237 transitions, 506 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-12-06 18:12:54,643 INFO L242 Difference]: Finished difference. Result has 236 places, 229 transitions, 464 flow [2021-12-06 18:12:54,645 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=464, PETRI_PLACES=236, PETRI_TRANSITIONS=229} [2021-12-06 18:12:54,648 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, -5 predicate places. [2021-12-06 18:12:54,648 INFO L470 AbstractCegarLoop]: Abstraction has has 236 places, 229 transitions, 464 flow [2021-12-06 18:12:54,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 243.0) internal successors, (486), 2 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:54,649 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:12:54,649 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:12:54,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 18:12:54,649 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 18:12:54,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:12:54,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1907627099, now seen corresponding path program 1 times [2021-12-06 18:12:54,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:12:54,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796133136] [2021-12-06 18:12:54,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:12:54,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:12:54,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:54,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:12:54,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:12:54,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796133136] [2021-12-06 18:12:54,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796133136] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:12:54,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:12:54,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:12:54,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125357959] [2021-12-06 18:12:54,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:12:54,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:12:54,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:12:54,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:12:54,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:12:54,819 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 267 [2021-12-06 18:12:54,819 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 229 transitions, 464 flow. Second operand has 3 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:54,820 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:12:54,820 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 267 [2021-12-06 18:12:54,820 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:12:54,928 INFO L129 PetriNetUnfolder]: 125/535 cut-off events. [2021-12-06 18:12:54,928 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2021-12-06 18:12:54,930 INFO L84 FinitePrefix]: Finished finitePrefix Result has 748 conditions, 535 events. 125/535 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1784 event pairs, 29 based on Foata normal form. 10/511 useless extension candidates. Maximal degree in co-relation 745. Up to 142 conditions per place. [2021-12-06 18:12:54,933 INFO L132 encePairwiseOnDemand]: 264/267 looper letters, 22 selfloop transitions, 2 changer transitions 0/236 dead transitions. [2021-12-06 18:12:54,933 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 236 transitions, 528 flow [2021-12-06 18:12:54,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:12:54,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-06 18:12:54,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 724 transitions. [2021-12-06 18:12:54,938 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9038701622971286 [2021-12-06 18:12:54,938 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 724 transitions. [2021-12-06 18:12:54,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 724 transitions. [2021-12-06 18:12:54,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:12:54,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 724 transitions. [2021-12-06 18:12:54,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.33333333333334) internal successors, (724), 3 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:54,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:54,946 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:54,946 INFO L186 Difference]: Start difference. First operand has 236 places, 229 transitions, 464 flow. Second operand 3 states and 724 transitions. [2021-12-06 18:12:54,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 236 transitions, 528 flow [2021-12-06 18:12:54,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 236 transitions, 528 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-06 18:12:54,954 INFO L242 Difference]: Finished difference. Result has 231 places, 230 transitions, 476 flow [2021-12-06 18:12:54,954 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=476, PETRI_PLACES=231, PETRI_TRANSITIONS=230} [2021-12-06 18:12:54,955 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, -10 predicate places. [2021-12-06 18:12:54,955 INFO L470 AbstractCegarLoop]: Abstraction has has 231 places, 230 transitions, 476 flow [2021-12-06 18:12:54,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:54,956 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:12:54,957 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:12:54,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 18:12:54,957 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 18:12:54,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:12:54,958 INFO L85 PathProgramCache]: Analyzing trace with hash -104740663, now seen corresponding path program 2 times [2021-12-06 18:12:54,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:12:54,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332362482] [2021-12-06 18:12:54,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:12:54,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:12:55,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:55,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:12:55,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:12:55,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332362482] [2021-12-06 18:12:55,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332362482] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:12:55,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:12:55,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:12:55,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46058008] [2021-12-06 18:12:55,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:12:55,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:12:55,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:12:55,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:12:55,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:12:55,128 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 267 [2021-12-06 18:12:55,130 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 230 transitions, 476 flow. Second operand has 6 states, 6 states have (on average 205.16666666666666) internal successors, (1231), 6 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:55,130 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:12:55,130 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 267 [2021-12-06 18:12:55,130 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:12:55,307 INFO L129 PetriNetUnfolder]: 127/663 cut-off events. [2021-12-06 18:12:55,308 INFO L130 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2021-12-06 18:12:55,309 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 663 events. 127/663 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2130 event pairs, 67 based on Foata normal form. 8/630 useless extension candidates. Maximal degree in co-relation 1003. Up to 210 conditions per place. [2021-12-06 18:12:55,312 INFO L132 encePairwiseOnDemand]: 255/267 looper letters, 48 selfloop transitions, 8 changer transitions 28/262 dead transitions. [2021-12-06 18:12:55,312 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 262 transitions, 711 flow [2021-12-06 18:12:55,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:12:55,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-06 18:12:55,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1877 transitions. [2021-12-06 18:12:55,317 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7811069496462755 [2021-12-06 18:12:55,317 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1877 transitions. [2021-12-06 18:12:55,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1877 transitions. [2021-12-06 18:12:55,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:12:55,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1877 transitions. [2021-12-06 18:12:55,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 208.55555555555554) internal successors, (1877), 9 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:55,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:55,329 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:55,330 INFO L186 Difference]: Start difference. First operand has 231 places, 230 transitions, 476 flow. Second operand 9 states and 1877 transitions. [2021-12-06 18:12:55,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 262 transitions, 711 flow [2021-12-06 18:12:55,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 262 transitions, 709 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-06 18:12:55,335 INFO L242 Difference]: Finished difference. Result has 240 places, 231 transitions, 506 flow [2021-12-06 18:12:55,335 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=506, PETRI_PLACES=240, PETRI_TRANSITIONS=231} [2021-12-06 18:12:55,336 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, -1 predicate places. [2021-12-06 18:12:55,336 INFO L470 AbstractCegarLoop]: Abstraction has has 240 places, 231 transitions, 506 flow [2021-12-06 18:12:55,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 205.16666666666666) internal successors, (1231), 6 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:55,337 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:12:55,337 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:12:55,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 18:12:55,338 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 18:12:55,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:12:55,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1211723757, now seen corresponding path program 1 times [2021-12-06 18:12:55,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:12:55,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503549602] [2021-12-06 18:12:55,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:12:55,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:12:55,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:55,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:12:55,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:12:55,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503549602] [2021-12-06 18:12:55,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503549602] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:12:55,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:12:55,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:12:55,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319697079] [2021-12-06 18:12:55,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:12:55,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:12:55,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:12:55,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:12:55,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:12:55,442 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 267 [2021-12-06 18:12:55,443 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 231 transitions, 506 flow. Second operand has 5 states, 5 states have (on average 203.0) internal successors, (1015), 5 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:55,443 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:12:55,443 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 267 [2021-12-06 18:12:55,443 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:12:55,672 INFO L129 PetriNetUnfolder]: 245/864 cut-off events. [2021-12-06 18:12:55,672 INFO L130 PetriNetUnfolder]: For 198/198 co-relation queries the response was YES. [2021-12-06 18:12:55,675 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1573 conditions, 864 events. 245/864 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 4061 event pairs, 84 based on Foata normal form. 1/814 useless extension candidates. Maximal degree in co-relation 1566. Up to 226 conditions per place. [2021-12-06 18:12:55,680 INFO L132 encePairwiseOnDemand]: 262/267 looper letters, 57 selfloop transitions, 2 changer transitions 7/248 dead transitions. [2021-12-06 18:12:55,680 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 248 transitions, 689 flow [2021-12-06 18:12:55,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:12:55,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-06 18:12:55,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1035 transitions. [2021-12-06 18:12:55,684 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7752808988764045 [2021-12-06 18:12:55,684 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1035 transitions. [2021-12-06 18:12:55,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1035 transitions. [2021-12-06 18:12:55,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:12:55,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1035 transitions. [2021-12-06 18:12:55,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 207.0) internal successors, (1035), 5 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:55,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:55,692 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:55,692 INFO L186 Difference]: Start difference. First operand has 240 places, 231 transitions, 506 flow. Second operand 5 states and 1035 transitions. [2021-12-06 18:12:55,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 248 transitions, 689 flow [2021-12-06 18:12:55,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 248 transitions, 675 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-12-06 18:12:55,697 INFO L242 Difference]: Finished difference. Result has 240 places, 232 transitions, 508 flow [2021-12-06 18:12:55,697 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=508, PETRI_PLACES=240, PETRI_TRANSITIONS=232} [2021-12-06 18:12:55,698 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, -1 predicate places. [2021-12-06 18:12:55,698 INFO L470 AbstractCegarLoop]: Abstraction has has 240 places, 232 transitions, 508 flow [2021-12-06 18:12:55,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 203.0) internal successors, (1015), 5 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:55,699 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:12:55,700 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:12:55,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 18:12:55,700 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 18:12:55,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:12:55,700 INFO L85 PathProgramCache]: Analyzing trace with hash 856851245, now seen corresponding path program 1 times [2021-12-06 18:12:55,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:12:55,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441793898] [2021-12-06 18:12:55,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:12:55,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:12:55,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:55,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:12:55,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:12:55,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441793898] [2021-12-06 18:12:55,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441793898] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:12:55,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:12:55,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:12:55,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203141222] [2021-12-06 18:12:55,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:12:55,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:12:55,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:12:55,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:12:55,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:12:55,842 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 267 [2021-12-06 18:12:55,843 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 232 transitions, 508 flow. Second operand has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:55,843 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:12:55,843 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 267 [2021-12-06 18:12:55,843 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:12:55,974 INFO L129 PetriNetUnfolder]: 138/574 cut-off events. [2021-12-06 18:12:55,974 INFO L130 PetriNetUnfolder]: For 122/122 co-relation queries the response was YES. [2021-12-06 18:12:55,976 INFO L84 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 574 events. 138/574 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1964 event pairs, 50 based on Foata normal form. 11/555 useless extension candidates. Maximal degree in co-relation 972. Up to 128 conditions per place. [2021-12-06 18:12:55,979 INFO L132 encePairwiseOnDemand]: 262/267 looper letters, 22 selfloop transitions, 4 changer transitions 3/240 dead transitions. [2021-12-06 18:12:55,979 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 240 transitions, 594 flow [2021-12-06 18:12:55,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:12:55,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-06 18:12:55,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 719 transitions. [2021-12-06 18:12:55,982 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8976279650436954 [2021-12-06 18:12:55,982 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 719 transitions. [2021-12-06 18:12:55,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 719 transitions. [2021-12-06 18:12:55,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:12:55,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 719 transitions. [2021-12-06 18:12:55,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:55,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:55,989 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:55,989 INFO L186 Difference]: Start difference. First operand has 240 places, 232 transitions, 508 flow. Second operand 3 states and 719 transitions. [2021-12-06 18:12:55,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 240 transitions, 594 flow [2021-12-06 18:12:55,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 240 transitions, 588 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-12-06 18:12:55,996 INFO L242 Difference]: Finished difference. Result has 238 places, 233 transitions, 520 flow [2021-12-06 18:12:55,997 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=520, PETRI_PLACES=238, PETRI_TRANSITIONS=233} [2021-12-06 18:12:55,998 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, -3 predicate places. [2021-12-06 18:12:55,998 INFO L470 AbstractCegarLoop]: Abstraction has has 238 places, 233 transitions, 520 flow [2021-12-06 18:12:55,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:55,999 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:12:55,999 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:12:55,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 18:12:55,999 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 18:12:56,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:12:56,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1825376933, now seen corresponding path program 2 times [2021-12-06 18:12:56,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:12:56,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504478991] [2021-12-06 18:12:56,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:12:56,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:12:56,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:56,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:12:56,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:12:56,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504478991] [2021-12-06 18:12:56,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504478991] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:12:56,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:12:56,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:12:56,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113207687] [2021-12-06 18:12:56,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:12:56,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:12:56,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:12:56,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:12:56,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:12:56,143 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 267 [2021-12-06 18:12:56,144 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 233 transitions, 520 flow. Second operand has 6 states, 6 states have (on average 206.16666666666666) internal successors, (1237), 6 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:56,145 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:12:56,145 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 267 [2021-12-06 18:12:56,145 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:12:56,333 INFO L129 PetriNetUnfolder]: 188/776 cut-off events. [2021-12-06 18:12:56,333 INFO L130 PetriNetUnfolder]: For 179/179 co-relation queries the response was YES. [2021-12-06 18:12:56,335 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1443 conditions, 776 events. 188/776 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3202 event pairs, 121 based on Foata normal form. 9/741 useless extension candidates. Maximal degree in co-relation 1434. Up to 224 conditions per place. [2021-12-06 18:12:56,337 INFO L132 encePairwiseOnDemand]: 259/267 looper letters, 52 selfloop transitions, 6 changer transitions 12/249 dead transitions. [2021-12-06 18:12:56,337 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 249 transitions, 709 flow [2021-12-06 18:12:56,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:12:56,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-06 18:12:56,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1460 transitions. [2021-12-06 18:12:56,341 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7811663991439273 [2021-12-06 18:12:56,341 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1460 transitions. [2021-12-06 18:12:56,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1460 transitions. [2021-12-06 18:12:56,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:12:56,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1460 transitions. [2021-12-06 18:12:56,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 208.57142857142858) internal successors, (1460), 7 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:56,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 267.0) internal successors, (2136), 8 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:56,349 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 267.0) internal successors, (2136), 8 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:56,349 INFO L186 Difference]: Start difference. First operand has 238 places, 233 transitions, 520 flow. Second operand 7 states and 1460 transitions. [2021-12-06 18:12:56,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 249 transitions, 709 flow [2021-12-06 18:12:56,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 249 transitions, 705 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-06 18:12:56,355 INFO L242 Difference]: Finished difference. Result has 245 places, 234 transitions, 538 flow [2021-12-06 18:12:56,355 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=538, PETRI_PLACES=245, PETRI_TRANSITIONS=234} [2021-12-06 18:12:56,356 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 4 predicate places. [2021-12-06 18:12:56,356 INFO L470 AbstractCegarLoop]: Abstraction has has 245 places, 234 transitions, 538 flow [2021-12-06 18:12:56,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 206.16666666666666) internal successors, (1237), 6 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:56,356 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:12:56,357 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:12:56,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 18:12:56,357 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 18:12:56,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:12:56,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1044808093, now seen corresponding path program 1 times [2021-12-06 18:12:56,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:12:56,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712947389] [2021-12-06 18:12:56,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:12:56,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:12:56,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:56,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:12:56,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:12:56,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712947389] [2021-12-06 18:12:56,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712947389] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:12:56,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:12:56,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:12:56,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271844909] [2021-12-06 18:12:56,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:12:56,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:12:56,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:12:56,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:12:56,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:12:56,470 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 267 [2021-12-06 18:12:56,471 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 234 transitions, 538 flow. Second operand has 6 states, 6 states have (on average 206.83333333333334) internal successors, (1241), 6 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:56,472 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:12:56,472 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 267 [2021-12-06 18:12:56,472 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:12:56,646 INFO L129 PetriNetUnfolder]: 151/716 cut-off events. [2021-12-06 18:12:56,646 INFO L130 PetriNetUnfolder]: For 165/165 co-relation queries the response was YES. [2021-12-06 18:12:56,648 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1302 conditions, 716 events. 151/716 cut-off events. For 165/165 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2510 event pairs, 94 based on Foata normal form. 7/686 useless extension candidates. Maximal degree in co-relation 1291. Up to 247 conditions per place. [2021-12-06 18:12:56,650 INFO L132 encePairwiseOnDemand]: 257/267 looper letters, 51 selfloop transitions, 8 changer transitions 21/259 dead transitions. [2021-12-06 18:12:56,650 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 259 transitions, 772 flow [2021-12-06 18:12:56,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:12:56,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-06 18:12:56,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1867 transitions. [2021-12-06 18:12:56,655 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7769454848106534 [2021-12-06 18:12:56,655 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1867 transitions. [2021-12-06 18:12:56,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1867 transitions. [2021-12-06 18:12:56,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:12:56,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1867 transitions. [2021-12-06 18:12:56,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 207.44444444444446) internal successors, (1867), 9 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:56,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:56,665 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:56,665 INFO L186 Difference]: Start difference. First operand has 245 places, 234 transitions, 538 flow. Second operand 9 states and 1867 transitions. [2021-12-06 18:12:56,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 259 transitions, 772 flow [2021-12-06 18:12:56,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 259 transitions, 754 flow, removed 1 selfloop flow, removed 5 redundant places. [2021-12-06 18:12:56,670 INFO L242 Difference]: Finished difference. Result has 249 places, 235 transitions, 554 flow [2021-12-06 18:12:56,671 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=554, PETRI_PLACES=249, PETRI_TRANSITIONS=235} [2021-12-06 18:12:56,671 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 8 predicate places. [2021-12-06 18:12:56,671 INFO L470 AbstractCegarLoop]: Abstraction has has 249 places, 235 transitions, 554 flow [2021-12-06 18:12:56,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 206.83333333333334) internal successors, (1241), 6 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:56,672 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:12:56,672 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:12:56,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 18:12:56,673 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 18:12:56,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:12:56,673 INFO L85 PathProgramCache]: Analyzing trace with hash 65111761, now seen corresponding path program 1 times [2021-12-06 18:12:56,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:12:56,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711197664] [2021-12-06 18:12:56,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:12:56,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:12:56,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:56,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:12:56,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:12:56,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711197664] [2021-12-06 18:12:56,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711197664] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:12:56,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882282305] [2021-12-06 18:12:56,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:12:56,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:12:56,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:12:56,843 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:12:56,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 18:12:56,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:56,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 18:12:56,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:12:57,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:12:57,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:12:57,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 4 [2021-12-06 18:12:58,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:12:58,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882282305] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:12:58,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:12:58,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2021-12-06 18:12:58,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263441296] [2021-12-06 18:12:58,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:12:58,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 18:12:58,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:12:58,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 18:12:58,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2021-12-06 18:12:58,100 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 267 [2021-12-06 18:12:58,105 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 235 transitions, 554 flow. Second operand has 25 states, 25 states have (on average 196.0) internal successors, (4900), 25 states have internal predecessors, (4900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:58,105 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:12:58,105 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 267 [2021-12-06 18:12:58,105 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:12:58,600 INFO L129 PetriNetUnfolder]: 189/967 cut-off events. [2021-12-06 18:12:58,600 INFO L130 PetriNetUnfolder]: For 252/252 co-relation queries the response was YES. [2021-12-06 18:12:58,603 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1765 conditions, 967 events. 189/967 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4281 event pairs, 64 based on Foata normal form. 56/973 useless extension candidates. Maximal degree in co-relation 1753. Up to 187 conditions per place. [2021-12-06 18:12:58,605 INFO L132 encePairwiseOnDemand]: 246/267 looper letters, 52 selfloop transitions, 22 changer transitions 61/307 dead transitions. [2021-12-06 18:12:58,605 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 307 transitions, 1055 flow [2021-12-06 18:12:58,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 18:12:58,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-12-06 18:12:58,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4161 transitions. [2021-12-06 18:12:58,619 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7421080791867308 [2021-12-06 18:12:58,619 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4161 transitions. [2021-12-06 18:12:58,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4161 transitions. [2021-12-06 18:12:58,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:12:58,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4161 transitions. [2021-12-06 18:12:58,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 198.14285714285714) internal successors, (4161), 21 states have internal predecessors, (4161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:58,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 267.0) internal successors, (5874), 22 states have internal predecessors, (5874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:58,643 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 267.0) internal successors, (5874), 22 states have internal predecessors, (5874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:58,643 INFO L186 Difference]: Start difference. First operand has 249 places, 235 transitions, 554 flow. Second operand 21 states and 4161 transitions. [2021-12-06 18:12:58,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 307 transitions, 1055 flow [2021-12-06 18:12:58,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 307 transitions, 1023 flow, removed 3 selfloop flow, removed 6 redundant places. [2021-12-06 18:12:58,661 INFO L242 Difference]: Finished difference. Result has 270 places, 240 transitions, 640 flow [2021-12-06 18:12:58,662 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=640, PETRI_PLACES=270, PETRI_TRANSITIONS=240} [2021-12-06 18:12:58,662 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 29 predicate places. [2021-12-06 18:12:58,662 INFO L470 AbstractCegarLoop]: Abstraction has has 270 places, 240 transitions, 640 flow [2021-12-06 18:12:58,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 196.0) internal successors, (4900), 25 states have internal predecessors, (4900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:58,665 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:12:58,665 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:12:58,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:12:58,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:12:58,866 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 18:12:58,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:12:58,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1048453403, now seen corresponding path program 2 times [2021-12-06 18:12:58,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:12:58,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685942979] [2021-12-06 18:12:58,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:12:58,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:12:58,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:59,021 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 18:12:59,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:12:59,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685942979] [2021-12-06 18:12:59,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685942979] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:12:59,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:12:59,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:12:59,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194347738] [2021-12-06 18:12:59,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:12:59,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:12:59,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:12:59,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:12:59,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:12:59,024 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 267 [2021-12-06 18:12:59,025 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 240 transitions, 640 flow. Second operand has 5 states, 5 states have (on average 222.6) internal successors, (1113), 5 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:59,025 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:12:59,026 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 267 [2021-12-06 18:12:59,026 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:12:59,282 INFO L129 PetriNetUnfolder]: 562/1433 cut-off events. [2021-12-06 18:12:59,282 INFO L130 PetriNetUnfolder]: For 1736/1784 co-relation queries the response was YES. [2021-12-06 18:12:59,286 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3366 conditions, 1433 events. 562/1433 cut-off events. For 1736/1784 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 7481 event pairs, 259 based on Foata normal form. 0/1338 useless extension candidates. Maximal degree in co-relation 3346. Up to 539 conditions per place. [2021-12-06 18:12:59,294 INFO L132 encePairwiseOnDemand]: 261/267 looper letters, 58 selfloop transitions, 6 changer transitions 0/267 dead transitions. [2021-12-06 18:12:59,294 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 267 transitions, 874 flow [2021-12-06 18:12:59,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:12:59,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-06 18:12:59,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1142 transitions. [2021-12-06 18:12:59,297 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8554307116104869 [2021-12-06 18:12:59,297 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1142 transitions. [2021-12-06 18:12:59,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1142 transitions. [2021-12-06 18:12:59,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:12:59,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1142 transitions. [2021-12-06 18:12:59,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 228.4) internal successors, (1142), 5 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:59,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:59,302 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:59,302 INFO L186 Difference]: Start difference. First operand has 270 places, 240 transitions, 640 flow. Second operand 5 states and 1142 transitions. [2021-12-06 18:12:59,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 267 transitions, 874 flow [2021-12-06 18:12:59,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 267 transitions, 804 flow, removed 22 selfloop flow, removed 10 redundant places. [2021-12-06 18:12:59,310 INFO L242 Difference]: Finished difference. Result has 258 places, 244 transitions, 632 flow [2021-12-06 18:12:59,311 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=632, PETRI_PLACES=258, PETRI_TRANSITIONS=244} [2021-12-06 18:12:59,311 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 17 predicate places. [2021-12-06 18:12:59,311 INFO L470 AbstractCegarLoop]: Abstraction has has 258 places, 244 transitions, 632 flow [2021-12-06 18:12:59,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 222.6) internal successors, (1113), 5 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:59,312 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:12:59,312 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:12:59,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 18:12:59,313 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 18:12:59,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:12:59,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1799574207, now seen corresponding path program 3 times [2021-12-06 18:12:59,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:12:59,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230116634] [2021-12-06 18:12:59,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:12:59,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:12:59,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:59,507 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 18:12:59,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:12:59,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230116634] [2021-12-06 18:12:59,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230116634] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:12:59,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:12:59,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-06 18:12:59,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315793197] [2021-12-06 18:12:59,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:12:59,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 18:12:59,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:12:59,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 18:12:59,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:12:59,512 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 267 [2021-12-06 18:12:59,514 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 244 transitions, 632 flow. Second operand has 12 states, 12 states have (on average 188.16666666666666) internal successors, (2258), 12 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:12:59,514 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:12:59,514 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 267 [2021-12-06 18:12:59,514 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:13:00,023 INFO L129 PetriNetUnfolder]: 763/1883 cut-off events. [2021-12-06 18:13:00,023 INFO L130 PetriNetUnfolder]: For 1147/1181 co-relation queries the response was YES. [2021-12-06 18:13:00,031 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4212 conditions, 1883 events. 763/1883 cut-off events. For 1147/1181 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 11086 event pairs, 349 based on Foata normal form. 30/1824 useless extension candidates. Maximal degree in co-relation 4194. Up to 557 conditions per place. [2021-12-06 18:13:00,043 INFO L132 encePairwiseOnDemand]: 242/267 looper letters, 68 selfloop transitions, 27 changer transitions 0/269 dead transitions. [2021-12-06 18:13:00,043 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 269 transitions, 912 flow [2021-12-06 18:13:00,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 18:13:00,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-06 18:13:00,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3202 transitions. [2021-12-06 18:13:00,051 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7054417272526988 [2021-12-06 18:13:00,051 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3202 transitions. [2021-12-06 18:13:00,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3202 transitions. [2021-12-06 18:13:00,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:13:00,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3202 transitions. [2021-12-06 18:13:00,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 188.35294117647058) internal successors, (3202), 17 states have internal predecessors, (3202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:00,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 267.0) internal successors, (4806), 18 states have internal predecessors, (4806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:00,065 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 267.0) internal successors, (4806), 18 states have internal predecessors, (4806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:00,065 INFO L186 Difference]: Start difference. First operand has 258 places, 244 transitions, 632 flow. Second operand 17 states and 3202 transitions. [2021-12-06 18:13:00,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 269 transitions, 912 flow [2021-12-06 18:13:00,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 269 transitions, 904 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-12-06 18:13:00,071 INFO L242 Difference]: Finished difference. Result has 274 places, 246 transitions, 702 flow [2021-12-06 18:13:00,072 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=702, PETRI_PLACES=274, PETRI_TRANSITIONS=246} [2021-12-06 18:13:00,072 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 33 predicate places. [2021-12-06 18:13:00,072 INFO L470 AbstractCegarLoop]: Abstraction has has 274 places, 246 transitions, 702 flow [2021-12-06 18:13:00,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 188.16666666666666) internal successors, (2258), 12 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:00,073 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:13:00,073 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:13:00,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 18:13:00,073 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 18:13:00,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:13:00,074 INFO L85 PathProgramCache]: Analyzing trace with hash -2136712629, now seen corresponding path program 4 times [2021-12-06 18:13:00,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:13:00,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652281330] [2021-12-06 18:13:00,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:00,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:13:00,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:00,712 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:13:00,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:13:00,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652281330] [2021-12-06 18:13:00,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652281330] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:13:00,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050438526] [2021-12-06 18:13:00,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:13:00,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:00,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:13:00,714 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:13:00,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 18:13:00,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:13:00,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:13:00,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-06 18:13:00,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:13:00,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 18:13:01,048 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:13:01,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 18:13:01,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:13:01,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-06 18:13:01,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-06 18:13:02,471 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:13:02,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:13:02,968 INFO L354 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2021-12-06 18:13:02,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 156 treesize of output 143 [2021-12-06 18:13:02,977 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-06 18:13:02,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 101 [2021-12-06 18:13:02,985 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-06 18:13:02,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 67 [2021-12-06 18:13:04,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 18:13:04,984 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:13:04,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050438526] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:13:04,985 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:13:04,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 64 [2021-12-06 18:13:04,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839631021] [2021-12-06 18:13:04,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:13:04,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-06 18:13:04,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:13:04,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-06 18:13:04,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=3755, Unknown=1, NotChecked=0, Total=4032 [2021-12-06 18:13:04,997 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 267 [2021-12-06 18:13:05,006 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 246 transitions, 702 flow. Second operand has 64 states, 64 states have (on average 153.140625) internal successors, (9801), 64 states have internal predecessors, (9801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:05,006 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:13:05,006 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 267 [2021-12-06 18:13:05,006 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:13:10,720 INFO L129 PetriNetUnfolder]: 964/2784 cut-off events. [2021-12-06 18:13:10,721 INFO L130 PetriNetUnfolder]: For 2070/2075 co-relation queries the response was YES. [2021-12-06 18:13:10,728 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6291 conditions, 2784 events. 964/2784 cut-off events. For 2070/2075 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 18448 event pairs, 183 based on Foata normal form. 7/2678 useless extension candidates. Maximal degree in co-relation 6271. Up to 1119 conditions per place. [2021-12-06 18:13:10,740 INFO L132 encePairwiseOnDemand]: 209/267 looper letters, 185 selfloop transitions, 110 changer transitions 0/429 dead transitions. [2021-12-06 18:13:10,740 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 429 transitions, 1945 flow [2021-12-06 18:13:10,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-06 18:13:10,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-12-06 18:13:10,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 8922 transitions. [2021-12-06 18:13:10,754 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5761332816737699 [2021-12-06 18:13:10,754 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 8922 transitions. [2021-12-06 18:13:10,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 8922 transitions. [2021-12-06 18:13:10,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:13:10,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 8922 transitions. [2021-12-06 18:13:10,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 153.82758620689654) internal successors, (8922), 58 states have internal predecessors, (8922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:10,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 267.0) internal successors, (15753), 59 states have internal predecessors, (15753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:10,791 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 267.0) internal successors, (15753), 59 states have internal predecessors, (15753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:10,791 INFO L186 Difference]: Start difference. First operand has 274 places, 246 transitions, 702 flow. Second operand 58 states and 8922 transitions. [2021-12-06 18:13:10,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 429 transitions, 1945 flow [2021-12-06 18:13:10,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 429 transitions, 1844 flow, removed 12 selfloop flow, removed 14 redundant places. [2021-12-06 18:13:10,802 INFO L242 Difference]: Finished difference. Result has 348 places, 333 transitions, 1481 flow [2021-12-06 18:13:10,803 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=1481, PETRI_PLACES=348, PETRI_TRANSITIONS=333} [2021-12-06 18:13:10,803 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 107 predicate places. [2021-12-06 18:13:10,803 INFO L470 AbstractCegarLoop]: Abstraction has has 348 places, 333 transitions, 1481 flow [2021-12-06 18:13:10,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 153.140625) internal successors, (9801), 64 states have internal predecessors, (9801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:10,805 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:13:10,806 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:13:10,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 18:13:11,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 18:13:11,007 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 18:13:11,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:13:11,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1946406089, now seen corresponding path program 5 times [2021-12-06 18:13:11,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:13:11,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977479095] [2021-12-06 18:13:11,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:11,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:13:11,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:11,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:13:11,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:13:11,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977479095] [2021-12-06 18:13:11,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977479095] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:13:11,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920926497] [2021-12-06 18:13:11,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:13:11,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:11,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:13:11,588 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:13:11,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 18:13:11,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-06 18:13:11,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:13:11,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 18:13:11,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:13:11,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 18:13:11,739 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-06 18:13:11,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 18:13:11,821 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-12-06 18:13:11,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:13:12,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 18:13:12,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 18:13:12,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-12-06 18:13:12,451 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:13:12,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:13:12,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:13:12,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 80 [2021-12-06 18:13:12,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2021-12-06 18:13:12,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-12-06 18:13:13,219 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 18:13:13,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920926497] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 18:13:13,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:13:13,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [23, 16] total 45 [2021-12-06 18:13:13,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700013578] [2021-12-06 18:13:13,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:13:13,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 18:13:13,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:13:13,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 18:13:13,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1835, Unknown=1, NotChecked=0, Total=1980 [2021-12-06 18:13:13,223 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 267 [2021-12-06 18:13:13,225 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 333 transitions, 1481 flow. Second operand has 14 states, 14 states have (on average 183.64285714285714) internal successors, (2571), 14 states have internal predecessors, (2571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:13,225 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:13:13,225 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 267 [2021-12-06 18:13:13,225 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:13:14,019 INFO L129 PetriNetUnfolder]: 1022/2685 cut-off events. [2021-12-06 18:13:14,019 INFO L130 PetriNetUnfolder]: For 8185/8317 co-relation queries the response was YES. [2021-12-06 18:13:14,041 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9060 conditions, 2685 events. 1022/2685 cut-off events. For 8185/8317 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16949 event pairs, 260 based on Foata normal form. 47/2629 useless extension candidates. Maximal degree in co-relation 9010. Up to 971 conditions per place. [2021-12-06 18:13:14,060 INFO L132 encePairwiseOnDemand]: 248/267 looper letters, 105 selfloop transitions, 43 changer transitions 0/349 dead transitions. [2021-12-06 18:13:14,060 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 349 transitions, 1909 flow [2021-12-06 18:13:14,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 18:13:14,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-06 18:13:14,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3321 transitions. [2021-12-06 18:13:14,064 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6910112359550562 [2021-12-06 18:13:14,065 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3321 transitions. [2021-12-06 18:13:14,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3321 transitions. [2021-12-06 18:13:14,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:13:14,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3321 transitions. [2021-12-06 18:13:14,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 184.5) internal successors, (3321), 18 states have internal predecessors, (3321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:14,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 267.0) internal successors, (5073), 19 states have internal predecessors, (5073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:14,078 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 267.0) internal successors, (5073), 19 states have internal predecessors, (5073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:14,078 INFO L186 Difference]: Start difference. First operand has 348 places, 333 transitions, 1481 flow. Second operand 18 states and 3321 transitions. [2021-12-06 18:13:14,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 349 transitions, 1909 flow [2021-12-06 18:13:14,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 349 transitions, 1801 flow, removed 38 selfloop flow, removed 15 redundant places. [2021-12-06 18:13:14,119 INFO L242 Difference]: Finished difference. Result has 348 places, 325 transitions, 1464 flow [2021-12-06 18:13:14,119 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1292, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1464, PETRI_PLACES=348, PETRI_TRANSITIONS=325} [2021-12-06 18:13:14,120 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 107 predicate places. [2021-12-06 18:13:14,120 INFO L470 AbstractCegarLoop]: Abstraction has has 348 places, 325 transitions, 1464 flow [2021-12-06 18:13:14,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 183.64285714285714) internal successors, (2571), 14 states have internal predecessors, (2571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:14,121 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:13:14,121 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:13:14,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 18:13:14,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:14,323 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 18:13:14,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:13:14,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1303190425, now seen corresponding path program 1 times [2021-12-06 18:13:14,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:13:14,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392338950] [2021-12-06 18:13:14,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:14,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:13:14,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:14,501 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:13:14,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:13:14,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392338950] [2021-12-06 18:13:14,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392338950] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:13:14,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760054789] [2021-12-06 18:13:14,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:14,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:14,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:13:14,502 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:13:14,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 18:13:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:14,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 18:13:14,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:13:15,018 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:13:15,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:13:15,482 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:13:15,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760054789] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:13:15,483 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:13:15,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2021-12-06 18:13:15,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396268507] [2021-12-06 18:13:15,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:13:15,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 18:13:15,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:13:15,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 18:13:15,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2021-12-06 18:13:15,489 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 267 [2021-12-06 18:13:15,492 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 325 transitions, 1464 flow. Second operand has 25 states, 25 states have (on average 196.32) internal successors, (4908), 25 states have internal predecessors, (4908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:15,492 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:13:15,492 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 267 [2021-12-06 18:13:15,492 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:13:16,380 INFO L129 PetriNetUnfolder]: 893/3348 cut-off events. [2021-12-06 18:13:16,381 INFO L130 PetriNetUnfolder]: For 9339/9418 co-relation queries the response was YES. [2021-12-06 18:13:16,402 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10311 conditions, 3348 events. 893/3348 cut-off events. For 9339/9418 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 25426 event pairs, 333 based on Foata normal form. 39/3237 useless extension candidates. Maximal degree in co-relation 10261. Up to 631 conditions per place. [2021-12-06 18:13:16,412 INFO L132 encePairwiseOnDemand]: 247/267 looper letters, 90 selfloop transitions, 48 changer transitions 75/410 dead transitions. [2021-12-06 18:13:16,412 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 410 transitions, 2535 flow [2021-12-06 18:13:16,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 18:13:16,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-06 18:13:16,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3945 transitions. [2021-12-06 18:13:16,415 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7387640449438202 [2021-12-06 18:13:16,415 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3945 transitions. [2021-12-06 18:13:16,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3945 transitions. [2021-12-06 18:13:16,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:13:16,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3945 transitions. [2021-12-06 18:13:16,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 197.25) internal successors, (3945), 20 states have internal predecessors, (3945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:16,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 267.0) internal successors, (5607), 21 states have internal predecessors, (5607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:16,424 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 267.0) internal successors, (5607), 21 states have internal predecessors, (5607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:16,424 INFO L186 Difference]: Start difference. First operand has 348 places, 325 transitions, 1464 flow. Second operand 20 states and 3945 transitions. [2021-12-06 18:13:16,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 410 transitions, 2535 flow [2021-12-06 18:13:16,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 410 transitions, 2404 flow, removed 27 selfloop flow, removed 14 redundant places. [2021-12-06 18:13:16,446 INFO L242 Difference]: Finished difference. Result has 359 places, 329 transitions, 1535 flow [2021-12-06 18:13:16,447 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1376, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1535, PETRI_PLACES=359, PETRI_TRANSITIONS=329} [2021-12-06 18:13:16,447 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 118 predicate places. [2021-12-06 18:13:16,447 INFO L470 AbstractCegarLoop]: Abstraction has has 359 places, 329 transitions, 1535 flow [2021-12-06 18:13:16,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 196.32) internal successors, (4908), 25 states have internal predecessors, (4908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:16,448 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:13:16,448 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:13:16,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 18:13:16,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 18:13:16,650 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 18:13:16,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:13:16,651 INFO L85 PathProgramCache]: Analyzing trace with hash 910836023, now seen corresponding path program 2 times [2021-12-06 18:13:16,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:13:16,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955535160] [2021-12-06 18:13:16,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:16,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:13:16,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 18:13:16,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:13:16,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955535160] [2021-12-06 18:13:16,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955535160] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:13:16,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:13:16,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:13:16,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013509865] [2021-12-06 18:13:16,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:13:16,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:13:16,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:13:16,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:13:16,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:13:16,767 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 267 [2021-12-06 18:13:16,768 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 329 transitions, 1535 flow. Second operand has 4 states, 4 states have (on average 237.75) internal successors, (951), 4 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:16,768 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:13:16,768 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 267 [2021-12-06 18:13:16,768 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:13:17,394 INFO L129 PetriNetUnfolder]: 685/2647 cut-off events. [2021-12-06 18:13:17,394 INFO L130 PetriNetUnfolder]: For 7619/7700 co-relation queries the response was YES. [2021-12-06 18:13:17,409 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7883 conditions, 2647 events. 685/2647 cut-off events. For 7619/7700 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 18670 event pairs, 128 based on Foata normal form. 51/2550 useless extension candidates. Maximal degree in co-relation 7827. Up to 378 conditions per place. [2021-12-06 18:13:17,419 INFO L132 encePairwiseOnDemand]: 263/267 looper letters, 45 selfloop transitions, 25 changer transitions 0/352 dead transitions. [2021-12-06 18:13:17,419 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 352 transitions, 1835 flow [2021-12-06 18:13:17,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:13:17,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-06 18:13:17,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 971 transitions. [2021-12-06 18:13:17,420 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9091760299625468 [2021-12-06 18:13:17,420 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 971 transitions. [2021-12-06 18:13:17,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 971 transitions. [2021-12-06 18:13:17,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:13:17,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 971 transitions. [2021-12-06 18:13:17,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 242.75) internal successors, (971), 4 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:17,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:17,423 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:17,423 INFO L186 Difference]: Start difference. First operand has 359 places, 329 transitions, 1535 flow. Second operand 4 states and 971 transitions. [2021-12-06 18:13:17,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 352 transitions, 1835 flow [2021-12-06 18:13:17,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 352 transitions, 1741 flow, removed 13 selfloop flow, removed 9 redundant places. [2021-12-06 18:13:17,440 INFO L242 Difference]: Finished difference. Result has 348 places, 336 transitions, 1636 flow [2021-12-06 18:13:17,440 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1453, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1636, PETRI_PLACES=348, PETRI_TRANSITIONS=336} [2021-12-06 18:13:17,441 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 107 predicate places. [2021-12-06 18:13:17,441 INFO L470 AbstractCegarLoop]: Abstraction has has 348 places, 336 transitions, 1636 flow [2021-12-06 18:13:17,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 237.75) internal successors, (951), 4 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:17,441 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:13:17,441 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:13:17,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 18:13:17,441 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 18:13:17,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:13:17,442 INFO L85 PathProgramCache]: Analyzing trace with hash -512449457, now seen corresponding path program 3 times [2021-12-06 18:13:17,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:13:17,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870482716] [2021-12-06 18:13:17,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:17,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:13:17,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:17,945 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:13:17,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:13:17,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870482716] [2021-12-06 18:13:17,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870482716] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:13:17,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235032484] [2021-12-06 18:13:17,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:13:17,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:17,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:13:17,946 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:13:17,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 18:13:18,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-06 18:13:18,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:13:18,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-06 18:13:18,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:13:19,211 INFO L354 Elim1Store]: treesize reduction 3, result has 83.3 percent of original size [2021-12-06 18:13:19,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 27 [2021-12-06 18:13:19,234 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 18:13:19,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:13:19,676 INFO L354 Elim1Store]: treesize reduction 20, result has 81.7 percent of original size [2021-12-06 18:13:19,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 107 [2021-12-06 18:13:20,028 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 18:13:20,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235032484] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:13:20,028 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:13:20,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 17, 10] total 45 [2021-12-06 18:13:20,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468246738] [2021-12-06 18:13:20,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:13:20,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-06 18:13:20,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:13:20,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-06 18:13:20,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1811, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 18:13:20,036 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 267 [2021-12-06 18:13:20,040 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 336 transitions, 1636 flow. Second operand has 45 states, 45 states have (on average 155.0888888888889) internal successors, (6979), 45 states have internal predecessors, (6979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:20,040 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:13:20,040 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 267 [2021-12-06 18:13:20,040 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:13:26,261 INFO L129 PetriNetUnfolder]: 7591/16028 cut-off events. [2021-12-06 18:13:26,261 INFO L130 PetriNetUnfolder]: For 67451/69345 co-relation queries the response was YES. [2021-12-06 18:13:26,372 INFO L84 FinitePrefix]: Finished finitePrefix Result has 56512 conditions, 16028 events. 7591/16028 cut-off events. For 67451/69345 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 138397 event pairs, 1710 based on Foata normal form. 38/14497 useless extension candidates. Maximal degree in co-relation 56456. Up to 4589 conditions per place. [2021-12-06 18:13:26,447 INFO L132 encePairwiseOnDemand]: 205/267 looper letters, 399 selfloop transitions, 308 changer transitions 0/838 dead transitions. [2021-12-06 18:13:26,447 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 838 transitions, 6701 flow [2021-12-06 18:13:26,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-12-06 18:13:26,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-12-06 18:13:26,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 12900 transitions. [2021-12-06 18:13:26,457 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5821036956816028 [2021-12-06 18:13:26,457 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 12900 transitions. [2021-12-06 18:13:26,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 12900 transitions. [2021-12-06 18:13:26,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:13:26,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 12900 transitions. [2021-12-06 18:13:26,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 155.42168674698794) internal successors, (12900), 83 states have internal predecessors, (12900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:26,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 267.0) internal successors, (22428), 84 states have internal predecessors, (22428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:26,489 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 267.0) internal successors, (22428), 84 states have internal predecessors, (22428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:26,489 INFO L186 Difference]: Start difference. First operand has 348 places, 336 transitions, 1636 flow. Second operand 83 states and 12900 transitions. [2021-12-06 18:13:26,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 838 transitions, 6701 flow [2021-12-06 18:13:26,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 838 transitions, 6497 flow, removed 102 selfloop flow, removed 0 redundant places. [2021-12-06 18:13:26,571 INFO L242 Difference]: Finished difference. Result has 465 places, 587 transitions, 4695 flow [2021-12-06 18:13:26,572 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1608, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=4695, PETRI_PLACES=465, PETRI_TRANSITIONS=587} [2021-12-06 18:13:26,572 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 224 predicate places. [2021-12-06 18:13:26,572 INFO L470 AbstractCegarLoop]: Abstraction has has 465 places, 587 transitions, 4695 flow [2021-12-06 18:13:26,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 155.0888888888889) internal successors, (6979), 45 states have internal predecessors, (6979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:26,573 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:13:26,573 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:13:26,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 18:13:26,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 18:13:26,774 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 18:13:26,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:13:26,774 INFO L85 PathProgramCache]: Analyzing trace with hash 640490041, now seen corresponding path program 4 times [2021-12-06 18:13:26,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:13:26,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104326872] [2021-12-06 18:13:26,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:26,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:13:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:27,300 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:13:27,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:13:27,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104326872] [2021-12-06 18:13:27,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104326872] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:13:27,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114668156] [2021-12-06 18:13:27,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:13:27,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:27,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:13:27,301 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:13:27,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 18:13:27,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:13:27,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:13:27,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-06 18:13:27,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:13:29,613 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:13:29,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:13:30,203 INFO L354 Elim1Store]: treesize reduction 44, result has 75.4 percent of original size [2021-12-06 18:13:30,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 151 [2021-12-06 18:13:31,493 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:13:31,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114668156] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:13:31,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:13:31,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 30, 26] total 72 [2021-12-06 18:13:31,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623599624] [2021-12-06 18:13:31,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:13:31,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-12-06 18:13:31,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:13:31,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-12-06 18:13:31,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=4371, Unknown=0, NotChecked=0, Total=5112 [2021-12-06 18:13:31,502 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 267 [2021-12-06 18:13:31,508 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 587 transitions, 4695 flow. Second operand has 72 states, 72 states have (on average 152.01388888888889) internal successors, (10945), 72 states have internal predecessors, (10945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:31,508 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:13:31,508 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 267 [2021-12-06 18:13:31,508 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:13:39,554 INFO L129 PetriNetUnfolder]: 9264/19409 cut-off events. [2021-12-06 18:13:39,554 INFO L130 PetriNetUnfolder]: For 264122/267758 co-relation queries the response was YES. [2021-12-06 18:13:39,806 INFO L84 FinitePrefix]: Finished finitePrefix Result has 108748 conditions, 19409 events. 9264/19409 cut-off events. For 264122/267758 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 172771 event pairs, 2344 based on Foata normal form. 118/18083 useless extension candidates. Maximal degree in co-relation 108657. Up to 11869 conditions per place. [2021-12-06 18:13:39,945 INFO L132 encePairwiseOnDemand]: 203/267 looper letters, 498 selfloop transitions, 391 changer transitions 0/1019 dead transitions. [2021-12-06 18:13:39,946 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 1019 transitions, 10880 flow [2021-12-06 18:13:39,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-12-06 18:13:39,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-12-06 18:13:39,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 13617 transitions. [2021-12-06 18:13:39,960 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5730337078651685 [2021-12-06 18:13:39,960 INFO L72 ComplementDD]: Start complementDD. Operand 89 states and 13617 transitions. [2021-12-06 18:13:39,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 13617 transitions. [2021-12-06 18:13:39,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:13:39,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 89 states and 13617 transitions. [2021-12-06 18:13:39,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 90 states, 89 states have (on average 153.0) internal successors, (13617), 89 states have internal predecessors, (13617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:40,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 90 states, 90 states have (on average 267.0) internal successors, (24030), 90 states have internal predecessors, (24030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:40,003 INFO L81 ComplementDD]: Finished complementDD. Result has 90 states, 90 states have (on average 267.0) internal successors, (24030), 90 states have internal predecessors, (24030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:40,003 INFO L186 Difference]: Start difference. First operand has 465 places, 587 transitions, 4695 flow. Second operand 89 states and 13617 transitions. [2021-12-06 18:13:40,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 1019 transitions, 10880 flow [2021-12-06 18:13:40,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 1019 transitions, 10421 flow, removed 157 selfloop flow, removed 20 redundant places. [2021-12-06 18:13:40,427 INFO L242 Difference]: Finished difference. Result has 559 places, 871 transitions, 8812 flow [2021-12-06 18:13:40,428 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=4401, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=89, PETRI_FLOW=8812, PETRI_PLACES=559, PETRI_TRANSITIONS=871} [2021-12-06 18:13:40,428 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 318 predicate places. [2021-12-06 18:13:40,428 INFO L470 AbstractCegarLoop]: Abstraction has has 559 places, 871 transitions, 8812 flow [2021-12-06 18:13:40,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 152.01388888888889) internal successors, (10945), 72 states have internal predecessors, (10945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:40,429 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:13:40,430 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:13:40,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 18:13:40,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:40,632 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 18:13:40,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:13:40,633 INFO L85 PathProgramCache]: Analyzing trace with hash -554543831, now seen corresponding path program 5 times [2021-12-06 18:13:40,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:13:40,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80416115] [2021-12-06 18:13:40,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:40,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:13:40,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:13:41,791 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:13:41,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:13:41,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80416115] [2021-12-06 18:13:41,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80416115] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:13:41,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450775060] [2021-12-06 18:13:41,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:13:41,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:41,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:13:41,792 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:13:41,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 18:13:41,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-06 18:13:41,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:13:41,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-06 18:13:41,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:13:42,666 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:13:42,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:13:45,102 INFO L354 Elim1Store]: treesize reduction 46, result has 74.9 percent of original size [2021-12-06 18:13:45,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 153 [2021-12-06 18:13:45,583 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 18:13:45,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450775060] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:13:45,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:13:45,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 16, 9] total 58 [2021-12-06 18:13:45,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959362368] [2021-12-06 18:13:45,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:13:45,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-06 18:13:45,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:13:45,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-06 18:13:45,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=3060, Unknown=0, NotChecked=0, Total=3306 [2021-12-06 18:13:45,593 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 267 [2021-12-06 18:13:45,598 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 871 transitions, 8812 flow. Second operand has 58 states, 58 states have (on average 152.8448275862069) internal successors, (8865), 58 states have internal predecessors, (8865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:45,598 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:13:45,599 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 267 [2021-12-06 18:13:45,599 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:13:57,157 INFO L129 PetriNetUnfolder]: 10585/22799 cut-off events. [2021-12-06 18:13:57,157 INFO L130 PetriNetUnfolder]: For 578361/586158 co-relation queries the response was YES. [2021-12-06 18:13:57,470 INFO L84 FinitePrefix]: Finished finitePrefix Result has 155307 conditions, 22799 events. 10585/22799 cut-off events. For 578361/586158 co-relation queries the response was YES. Maximal size of possible extension queue 866. Compared 214864 event pairs, 2031 based on Foata normal form. 391/21547 useless extension candidates. Maximal degree in co-relation 155189. Up to 11836 conditions per place. [2021-12-06 18:13:57,608 INFO L132 encePairwiseOnDemand]: 215/267 looper letters, 746 selfloop transitions, 393 changer transitions 3/1272 dead transitions. [2021-12-06 18:13:57,608 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 645 places, 1272 transitions, 16251 flow [2021-12-06 18:13:57,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-12-06 18:13:57,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-12-06 18:13:57,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 13320 transitions. [2021-12-06 18:13:57,617 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5734211545912437 [2021-12-06 18:13:57,617 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 13320 transitions. [2021-12-06 18:13:57,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 13320 transitions. [2021-12-06 18:13:57,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:13:57,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 13320 transitions. [2021-12-06 18:13:57,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 153.10344827586206) internal successors, (13320), 87 states have internal predecessors, (13320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:57,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 267.0) internal successors, (23496), 88 states have internal predecessors, (23496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:57,645 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 267.0) internal successors, (23496), 88 states have internal predecessors, (23496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:57,645 INFO L186 Difference]: Start difference. First operand has 559 places, 871 transitions, 8812 flow. Second operand 87 states and 13320 transitions. [2021-12-06 18:13:57,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 645 places, 1272 transitions, 16251 flow [2021-12-06 18:13:59,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 621 places, 1272 transitions, 15215 flow, removed 486 selfloop flow, removed 24 redundant places. [2021-12-06 18:13:59,289 INFO L242 Difference]: Finished difference. Result has 632 places, 1013 transitions, 10966 flow [2021-12-06 18:13:59,290 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=7878, PETRI_DIFFERENCE_MINUEND_PLACES=535, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=867, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=10966, PETRI_PLACES=632, PETRI_TRANSITIONS=1013} [2021-12-06 18:13:59,291 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 391 predicate places. [2021-12-06 18:13:59,291 INFO L470 AbstractCegarLoop]: Abstraction has has 632 places, 1013 transitions, 10966 flow [2021-12-06 18:13:59,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 152.8448275862069) internal successors, (8865), 58 states have internal predecessors, (8865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:13:59,292 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:13:59,292 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:13:59,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-06 18:13:59,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:13:59,493 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 18:13:59,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:13:59,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1517652893, now seen corresponding path program 6 times [2021-12-06 18:13:59,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:13:59,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801286703] [2021-12-06 18:13:59,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:13:59,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:13:59,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:00,026 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:14:00,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:14:00,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801286703] [2021-12-06 18:14:00,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801286703] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:14:00,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874299240] [2021-12-06 18:14:00,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:14:00,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:14:00,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:14:00,027 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:14:00,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 18:14:00,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-12-06 18:14:00,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:14:00,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-06 18:14:00,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:14:02,485 INFO L354 Elim1Store]: treesize reduction 3, result has 85.0 percent of original size [2021-12-06 18:14:02,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 29 [2021-12-06 18:14:02,593 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 18:14:02,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:14:02,966 INFO L354 Elim1Store]: treesize reduction 20, result has 81.7 percent of original size [2021-12-06 18:14:02,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 107 [2021-12-06 18:14:03,323 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 18:14:03,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874299240] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:14:03,324 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:14:03,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 14, 10] total 43 [2021-12-06 18:14:03,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901656425] [2021-12-06 18:14:03,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:14:03,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-06 18:14:03,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:14:03,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-06 18:14:03,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1677, Unknown=2, NotChecked=0, Total=1806 [2021-12-06 18:14:03,332 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 267 [2021-12-06 18:14:03,336 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 632 places, 1013 transitions, 10966 flow. Second operand has 43 states, 43 states have (on average 122.27906976744185) internal successors, (5258), 43 states have internal predecessors, (5258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:14:03,336 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:14:03,336 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 267 [2021-12-06 18:14:03,336 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:14:46,271 INFO L129 PetriNetUnfolder]: 43019/88623 cut-off events. [2021-12-06 18:14:46,271 INFO L130 PetriNetUnfolder]: For 2987584/3017163 co-relation queries the response was YES. [2021-12-06 18:14:48,702 INFO L84 FinitePrefix]: Finished finitePrefix Result has 670701 conditions, 88623 events. 43019/88623 cut-off events. For 2987584/3017163 co-relation queries the response was YES. Maximal size of possible extension queue 3334. Compared 999558 event pairs, 9393 based on Foata normal form. 2424/85989 useless extension candidates. Maximal degree in co-relation 670571. Up to 24824 conditions per place. [2021-12-06 18:14:49,470 INFO L132 encePairwiseOnDemand]: 208/267 looper letters, 2056 selfloop transitions, 821 changer transitions 4/2987 dead transitions. [2021-12-06 18:14:49,470 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 730 places, 2987 transitions, 44417 flow [2021-12-06 18:14:49,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-12-06 18:14:49,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-12-06 18:14:49,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 12391 transitions. [2021-12-06 18:14:49,480 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4687700979835811 [2021-12-06 18:14:49,480 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 12391 transitions. [2021-12-06 18:14:49,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 12391 transitions. [2021-12-06 18:14:49,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:14:49,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 12391 transitions. [2021-12-06 18:14:49,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 125.16161616161617) internal successors, (12391), 99 states have internal predecessors, (12391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:14:49,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 267.0) internal successors, (26700), 100 states have internal predecessors, (26700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:14:49,509 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 267.0) internal successors, (26700), 100 states have internal predecessors, (26700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:14:49,509 INFO L186 Difference]: Start difference. First operand has 632 places, 1013 transitions, 10966 flow. Second operand 99 states and 12391 transitions. [2021-12-06 18:14:49,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 730 places, 2987 transitions, 44417 flow [2021-12-06 18:15:04,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 672 places, 2987 transitions, 42564 flow, removed 836 selfloop flow, removed 58 redundant places. [2021-12-06 18:15:04,094 INFO L242 Difference]: Finished difference. Result has 717 places, 1627 transitions, 21984 flow [2021-12-06 18:15:04,095 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=10316, PETRI_DIFFERENCE_MINUEND_PLACES=574, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1013, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=21984, PETRI_PLACES=717, PETRI_TRANSITIONS=1627} [2021-12-06 18:15:04,095 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 476 predicate places. [2021-12-06 18:15:04,095 INFO L470 AbstractCegarLoop]: Abstraction has has 717 places, 1627 transitions, 21984 flow [2021-12-06 18:15:04,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 122.27906976744185) internal successors, (5258), 43 states have internal predecessors, (5258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:15:04,096 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:15:04,096 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:15:04,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 18:15:04,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 18:15:04,298 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 18:15:04,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:15:04,300 INFO L85 PathProgramCache]: Analyzing trace with hash 887533379, now seen corresponding path program 7 times [2021-12-06 18:15:04,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:15:04,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396748705] [2021-12-06 18:15:04,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:15:04,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:15:04,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:04,471 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 18:15:04,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:15:04,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396748705] [2021-12-06 18:15:04,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396748705] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:15:04,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486768914] [2021-12-06 18:15:04,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:15:04,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:15:04,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:15:04,473 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:15:04,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 18:15:04,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:04,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-06 18:15:04,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:15:09,050 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:15:09,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:15:09,658 INFO L354 Elim1Store]: treesize reduction 46, result has 74.9 percent of original size [2021-12-06 18:15:09,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 153 [2021-12-06 18:15:11,193 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:15:11,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486768914] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:15:11,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:15:11,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 26, 26] total 56 [2021-12-06 18:15:11,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516122262] [2021-12-06 18:15:11,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:15:11,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-06 18:15:11,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:15:11,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-06 18:15:11,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=2662, Unknown=1, NotChecked=0, Total=3080 [2021-12-06 18:15:11,201 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 267 [2021-12-06 18:15:11,206 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 717 places, 1627 transitions, 21984 flow. Second operand has 56 states, 56 states have (on average 170.33928571428572) internal successors, (9539), 56 states have internal predecessors, (9539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:15:11,207 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:15:11,207 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 267 [2021-12-06 18:15:11,207 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:16:15,806 INFO L129 PetriNetUnfolder]: 63280/130296 cut-off events. [2021-12-06 18:16:15,806 INFO L130 PetriNetUnfolder]: For 5796176/5860474 co-relation queries the response was YES. [2021-12-06 18:16:20,704 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1115844 conditions, 130296 events. 63280/130296 cut-off events. For 5796176/5860474 co-relation queries the response was YES. Maximal size of possible extension queue 4761. Compared 1540817 event pairs, 15515 based on Foata normal form. 2822/125302 useless extension candidates. Maximal degree in co-relation 1115669. Up to 62045 conditions per place. [2021-12-06 18:16:21,851 INFO L132 encePairwiseOnDemand]: 222/267 looper letters, 1810 selfloop transitions, 1284 changer transitions 0/3300 dead transitions. [2021-12-06 18:16:21,851 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 782 places, 3300 transitions, 54973 flow [2021-12-06 18:16:21,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-06 18:16:21,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-12-06 18:16:21,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 11401 transitions. [2021-12-06 18:16:21,860 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6469753716944728 [2021-12-06 18:16:21,860 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 11401 transitions. [2021-12-06 18:16:21,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 11401 transitions. [2021-12-06 18:16:21,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:16:21,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 11401 transitions. [2021-12-06 18:16:21,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 172.74242424242425) internal successors, (11401), 66 states have internal predecessors, (11401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:16:21,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 267.0) internal successors, (17889), 67 states have internal predecessors, (17889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:16:21,880 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 267.0) internal successors, (17889), 67 states have internal predecessors, (17889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:16:21,880 INFO L186 Difference]: Start difference. First operand has 717 places, 1627 transitions, 21984 flow. Second operand 66 states and 11401 transitions. [2021-12-06 18:16:21,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 782 places, 3300 transitions, 54973 flow [2021-12-06 18:17:07,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 758 places, 3300 transitions, 52896 flow, removed 1009 selfloop flow, removed 24 redundant places. [2021-12-06 18:17:07,635 INFO L242 Difference]: Finished difference. Result has 787 places, 2610 transitions, 41298 flow [2021-12-06 18:17:07,636 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=21097, PETRI_DIFFERENCE_MINUEND_PLACES=693, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=499, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=836, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=41298, PETRI_PLACES=787, PETRI_TRANSITIONS=2610} [2021-12-06 18:17:07,637 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 546 predicate places. [2021-12-06 18:17:07,637 INFO L470 AbstractCegarLoop]: Abstraction has has 787 places, 2610 transitions, 41298 flow [2021-12-06 18:17:07,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 170.33928571428572) internal successors, (9539), 56 states have internal predecessors, (9539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:17:07,638 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:17:07,638 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:17:07,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 18:17:07,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:17:07,840 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 18:17:07,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:17:07,841 INFO L85 PathProgramCache]: Analyzing trace with hash -212567155, now seen corresponding path program 8 times [2021-12-06 18:17:07,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:17:07,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925130276] [2021-12-06 18:17:07,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:17:07,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:17:07,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:08,356 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 18:17:08,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:17:08,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925130276] [2021-12-06 18:17:08,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925130276] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:17:08,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902413653] [2021-12-06 18:17:08,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:17:08,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:17:08,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:17:08,358 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:17:08,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 18:17:08,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:17:08,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:17:08,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-06 18:17:08,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:17:11,385 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:17:11,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:17:12,051 INFO L354 Elim1Store]: treesize reduction 44, result has 75.4 percent of original size [2021-12-06 18:17:12,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 151 [2021-12-06 18:17:13,954 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:17:13,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902413653] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:17:13,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:17:13,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 70 [2021-12-06 18:17:13,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247833038] [2021-12-06 18:17:13,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:17:13,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-06 18:17:13,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:17:13,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-06 18:17:13,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=513, Invalid=4317, Unknown=0, NotChecked=0, Total=4830 [2021-12-06 18:17:13,963 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 267 [2021-12-06 18:17:13,967 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 787 places, 2610 transitions, 41298 flow. Second operand has 70 states, 70 states have (on average 153.11428571428573) internal successors, (10718), 70 states have internal predecessors, (10718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:17:13,967 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:17:13,967 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 267 [2021-12-06 18:17:13,967 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 18:18:56,255 INFO L129 PetriNetUnfolder]: 74175/152591 cut-off events. [2021-12-06 18:18:56,255 INFO L130 PetriNetUnfolder]: For 8217782/8314737 co-relation queries the response was YES. [2021-12-06 18:19:03,200 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1440091 conditions, 152591 events. 74175/152591 cut-off events. For 8217782/8314737 co-relation queries the response was YES. Maximal size of possible extension queue 5536. Compared 1839955 event pairs, 17928 based on Foata normal form. 4187/147805 useless extension candidates. Maximal degree in co-relation 1439887. Up to 88053 conditions per place. [2021-12-06 18:19:04,504 INFO L132 encePairwiseOnDemand]: 210/267 looper letters, 2190 selfloop transitions, 1929 changer transitions 4/4289 dead transitions. [2021-12-06 18:19:04,504 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 867 places, 4289 transitions, 79561 flow [2021-12-06 18:19:04,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-06 18:19:04,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-12-06 18:19:04,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 12540 transitions. [2021-12-06 18:19:04,512 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5798307670966847 [2021-12-06 18:19:04,513 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 12540 transitions. [2021-12-06 18:19:04,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 12540 transitions. [2021-12-06 18:19:04,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 18:19:04,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 12540 transitions. [2021-12-06 18:19:04,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 154.8148148148148) internal successors, (12540), 81 states have internal predecessors, (12540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:04,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 267.0) internal successors, (21894), 82 states have internal predecessors, (21894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:04,535 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 267.0) internal successors, (21894), 82 states have internal predecessors, (21894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:19:04,536 INFO L186 Difference]: Start difference. First operand has 787 places, 2610 transitions, 41298 flow. Second operand 81 states and 12540 transitions. [2021-12-06 18:19:04,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 867 places, 4289 transitions, 79561 flow [2021-12-06 18:21:53,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 842 places, 4289 transitions, 76006 flow, removed 1736 selfloop flow, removed 25 redundant places. [2021-12-06 18:21:53,599 INFO L242 Difference]: Finished difference. Result has 870 places, 3789 transitions, 68573 flow [2021-12-06 18:21:53,601 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=39844, PETRI_DIFFERENCE_MINUEND_PLACES=762, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=998, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=68573, PETRI_PLACES=870, PETRI_TRANSITIONS=3789} [2021-12-06 18:21:53,601 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 629 predicate places. [2021-12-06 18:21:53,602 INFO L470 AbstractCegarLoop]: Abstraction has has 870 places, 3789 transitions, 68573 flow [2021-12-06 18:21:53,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 153.11428571428573) internal successors, (10718), 70 states have internal predecessors, (10718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:21:53,603 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 18:21:53,603 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:21:53,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-06 18:21:53,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:21:53,805 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-06 18:21:53,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:21:53,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1603924101, now seen corresponding path program 9 times [2021-12-06 18:21:53,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:21:53,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294926925] [2021-12-06 18:21:53,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:21:53,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:21:53,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:54,846 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:21:54,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:21:54,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294926925] [2021-12-06 18:21:54,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294926925] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:21:54,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067875953] [2021-12-06 18:21:54,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:21:54,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:21:54,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:21:54,847 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:21:54,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5447f9c-4f92-4a1a-a277-c00df3ab8c2f/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 18:21:54,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-06 18:21:54,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:21:54,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-06 18:21:54,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:21:56,314 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 18:21:56,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:21:56,852 INFO L354 Elim1Store]: treesize reduction 12, result has 89.0 percent of original size [2021-12-06 18:21:56,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 109 [2021-12-06 18:21:57,411 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 18:21:57,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067875953] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:21:57,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:21:57,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 9, 10] total 55 [2021-12-06 18:21:57,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323390160] [2021-12-06 18:21:57,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:21:57,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-06 18:21:57,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:21:57,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-06 18:21:57,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2781, Unknown=0, NotChecked=0, Total=2970 [2021-12-06 18:21:57,418 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 267 [2021-12-06 18:21:57,421 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 870 places, 3789 transitions, 68573 flow. Second operand has 55 states, 55 states have (on average 152.1090909090909) internal successors, (8366), 55 states have internal predecessors, (8366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:21:57,421 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 18:21:57,421 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 267 [2021-12-06 18:21:57,421 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand