./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:50:30,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:50:30,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:50:30,842 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:50:30,843 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:50:30,849 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:50:30,851 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:50:30,856 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:50:30,859 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:50:30,866 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:50:30,868 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:50:30,870 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:50:30,871 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:50:30,874 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:50:30,877 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:50:30,882 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:50:30,884 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:50:30,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:50:30,888 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:50:30,897 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:50:30,899 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:50:30,901 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:50:30,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:50:30,905 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:50:30,910 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:50:30,910 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:50:30,911 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:50:30,913 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:50:30,914 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:50:30,915 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:50:30,915 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:50:30,916 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:50:30,917 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:50:30,919 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:50:30,921 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:50:30,921 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:50:30,922 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:50:30,922 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:50:30,922 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:50:30,924 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:50:30,924 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:50:30,925 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 09:50:30,981 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:50:30,982 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:50:30,982 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:50:30,983 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:50:30,984 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:50:30,984 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:50:30,984 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:50:30,985 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:50:30,985 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:50:30,985 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:50:30,986 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:50:30,987 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:50:30,987 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:50:30,987 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:50:30,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:50:30,987 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:50:30,988 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:50:30,988 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:50:30,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:50:30,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:50:30,988 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:50:30,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:50:30,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:50:30,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:50:30,989 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:50:30,990 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:50:30,990 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:50:30,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:50:30,990 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:50:30,992 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:50:30,992 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:50:30,992 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:50:30,993 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_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 [2021-11-09 09:50:31,340 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:50:31,374 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:50:31,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:50:31,378 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:50:31,379 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:50:31,380 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2021-11-09 09:50:31,455 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/data/e54f4b967/d601b3bd04c9408ead50421e87fd147f/FLAGe1b675c8e [2021-11-09 09:50:31,978 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:50:31,978 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2021-11-09 09:50:31,994 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/data/e54f4b967/d601b3bd04c9408ead50421e87fd147f/FLAGe1b675c8e [2021-11-09 09:50:32,309 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/data/e54f4b967/d601b3bd04c9408ead50421e87fd147f [2021-11-09 09:50:32,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:50:32,313 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:50:32,315 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:50:32,315 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:50:32,319 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:50:32,319 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:50:32" (1/1) ... [2021-11-09 09:50:32,321 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a5ddc15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:32, skipping insertion in model container [2021-11-09 09:50:32,321 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:50:32" (1/1) ... [2021-11-09 09:50:32,328 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:50:32,346 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:50:32,551 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c[3056,3069] [2021-11-09 09:50:32,558 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:50:32,567 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:50:32,593 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c[3056,3069] [2021-11-09 09:50:32,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:50:32,615 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:50:32,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:32 WrapperNode [2021-11-09 09:50:32,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:50:32,617 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:50:32,617 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:50:32,617 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:50:32,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:32" (1/1) ... [2021-11-09 09:50:32,634 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:32" (1/1) ... [2021-11-09 09:50:32,662 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:50:32,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:50:32,663 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:50:32,663 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:50:32,672 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:32" (1/1) ... [2021-11-09 09:50:32,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:32" (1/1) ... [2021-11-09 09:50:32,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:32" (1/1) ... [2021-11-09 09:50:32,676 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:32" (1/1) ... [2021-11-09 09:50:32,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:32" (1/1) ... [2021-11-09 09:50:32,690 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:32" (1/1) ... [2021-11-09 09:50:32,692 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:32" (1/1) ... [2021-11-09 09:50:32,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:50:32,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:50:32,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:50:32,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:50:32,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:32" (1/1) ... [2021-11-09 09:50:32,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:50:32,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:50:32,749 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:50:32,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:50:32,792 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-09 09:50:32,792 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-09 09:50:32,793 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-09 09:50:32,793 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-09 09:50:32,793 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-11-09 09:50:32,793 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-11-09 09:50:32,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:50:32,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:50:32,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 09:50:32,794 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-09 09:50:32,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-09 09:50:32,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 09:50:32,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:50:32,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:50:32,800 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 09:50:32,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 09:50:32,802 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-09 09:50:33,494 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:50:33,495 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2021-11-09 09:50:33,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:50:33 BoogieIcfgContainer [2021-11-09 09:50:33,497 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:50:33,499 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:50:33,499 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:50:33,516 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:50:33,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:50:32" (1/3) ... [2021-11-09 09:50:33,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c1de9a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:50:33, skipping insertion in model container [2021-11-09 09:50:33,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:50:32" (2/3) ... [2021-11-09 09:50:33,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c1de9a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:50:33, skipping insertion in model container [2021-11-09 09:50:33,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:50:33" (3/3) ... [2021-11-09 09:50:33,529 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons.wvr.c [2021-11-09 09:50:33,534 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-09 09:50:33,535 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:50:33,535 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 09:50:33,535 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-09 09:50:33,586 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,586 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,587 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,587 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,587 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,587 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,588 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,588 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,588 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,588 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,589 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,589 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,593 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,594 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,594 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,594 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,595 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,595 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,595 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,595 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,596 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,596 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,596 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,596 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,597 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,598 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,599 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,599 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,599 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,599 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,599 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,599 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,599 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,600 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,600 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~temp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,600 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~temp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,600 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,600 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,601 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,601 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,601 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,601 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,601 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,601 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,602 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,602 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,602 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,602 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,602 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~temp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,603 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,603 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,603 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,603 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,603 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~temp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,604 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,604 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,604 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~temp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,604 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~temp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,605 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,605 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,605 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,605 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,606 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,606 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,609 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,610 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,612 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,612 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,612 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,613 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,613 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,613 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,613 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,613 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,614 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,615 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,616 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,616 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,616 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~temp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,616 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,616 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,617 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,617 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 09:50:33,626 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-11-09 09:50:33,686 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:50:33,693 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 09:50:33,693 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-09 09:50:33,715 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 141 places, 142 transitions, 308 flow [2021-11-09 09:50:33,805 INFO L129 PetriNetUnfolder]: 11/139 cut-off events. [2021-11-09 09:50:33,806 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-11-09 09:50:33,811 INFO L84 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 139 events. 11/139 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 85 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 111. Up to 3 conditions per place. [2021-11-09 09:50:33,811 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 142 transitions, 308 flow [2021-11-09 09:50:33,818 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 129 transitions, 276 flow [2021-11-09 09:50:33,896 INFO L129 PetriNetUnfolder]: 11/128 cut-off events. [2021-11-09 09:50:33,896 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-11-09 09:50:33,896 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:50:33,897 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] [2021-11-09 09:50:33,898 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-09 09:50:33,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:33,907 INFO L85 PathProgramCache]: Analyzing trace with hash -480053002, now seen corresponding path program 1 times [2021-11-09 09:50:33,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:33,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404417093] [2021-11-09 09:50:33,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:33,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:34,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:34,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:34,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:34,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404417093] [2021-11-09 09:50:34,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404417093] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:50:34,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:50:34,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:50:34,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079795627] [2021-11-09 09:50:34,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:50:34,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:34,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:50:34,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:50:34,349 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 142 [2021-11-09 09:50:34,356 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 129 transitions, 276 flow. Second operand has 4 states, 4 states have (on average 125.75) internal successors, (503), 4 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:34,356 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:50:34,356 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 142 [2021-11-09 09:50:34,358 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:50:34,531 INFO L129 PetriNetUnfolder]: 31/189 cut-off events. [2021-11-09 09:50:34,531 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-11-09 09:50:34,533 INFO L84 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 189 events. 31/189 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 373 event pairs, 1 based on Foata normal form. 23/194 useless extension candidates. Maximal degree in co-relation 156. Up to 23 conditions per place. [2021-11-09 09:50:34,536 INFO L132 encePairwiseOnDemand]: 130/142 looper letters, 14 selfloop transitions, 5 changer transitions 4/131 dead transitions. [2021-11-09 09:50:34,536 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 131 transitions, 318 flow [2021-11-09 09:50:34,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:50:34,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-11-09 09:50:34,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 653 transitions. [2021-11-09 09:50:34,559 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9197183098591549 [2021-11-09 09:50:34,559 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 653 transitions. [2021-11-09 09:50:34,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 653 transitions. [2021-11-09 09:50:34,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:50:34,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 653 transitions. [2021-11-09 09:50:34,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 130.6) internal successors, (653), 5 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:34,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:34,595 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:34,597 INFO L186 Difference]: Start difference. First operand has 128 places, 129 transitions, 276 flow. Second operand 5 states and 653 transitions. [2021-11-09 09:50:34,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 131 transitions, 318 flow [2021-11-09 09:50:34,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 131 transitions, 306 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-11-09 09:50:34,613 INFO L242 Difference]: Finished difference. Result has 129 places, 121 transitions, 273 flow [2021-11-09 09:50:34,616 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=273, PETRI_PLACES=129, PETRI_TRANSITIONS=121} [2021-11-09 09:50:34,617 INFO L334 CegarLoopForPetriNet]: 128 programPoint places, 1 predicate places. [2021-11-09 09:50:34,617 INFO L470 AbstractCegarLoop]: Abstraction has has 129 places, 121 transitions, 273 flow [2021-11-09 09:50:34,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 125.75) internal successors, (503), 4 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:34,618 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:50:34,619 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] [2021-11-09 09:50:34,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:50:34,619 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-09 09:50:34,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:34,621 INFO L85 PathProgramCache]: Analyzing trace with hash -582815880, now seen corresponding path program 2 times [2021-11-09 09:50:34,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:34,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784357321] [2021-11-09 09:50:34,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:34,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:34,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:35,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:35,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:35,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784357321] [2021-11-09 09:50:35,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784357321] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:50:35,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:50:35,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-09 09:50:35,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243561008] [2021-11-09 09:50:35,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 09:50:35,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:35,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 09:50:35,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:50:35,105 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 142 [2021-11-09 09:50:35,107 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 121 transitions, 273 flow. Second operand has 9 states, 9 states have (on average 102.88888888888889) internal successors, (926), 9 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:35,107 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:50:35,107 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 142 [2021-11-09 09:50:35,107 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:50:35,381 INFO L129 PetriNetUnfolder]: 72/314 cut-off events. [2021-11-09 09:50:35,381 INFO L130 PetriNetUnfolder]: For 57/68 co-relation queries the response was YES. [2021-11-09 09:50:35,384 INFO L84 FinitePrefix]: Finished finitePrefix Result has 552 conditions, 314 events. 72/314 cut-off events. For 57/68 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1184 event pairs, 9 based on Foata normal form. 7/302 useless extension candidates. Maximal degree in co-relation 403. Up to 67 conditions per place. [2021-11-09 09:50:35,387 INFO L132 encePairwiseOnDemand]: 131/142 looper letters, 41 selfloop transitions, 13 changer transitions 0/142 dead transitions. [2021-11-09 09:50:35,388 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 142 transitions, 432 flow [2021-11-09 09:50:35,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 09:50:35,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-09 09:50:35,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1054 transitions. [2021-11-09 09:50:35,394 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7422535211267606 [2021-11-09 09:50:35,395 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1054 transitions. [2021-11-09 09:50:35,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1054 transitions. [2021-11-09 09:50:35,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:50:35,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1054 transitions. [2021-11-09 09:50:35,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 105.4) internal successors, (1054), 10 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:35,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 142.0) internal successors, (1562), 11 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:35,423 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 142.0) internal successors, (1562), 11 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:35,423 INFO L186 Difference]: Start difference. First operand has 129 places, 121 transitions, 273 flow. Second operand 10 states and 1054 transitions. [2021-11-09 09:50:35,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 142 transitions, 432 flow [2021-11-09 09:50:35,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 142 transitions, 428 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-11-09 09:50:35,430 INFO L242 Difference]: Finished difference. Result has 137 places, 127 transitions, 338 flow [2021-11-09 09:50:35,431 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=338, PETRI_PLACES=137, PETRI_TRANSITIONS=127} [2021-11-09 09:50:35,431 INFO L334 CegarLoopForPetriNet]: 128 programPoint places, 9 predicate places. [2021-11-09 09:50:35,432 INFO L470 AbstractCegarLoop]: Abstraction has has 137 places, 127 transitions, 338 flow [2021-11-09 09:50:35,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 102.88888888888889) internal successors, (926), 9 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:35,433 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:50:35,433 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:50:35,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 09:50:35,434 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-09 09:50:35,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:35,435 INFO L85 PathProgramCache]: Analyzing trace with hash 598896823, now seen corresponding path program 1 times [2021-11-09 09:50:35,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:35,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761276926] [2021-11-09 09:50:35,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:35,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:35,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:35,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:35,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:35,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761276926] [2021-11-09 09:50:35,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761276926] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:50:35,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:50:35,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:50:35,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110687553] [2021-11-09 09:50:35,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:50:35,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:35,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:50:35,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:50:35,577 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 142 [2021-11-09 09:50:35,578 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 127 transitions, 338 flow. Second operand has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:35,578 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:50:35,578 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 142 [2021-11-09 09:50:35,578 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:50:35,632 INFO L129 PetriNetUnfolder]: 13/161 cut-off events. [2021-11-09 09:50:35,632 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2021-11-09 09:50:35,634 INFO L84 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 161 events. 13/161 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 239 event pairs, 0 based on Foata normal form. 2/157 useless extension candidates. Maximal degree in co-relation 198. Up to 16 conditions per place. [2021-11-09 09:50:35,636 INFO L132 encePairwiseOnDemand]: 137/142 looper letters, 6 selfloop transitions, 4 changer transitions 0/128 dead transitions. [2021-11-09 09:50:35,636 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 128 transitions, 360 flow [2021-11-09 09:50:35,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:50:35,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-11-09 09:50:35,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 386 transitions. [2021-11-09 09:50:35,639 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9061032863849765 [2021-11-09 09:50:35,640 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 386 transitions. [2021-11-09 09:50:35,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 386 transitions. [2021-11-09 09:50:35,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:50:35,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 386 transitions. [2021-11-09 09:50:35,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:35,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:35,645 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:35,645 INFO L186 Difference]: Start difference. First operand has 137 places, 127 transitions, 338 flow. Second operand 3 states and 386 transitions. [2021-11-09 09:50:35,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 128 transitions, 360 flow [2021-11-09 09:50:35,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 128 transitions, 347 flow, removed 1 selfloop flow, removed 4 redundant places. [2021-11-09 09:50:35,658 INFO L242 Difference]: Finished difference. Result has 136 places, 128 transitions, 343 flow [2021-11-09 09:50:35,659 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=343, PETRI_PLACES=136, PETRI_TRANSITIONS=128} [2021-11-09 09:50:35,659 INFO L334 CegarLoopForPetriNet]: 128 programPoint places, 8 predicate places. [2021-11-09 09:50:35,659 INFO L470 AbstractCegarLoop]: Abstraction has has 136 places, 128 transitions, 343 flow [2021-11-09 09:50:35,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:35,660 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:50:35,661 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] [2021-11-09 09:50:35,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 09:50:35,662 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-09 09:50:35,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:35,662 INFO L85 PathProgramCache]: Analyzing trace with hash 907995908, now seen corresponding path program 1 times [2021-11-09 09:50:35,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:35,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436565398] [2021-11-09 09:50:35,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:35,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:35,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:35,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:50:35,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:35,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436565398] [2021-11-09 09:50:35,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436565398] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:50:35,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:50:35,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 09:50:35,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867746828] [2021-11-09 09:50:35,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:50:35,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:35,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:50:35,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:50:35,842 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 142 [2021-11-09 09:50:35,844 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 128 transitions, 343 flow. Second operand has 6 states, 6 states have (on average 120.0) internal successors, (720), 6 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:35,847 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:50:35,847 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 142 [2021-11-09 09:50:35,848 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:50:35,986 INFO L129 PetriNetUnfolder]: 14/217 cut-off events. [2021-11-09 09:50:35,986 INFO L130 PetriNetUnfolder]: For 36/38 co-relation queries the response was YES. [2021-11-09 09:50:35,988 INFO L84 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 217 events. 14/217 cut-off events. For 36/38 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 466 event pairs, 0 based on Foata normal form. 1/209 useless extension candidates. Maximal degree in co-relation 284. Up to 22 conditions per place. [2021-11-09 09:50:35,989 INFO L132 encePairwiseOnDemand]: 134/142 looper letters, 15 selfloop transitions, 6 changer transitions 1/133 dead transitions. [2021-11-09 09:50:35,990 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 133 transitions, 397 flow [2021-11-09 09:50:35,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:50:35,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-09 09:50:35,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 848 transitions. [2021-11-09 09:50:35,994 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8531187122736419 [2021-11-09 09:50:35,995 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 848 transitions. [2021-11-09 09:50:35,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 848 transitions. [2021-11-09 09:50:35,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:50:35,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 848 transitions. [2021-11-09 09:50:36,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 121.14285714285714) internal successors, (848), 7 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:36,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 142.0) internal successors, (1136), 8 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:36,006 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 142.0) internal successors, (1136), 8 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:36,006 INFO L186 Difference]: Start difference. First operand has 136 places, 128 transitions, 343 flow. Second operand 7 states and 848 transitions. [2021-11-09 09:50:36,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 133 transitions, 397 flow [2021-11-09 09:50:36,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 133 transitions, 393 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-11-09 09:50:36,018 INFO L242 Difference]: Finished difference. Result has 143 places, 129 transitions, 361 flow [2021-11-09 09:50:36,019 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=361, PETRI_PLACES=143, PETRI_TRANSITIONS=129} [2021-11-09 09:50:36,019 INFO L334 CegarLoopForPetriNet]: 128 programPoint places, 15 predicate places. [2021-11-09 09:50:36,020 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 129 transitions, 361 flow [2021-11-09 09:50:36,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 120.0) internal successors, (720), 6 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:36,020 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:50:36,021 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] [2021-11-09 09:50:36,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 09:50:36,021 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-09 09:50:36,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:36,022 INFO L85 PathProgramCache]: Analyzing trace with hash -247441697, now seen corresponding path program 1 times [2021-11-09 09:50:36,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:36,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216105033] [2021-11-09 09:50:36,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:36,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:36,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:37,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:37,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:37,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216105033] [2021-11-09 09:50:37,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216105033] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:50:37,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421752476] [2021-11-09 09:50:37,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:37,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:50:37,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:50:37,279 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:50:37,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:50:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:37,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-09 09:50:37,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:50:39,615 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 25 treesize of output 13 [2021-11-09 09:50:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:39,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421752476] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:50:39,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:50:39,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 44 [2021-11-09 09:50:39,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743485466] [2021-11-09 09:50:39,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-09 09:50:39,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:39,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-09 09:50:39,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1677, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 09:50:39,925 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 142 [2021-11-09 09:50:39,933 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 129 transitions, 361 flow. Second operand has 44 states, 44 states have (on average 76.45454545454545) internal successors, (3364), 44 states have internal predecessors, (3364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:39,934 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:50:39,934 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 142 [2021-11-09 09:50:39,934 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:50:46,544 INFO L129 PetriNetUnfolder]: 4167/8364 cut-off events. [2021-11-09 09:50:46,544 INFO L130 PetriNetUnfolder]: For 4303/4303 co-relation queries the response was YES. [2021-11-09 09:50:46,593 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19167 conditions, 8364 events. 4167/8364 cut-off events. For 4303/4303 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 72283 event pairs, 219 based on Foata normal form. 26/7736 useless extension candidates. Maximal degree in co-relation 19060. Up to 940 conditions per place. [2021-11-09 09:50:46,637 INFO L132 encePairwiseOnDemand]: 110/142 looper letters, 303 selfloop transitions, 92 changer transitions 223/676 dead transitions. [2021-11-09 09:50:46,640 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 676 transitions, 3200 flow [2021-11-09 09:50:46,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-09 09:50:46,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-11-09 09:50:46,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 5917 transitions. [2021-11-09 09:50:46,666 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5787363067292645 [2021-11-09 09:50:46,666 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 5917 transitions. [2021-11-09 09:50:46,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 5917 transitions. [2021-11-09 09:50:46,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:50:46,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 5917 transitions. [2021-11-09 09:50:46,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 82.18055555555556) internal successors, (5917), 72 states have internal predecessors, (5917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:46,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 142.0) internal successors, (10366), 73 states have internal predecessors, (10366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:46,733 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 142.0) internal successors, (10366), 73 states have internal predecessors, (10366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:46,733 INFO L186 Difference]: Start difference. First operand has 143 places, 129 transitions, 361 flow. Second operand 72 states and 5917 transitions. [2021-11-09 09:50:46,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 676 transitions, 3200 flow [2021-11-09 09:50:46,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 676 transitions, 3174 flow, removed 8 selfloop flow, removed 5 redundant places. [2021-11-09 09:50:46,868 INFO L242 Difference]: Finished difference. Result has 254 places, 200 transitions, 1087 flow [2021-11-09 09:50:46,869 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=1087, PETRI_PLACES=254, PETRI_TRANSITIONS=200} [2021-11-09 09:50:46,869 INFO L334 CegarLoopForPetriNet]: 128 programPoint places, 126 predicate places. [2021-11-09 09:50:46,870 INFO L470 AbstractCegarLoop]: Abstraction has has 254 places, 200 transitions, 1087 flow [2021-11-09 09:50:46,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 76.45454545454545) internal successors, (3364), 44 states have internal predecessors, (3364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:46,872 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:50:46,872 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] [2021-11-09 09:50:46,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:50:47,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:50:47,086 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-09 09:50:47,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:47,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1029529983, now seen corresponding path program 2 times [2021-11-09 09:50:47,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:47,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298946991] [2021-11-09 09:50:47,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:47,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:47,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:48,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:48,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:48,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298946991] [2021-11-09 09:50:48,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298946991] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:50:48,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150230076] [2021-11-09 09:50:48,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:50:48,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:50:48,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:50:48,181 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:50:48,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:50:48,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:50:48,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:50:48,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-09 09:50:48,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:50:48,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:50:48,998 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 09:50:48,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 09:50:50,586 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-09 09:50:50,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-11-09 09:50:50,903 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 25 treesize of output 13 [2021-11-09 09:50:51,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:51,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150230076] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:50:51,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:50:51,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 27] total 48 [2021-11-09 09:50:51,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597010335] [2021-11-09 09:50:51,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-09 09:50:51,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:51,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-09 09:50:51,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=2034, Unknown=0, NotChecked=0, Total=2256 [2021-11-09 09:50:51,126 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 142 [2021-11-09 09:50:51,130 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 200 transitions, 1087 flow. Second operand has 48 states, 48 states have (on average 64.58333333333333) internal successors, (3100), 48 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:51,131 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:50:51,131 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 142 [2021-11-09 09:50:51,131 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:50:58,679 INFO L129 PetriNetUnfolder]: 4929/9645 cut-off events. [2021-11-09 09:50:58,679 INFO L130 PetriNetUnfolder]: For 84710/84913 co-relation queries the response was YES. [2021-11-09 09:50:58,821 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41570 conditions, 9645 events. 4929/9645 cut-off events. For 84710/84913 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 83074 event pairs, 715 based on Foata normal form. 51/9058 useless extension candidates. Maximal degree in co-relation 38798. Up to 1227 conditions per place. [2021-11-09 09:50:58,884 INFO L132 encePairwiseOnDemand]: 108/142 looper letters, 318 selfloop transitions, 98 changer transitions 97/563 dead transitions. [2021-11-09 09:50:58,884 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 563 transitions, 4908 flow [2021-11-09 09:50:58,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-09 09:50:58,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-11-09 09:50:58,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3831 transitions. [2021-11-09 09:50:58,898 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.49960876369327073 [2021-11-09 09:50:58,898 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3831 transitions. [2021-11-09 09:50:58,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3831 transitions. [2021-11-09 09:50:58,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:50:58,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3831 transitions. [2021-11-09 09:50:58,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 70.94444444444444) internal successors, (3831), 54 states have internal predecessors, (3831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:58,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 142.0) internal successors, (7810), 55 states have internal predecessors, (7810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:58,932 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 142.0) internal successors, (7810), 55 states have internal predecessors, (7810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:58,933 INFO L186 Difference]: Start difference. First operand has 254 places, 200 transitions, 1087 flow. Second operand 54 states and 3831 transitions. [2021-11-09 09:50:58,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 563 transitions, 4908 flow [2021-11-09 09:50:59,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 563 transitions, 4145 flow, removed 335 selfloop flow, removed 26 redundant places. [2021-11-09 09:50:59,424 INFO L242 Difference]: Finished difference. Result has 268 places, 209 transitions, 1277 flow [2021-11-09 09:50:59,425 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=972, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=1277, PETRI_PLACES=268, PETRI_TRANSITIONS=209} [2021-11-09 09:50:59,425 INFO L334 CegarLoopForPetriNet]: 128 programPoint places, 140 predicate places. [2021-11-09 09:50:59,425 INFO L470 AbstractCegarLoop]: Abstraction has has 268 places, 209 transitions, 1277 flow [2021-11-09 09:50:59,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 64.58333333333333) internal successors, (3100), 48 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:50:59,427 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:50:59,428 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] [2021-11-09 09:50:59,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-09 09:50:59,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:50:59,642 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-09 09:50:59,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:59,642 INFO L85 PathProgramCache]: Analyzing trace with hash 615138795, now seen corresponding path program 3 times [2021-11-09 09:50:59,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:59,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117877731] [2021-11-09 09:50:59,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:59,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:59,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:01,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:51:01,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:01,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117877731] [2021-11-09 09:51:01,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117877731] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:01,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899340187] [2021-11-09 09:51:01,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:51:01,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:01,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:01,019 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:01,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:51:01,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-09 09:51:01,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:51:01,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-09 09:51:01,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:02,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 09:51:03,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 09:51:04,158 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-09 09:51:04,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-09 09:51:04,396 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-09 09:51:04,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-09 09:51:04,648 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 29 treesize of output 13 [2021-11-09 09:51:04,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:51:04,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899340187] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:04,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:51:04,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 31] total 53 [2021-11-09 09:51:04,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75532645] [2021-11-09 09:51:04,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-09 09:51:04,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:04,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-09 09:51:04,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=2503, Unknown=0, NotChecked=0, Total=2756 [2021-11-09 09:51:04,894 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 142 [2021-11-09 09:51:04,900 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 209 transitions, 1277 flow. Second operand has 53 states, 53 states have (on average 62.339622641509436) internal successors, (3304), 53 states have internal predecessors, (3304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:04,900 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:51:04,900 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 142 [2021-11-09 09:51:04,901 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:51:12,164 INFO L129 PetriNetUnfolder]: 2908/5505 cut-off events. [2021-11-09 09:51:12,165 INFO L130 PetriNetUnfolder]: For 29677/29775 co-relation queries the response was YES. [2021-11-09 09:51:12,226 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22283 conditions, 5505 events. 2908/5505 cut-off events. For 29677/29775 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 41702 event pairs, 241 based on Foata normal form. 30/5397 useless extension candidates. Maximal degree in co-relation 21947. Up to 1106 conditions per place. [2021-11-09 09:51:12,270 INFO L132 encePairwiseOnDemand]: 108/142 looper letters, 270 selfloop transitions, 104 changer transitions 13/437 dead transitions. [2021-11-09 09:51:12,270 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 437 transitions, 3521 flow [2021-11-09 09:51:12,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-09 09:51:12,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-11-09 09:51:12,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3158 transitions. [2021-11-09 09:51:12,279 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4731795025471981 [2021-11-09 09:51:12,279 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3158 transitions. [2021-11-09 09:51:12,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3158 transitions. [2021-11-09 09:51:12,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:51:12,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3158 transitions. [2021-11-09 09:51:12,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 67.19148936170212) internal successors, (3158), 47 states have internal predecessors, (3158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:12,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 142.0) internal successors, (6816), 48 states have internal predecessors, (6816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:12,304 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 142.0) internal successors, (6816), 48 states have internal predecessors, (6816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:12,304 INFO L186 Difference]: Start difference. First operand has 268 places, 209 transitions, 1277 flow. Second operand 47 states and 3158 transitions. [2021-11-09 09:51:12,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 437 transitions, 3521 flow [2021-11-09 09:51:12,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 437 transitions, 3289 flow, removed 22 selfloop flow, removed 46 redundant places. [2021-11-09 09:51:12,533 INFO L242 Difference]: Finished difference. Result has 263 places, 216 transitions, 1424 flow [2021-11-09 09:51:12,534 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1064, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=1424, PETRI_PLACES=263, PETRI_TRANSITIONS=216} [2021-11-09 09:51:12,534 INFO L334 CegarLoopForPetriNet]: 128 programPoint places, 135 predicate places. [2021-11-09 09:51:12,535 INFO L470 AbstractCegarLoop]: Abstraction has has 263 places, 216 transitions, 1424 flow [2021-11-09 09:51:12,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 62.339622641509436) internal successors, (3304), 53 states have internal predecessors, (3304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:12,538 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:51:12,539 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:12,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:51:12,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-09 09:51:12,766 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-09 09:51:12,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:12,766 INFO L85 PathProgramCache]: Analyzing trace with hash 634812200, now seen corresponding path program 4 times [2021-11-09 09:51:12,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:12,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325468007] [2021-11-09 09:51:12,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:12,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:12,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:12,900 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:51:12,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:12,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325468007] [2021-11-09 09:51:12,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325468007] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:12,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22644262] [2021-11-09 09:51:12,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:51:12,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:12,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:12,904 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:12,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 09:51:13,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:51:13,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:51:13,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 09:51:13,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:14,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:51:14,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22644262] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:14,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:51:14,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 11] total 12 [2021-11-09 09:51:14,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646667374] [2021-11-09 09:51:14,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 09:51:14,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:14,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 09:51:14,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:51:14,270 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 142 [2021-11-09 09:51:14,271 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 216 transitions, 1424 flow. Second operand has 12 states, 12 states have (on average 116.16666666666667) internal successors, (1394), 12 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:14,271 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:51:14,271 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 142 [2021-11-09 09:51:14,271 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:51:14,611 INFO L129 PetriNetUnfolder]: 205/1115 cut-off events. [2021-11-09 09:51:14,611 INFO L130 PetriNetUnfolder]: For 6880/6935 co-relation queries the response was YES. [2021-11-09 09:51:14,624 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3743 conditions, 1115 events. 205/1115 cut-off events. For 6880/6935 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 7737 event pairs, 73 based on Foata normal form. 38/1137 useless extension candidates. Maximal degree in co-relation 3576. Up to 186 conditions per place. [2021-11-09 09:51:14,629 INFO L132 encePairwiseOnDemand]: 132/142 looper letters, 22 selfloop transitions, 13 changer transitions 88/223 dead transitions. [2021-11-09 09:51:14,630 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 223 transitions, 1598 flow [2021-11-09 09:51:14,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 09:51:14,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-11-09 09:51:14,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1510 transitions. [2021-11-09 09:51:14,633 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8179848320693391 [2021-11-09 09:51:14,634 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1510 transitions. [2021-11-09 09:51:14,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1510 transitions. [2021-11-09 09:51:14,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:51:14,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1510 transitions. [2021-11-09 09:51:14,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 116.15384615384616) internal successors, (1510), 13 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:14,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 142.0) internal successors, (1988), 14 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:14,642 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 142.0) internal successors, (1988), 14 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:14,643 INFO L186 Difference]: Start difference. First operand has 263 places, 216 transitions, 1424 flow. Second operand 13 states and 1510 transitions. [2021-11-09 09:51:14,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 223 transitions, 1598 flow [2021-11-09 09:51:14,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 223 transitions, 1439 flow, removed 14 selfloop flow, removed 41 redundant places. [2021-11-09 09:51:14,715 INFO L242 Difference]: Finished difference. Result has 237 places, 130 transitions, 515 flow [2021-11-09 09:51:14,716 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1233, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=515, PETRI_PLACES=237, PETRI_TRANSITIONS=130} [2021-11-09 09:51:14,716 INFO L334 CegarLoopForPetriNet]: 128 programPoint places, 109 predicate places. [2021-11-09 09:51:14,717 INFO L470 AbstractCegarLoop]: Abstraction has has 237 places, 130 transitions, 515 flow [2021-11-09 09:51:14,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 116.16666666666667) internal successors, (1394), 12 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:14,718 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:51:14,718 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] [2021-11-09 09:51:14,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 09:51:14,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-09 09:51:14,934 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-09 09:51:14,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:14,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1194711812, now seen corresponding path program 5 times [2021-11-09 09:51:14,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:14,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113520162] [2021-11-09 09:51:14,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:14,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:15,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:16,871 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:51:16,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:16,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113520162] [2021-11-09 09:51:16,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113520162] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:16,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415505258] [2021-11-09 09:51:16,872 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:51:16,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:16,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:16,876 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:16,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 09:51:17,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-09 09:51:17,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:51:17,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-09 09:51:17,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:17,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:51:18,072 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 09:51:18,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 09:51:19,299 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-09 09:51:19,299 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 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-09 09:51:19,586 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-09 09:51:19,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-11-09 09:51:19,644 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 [2021-11-09 09:51:19,851 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 09:51:19,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415505258] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:19,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:51:19,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23] total 47 [2021-11-09 09:51:19,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196882310] [2021-11-09 09:51:19,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-09 09:51:19,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:19,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-09 09:51:19,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1936, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 09:51:19,859 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 142 [2021-11-09 09:51:19,863 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 130 transitions, 515 flow. Second operand has 47 states, 47 states have (on average 64.68085106382979) internal successors, (3040), 47 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:19,863 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:51:19,863 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 142 [2021-11-09 09:51:19,863 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:51:26,352 INFO L129 PetriNetUnfolder]: 3043/6006 cut-off events. [2021-11-09 09:51:26,353 INFO L130 PetriNetUnfolder]: For 46539/46597 co-relation queries the response was YES. [2021-11-09 09:51:26,387 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24547 conditions, 6006 events. 3043/6006 cut-off events. For 46539/46597 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 45684 event pairs, 109 based on Foata normal form. 78/6028 useless extension candidates. Maximal degree in co-relation 24230. Up to 1305 conditions per place. [2021-11-09 09:51:26,428 INFO L132 encePairwiseOnDemand]: 112/142 looper letters, 215 selfloop transitions, 57 changer transitions 12/335 dead transitions. [2021-11-09 09:51:26,428 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 335 transitions, 2719 flow [2021-11-09 09:51:26,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-09 09:51:26,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-11-09 09:51:26,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3240 transitions. [2021-11-09 09:51:26,435 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4753521126760563 [2021-11-09 09:51:26,436 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3240 transitions. [2021-11-09 09:51:26,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3240 transitions. [2021-11-09 09:51:26,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:51:26,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3240 transitions. [2021-11-09 09:51:26,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 67.5) internal successors, (3240), 48 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:26,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 142.0) internal successors, (6958), 49 states have internal predecessors, (6958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:26,457 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 142.0) internal successors, (6958), 49 states have internal predecessors, (6958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:26,457 INFO L186 Difference]: Start difference. First operand has 237 places, 130 transitions, 515 flow. Second operand 48 states and 3240 transitions. [2021-11-09 09:51:26,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 335 transitions, 2719 flow [2021-11-09 09:51:26,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 335 transitions, 1950 flow, removed 376 selfloop flow, removed 35 redundant places. [2021-11-09 09:51:26,559 INFO L242 Difference]: Finished difference. Result has 204 places, 160 transitions, 727 flow [2021-11-09 09:51:26,560 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=727, PETRI_PLACES=204, PETRI_TRANSITIONS=160} [2021-11-09 09:51:26,560 INFO L334 CegarLoopForPetriNet]: 128 programPoint places, 76 predicate places. [2021-11-09 09:51:26,560 INFO L470 AbstractCegarLoop]: Abstraction has has 204 places, 160 transitions, 727 flow [2021-11-09 09:51:26,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 64.68085106382979) internal successors, (3040), 47 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:26,562 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:51:26,562 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] [2021-11-09 09:51:26,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 09:51:26,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:26,776 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-09 09:51:26,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:26,777 INFO L85 PathProgramCache]: Analyzing trace with hash 2085204896, now seen corresponding path program 6 times [2021-11-09 09:51:26,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:26,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153157299] [2021-11-09 09:51:26,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:26,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:26,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:28,108 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:51:28,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:28,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153157299] [2021-11-09 09:51:28,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153157299] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:28,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063020743] [2021-11-09 09:51:28,109 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:51:28,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:28,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:28,110 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:28,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 09:51:28,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-09 09:51:28,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:51:28,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-09 09:51:28,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:30,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 09:51:31,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 09:51:31,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 09:51:31,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 09:51:33,349 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-11-09 09:51:33,349 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 50 treesize of output 25 [2021-11-09 09:51:33,557 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:51:33,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063020743] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:33,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:51:33,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 38] total 64 [2021-11-09 09:51:33,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127434194] [2021-11-09 09:51:33,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-09 09:51:33,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:33,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-09 09:51:33,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=3730, Unknown=0, NotChecked=0, Total=4032 [2021-11-09 09:51:33,565 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 142 [2021-11-09 09:51:33,569 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 160 transitions, 727 flow. Second operand has 64 states, 64 states have (on average 61.46875) internal successors, (3934), 64 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:33,569 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:51:33,569 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 142 [2021-11-09 09:51:33,569 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:51:44,174 INFO L129 PetriNetUnfolder]: 7857/14544 cut-off events. [2021-11-09 09:51:44,174 INFO L130 PetriNetUnfolder]: For 41981/42179 co-relation queries the response was YES. [2021-11-09 09:51:44,249 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48767 conditions, 14544 events. 7857/14544 cut-off events. For 41981/42179 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 120397 event pairs, 693 based on Foata normal form. 34/13864 useless extension candidates. Maximal degree in co-relation 44447. Up to 2935 conditions per place. [2021-11-09 09:51:44,309 INFO L132 encePairwiseOnDemand]: 104/142 looper letters, 366 selfloop transitions, 114 changer transitions 32/561 dead transitions. [2021-11-09 09:51:44,309 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 561 transitions, 3875 flow [2021-11-09 09:51:44,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-09 09:51:44,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-11-09 09:51:44,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 4133 transitions. [2021-11-09 09:51:44,319 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4694457064970468 [2021-11-09 09:51:44,319 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 4133 transitions. [2021-11-09 09:51:44,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 4133 transitions. [2021-11-09 09:51:44,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:51:44,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 4133 transitions. [2021-11-09 09:51:44,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 66.66129032258064) internal successors, (4133), 62 states have internal predecessors, (4133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:44,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 142.0) internal successors, (8946), 63 states have internal predecessors, (8946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:44,348 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 142.0) internal successors, (8946), 63 states have internal predecessors, (8946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:44,348 INFO L186 Difference]: Start difference. First operand has 204 places, 160 transitions, 727 flow. Second operand 62 states and 4133 transitions. [2021-11-09 09:51:44,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 561 transitions, 3875 flow [2021-11-09 09:51:44,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 561 transitions, 3747 flow, removed 16 selfloop flow, removed 23 redundant places. [2021-11-09 09:51:44,487 INFO L242 Difference]: Finished difference. Result has 263 places, 232 transitions, 1650 flow [2021-11-09 09:51:44,488 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=637, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=1650, PETRI_PLACES=263, PETRI_TRANSITIONS=232} [2021-11-09 09:51:44,488 INFO L334 CegarLoopForPetriNet]: 128 programPoint places, 135 predicate places. [2021-11-09 09:51:44,488 INFO L470 AbstractCegarLoop]: Abstraction has has 263 places, 232 transitions, 1650 flow [2021-11-09 09:51:44,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 61.46875) internal successors, (3934), 64 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:44,490 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:51:44,490 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] [2021-11-09 09:51:44,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 09:51:44,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:44,706 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-09 09:51:44,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:44,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1214836712, now seen corresponding path program 7 times [2021-11-09 09:51:44,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:44,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170868722] [2021-11-09 09:51:44,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:44,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:44,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:46,415 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:51:46,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:46,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170868722] [2021-11-09 09:51:46,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170868722] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:46,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093079024] [2021-11-09 09:51:46,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:51:46,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:46,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:46,417 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:46,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 09:51:47,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:47,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-09 09:51:47,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:47,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:51:48,350 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 09:51:48,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 09:51:49,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 09:51:49,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 09:51:50,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 09:51:51,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:51:51,285 INFO L354 Elim1Store]: treesize reduction 75, result has 24.2 percent of original size [2021-11-09 09:51:51,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2021-11-09 09:51:51,889 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-09 09:51:51,890 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 47 treesize of output 19 [2021-11-09 09:51:52,089 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:51:52,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093079024] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:52,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:51:52,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 38] total 67 [2021-11-09 09:51:52,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832209214] [2021-11-09 09:51:52,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-09 09:51:52,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:52,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-09 09:51:52,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=4142, Unknown=0, NotChecked=0, Total=4422 [2021-11-09 09:51:52,096 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 142 [2021-11-09 09:51:52,099 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 232 transitions, 1650 flow. Second operand has 67 states, 67 states have (on average 60.37313432835821) internal successors, (4045), 67 states have internal predecessors, (4045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:51:52,099 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:51:52,099 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 142 [2021-11-09 09:51:52,100 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:52:15,450 INFO L129 PetriNetUnfolder]: 8900/16352 cut-off events. [2021-11-09 09:52:15,451 INFO L130 PetriNetUnfolder]: For 325849/327227 co-relation queries the response was YES. [2021-11-09 09:52:15,585 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91095 conditions, 16352 events. 8900/16352 cut-off events. For 325849/327227 co-relation queries the response was YES. Maximal size of possible extension queue 731. Compared 138395 event pairs, 794 based on Foata normal form. 136/16215 useless extension candidates. Maximal degree in co-relation 83850. Up to 3296 conditions per place. [2021-11-09 09:52:15,698 INFO L132 encePairwiseOnDemand]: 103/142 looper letters, 631 selfloop transitions, 304 changer transitions 30/1013 dead transitions. [2021-11-09 09:52:15,698 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 1013 transitions, 12005 flow [2021-11-09 09:52:15,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-11-09 09:52:15,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2021-11-09 09:52:15,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 6802 transitions. [2021-11-09 09:52:15,711 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4650622179680022 [2021-11-09 09:52:15,712 INFO L72 ComplementDD]: Start complementDD. Operand 103 states and 6802 transitions. [2021-11-09 09:52:15,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 103 states and 6802 transitions. [2021-11-09 09:52:15,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:52:15,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 103 states and 6802 transitions. [2021-11-09 09:52:15,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 104 states, 103 states have (on average 66.03883495145631) internal successors, (6802), 103 states have internal predecessors, (6802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:15,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 104 states, 104 states have (on average 142.0) internal successors, (14768), 104 states have internal predecessors, (14768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:15,755 INFO L81 ComplementDD]: Finished complementDD. Result has 104 states, 104 states have (on average 142.0) internal successors, (14768), 104 states have internal predecessors, (14768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:15,755 INFO L186 Difference]: Start difference. First operand has 263 places, 232 transitions, 1650 flow. Second operand 103 states and 6802 transitions. [2021-11-09 09:52:15,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 1013 transitions, 12005 flow [2021-11-09 09:52:16,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 1013 transitions, 11497 flow, removed 110 selfloop flow, removed 39 redundant places. [2021-11-09 09:52:16,311 INFO L242 Difference]: Finished difference. Result has 394 places, 445 transitions, 4787 flow [2021-11-09 09:52:16,312 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1329, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=103, PETRI_FLOW=4787, PETRI_PLACES=394, PETRI_TRANSITIONS=445} [2021-11-09 09:52:16,312 INFO L334 CegarLoopForPetriNet]: 128 programPoint places, 266 predicate places. [2021-11-09 09:52:16,312 INFO L470 AbstractCegarLoop]: Abstraction has has 394 places, 445 transitions, 4787 flow [2021-11-09 09:52:16,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 60.37313432835821) internal successors, (4045), 67 states have internal predecessors, (4045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:16,314 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:52:16,314 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] [2021-11-09 09:52:16,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:16,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-09 09:52:16,515 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-09 09:52:16,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:16,516 INFO L85 PathProgramCache]: Analyzing trace with hash 852381056, now seen corresponding path program 8 times [2021-11-09 09:52:16,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:16,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944321091] [2021-11-09 09:52:16,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:16,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:16,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:17,964 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:17,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:17,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944321091] [2021-11-09 09:52:17,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944321091] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:17,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136637337] [2021-11-09 09:52:17,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:52:17,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:17,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:17,965 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:17,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 09:52:19,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:52:19,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:52:19,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-09 09:52:19,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:19,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:52:19,816 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 09:52:19,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 09:52:22,632 INFO L354 Elim1Store]: treesize reduction 92, result has 20.7 percent of original size [2021-11-09 09:52:22,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 50 [2021-11-09 09:52:22,803 INFO L354 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2021-11-09 09:52:22,803 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 44 treesize of output 22 [2021-11-09 09:52:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:23,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136637337] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:23,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:52:23,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 34] total 62 [2021-11-09 09:52:23,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759777204] [2021-11-09 09:52:23,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-09 09:52:23,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:23,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-09 09:52:23,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=3505, Unknown=0, NotChecked=0, Total=3782 [2021-11-09 09:52:23,101 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 142 [2021-11-09 09:52:23,106 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 445 transitions, 4787 flow. Second operand has 62 states, 62 states have (on average 63.54838709677419) internal successors, (3940), 62 states have internal predecessors, (3940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:23,106 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:52:23,107 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 142 [2021-11-09 09:52:23,107 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:52:36,741 INFO L129 PetriNetUnfolder]: 9846/18348 cut-off events. [2021-11-09 09:52:36,741 INFO L130 PetriNetUnfolder]: For 690035/691115 co-relation queries the response was YES. [2021-11-09 09:52:37,064 INFO L84 FinitePrefix]: Finished finitePrefix Result has 141230 conditions, 18348 events. 9846/18348 cut-off events. For 690035/691115 co-relation queries the response was YES. Maximal size of possible extension queue 822. Compared 161148 event pairs, 2279 based on Foata normal form. 90/18080 useless extension candidates. Maximal degree in co-relation 133512. Up to 3534 conditions per place. [2021-11-09 09:52:37,180 INFO L132 encePairwiseOnDemand]: 108/142 looper letters, 508 selfloop transitions, 248 changer transitions 21/826 dead transitions. [2021-11-09 09:52:37,180 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 826 transitions, 12407 flow [2021-11-09 09:52:37,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-09 09:52:37,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-11-09 09:52:37,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 4130 transitions. [2021-11-09 09:52:37,188 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4847417840375587 [2021-11-09 09:52:37,188 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 4130 transitions. [2021-11-09 09:52:37,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 4130 transitions. [2021-11-09 09:52:37,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:52:37,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 4130 transitions. [2021-11-09 09:52:37,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 68.83333333333333) internal successors, (4130), 60 states have internal predecessors, (4130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:37,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 142.0) internal successors, (8662), 61 states have internal predecessors, (8662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:37,209 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 142.0) internal successors, (8662), 61 states have internal predecessors, (8662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:37,209 INFO L186 Difference]: Start difference. First operand has 394 places, 445 transitions, 4787 flow. Second operand 60 states and 4130 transitions. [2021-11-09 09:52:37,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 826 transitions, 12407 flow [2021-11-09 09:52:40,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 826 transitions, 12047 flow, removed 116 selfloop flow, removed 35 redundant places. [2021-11-09 09:52:40,717 INFO L242 Difference]: Finished difference. Result has 430 places, 482 transitions, 5724 flow [2021-11-09 09:52:40,718 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=4496, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=5724, PETRI_PLACES=430, PETRI_TRANSITIONS=482} [2021-11-09 09:52:40,719 INFO L334 CegarLoopForPetriNet]: 128 programPoint places, 302 predicate places. [2021-11-09 09:52:40,719 INFO L470 AbstractCegarLoop]: Abstraction has has 430 places, 482 transitions, 5724 flow [2021-11-09 09:52:40,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 63.54838709677419) internal successors, (3940), 62 states have internal predecessors, (3940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:40,721 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:52:40,721 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] [2021-11-09 09:52:40,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:40,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:40,938 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-09 09:52:40,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:40,938 INFO L85 PathProgramCache]: Analyzing trace with hash -61492284, now seen corresponding path program 9 times [2021-11-09 09:52:40,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:40,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705114541] [2021-11-09 09:52:40,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:40,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:42,180 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:42,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:42,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705114541] [2021-11-09 09:52:42,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705114541] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:42,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407244471] [2021-11-09 09:52:42,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:52:42,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:42,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:42,182 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:42,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 09:52:43,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 09:52:43,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:52:43,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-09 09:52:43,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:43,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:52:43,814 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 09:52:43,815 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 [2021-11-09 09:52:44,409 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-09 09:52:44,409 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 [2021-11-09 09:52:44,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 09:52:45,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 09:52:45,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-09 09:52:45,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-09 09:52:46,780 INFO L354 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2021-11-09 09:52:46,781 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 56 treesize of output 25 [2021-11-09 09:52:47,014 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:47,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407244471] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:47,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:52:47,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 35] total 61 [2021-11-09 09:52:47,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799700976] [2021-11-09 09:52:47,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-09 09:52:47,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:47,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-09 09:52:47,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=3414, Unknown=0, NotChecked=0, Total=3660 [2021-11-09 09:52:47,027 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 142 [2021-11-09 09:52:47,029 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 482 transitions, 5724 flow. Second operand has 61 states, 61 states have (on average 62.540983606557376) internal successors, (3815), 61 states have internal predecessors, (3815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:47,029 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:52:47,029 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 142 [2021-11-09 09:52:47,029 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:53:06,532 INFO L129 PetriNetUnfolder]: 11553/22401 cut-off events. [2021-11-09 09:53:06,532 INFO L130 PetriNetUnfolder]: For 912893/914298 co-relation queries the response was YES. [2021-11-09 09:53:06,986 INFO L84 FinitePrefix]: Finished finitePrefix Result has 181326 conditions, 22401 events. 11553/22401 cut-off events. For 912893/914298 co-relation queries the response was YES. Maximal size of possible extension queue 1029. Compared 209169 event pairs, 1880 based on Foata normal form. 208/22269 useless extension candidates. Maximal degree in co-relation 179419. Up to 4912 conditions per place. [2021-11-09 09:53:07,283 INFO L132 encePairwiseOnDemand]: 105/142 looper letters, 634 selfloop transitions, 326 changer transitions 18/1028 dead transitions. [2021-11-09 09:53:07,284 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 1028 transitions, 17425 flow [2021-11-09 09:53:07,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-11-09 09:53:07,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-11-09 09:53:07,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 5478 transitions. [2021-11-09 09:53:07,293 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.476264997391758 [2021-11-09 09:53:07,293 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 5478 transitions. [2021-11-09 09:53:07,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 5478 transitions. [2021-11-09 09:53:07,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:53:07,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 5478 transitions. [2021-11-09 09:53:07,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 67.62962962962963) internal successors, (5478), 81 states have internal predecessors, (5478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:07,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 142.0) internal successors, (11644), 82 states have internal predecessors, (11644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:07,318 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 142.0) internal successors, (11644), 82 states have internal predecessors, (11644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:07,319 INFO L186 Difference]: Start difference. First operand has 430 places, 482 transitions, 5724 flow. Second operand 81 states and 5478 transitions. [2021-11-09 09:53:07,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 1028 transitions, 17425 flow [2021-11-09 09:53:11,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 1028 transitions, 16811 flow, removed 187 selfloop flow, removed 44 redundant places. [2021-11-09 09:53:11,790 INFO L242 Difference]: Finished difference. Result has 490 places, 567 transitions, 8278 flow [2021-11-09 09:53:11,791 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=5140, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=8278, PETRI_PLACES=490, PETRI_TRANSITIONS=567} [2021-11-09 09:53:11,791 INFO L334 CegarLoopForPetriNet]: 128 programPoint places, 362 predicate places. [2021-11-09 09:53:11,791 INFO L470 AbstractCegarLoop]: Abstraction has has 490 places, 567 transitions, 8278 flow [2021-11-09 09:53:11,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 62.540983606557376) internal successors, (3815), 61 states have internal predecessors, (3815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:11,792 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:53:11,792 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] [2021-11-09 09:53:11,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 09:53:11,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:11,993 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-09 09:53:11,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:53:11,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1892145038, now seen corresponding path program 10 times [2021-11-09 09:53:11,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:53:11,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298072530] [2021-11-09 09:53:11,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:53:11,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:53:12,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:13,731 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:53:13,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:53:13,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298072530] [2021-11-09 09:53:13,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298072530] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:13,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630740719] [2021-11-09 09:53:13,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:53:13,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:13,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:53:13,733 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:53:13,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 09:53:15,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:53:15,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:53:15,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-09 09:53:15,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:53:15,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:53:15,454 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 09:53:15,454 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 [2021-11-09 09:53:15,509 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-09 09:53:15,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 22 [2021-11-09 09:53:16,149 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-11-09 09:53:16,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 25 [2021-11-09 09:53:16,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 09:53:17,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-09 09:53:17,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-09 09:53:18,708 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-09 09:53:18,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-11-09 09:53:19,650 INFO L354 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2021-11-09 09:53:19,650 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 56 treesize of output 25 [2021-11-09 09:53:19,958 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:53:19,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630740719] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:19,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:53:19,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 38] total 66 [2021-11-09 09:53:19,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407307350] [2021-11-09 09:53:19,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-09 09:53:19,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:53:19,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-09 09:53:19,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=4042, Unknown=0, NotChecked=0, Total=4290 [2021-11-09 09:53:19,966 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 142 [2021-11-09 09:53:19,970 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 567 transitions, 8278 flow. Second operand has 66 states, 66 states have (on average 60.40909090909091) internal successors, (3987), 66 states have internal predecessors, (3987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:19,970 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:53:19,971 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 142 [2021-11-09 09:53:19,971 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:53:54,498 INFO L129 PetriNetUnfolder]: 13122/24641 cut-off events. [2021-11-09 09:53:54,499 INFO L130 PetriNetUnfolder]: For 1428711/1429939 co-relation queries the response was YES. [2021-11-09 09:53:55,077 INFO L84 FinitePrefix]: Finished finitePrefix Result has 209709 conditions, 24641 events. 13122/24641 cut-off events. For 1428711/1429939 co-relation queries the response was YES. Maximal size of possible extension queue 1229. Compared 232349 event pairs, 986 based on Foata normal form. 669/25018 useless extension candidates. Maximal degree in co-relation 207759. Up to 4150 conditions per place. [2021-11-09 09:53:55,363 INFO L132 encePairwiseOnDemand]: 105/142 looper letters, 697 selfloop transitions, 349 changer transitions 155/1249 dead transitions. [2021-11-09 09:53:55,364 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 589 places, 1249 transitions, 23048 flow [2021-11-09 09:53:55,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-11-09 09:53:55,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2021-11-09 09:53:55,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 7453 transitions. [2021-11-09 09:53:55,390 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.46862424547283704 [2021-11-09 09:53:55,390 INFO L72 ComplementDD]: Start complementDD. Operand 112 states and 7453 transitions. [2021-11-09 09:53:55,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 112 states and 7453 transitions. [2021-11-09 09:53:55,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:53:55,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 112 states and 7453 transitions. [2021-11-09 09:53:55,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 113 states, 112 states have (on average 66.54464285714286) internal successors, (7453), 112 states have internal predecessors, (7453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:55,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 113 states, 113 states have (on average 142.0) internal successors, (16046), 113 states have internal predecessors, (16046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:55,432 INFO L81 ComplementDD]: Finished complementDD. Result has 113 states, 113 states have (on average 142.0) internal successors, (16046), 113 states have internal predecessors, (16046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:53:55,432 INFO L186 Difference]: Start difference. First operand has 490 places, 567 transitions, 8278 flow. Second operand 112 states and 7453 transitions. [2021-11-09 09:53:55,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 589 places, 1249 transitions, 23048 flow [2021-11-09 09:54:03,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 1249 transitions, 21436 flow, removed 643 selfloop flow, removed 64 redundant places. [2021-11-09 09:54:03,308 INFO L242 Difference]: Finished difference. Result has 561 places, 512 transitions, 7892 flow [2021-11-09 09:54:03,309 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=5942, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=112, PETRI_FLOW=7892, PETRI_PLACES=561, PETRI_TRANSITIONS=512} [2021-11-09 09:54:03,309 INFO L334 CegarLoopForPetriNet]: 128 programPoint places, 433 predicate places. [2021-11-09 09:54:03,309 INFO L470 AbstractCegarLoop]: Abstraction has has 561 places, 512 transitions, 7892 flow [2021-11-09 09:54:03,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 60.40909090909091) internal successors, (3987), 66 states have internal predecessors, (3987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:54:03,310 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:54:03,311 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] [2021-11-09 09:54:03,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 09:54:03,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:54:03,538 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-09 09:54:03,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:54:03,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1937726022, now seen corresponding path program 11 times [2021-11-09 09:54:03,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:54:03,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896229956] [2021-11-09 09:54:03,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:54:03,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:54:03,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:54:04,897 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:54:04,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:54:04,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896229956] [2021-11-09 09:54:04,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896229956] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:54:04,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114401225] [2021-11-09 09:54:04,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:54:04,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:54:04,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:54:04,898 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:54:04,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 09:54:06,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-09 09:54:06,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:54:06,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-09 09:54:06,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:54:08,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 09:54:08,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 09:54:09,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 09:54:09,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 09:54:10,406 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-09 09:54:10,406 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 53 treesize of output 19 [2021-11-09 09:54:10,662 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:54:10,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114401225] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:54:10,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:54:10,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 38] total 64 [2021-11-09 09:54:10,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547033664] [2021-11-09 09:54:10,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-09 09:54:10,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:54:10,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-09 09:54:10,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=3763, Unknown=0, NotChecked=0, Total=4032 [2021-11-09 09:54:10,668 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 142 [2021-11-09 09:54:10,672 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 512 transitions, 7892 flow. Second operand has 64 states, 64 states have (on average 61.46875) internal successors, (3934), 64 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:54:10,672 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:54:10,672 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 142 [2021-11-09 09:54:10,672 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 09:54:45,488 INFO L129 PetriNetUnfolder]: 19165/35419 cut-off events. [2021-11-09 09:54:45,489 INFO L130 PetriNetUnfolder]: For 2222037/2223362 co-relation queries the response was YES. [2021-11-09 09:54:46,534 INFO L84 FinitePrefix]: Finished finitePrefix Result has 327988 conditions, 35419 events. 19165/35419 cut-off events. For 2222037/2223362 co-relation queries the response was YES. Maximal size of possible extension queue 1388. Compared 334886 event pairs, 3520 based on Foata normal form. 316/35260 useless extension candidates. Maximal degree in co-relation 327812. Up to 9062 conditions per place. [2021-11-09 09:54:46,792 INFO L132 encePairwiseOnDemand]: 105/142 looper letters, 967 selfloop transitions, 368 changer transitions 68/1452 dead transitions. [2021-11-09 09:54:46,792 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 648 places, 1452 transitions, 30712 flow [2021-11-09 09:54:46,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-11-09 09:54:46,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2021-11-09 09:54:46,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 7435 transitions. [2021-11-09 09:54:46,805 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.48035921953740796 [2021-11-09 09:54:46,806 INFO L72 ComplementDD]: Start complementDD. Operand 109 states and 7435 transitions. [2021-11-09 09:54:46,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 109 states and 7435 transitions. [2021-11-09 09:54:46,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 09:54:46,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 109 states and 7435 transitions. [2021-11-09 09:54:46,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 110 states, 109 states have (on average 68.21100917431193) internal successors, (7435), 109 states have internal predecessors, (7435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:54:46,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 110 states, 110 states have (on average 142.0) internal successors, (15620), 110 states have internal predecessors, (15620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:54:46,846 INFO L81 ComplementDD]: Finished complementDD. Result has 110 states, 110 states have (on average 142.0) internal successors, (15620), 110 states have internal predecessors, (15620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:54:46,847 INFO L186 Difference]: Start difference. First operand has 561 places, 512 transitions, 7892 flow. Second operand 109 states and 7435 transitions. [2021-11-09 09:54:46,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 648 places, 1452 transitions, 30712 flow [2021-11-09 09:55:05,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 563 places, 1452 transitions, 27563 flow, removed 1269 selfloop flow, removed 85 redundant places. [2021-11-09 09:55:05,112 INFO L242 Difference]: Finished difference. Result has 604 places, 681 transitions, 11843 flow [2021-11-09 09:55:05,113 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=6707, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=109, PETRI_FLOW=11843, PETRI_PLACES=604, PETRI_TRANSITIONS=681} [2021-11-09 09:55:05,113 INFO L334 CegarLoopForPetriNet]: 128 programPoint places, 476 predicate places. [2021-11-09 09:55:05,114 INFO L470 AbstractCegarLoop]: Abstraction has has 604 places, 681 transitions, 11843 flow [2021-11-09 09:55:05,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 61.46875) internal successors, (3934), 64 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:55:05,115 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 09:55:05,115 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] [2021-11-09 09:55:05,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 09:55:05,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-09 09:55:05,320 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-09 09:55:05,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:55:05,320 INFO L85 PathProgramCache]: Analyzing trace with hash -755887190, now seen corresponding path program 12 times [2021-11-09 09:55:05,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:55:05,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746494479] [2021-11-09 09:55:05,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:55:05,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:55:05,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:55:07,178 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:55:07,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:55:07,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746494479] [2021-11-09 09:55:07,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746494479] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:55:07,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6364478] [2021-11-09 09:55:07,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:55:07,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:55:07,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:55:07,181 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:55:07,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97433f70-bbff-4114-826b-446080608596/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 09:55:09,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-09 09:55:09,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:55:09,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-09 09:55:09,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:55:09,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:55:10,494 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 09:55:10,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 09:55:11,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 09:55:11,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 09:55:12,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 09:55:12,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-09 09:55:14,146 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-11-09 09:55:14,147 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 67 treesize of output 38 [2021-11-09 09:55:14,355 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:55:14,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6364478] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:55:14,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:55:14,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 35] total 62 [2021-11-09 09:55:14,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259589402] [2021-11-09 09:55:14,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-09 09:55:14,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:55:14,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-09 09:55:14,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=3543, Unknown=0, NotChecked=0, Total=3782 [2021-11-09 09:55:14,360 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 142 [2021-11-09 09:55:14,362 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 681 transitions, 11843 flow. Second operand has 62 states, 62 states have (on average 62.5) internal successors, (3875), 62 states have internal predecessors, (3875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:55:14,362 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 09:55:14,362 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 142 [2021-11-09 09:55:14,362 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand