./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem14_label09.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label09.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3 --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 4ea6fc2da400c6409d02bc395e547eb6158b1e4a ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 20:14:36,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:14:36,687 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:14:36,762 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:14:36,764 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:14:36,770 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:14:36,773 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:14:36,778 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:14:36,782 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:14:36,791 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:14:36,793 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:14:36,796 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:14:36,796 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:14:36,800 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:14:36,803 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:14:36,813 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:14:36,817 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:14:36,819 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:14:36,822 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:14:36,831 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:14:36,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:14:36,839 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:14:36,843 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:14:36,845 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:14:36,850 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:14:36,851 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:14:36,851 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:14:36,854 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:14:36,855 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:14:36,857 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:14:36,857 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:14:36,859 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:14:36,861 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:14:36,863 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:14:36,865 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:14:36,866 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:14:36,867 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:14:36,867 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:14:36,868 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:14:36,869 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:14:36,871 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:14:36,873 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 20:14:36,930 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:14:36,930 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:14:36,931 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:14:36,939 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:14:36,941 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:14:36,942 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:14:36,942 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:14:36,943 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:14:36,943 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:14:36,943 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:14:36,945 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:14:36,945 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:14:36,945 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 20:14:36,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:14:36,946 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 20:14:36,946 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:14:36,947 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 20:14:36,947 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:14:36,947 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 20:14:36,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:14:36,948 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:14:36,948 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:14:36,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:14:36,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:14:36,949 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:14:36,950 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 20:14:36,950 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:14:36,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 20:14:36,951 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 20:14:36,953 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 20:14:36,953 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 20:14:36,953 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:14:36,954 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_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ea6fc2da400c6409d02bc395e547eb6158b1e4a [2021-10-15 20:14:37,328 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:14:37,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:14:37,357 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:14:37,359 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:14:37,360 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:14:37,361 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/eca-rers2012/Problem14_label09.c [2021-10-15 20:14:37,427 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/data/5b561e779/61fd884678fc4feaa7890d8b498308d0/FLAGe7208485f [2021-10-15 20:14:38,123 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:14:38,124 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/sv-benchmarks/c/eca-rers2012/Problem14_label09.c [2021-10-15 20:14:38,138 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/data/5b561e779/61fd884678fc4feaa7890d8b498308d0/FLAGe7208485f [2021-10-15 20:14:38,326 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/data/5b561e779/61fd884678fc4feaa7890d8b498308d0 [2021-10-15 20:14:38,329 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:14:38,331 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 20:14:38,334 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:14:38,335 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:14:38,339 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:14:38,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:14:38" (1/1) ... [2021-10-15 20:14:38,342 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4204c81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:38, skipping insertion in model container [2021-10-15 20:14:38,343 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:14:38" (1/1) ... [2021-10-15 20:14:38,351 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:14:38,449 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:14:38,772 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_c1a128d8-30e1-4275-a47d-cdf29bd59279/sv-benchmarks/c/eca-rers2012/Problem14_label09.c[4722,4735] [2021-10-15 20:14:39,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:14:39,039 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:14:39,067 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_c1a128d8-30e1-4275-a47d-cdf29bd59279/sv-benchmarks/c/eca-rers2012/Problem14_label09.c[4722,4735] [2021-10-15 20:14:39,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:14:39,203 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:14:39,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:39 WrapperNode [2021-10-15 20:14:39,204 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:14:39,205 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 20:14:39,205 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 20:14:39,206 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 20:14:39,215 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:39" (1/1) ... [2021-10-15 20:14:39,242 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:39" (1/1) ... [2021-10-15 20:14:39,328 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 20:14:39,329 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:14:39,329 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:14:39,329 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:14:39,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:39" (1/1) ... [2021-10-15 20:14:39,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:39" (1/1) ... [2021-10-15 20:14:39,348 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:39" (1/1) ... [2021-10-15 20:14:39,348 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:39" (1/1) ... [2021-10-15 20:14:39,389 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:39" (1/1) ... [2021-10-15 20:14:39,400 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:39" (1/1) ... [2021-10-15 20:14:39,407 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:39" (1/1) ... [2021-10-15 20:14:39,420 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:14:39,421 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:14:39,421 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:14:39,421 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:14:39,439 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:39" (1/1) ... [2021-10-15 20:14:39,448 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:14:39,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:14:39,488 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:14:39,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:14:39,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 20:14:39,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:14:39,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:14:39,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:14:41,197 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:14:41,197 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 20:14:41,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:14:41 BoogieIcfgContainer [2021-10-15 20:14:41,202 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:14:41,204 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:14:41,204 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:14:41,211 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:14:41,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:14:38" (1/3) ... [2021-10-15 20:14:41,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a49e22b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:14:41, skipping insertion in model container [2021-10-15 20:14:41,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:14:39" (2/3) ... [2021-10-15 20:14:41,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a49e22b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:14:41, skipping insertion in model container [2021-10-15 20:14:41,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:14:41" (3/3) ... [2021-10-15 20:14:41,217 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem14_label09.c [2021-10-15 20:14:41,231 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:14:41,231 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 20:14:41,303 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:14:41,314 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, mConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-15 20:14:41,314 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 20:14:41,347 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 245 places, 422 transitions, 844 flow [2021-10-15 20:14:41,461 INFO L129 PetriNetUnfolder]: 178/422 cut-off events. [2021-10-15 20:14:41,461 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:14:41,464 INFO L84 FinitePrefix]: Finished finitePrefix Result has 423 conditions, 422 events. 178/422 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 249 event pairs, 0 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 0. Up to 115 conditions per place. [2021-10-15 20:14:41,464 INFO L82 GeneralOperation]: Start removeDead. Operand has 245 places, 422 transitions, 844 flow [2021-10-15 20:14:41,478 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 242 places, 417 transitions, 834 flow [2021-10-15 20:14:41,493 INFO L129 PetriNetUnfolder]: 40/125 cut-off events. [2021-10-15 20:14:41,494 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:14:41,494 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:14:41,495 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] [2021-10-15 20:14:41,495 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:14:41,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:14:41,502 INFO L82 PathProgramCache]: Analyzing trace with hash -2068820151, now seen corresponding path program 1 times [2021-10-15 20:14:41,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:14:41,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688777910] [2021-10-15 20:14:41,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:14:41,515 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:14:41,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:14:41,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:14:41,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:14:41,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688777910] [2021-10-15 20:14:41,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688777910] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:14:41,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:14:41,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:14:41,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626896639] [2021-10-15 20:14:41,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:14:41,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:14:41,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:14:41,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:14:41,889 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:14:41,893 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 417 transitions, 834 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:41,894 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:14:41,894 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:14:41,896 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:14:44,313 INFO L129 PetriNetUnfolder]: 289/886 cut-off events. [2021-10-15 20:14:44,313 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:14:44,315 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1763 conditions, 886 events. 289/886 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1258 event pairs, 0 based on Foata normal form. 61/598 useless extension candidates. Maximal degree in co-relation 1. Up to 354 conditions per place. [2021-10-15 20:14:44,325 INFO L132 encePairwiseOnDemand]: 185/422 looper letters, 641 selfloop transitions, 126 changer transitions 108/880 dead transitions. [2021-10-15 20:14:44,325 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 880 transitions, 3510 flow [2021-10-15 20:14:44,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:14:44,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:14:44,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1144 transitions. [2021-10-15 20:14:44,352 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6777251184834123 [2021-10-15 20:14:44,353 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1144 transitions. [2021-10-15 20:14:44,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1144 transitions. [2021-10-15 20:14:44,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:14:44,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1144 transitions. [2021-10-15 20:14:44,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:44,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:44,393 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:44,395 INFO L186 Difference]: Start difference. First operand has 242 places, 417 transitions, 834 flow. Second operand 4 states and 1144 transitions. [2021-10-15 20:14:44,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 880 transitions, 3510 flow [2021-10-15 20:14:44,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 880 transitions, 3510 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:14:44,441 INFO L242 Difference]: Finished difference. Result has 248 places, 421 transitions, 1782 flow [2021-10-15 20:14:44,444 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=712, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1782, PETRI_PLACES=248, PETRI_TRANSITIONS=421} [2021-10-15 20:14:44,445 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 6 predicate places. [2021-10-15 20:14:44,446 INFO L470 AbstractCegarLoop]: Abstraction has has 248 places, 421 transitions, 1782 flow [2021-10-15 20:14:44,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:44,447 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:14:44,448 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-10-15 20:14:44,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 20:14:44,449 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:14:44,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:14:44,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1796285180, now seen corresponding path program 1 times [2021-10-15 20:14:44,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:14:44,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36443416] [2021-10-15 20:14:44,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:14:44,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:14:44,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:14:44,843 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:14:44,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:14:44,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36443416] [2021-10-15 20:14:44,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36443416] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:14:44,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:14:44,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:14:44,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929572622] [2021-10-15 20:14:44,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:14:44,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:14:44,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:14:44,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:14:44,851 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:14:44,852 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 421 transitions, 1782 flow. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:44,852 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:14:44,852 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:14:44,852 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:14:46,517 INFO L129 PetriNetUnfolder]: 300/1222 cut-off events. [2021-10-15 20:14:46,517 INFO L130 PetriNetUnfolder]: For 445/445 co-relation queries the response was YES. [2021-10-15 20:14:46,520 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3008 conditions, 1222 events. 300/1222 cut-off events. For 445/445 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1652 event pairs, 0 based on Foata normal form. 170/1392 useless extension candidates. Maximal degree in co-relation 1601. Up to 535 conditions per place. [2021-10-15 20:14:46,528 INFO L132 encePairwiseOnDemand]: 307/422 looper letters, 501 selfloop transitions, 12 changer transitions 163/681 dead transitions. [2021-10-15 20:14:46,529 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 681 transitions, 3870 flow [2021-10-15 20:14:46,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:14:46,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:14:46,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 639 transitions. [2021-10-15 20:14:46,534 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.37855450236966826 [2021-10-15 20:14:46,534 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 639 transitions. [2021-10-15 20:14:46,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 639 transitions. [2021-10-15 20:14:46,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:14:46,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 639 transitions. [2021-10-15 20:14:46,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 159.75) internal successors, (639), 4 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:46,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:46,552 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:46,552 INFO L186 Difference]: Start difference. First operand has 248 places, 421 transitions, 1782 flow. Second operand 4 states and 639 transitions. [2021-10-15 20:14:46,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 681 transitions, 3870 flow [2021-10-15 20:14:46,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 681 transitions, 3870 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:14:46,620 INFO L242 Difference]: Finished difference. Result has 193 places, 339 transitions, 1612 flow [2021-10-15 20:14:46,621 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1782, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1612, PETRI_PLACES=193, PETRI_TRANSITIONS=339} [2021-10-15 20:14:46,629 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -49 predicate places. [2021-10-15 20:14:46,629 INFO L470 AbstractCegarLoop]: Abstraction has has 193 places, 339 transitions, 1612 flow [2021-10-15 20:14:46,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:46,630 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:14:46,631 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2021-10-15 20:14:46,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 20:14:46,632 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:14:46,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:14:46,636 INFO L82 PathProgramCache]: Analyzing trace with hash -2036921752, now seen corresponding path program 1 times [2021-10-15 20:14:46,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:14:46,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522580381] [2021-10-15 20:14:46,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:14:46,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:14:46,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:14:46,994 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 85 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:14:46,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:14:46,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522580381] [2021-10-15 20:14:46,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522580381] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:14:46,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883506392] [2021-10-15 20:14:46,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:14:46,998 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:14:46,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:14:47,004 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:14:47,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 20:14:47,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:14:47,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 20:14:47,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:14:48,090 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-15 20:14:48,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883506392] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:14:48,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:14:48,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-10-15 20:14:48,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146547587] [2021-10-15 20:14:48,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:14:48,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:14:48,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:14:48,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:14:48,097 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:14:48,098 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 339 transitions, 1612 flow. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:48,098 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:14:48,098 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:14:48,098 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:14:49,362 INFO L129 PetriNetUnfolder]: 234/1483 cut-off events. [2021-10-15 20:14:49,362 INFO L130 PetriNetUnfolder]: For 890/890 co-relation queries the response was YES. [2021-10-15 20:14:49,364 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3632 conditions, 1483 events. 234/1483 cut-off events. For 890/890 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 2646 event pairs, 0 based on Foata normal form. 80/1563 useless extension candidates. Maximal degree in co-relation 2487. Up to 1076 conditions per place. [2021-10-15 20:14:49,373 INFO L132 encePairwiseOnDemand]: 345/422 looper letters, 452 selfloop transitions, 130 changer transitions 0/587 dead transitions. [2021-10-15 20:14:49,374 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 587 transitions, 3684 flow [2021-10-15 20:14:49,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:14:49,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:14:49,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2021-10-15 20:14:49,378 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.41627172195892576 [2021-10-15 20:14:49,378 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2021-10-15 20:14:49,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2021-10-15 20:14:49,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:14:49,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2021-10-15 20:14:49,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:49,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:49,387 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:49,388 INFO L186 Difference]: Start difference. First operand has 193 places, 339 transitions, 1612 flow. Second operand 3 states and 527 transitions. [2021-10-15 20:14:49,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 587 transitions, 3684 flow [2021-10-15 20:14:49,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 587 transitions, 3668 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-10-15 20:14:49,421 INFO L242 Difference]: Finished difference. Result has 194 places, 412 transitions, 2868 flow [2021-10-15 20:14:49,422 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1582, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2868, PETRI_PLACES=194, PETRI_TRANSITIONS=412} [2021-10-15 20:14:49,422 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -48 predicate places. [2021-10-15 20:14:49,423 INFO L470 AbstractCegarLoop]: Abstraction has has 194 places, 412 transitions, 2868 flow [2021-10-15 20:14:49,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:49,423 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:14:49,424 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-10-15 20:14:49,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 20:14:49,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:14:49,641 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:14:49,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:14:49,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1670561777, now seen corresponding path program 1 times [2021-10-15 20:14:49,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:14:49,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884806104] [2021-10-15 20:14:49,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:14:49,643 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:14:49,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:14:49,847 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:14:49,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:14:49,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884806104] [2021-10-15 20:14:49,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884806104] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:14:49,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:14:49,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:14:49,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049694563] [2021-10-15 20:14:49,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:14:49,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:14:49,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:14:49,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:14:49,856 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:14:49,856 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 412 transitions, 2868 flow. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:49,856 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:14:49,856 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:14:49,856 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:14:51,639 INFO L129 PetriNetUnfolder]: 274/2057 cut-off events. [2021-10-15 20:14:51,639 INFO L130 PetriNetUnfolder]: For 2698/2698 co-relation queries the response was YES. [2021-10-15 20:14:51,642 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5296 conditions, 2057 events. 274/2057 cut-off events. For 2698/2698 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 4076 event pairs, 0 based on Foata normal form. 74/2131 useless extension candidates. Maximal degree in co-relation 3858. Up to 1483 conditions per place. [2021-10-15 20:14:51,655 INFO L132 encePairwiseOnDemand]: 346/422 looper letters, 564 selfloop transitions, 57 changer transitions 0/626 dead transitions. [2021-10-15 20:14:51,655 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 626 transitions, 4888 flow [2021-10-15 20:14:51,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:14:51,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:14:51,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 526 transitions. [2021-10-15 20:14:51,659 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4154818325434439 [2021-10-15 20:14:51,659 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 526 transitions. [2021-10-15 20:14:51,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 526 transitions. [2021-10-15 20:14:51,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:14:51,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 526 transitions. [2021-10-15 20:14:51,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:51,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:51,669 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:51,669 INFO L186 Difference]: Start difference. First operand has 194 places, 412 transitions, 2868 flow. Second operand 3 states and 526 transitions. [2021-10-15 20:14:51,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 626 transitions, 4888 flow [2021-10-15 20:14:51,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 626 transitions, 4086 flow, removed 247 selfloop flow, removed 2 redundant places. [2021-10-15 20:14:51,713 INFO L242 Difference]: Finished difference. Result has 195 places, 451 transitions, 2875 flow [2021-10-15 20:14:51,714 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2194, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2875, PETRI_PLACES=195, PETRI_TRANSITIONS=451} [2021-10-15 20:14:51,715 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -47 predicate places. [2021-10-15 20:14:51,715 INFO L470 AbstractCegarLoop]: Abstraction has has 195 places, 451 transitions, 2875 flow [2021-10-15 20:14:51,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:51,717 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:14:51,722 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2021-10-15 20:14:51,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 20:14:51,723 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:14:51,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:14:51,723 INFO L82 PathProgramCache]: Analyzing trace with hash -841281577, now seen corresponding path program 1 times [2021-10-15 20:14:51,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:14:51,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102744669] [2021-10-15 20:14:51,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:14:51,724 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:14:51,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:14:52,034 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2021-10-15 20:14:52,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:14:52,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102744669] [2021-10-15 20:14:52,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102744669] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:14:52,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:14:52,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:14:52,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522445570] [2021-10-15 20:14:52,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:14:52,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:14:52,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:14:52,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:14:52,039 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:14:52,039 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 451 transitions, 2875 flow. Second operand has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:52,039 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:14:52,039 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:14:52,040 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:14:54,094 INFO L129 PetriNetUnfolder]: 311/2301 cut-off events. [2021-10-15 20:14:54,094 INFO L130 PetriNetUnfolder]: For 1611/1611 co-relation queries the response was YES. [2021-10-15 20:14:54,097 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5726 conditions, 2301 events. 311/2301 cut-off events. For 1611/1611 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 5460 event pairs, 0 based on Foata normal form. 1/2302 useless extension candidates. Maximal degree in co-relation 3294. Up to 1966 conditions per place. [2021-10-15 20:14:54,109 INFO L132 encePairwiseOnDemand]: 377/422 looper letters, 538 selfloop transitions, 29 changer transitions 117/689 dead transitions. [2021-10-15 20:14:54,109 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 689 transitions, 5007 flow [2021-10-15 20:14:54,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:14:54,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:14:54,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 523 transitions. [2021-10-15 20:14:54,114 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.30983412322274884 [2021-10-15 20:14:54,114 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 523 transitions. [2021-10-15 20:14:54,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 523 transitions. [2021-10-15 20:14:54,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:14:54,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 523 transitions. [2021-10-15 20:14:54,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 130.75) internal successors, (523), 4 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:54,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:54,125 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:54,125 INFO L186 Difference]: Start difference. First operand has 195 places, 451 transitions, 2875 flow. Second operand 4 states and 523 transitions. [2021-10-15 20:14:54,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 689 transitions, 5007 flow [2021-10-15 20:14:54,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 689 transitions, 4828 flow, removed 60 selfloop flow, removed 1 redundant places. [2021-10-15 20:14:54,160 INFO L242 Difference]: Finished difference. Result has 200 places, 397 transitions, 2394 flow [2021-10-15 20:14:54,161 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2726, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2394, PETRI_PLACES=200, PETRI_TRANSITIONS=397} [2021-10-15 20:14:54,162 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -42 predicate places. [2021-10-15 20:14:54,162 INFO L470 AbstractCegarLoop]: Abstraction has has 200 places, 397 transitions, 2394 flow [2021-10-15 20:14:54,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:54,163 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:14:54,164 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-15 20:14:54,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 20:14:54,164 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:14:54,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:14:54,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1590776259, now seen corresponding path program 1 times [2021-10-15 20:14:54,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:14:54,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715367479] [2021-10-15 20:14:54,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:14:54,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:14:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:14:54,419 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-10-15 20:14:54,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:14:54,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715367479] [2021-10-15 20:14:54,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715367479] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:14:54,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166414646] [2021-10-15 20:14:54,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:14:54,420 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:14:54,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:14:54,426 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:14:54,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 20:14:54,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:14:54,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 20:14:54,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:14:56,519 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-10-15 20:14:56,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166414646] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:14:56,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:14:56,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-10-15 20:14:56,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294560854] [2021-10-15 20:14:56,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:14:56,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:14:56,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:14:56,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:14:56,525 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:14:56,526 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 397 transitions, 2394 flow. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:56,526 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:14:56,527 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:14:56,527 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:14:58,479 INFO L129 PetriNetUnfolder]: 274/2947 cut-off events. [2021-10-15 20:14:58,479 INFO L130 PetriNetUnfolder]: For 1653/1653 co-relation queries the response was YES. [2021-10-15 20:14:58,486 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6923 conditions, 2947 events. 274/2947 cut-off events. For 1653/1653 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 9650 event pairs, 0 based on Foata normal form. 2/2949 useless extension candidates. Maximal degree in co-relation 6314. Up to 1718 conditions per place. [2021-10-15 20:14:58,501 INFO L132 encePairwiseOnDemand]: 374/422 looper letters, 475 selfloop transitions, 145 changer transitions 0/625 dead transitions. [2021-10-15 20:14:58,501 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 625 transitions, 4564 flow [2021-10-15 20:14:58,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:14:58,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:14:58,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 458 transitions. [2021-10-15 20:14:58,505 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3617693522906793 [2021-10-15 20:14:58,505 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 458 transitions. [2021-10-15 20:14:58,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 458 transitions. [2021-10-15 20:14:58,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:14:58,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 458 transitions. [2021-10-15 20:14:58,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:58,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:58,514 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:58,514 INFO L186 Difference]: Start difference. First operand has 200 places, 397 transitions, 2394 flow. Second operand 3 states and 458 transitions. [2021-10-15 20:14:58,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 625 transitions, 4564 flow [2021-10-15 20:14:58,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 625 transitions, 4430 flow, removed 36 selfloop flow, removed 3 redundant places. [2021-10-15 20:14:58,549 INFO L242 Difference]: Finished difference. Result has 200 places, 450 transitions, 3530 flow [2021-10-15 20:14:58,550 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2260, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3530, PETRI_PLACES=200, PETRI_TRANSITIONS=450} [2021-10-15 20:14:58,551 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -42 predicate places. [2021-10-15 20:14:58,551 INFO L470 AbstractCegarLoop]: Abstraction has has 200 places, 450 transitions, 3530 flow [2021-10-15 20:14:58,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:58,552 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:14:58,552 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-15 20:14:58,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 20:14:58,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:14:58,767 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:14:58,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:14:58,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1026613071, now seen corresponding path program 1 times [2021-10-15 20:14:58,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:14:58,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490709509] [2021-10-15 20:14:58,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:14:58,768 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:14:58,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:14:59,075 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 377 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-10-15 20:14:59,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:14:59,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490709509] [2021-10-15 20:14:59,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490709509] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:14:59,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:14:59,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:14:59,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117600276] [2021-10-15 20:14:59,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:14:59,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:14:59,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:14:59,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:14:59,081 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:14:59,082 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 450 transitions, 3530 flow. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:14:59,082 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:14:59,082 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:14:59,082 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:15:01,227 INFO L129 PetriNetUnfolder]: 274/3303 cut-off events. [2021-10-15 20:15:01,227 INFO L130 PetriNetUnfolder]: For 3706/3706 co-relation queries the response was YES. [2021-10-15 20:15:01,235 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7900 conditions, 3303 events. 274/3303 cut-off events. For 3706/3706 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 11828 event pairs, 0 based on Foata normal form. 81/3384 useless extension candidates. Maximal degree in co-relation 7154. Up to 2535 conditions per place. [2021-10-15 20:15:01,251 INFO L132 encePairwiseOnDemand]: 365/422 looper letters, 604 selfloop transitions, 18 changer transitions 0/627 dead transitions. [2021-10-15 20:15:01,252 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 627 transitions, 5142 flow [2021-10-15 20:15:01,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:15:01,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:15:01,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2021-10-15 20:15:01,256 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38704581358609796 [2021-10-15 20:15:01,256 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2021-10-15 20:15:01,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2021-10-15 20:15:01,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:15:01,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2021-10-15 20:15:01,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:01,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:01,263 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:01,263 INFO L186 Difference]: Start difference. First operand has 200 places, 450 transitions, 3530 flow. Second operand 3 states and 490 transitions. [2021-10-15 20:15:01,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 627 transitions, 5142 flow [2021-10-15 20:15:01,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 627 transitions, 4802 flow, removed 24 selfloop flow, removed 3 redundant places. [2021-10-15 20:15:01,311 INFO L242 Difference]: Finished difference. Result has 200 places, 452 transitions, 3418 flow [2021-10-15 20:15:01,312 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=3180, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3418, PETRI_PLACES=200, PETRI_TRANSITIONS=452} [2021-10-15 20:15:01,313 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -42 predicate places. [2021-10-15 20:15:01,313 INFO L470 AbstractCegarLoop]: Abstraction has has 200 places, 452 transitions, 3418 flow [2021-10-15 20:15:01,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:01,315 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:15:01,316 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:15:01,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 20:15:01,316 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:15:01,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:15:01,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1829033834, now seen corresponding path program 1 times [2021-10-15 20:15:01,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:15:01,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30257672] [2021-10-15 20:15:01,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:01,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:15:01,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:01,547 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 377 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-10-15 20:15:01,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:15:01,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30257672] [2021-10-15 20:15:01,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30257672] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:15:01,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:15:01,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:15:01,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204868096] [2021-10-15 20:15:01,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:15:01,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:15:01,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:15:01,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:15:01,557 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:15:01,558 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 452 transitions, 3418 flow. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:01,559 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:15:01,559 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:15:01,559 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:15:04,010 INFO L129 PetriNetUnfolder]: 330/4249 cut-off events. [2021-10-15 20:15:04,023 INFO L130 PetriNetUnfolder]: For 4237/4237 co-relation queries the response was YES. [2021-10-15 20:15:04,029 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10036 conditions, 4249 events. 330/4249 cut-off events. For 4237/4237 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 18522 event pairs, 0 based on Foata normal form. 78/4327 useless extension candidates. Maximal degree in co-relation 9192. Up to 2445 conditions per place. [2021-10-15 20:15:04,088 INFO L132 encePairwiseOnDemand]: 364/422 looper letters, 528 selfloop transitions, 151 changer transitions 0/684 dead transitions. [2021-10-15 20:15:04,088 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 684 transitions, 5897 flow [2021-10-15 20:15:04,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:15:04,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:15:04,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2021-10-15 20:15:04,104 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38783570300157977 [2021-10-15 20:15:04,104 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2021-10-15 20:15:04,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2021-10-15 20:15:04,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:15:04,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2021-10-15 20:15:04,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:04,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:04,112 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:04,112 INFO L186 Difference]: Start difference. First operand has 200 places, 452 transitions, 3418 flow. Second operand 3 states and 491 transitions. [2021-10-15 20:15:04,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 684 transitions, 5897 flow [2021-10-15 20:15:04,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 684 transitions, 5876 flow, removed 4 selfloop flow, removed 1 redundant places. [2021-10-15 20:15:04,194 INFO L242 Difference]: Finished difference. Result has 203 places, 509 transitions, 5010 flow [2021-10-15 20:15:04,195 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=3116, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=5010, PETRI_PLACES=203, PETRI_TRANSITIONS=509} [2021-10-15 20:15:04,196 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -39 predicate places. [2021-10-15 20:15:04,196 INFO L470 AbstractCegarLoop]: Abstraction has has 203 places, 509 transitions, 5010 flow [2021-10-15 20:15:04,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:04,197 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:15:04,197 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:15:04,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 20:15:04,198 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:15:04,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:15:04,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1313117521, now seen corresponding path program 1 times [2021-10-15 20:15:04,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:15:04,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743252907] [2021-10-15 20:15:04,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:04,200 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:15:04,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:04,439 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 491 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-10-15 20:15:04,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:15:04,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743252907] [2021-10-15 20:15:04,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743252907] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:15:04,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:15:04,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:15:04,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259954379] [2021-10-15 20:15:04,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:15:04,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:15:04,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:15:04,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:15:04,445 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:15:04,445 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 509 transitions, 5010 flow. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:04,446 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:15:04,446 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:15:04,446 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:15:07,866 INFO L129 PetriNetUnfolder]: 416/5759 cut-off events. [2021-10-15 20:15:07,866 INFO L130 PetriNetUnfolder]: For 9826/9826 co-relation queries the response was YES. [2021-10-15 20:15:07,871 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14062 conditions, 5759 events. 416/5759 cut-off events. For 9826/9826 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 30177 event pairs, 0 based on Foata normal form. 125/5884 useless extension candidates. Maximal degree in co-relation 12974. Up to 3128 conditions per place. [2021-10-15 20:15:07,884 INFO L132 encePairwiseOnDemand]: 366/422 looper letters, 648 selfloop transitions, 117 changer transitions 0/770 dead transitions. [2021-10-15 20:15:07,884 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 770 transitions, 8292 flow [2021-10-15 20:15:07,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:15:07,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:15:07,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2021-10-15 20:15:07,887 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38783570300157977 [2021-10-15 20:15:07,888 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2021-10-15 20:15:07,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2021-10-15 20:15:07,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:15:07,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2021-10-15 20:15:07,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:07,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:07,895 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:07,895 INFO L186 Difference]: Start difference. First operand has 203 places, 509 transitions, 5010 flow. Second operand 3 states and 491 transitions. [2021-10-15 20:15:07,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 770 transitions, 8292 flow [2021-10-15 20:15:07,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 770 transitions, 7740 flow, removed 89 selfloop flow, removed 2 redundant places. [2021-10-15 20:15:07,958 INFO L242 Difference]: Finished difference. Result has 205 places, 583 transitions, 6522 flow [2021-10-15 20:15:07,959 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=4464, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=6522, PETRI_PLACES=205, PETRI_TRANSITIONS=583} [2021-10-15 20:15:07,959 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -37 predicate places. [2021-10-15 20:15:07,959 INFO L470 AbstractCegarLoop]: Abstraction has has 205 places, 583 transitions, 6522 flow [2021-10-15 20:15:07,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:07,960 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:15:07,960 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:15:07,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-15 20:15:07,961 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:15:07,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:15:07,961 INFO L82 PathProgramCache]: Analyzing trace with hash -2019878851, now seen corresponding path program 1 times [2021-10-15 20:15:07,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:15:07,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037343806] [2021-10-15 20:15:07,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:07,962 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:15:08,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:08,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 1084 proven. 104 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2021-10-15 20:15:08,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:15:08,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037343806] [2021-10-15 20:15:08,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037343806] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:15:08,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392551271] [2021-10-15 20:15:08,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:08,372 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:15:08,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:15:08,378 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:15:08,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 20:15:08,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:08,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 20:15:08,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:15:10,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 257 proven. 0 refuted. 0 times theorem prover too weak. 1288 trivial. 0 not checked. [2021-10-15 20:15:10,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392551271] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:15:10,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:15:10,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-10-15 20:15:10,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771589333] [2021-10-15 20:15:10,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:15:10,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:15:10,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:15:10,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:15:10,557 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:15:10,558 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 583 transitions, 6522 flow. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:10,558 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:15:10,558 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:15:10,558 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:15:14,769 INFO L129 PetriNetUnfolder]: 480/6535 cut-off events. [2021-10-15 20:15:14,769 INFO L130 PetriNetUnfolder]: For 10001/10001 co-relation queries the response was YES. [2021-10-15 20:15:14,777 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16232 conditions, 6535 events. 480/6535 cut-off events. For 10001/10001 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 37828 event pairs, 0 based on Foata normal form. 1/6536 useless extension candidates. Maximal degree in co-relation 15229. Up to 4719 conditions per place. [2021-10-15 20:15:14,797 INFO L132 encePairwiseOnDemand]: 389/422 looper letters, 645 selfloop transitions, 170 changer transitions 0/820 dead transitions. [2021-10-15 20:15:14,797 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 820 transitions, 9552 flow [2021-10-15 20:15:14,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:15:14,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:15:14,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 458 transitions. [2021-10-15 20:15:14,801 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3617693522906793 [2021-10-15 20:15:14,801 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 458 transitions. [2021-10-15 20:15:14,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 458 transitions. [2021-10-15 20:15:14,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:15:14,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 458 transitions. [2021-10-15 20:15:14,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:14,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:14,952 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:14,952 INFO L186 Difference]: Start difference. First operand has 205 places, 583 transitions, 6522 flow. Second operand 3 states and 458 transitions. [2021-10-15 20:15:14,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 820 transitions, 9552 flow [2021-10-15 20:15:15,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 820 transitions, 9284 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:15:15,031 INFO L242 Difference]: Finished difference. Result has 207 places, 645 transitions, 8110 flow [2021-10-15 20:15:15,034 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=6288, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=8110, PETRI_PLACES=207, PETRI_TRANSITIONS=645} [2021-10-15 20:15:15,034 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -35 predicate places. [2021-10-15 20:15:15,034 INFO L470 AbstractCegarLoop]: Abstraction has has 207 places, 645 transitions, 8110 flow [2021-10-15 20:15:15,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:15,035 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:15:15,036 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:15:15,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 20:15:15,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-15 20:15:15,251 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:15:15,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:15:15,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1713531829, now seen corresponding path program 1 times [2021-10-15 20:15:15,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:15:15,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611416113] [2021-10-15 20:15:15,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:15,252 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:15:15,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:15,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 857 proven. 110 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-10-15 20:15:15,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:15:15,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611416113] [2021-10-15 20:15:15,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611416113] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:15:15,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138706890] [2021-10-15 20:15:15,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:15,616 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:15:15,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:15:15,617 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:15:15,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 20:15:16,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:16,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 20:15:16,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:15:18,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 857 proven. 110 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-10-15 20:15:18,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138706890] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:15:18,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:15:18,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-10-15 20:15:18,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541148447] [2021-10-15 20:15:18,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:15:18,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:15:18,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:15:18,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:15:18,263 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:15:18,264 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 645 transitions, 8110 flow. Second operand has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:18,264 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:15:18,264 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:15:18,264 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:15:24,502 INFO L129 PetriNetUnfolder]: 572/8051 cut-off events. [2021-10-15 20:15:24,502 INFO L130 PetriNetUnfolder]: For 16372/16372 co-relation queries the response was YES. [2021-10-15 20:15:24,518 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20252 conditions, 8051 events. 572/8051 cut-off events. For 16372/16372 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 50141 event pairs, 0 based on Foata normal form. 53/8104 useless extension candidates. Maximal degree in co-relation 18992. Up to 3715 conditions per place. [2021-10-15 20:15:24,546 INFO L132 encePairwiseOnDemand]: 367/422 looper letters, 863 selfloop transitions, 231 changer transitions 0/1099 dead transitions. [2021-10-15 20:15:24,546 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 1099 transitions, 12860 flow [2021-10-15 20:15:24,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:15:24,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:15:24,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 706 transitions. [2021-10-15 20:15:24,552 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.41824644549763035 [2021-10-15 20:15:24,552 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 706 transitions. [2021-10-15 20:15:24,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 706 transitions. [2021-10-15 20:15:24,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:15:24,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 706 transitions. [2021-10-15 20:15:24,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 176.5) internal successors, (706), 4 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:24,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:24,564 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:24,564 INFO L186 Difference]: Start difference. First operand has 207 places, 645 transitions, 8110 flow. Second operand 4 states and 706 transitions. [2021-10-15 20:15:24,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 1099 transitions, 12860 flow [2021-10-15 20:15:24,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 1099 transitions, 12426 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-10-15 20:15:24,682 INFO L242 Difference]: Finished difference. Result has 211 places, 730 transitions, 10362 flow [2021-10-15 20:15:24,683 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=7768, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=10362, PETRI_PLACES=211, PETRI_TRANSITIONS=730} [2021-10-15 20:15:24,684 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -31 predicate places. [2021-10-15 20:15:24,684 INFO L470 AbstractCegarLoop]: Abstraction has has 211 places, 730 transitions, 10362 flow [2021-10-15 20:15:24,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:24,684 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:15:24,685 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-10-15 20:15:24,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 20:15:24,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-15 20:15:24,911 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:15:24,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:15:24,911 INFO L82 PathProgramCache]: Analyzing trace with hash 223844596, now seen corresponding path program 1 times [2021-10-15 20:15:24,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:15:24,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392753197] [2021-10-15 20:15:24,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:24,912 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:15:25,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:25,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 1111 proven. 0 refuted. 0 times theorem prover too weak. 434 trivial. 0 not checked. [2021-10-15 20:15:25,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:15:25,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392753197] [2021-10-15 20:15:25,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392753197] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:15:25,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:15:25,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:15:25,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757200062] [2021-10-15 20:15:25,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:15:25,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:15:25,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:15:25,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:15:25,286 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:15:25,287 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 730 transitions, 10362 flow. Second operand has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:25,287 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:15:25,288 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:15:25,288 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:15:32,166 INFO L129 PetriNetUnfolder]: 539/8196 cut-off events. [2021-10-15 20:15:32,166 INFO L130 PetriNetUnfolder]: For 18060/18060 co-relation queries the response was YES. [2021-10-15 20:15:32,179 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20619 conditions, 8196 events. 539/8196 cut-off events. For 18060/18060 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 48239 event pairs, 0 based on Foata normal form. 49/8245 useless extension candidates. Maximal degree in co-relation 19025. Up to 6364 conditions per place. [2021-10-15 20:15:32,201 INFO L132 encePairwiseOnDemand]: 396/422 looper letters, 747 selfloop transitions, 130 changer transitions 0/882 dead transitions. [2021-10-15 20:15:32,202 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 882 transitions, 12030 flow [2021-10-15 20:15:32,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:15:32,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:15:32,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 458 transitions. [2021-10-15 20:15:32,205 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3617693522906793 [2021-10-15 20:15:32,206 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 458 transitions. [2021-10-15 20:15:32,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 458 transitions. [2021-10-15 20:15:32,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:15:32,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 458 transitions. [2021-10-15 20:15:32,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:32,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:32,213 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:32,214 INFO L186 Difference]: Start difference. First operand has 211 places, 730 transitions, 10362 flow. Second operand 3 states and 458 transitions. [2021-10-15 20:15:32,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 882 transitions, 12030 flow [2021-10-15 20:15:32,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 882 transitions, 12030 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:15:32,321 INFO L242 Difference]: Finished difference. Result has 215 places, 707 transitions, 10492 flow [2021-10-15 20:15:32,322 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=9846, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=10492, PETRI_PLACES=215, PETRI_TRANSITIONS=707} [2021-10-15 20:15:32,323 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -27 predicate places. [2021-10-15 20:15:32,323 INFO L470 AbstractCegarLoop]: Abstraction has has 215 places, 707 transitions, 10492 flow [2021-10-15 20:15:32,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:32,324 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:15:32,324 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:15:32,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-15 20:15:32,325 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:15:32,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:15:32,326 INFO L82 PathProgramCache]: Analyzing trace with hash -248319062, now seen corresponding path program 1 times [2021-10-15 20:15:32,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:15:32,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77203667] [2021-10-15 20:15:32,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:32,327 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:15:32,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:32,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 1003 proven. 0 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2021-10-15 20:15:32,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:15:32,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77203667] [2021-10-15 20:15:32,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77203667] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:15:32,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:15:32,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:15:32,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472934517] [2021-10-15 20:15:32,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:15:32,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:15:32,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:15:32,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:15:32,627 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:15:32,628 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 707 transitions, 10492 flow. Second operand has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:32,628 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:15:32,628 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:15:32,628 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:15:40,871 INFO L129 PetriNetUnfolder]: 596/9499 cut-off events. [2021-10-15 20:15:40,871 INFO L130 PetriNetUnfolder]: For 24746/24746 co-relation queries the response was YES. [2021-10-15 20:15:40,887 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24019 conditions, 9499 events. 596/9499 cut-off events. For 24746/24746 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 59075 event pairs, 0 based on Foata normal form. 106/9605 useless extension candidates. Maximal degree in co-relation 22469. Up to 5219 conditions per place. [2021-10-15 20:15:40,903 INFO L132 encePairwiseOnDemand]: 364/422 looper letters, 632 selfloop transitions, 302 changer transitions 0/939 dead transitions. [2021-10-15 20:15:40,903 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 939 transitions, 13878 flow [2021-10-15 20:15:40,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:15:40,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:15:40,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2021-10-15 20:15:40,906 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38704581358609796 [2021-10-15 20:15:40,906 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2021-10-15 20:15:40,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2021-10-15 20:15:40,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:15:40,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2021-10-15 20:15:40,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:40,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:40,914 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:40,915 INFO L186 Difference]: Start difference. First operand has 215 places, 707 transitions, 10492 flow. Second operand 3 states and 490 transitions. [2021-10-15 20:15:40,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 939 transitions, 13878 flow [2021-10-15 20:15:40,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 939 transitions, 13622 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:15:41,022 INFO L242 Difference]: Finished difference. Result has 217 places, 764 transitions, 12882 flow [2021-10-15 20:15:41,023 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=9138, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=12882, PETRI_PLACES=217, PETRI_TRANSITIONS=764} [2021-10-15 20:15:41,023 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -25 predicate places. [2021-10-15 20:15:41,024 INFO L470 AbstractCegarLoop]: Abstraction has has 217 places, 764 transitions, 12882 flow [2021-10-15 20:15:41,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:41,024 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:15:41,025 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:15:41,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-15 20:15:41,026 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:15:41,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:15:41,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1255761865, now seen corresponding path program 1 times [2021-10-15 20:15:41,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:15:41,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199539445] [2021-10-15 20:15:41,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:41,028 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:15:41,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:41,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 1118 proven. 93 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2021-10-15 20:15:41,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:15:41,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199539445] [2021-10-15 20:15:41,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199539445] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:15:41,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837082730] [2021-10-15 20:15:41,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:41,427 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:15:41,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:15:41,434 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:15:41,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 20:15:42,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:42,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 928 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 20:15:42,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:15:45,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 1211 proven. 0 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2021-10-15 20:15:45,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837082730] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:15:45,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:15:45,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-10-15 20:15:45,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703901040] [2021-10-15 20:15:45,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:15:45,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:15:45,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:15:45,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:15:45,194 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:15:45,195 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 764 transitions, 12882 flow. Second operand has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:45,195 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:15:45,195 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:15:45,195 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:15:54,166 INFO L129 PetriNetUnfolder]: 589/9492 cut-off events. [2021-10-15 20:15:54,166 INFO L130 PetriNetUnfolder]: For 26629/26629 co-relation queries the response was YES. [2021-10-15 20:15:54,183 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24551 conditions, 9492 events. 589/9492 cut-off events. For 26629/26629 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 59782 event pairs, 0 based on Foata normal form. 7/9499 useless extension candidates. Maximal degree in co-relation 22971. Up to 7283 conditions per place. [2021-10-15 20:15:54,199 INFO L132 encePairwiseOnDemand]: 403/422 looper letters, 805 selfloop transitions, 128 changer transitions 0/938 dead transitions. [2021-10-15 20:15:54,199 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 938 transitions, 15042 flow [2021-10-15 20:15:54,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:15:54,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:15:54,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 451 transitions. [2021-10-15 20:15:54,201 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.35624012638230645 [2021-10-15 20:15:54,202 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 451 transitions. [2021-10-15 20:15:54,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 451 transitions. [2021-10-15 20:15:54,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:15:54,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 451 transitions. [2021-10-15 20:15:54,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:54,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:54,209 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:54,209 INFO L186 Difference]: Start difference. First operand has 217 places, 764 transitions, 12882 flow. Second operand 3 states and 451 transitions. [2021-10-15 20:15:54,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 938 transitions, 15042 flow [2021-10-15 20:15:54,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 938 transitions, 14360 flow, removed 40 selfloop flow, removed 2 redundant places. [2021-10-15 20:15:54,308 INFO L242 Difference]: Finished difference. Result has 217 places, 757 transitions, 12292 flow [2021-10-15 20:15:54,309 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=12036, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=12292, PETRI_PLACES=217, PETRI_TRANSITIONS=757} [2021-10-15 20:15:54,310 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -25 predicate places. [2021-10-15 20:15:54,310 INFO L470 AbstractCegarLoop]: Abstraction has has 217 places, 757 transitions, 12292 flow [2021-10-15 20:15:54,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:54,310 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:15:54,311 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-10-15 20:15:54,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 20:15:54,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-15 20:15:54,513 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:15:54,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:15:54,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1244517444, now seen corresponding path program 1 times [2021-10-15 20:15:54,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:15:54,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836497063] [2021-10-15 20:15:54,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:54,514 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:15:54,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:54,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1716 backedges. 1036 proven. 0 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2021-10-15 20:15:54,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:15:54,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836497063] [2021-10-15 20:15:54,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836497063] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:15:54,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:15:54,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:15:54,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603456853] [2021-10-15 20:15:54,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:15:54,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:15:54,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:15:54,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:15:54,902 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:15:54,903 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 757 transitions, 12292 flow. Second operand has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:54,903 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:15:54,903 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:15:54,903 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:16:04,195 INFO L129 PetriNetUnfolder]: 523/9248 cut-off events. [2021-10-15 20:16:04,196 INFO L130 PetriNetUnfolder]: For 24235/24235 co-relation queries the response was YES. [2021-10-15 20:16:04,216 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23247 conditions, 9248 events. 523/9248 cut-off events. For 24235/24235 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 56135 event pairs, 0 based on Foata normal form. 64/9312 useless extension candidates. Maximal degree in co-relation 21705. Up to 7100 conditions per place. [2021-10-15 20:16:04,234 INFO L132 encePairwiseOnDemand]: 375/422 looper letters, 724 selfloop transitions, 137 changer transitions 0/866 dead transitions. [2021-10-15 20:16:04,234 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 866 transitions, 13024 flow [2021-10-15 20:16:04,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:16:04,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:16:04,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 475 transitions. [2021-10-15 20:16:04,240 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.37519747235387046 [2021-10-15 20:16:04,240 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 475 transitions. [2021-10-15 20:16:04,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 475 transitions. [2021-10-15 20:16:04,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:16:04,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 475 transitions. [2021-10-15 20:16:04,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:16:04,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:16:04,249 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:16:04,249 INFO L186 Difference]: Start difference. First operand has 217 places, 757 transitions, 12292 flow. Second operand 3 states and 475 transitions. [2021-10-15 20:16:04,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 866 transitions, 13024 flow [2021-10-15 20:16:04,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 866 transitions, 13024 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:16:04,388 INFO L242 Difference]: Finished difference. Result has 219 places, 691 transitions, 11226 flow [2021-10-15 20:16:04,389 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=10952, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=11226, PETRI_PLACES=219, PETRI_TRANSITIONS=691} [2021-10-15 20:16:04,390 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -23 predicate places. [2021-10-15 20:16:04,390 INFO L470 AbstractCegarLoop]: Abstraction has has 219 places, 691 transitions, 11226 flow [2021-10-15 20:16:04,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:16:04,391 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:16:04,391 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:16:04,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-15 20:16:04,392 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:16:04,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:16:04,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1327784350, now seen corresponding path program 1 times [2021-10-15 20:16:04,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:16:04,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978501919] [2021-10-15 20:16:04,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:16:04,394 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:16:04,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:04,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2182 backedges. 1166 proven. 72 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2021-10-15 20:16:04,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:16:04,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978501919] [2021-10-15 20:16:04,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978501919] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:16:04,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413000473] [2021-10-15 20:16:04,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:16:04,931 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:16:04,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:04,935 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:16:04,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 20:16:06,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:06,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 1028 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-15 20:16:06,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:16:09,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2182 backedges. 879 proven. 0 refuted. 0 times theorem prover too weak. 1303 trivial. 0 not checked. [2021-10-15 20:16:09,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413000473] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:16:09,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:16:09,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2021-10-15 20:16:09,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117700839] [2021-10-15 20:16:09,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:16:09,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:16:09,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:16:09,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:16:09,011 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:16:09,012 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 691 transitions, 11226 flow. Second operand has 4 states, 4 states have (on average 88.75) internal successors, (355), 4 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:16:09,012 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:16:09,012 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:16:09,012 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:16:19,672 INFO L129 PetriNetUnfolder]: 590/10739 cut-off events. [2021-10-15 20:16:19,673 INFO L130 PetriNetUnfolder]: For 27612/27612 co-relation queries the response was YES. [2021-10-15 20:16:19,695 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27038 conditions, 10739 events. 590/10739 cut-off events. For 27612/27612 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 70761 event pairs, 0 based on Foata normal form. 30/10769 useless extension candidates. Maximal degree in co-relation 24717. Up to 6806 conditions per place. [2021-10-15 20:16:19,722 INFO L132 encePairwiseOnDemand]: 372/422 looper letters, 878 selfloop transitions, 232 changer transitions 0/1115 dead transitions. [2021-10-15 20:16:19,722 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 1115 transitions, 15804 flow [2021-10-15 20:16:19,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:16:19,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:16:19,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 692 transitions. [2021-10-15 20:16:19,728 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4099526066350711 [2021-10-15 20:16:19,728 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 692 transitions. [2021-10-15 20:16:19,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 692 transitions. [2021-10-15 20:16:19,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:16:19,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 692 transitions. [2021-10-15 20:16:19,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:16:19,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:16:19,738 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:16:19,738 INFO L186 Difference]: Start difference. First operand has 219 places, 691 transitions, 11226 flow. Second operand 4 states and 692 transitions. [2021-10-15 20:16:19,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 1115 transitions, 15804 flow [2021-10-15 20:16:19,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 1115 transitions, 15645 flow, removed 3 selfloop flow, removed 1 redundant places. [2021-10-15 20:16:19,880 INFO L242 Difference]: Finished difference. Result has 224 places, 750 transitions, 13491 flow [2021-10-15 20:16:19,881 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=11085, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=13491, PETRI_PLACES=224, PETRI_TRANSITIONS=750} [2021-10-15 20:16:19,881 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -18 predicate places. [2021-10-15 20:16:19,881 INFO L470 AbstractCegarLoop]: Abstraction has has 224 places, 750 transitions, 13491 flow [2021-10-15 20:16:19,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 88.75) internal successors, (355), 4 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:16:19,882 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:16:19,882 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-10-15 20:16:19,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-10-15 20:16:20,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-15 20:16:20,083 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:16:20,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:16:20,084 INFO L82 PathProgramCache]: Analyzing trace with hash 776024818, now seen corresponding path program 1 times [2021-10-15 20:16:20,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:16:20,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314781388] [2021-10-15 20:16:20,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:16:20,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:16:20,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:20,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 797 proven. 0 refuted. 0 times theorem prover too weak. 1115 trivial. 0 not checked. [2021-10-15 20:16:20,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:16:20,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314781388] [2021-10-15 20:16:20,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314781388] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:16:20,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:16:20,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:16:20,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686031259] [2021-10-15 20:16:20,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:16:20,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:16:20,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:16:20,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:16:20,465 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:16:20,465 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 750 transitions, 13491 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:16:20,465 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:16:20,465 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:16:20,466 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:16:31,909 INFO L129 PetriNetUnfolder]: 525/10496 cut-off events. [2021-10-15 20:16:31,909 INFO L130 PetriNetUnfolder]: For 31433/31433 co-relation queries the response was YES. [2021-10-15 20:16:31,935 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26428 conditions, 10496 events. 525/10496 cut-off events. For 31433/31433 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 68918 event pairs, 0 based on Foata normal form. 64/10560 useless extension candidates. Maximal degree in co-relation 24668. Up to 7704 conditions per place. [2021-10-15 20:16:31,951 INFO L132 encePairwiseOnDemand]: 378/422 looper letters, 660 selfloop transitions, 200 changer transitions 0/865 dead transitions. [2021-10-15 20:16:31,951 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 865 transitions, 14364 flow [2021-10-15 20:16:31,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:16:31,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:16:31,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 474 transitions. [2021-10-15 20:16:31,954 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3744075829383886 [2021-10-15 20:16:31,954 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 474 transitions. [2021-10-15 20:16:31,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 474 transitions. [2021-10-15 20:16:31,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:16:31,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 474 transitions. [2021-10-15 20:16:31,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:16:31,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:16:31,958 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:16:31,958 INFO L186 Difference]: Start difference. First operand has 224 places, 750 transitions, 13491 flow. Second operand 3 states and 474 transitions. [2021-10-15 20:16:31,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 865 transitions, 14364 flow [2021-10-15 20:16:32,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 865 transitions, 14328 flow, removed 18 selfloop flow, removed 0 redundant places. [2021-10-15 20:16:32,113 INFO L242 Difference]: Finished difference. Result has 226 places, 690 transitions, 12658 flow [2021-10-15 20:16:32,114 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=12258, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=12658, PETRI_PLACES=226, PETRI_TRANSITIONS=690} [2021-10-15 20:16:32,114 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -16 predicate places. [2021-10-15 20:16:32,115 INFO L470 AbstractCegarLoop]: Abstraction has has 226 places, 690 transitions, 12658 flow [2021-10-15 20:16:32,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:16:32,115 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:16:32,116 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-10-15 20:16:32,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-15 20:16:32,116 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:16:32,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:16:32,117 INFO L82 PathProgramCache]: Analyzing trace with hash 580335584, now seen corresponding path program 1 times [2021-10-15 20:16:32,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:16:32,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144956959] [2021-10-15 20:16:32,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:16:32,118 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:16:32,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:32,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2218 backedges. 1202 proven. 72 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2021-10-15 20:16:32,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:16:32,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144956959] [2021-10-15 20:16:32,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144956959] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:16:32,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071560892] [2021-10-15 20:16:32,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:16:32,533 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:16:32,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:32,534 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:16:32,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 20:16:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:34,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 1061 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-15 20:16:34,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:16:36,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2218 backedges. 915 proven. 0 refuted. 0 times theorem prover too weak. 1303 trivial. 0 not checked. [2021-10-15 20:16:36,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071560892] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:16:36,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:16:36,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2021-10-15 20:16:36,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878412898] [2021-10-15 20:16:36,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:16:36,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:16:36,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:16:36,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:16:36,953 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:16:36,953 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 690 transitions, 12658 flow. Second operand has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:16:36,954 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:16:36,954 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:16:36,954 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:16:47,884 INFO L129 PetriNetUnfolder]: 535/10684 cut-off events. [2021-10-15 20:16:47,885 INFO L130 PetriNetUnfolder]: For 32118/32118 co-relation queries the response was YES. [2021-10-15 20:16:47,922 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27107 conditions, 10684 events. 535/10684 cut-off events. For 32118/32118 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 70498 event pairs, 0 based on Foata normal form. 4/10688 useless extension candidates. Maximal degree in co-relation 25294. Up to 6786 conditions per place. [2021-10-15 20:16:47,949 INFO L132 encePairwiseOnDemand]: 377/422 looper letters, 823 selfloop transitions, 232 changer transitions 0/1060 dead transitions. [2021-10-15 20:16:47,949 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 1060 transitions, 15946 flow [2021-10-15 20:16:47,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:16:47,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:16:47,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 672 transitions. [2021-10-15 20:16:47,953 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3981042654028436 [2021-10-15 20:16:47,954 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 672 transitions. [2021-10-15 20:16:47,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 672 transitions. [2021-10-15 20:16:47,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:16:47,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 672 transitions. [2021-10-15 20:16:47,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:16:47,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:16:47,963 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:16:47,963 INFO L186 Difference]: Start difference. First operand has 226 places, 690 transitions, 12658 flow. Second operand 4 states and 672 transitions. [2021-10-15 20:16:47,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 1060 transitions, 15946 flow [2021-10-15 20:16:48,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 1060 transitions, 15521 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:16:48,101 INFO L242 Difference]: Finished difference. Result has 229 places, 702 transitions, 13309 flow [2021-10-15 20:16:48,102 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=12257, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=13309, PETRI_PLACES=229, PETRI_TRANSITIONS=702} [2021-10-15 20:16:48,103 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -13 predicate places. [2021-10-15 20:16:48,103 INFO L470 AbstractCegarLoop]: Abstraction has has 229 places, 702 transitions, 13309 flow [2021-10-15 20:16:48,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:16:48,104 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:16:48,104 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-10-15 20:16:48,143 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-10-15 20:16:48,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:16:48,321 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:16:48,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:16:48,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1968437427, now seen corresponding path program 1 times [2021-10-15 20:16:48,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:16:48,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931673278] [2021-10-15 20:16:48,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:16:48,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:16:48,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2219 backedges. 1203 proven. 72 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2021-10-15 20:16:48,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:16:48,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931673278] [2021-10-15 20:16:48,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931673278] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:16:48,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284208168] [2021-10-15 20:16:48,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:16:48,740 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:16:48,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:16:48,741 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:16:48,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-15 20:16:50,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:16:50,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-15 20:16:50,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:16:56,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2219 backedges. 1305 proven. 523 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2021-10-15 20:16:56,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284208168] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:16:56,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:16:56,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-10-15 20:16:56,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251757438] [2021-10-15 20:16:56,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 20:16:56,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:16:56,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 20:16:56,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:16:56,219 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:16:56,219 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 702 transitions, 13309 flow. Second operand has 7 states, 7 states have (on average 99.14285714285714) internal successors, (694), 7 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:16:56,220 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:16:56,220 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:16:56,220 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:17:09,499 INFO L129 PetriNetUnfolder]: 589/12164 cut-off events. [2021-10-15 20:17:09,499 INFO L130 PetriNetUnfolder]: For 40763/40763 co-relation queries the response was YES. [2021-10-15 20:17:09,537 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30859 conditions, 12164 events. 589/12164 cut-off events. For 40763/40763 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 87715 event pairs, 0 based on Foata normal form. 27/12191 useless extension candidates. Maximal degree in co-relation 28179. Up to 3150 conditions per place. [2021-10-15 20:17:09,566 INFO L132 encePairwiseOnDemand]: 370/422 looper letters, 1219 selfloop transitions, 413 changer transitions 0/1637 dead transitions. [2021-10-15 20:17:09,566 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 1637 transitions, 19901 flow [2021-10-15 20:17:09,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 20:17:09,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 20:17:09,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1297 transitions. [2021-10-15 20:17:09,572 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43906567366283006 [2021-10-15 20:17:09,572 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1297 transitions. [2021-10-15 20:17:09,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1297 transitions. [2021-10-15 20:17:09,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:17:09,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1297 transitions. [2021-10-15 20:17:09,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 185.28571428571428) internal successors, (1297), 7 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:09,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 422.0) internal successors, (3376), 8 states have internal predecessors, (3376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:09,589 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 422.0) internal successors, (3376), 8 states have internal predecessors, (3376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:09,589 INFO L186 Difference]: Start difference. First operand has 229 places, 702 transitions, 13309 flow. Second operand 7 states and 1297 transitions. [2021-10-15 20:17:09,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 1637 transitions, 19901 flow [2021-10-15 20:17:09,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 1637 transitions, 19454 flow, removed 36 selfloop flow, removed 2 redundant places. [2021-10-15 20:17:09,808 INFO L242 Difference]: Finished difference. Result has 238 places, 754 transitions, 15843 flow [2021-10-15 20:17:09,810 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=12170, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=336, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=15843, PETRI_PLACES=238, PETRI_TRANSITIONS=754} [2021-10-15 20:17:09,810 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -4 predicate places. [2021-10-15 20:17:09,810 INFO L470 AbstractCegarLoop]: Abstraction has has 238 places, 754 transitions, 15843 flow [2021-10-15 20:17:09,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 99.14285714285714) internal successors, (694), 7 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:09,811 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:17:09,812 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-10-15 20:17:09,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-15 20:17:10,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:17:10,039 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:17:10,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:17:10,040 INFO L82 PathProgramCache]: Analyzing trace with hash 219972304, now seen corresponding path program 1 times [2021-10-15 20:17:10,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:17:10,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665574048] [2021-10-15 20:17:10,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:17:10,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:17:10,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:17:10,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2215 backedges. 1228 proven. 0 refuted. 0 times theorem prover too weak. 987 trivial. 0 not checked. [2021-10-15 20:17:10,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:17:10,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665574048] [2021-10-15 20:17:10,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665574048] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:17:10,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:17:10,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:17:10,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283787954] [2021-10-15 20:17:10,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:17:10,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:17:10,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:17:10,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:17:10,508 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:17:10,509 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 754 transitions, 15843 flow. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:10,509 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:17:10,509 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:17:10,510 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:17:22,933 INFO L129 PetriNetUnfolder]: 534/11931 cut-off events. [2021-10-15 20:17:22,933 INFO L130 PetriNetUnfolder]: For 45080/45080 co-relation queries the response was YES. [2021-10-15 20:17:22,964 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30312 conditions, 11931 events. 534/11931 cut-off events. For 45080/45080 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 82927 event pairs, 0 based on Foata normal form. 54/11985 useless extension candidates. Maximal degree in co-relation 27803. Up to 9869 conditions per place. [2021-10-15 20:17:22,982 INFO L132 encePairwiseOnDemand]: 366/422 looper letters, 700 selfloop transitions, 170 changer transitions 0/875 dead transitions. [2021-10-15 20:17:22,983 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 875 transitions, 16482 flow [2021-10-15 20:17:22,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:17:22,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:17:22,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 489 transitions. [2021-10-15 20:17:22,985 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3862559241706161 [2021-10-15 20:17:22,985 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 489 transitions. [2021-10-15 20:17:22,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 489 transitions. [2021-10-15 20:17:22,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:17:22,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 489 transitions. [2021-10-15 20:17:22,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:22,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:22,991 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:22,992 INFO L186 Difference]: Start difference. First operand has 238 places, 754 transitions, 15843 flow. Second operand 3 states and 489 transitions. [2021-10-15 20:17:22,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 875 transitions, 16482 flow [2021-10-15 20:17:23,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 875 transitions, 16414 flow, removed 34 selfloop flow, removed 0 redundant places. [2021-10-15 20:17:23,172 INFO L242 Difference]: Finished difference. Result has 241 places, 700 transitions, 14836 flow [2021-10-15 20:17:23,173 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=14324, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=14836, PETRI_PLACES=241, PETRI_TRANSITIONS=700} [2021-10-15 20:17:23,173 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -1 predicate places. [2021-10-15 20:17:23,174 INFO L470 AbstractCegarLoop]: Abstraction has has 241 places, 700 transitions, 14836 flow [2021-10-15 20:17:23,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:23,175 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:17:23,176 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:17:23,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-15 20:17:23,176 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:17:23,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:17:23,177 INFO L82 PathProgramCache]: Analyzing trace with hash 39916617, now seen corresponding path program 1 times [2021-10-15 20:17:23,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:17:23,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123843240] [2021-10-15 20:17:23,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:17:23,178 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:17:23,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:17:23,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2707 backedges. 825 proven. 0 refuted. 0 times theorem prover too weak. 1882 trivial. 0 not checked. [2021-10-15 20:17:23,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:17:23,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123843240] [2021-10-15 20:17:23,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123843240] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:17:23,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:17:23,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 20:17:23,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983241703] [2021-10-15 20:17:23,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 20:17:23,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:17:23,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 20:17:23,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:17:23,675 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:17:23,676 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 700 transitions, 14836 flow. Second operand has 7 states, 7 states have (on average 48.42857142857143) internal successors, (339), 7 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:23,676 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:17:23,677 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:17:23,677 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:17:32,667 INFO L129 PetriNetUnfolder]: 410/10399 cut-off events. [2021-10-15 20:17:32,667 INFO L130 PetriNetUnfolder]: For 33933/33933 co-relation queries the response was YES. [2021-10-15 20:17:32,689 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25939 conditions, 10399 events. 410/10399 cut-off events. For 33933/33933 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 67504 event pairs, 0 based on Foata normal form. 11/10410 useless extension candidates. Maximal degree in co-relation 25098. Up to 9424 conditions per place. [2021-10-15 20:17:32,702 INFO L132 encePairwiseOnDemand]: 402/422 looper letters, 709 selfloop transitions, 71 changer transitions 39/824 dead transitions. [2021-10-15 20:17:32,702 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 824 transitions, 13962 flow [2021-10-15 20:17:32,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 20:17:32,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 20:17:32,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 522 transitions. [2021-10-15 20:17:32,704 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.17670954637779282 [2021-10-15 20:17:32,705 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 522 transitions. [2021-10-15 20:17:32,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 522 transitions. [2021-10-15 20:17:32,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:17:32,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 522 transitions. [2021-10-15 20:17:32,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 74.57142857142857) internal successors, (522), 7 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:32,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 422.0) internal successors, (3376), 8 states have internal predecessors, (3376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:32,709 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 422.0) internal successors, (3376), 8 states have internal predecessors, (3376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:32,710 INFO L186 Difference]: Start difference. First operand has 241 places, 700 transitions, 14836 flow. Second operand 7 states and 522 transitions. [2021-10-15 20:17:32,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 824 transitions, 13962 flow [2021-10-15 20:17:32,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 824 transitions, 13414 flow, removed 4 selfloop flow, removed 6 redundant places. [2021-10-15 20:17:32,816 INFO L242 Difference]: Finished difference. Result has 245 places, 573 transitions, 10625 flow [2021-10-15 20:17:32,817 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=11334, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10625, PETRI_PLACES=245, PETRI_TRANSITIONS=573} [2021-10-15 20:17:32,817 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 3 predicate places. [2021-10-15 20:17:32,817 INFO L470 AbstractCegarLoop]: Abstraction has has 245 places, 573 transitions, 10625 flow [2021-10-15 20:17:32,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 48.42857142857143) internal successors, (339), 7 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:32,817 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:17:32,818 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:17:32,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-15 20:17:32,818 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:17:32,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:17:32,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1446623235, now seen corresponding path program 1 times [2021-10-15 20:17:32,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:17:32,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331651288] [2021-10-15 20:17:32,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:17:32,820 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:17:32,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:17:33,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2464 backedges. 670 proven. 43 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2021-10-15 20:17:33,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:17:33,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331651288] [2021-10-15 20:17:33,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331651288] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:17:33,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399045017] [2021-10-15 20:17:33,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:17:33,177 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:17:33,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:17:33,182 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:17:33,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-15 20:17:35,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:17:35,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 1145 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-15 20:17:35,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:17:41,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2464 backedges. 629 proven. 720 refuted. 0 times theorem prover too weak. 1115 trivial. 0 not checked. [2021-10-15 20:17:41,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399045017] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:17:41,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:17:41,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7] total 9 [2021-10-15 20:17:41,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675244107] [2021-10-15 20:17:41,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 20:17:41,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:17:41,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 20:17:41,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-15 20:17:41,952 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 422 [2021-10-15 20:17:41,953 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 573 transitions, 10625 flow. Second operand has 9 states, 9 states have (on average 82.11111111111111) internal successors, (739), 9 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:41,953 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:17:41,953 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 422 [2021-10-15 20:17:41,953 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:17:58,141 INFO L129 PetriNetUnfolder]: 363/10576 cut-off events. [2021-10-15 20:17:58,141 INFO L130 PetriNetUnfolder]: For 30847/30847 co-relation queries the response was YES. [2021-10-15 20:17:58,186 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25710 conditions, 10576 events. 363/10576 cut-off events. For 30847/30847 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 62636 event pairs, 0 based on Foata normal form. 49/10625 useless extension candidates. Maximal degree in co-relation 25120. Up to 5728 conditions per place. [2021-10-15 20:17:58,206 INFO L132 encePairwiseOnDemand]: 382/422 looper letters, 1574 selfloop transitions, 203 changer transitions 7/1788 dead transitions. [2021-10-15 20:17:58,206 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 1788 transitions, 16174 flow [2021-10-15 20:17:58,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-15 20:17:58,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-15 20:17:58,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1654 transitions. [2021-10-15 20:17:58,215 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3014947138169887 [2021-10-15 20:17:58,216 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1654 transitions. [2021-10-15 20:17:58,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1654 transitions. [2021-10-15 20:17:58,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:17:58,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1654 transitions. [2021-10-15 20:17:58,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 127.23076923076923) internal successors, (1654), 13 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:58,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 422.0) internal successors, (5908), 14 states have internal predecessors, (5908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:58,235 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 422.0) internal successors, (5908), 14 states have internal predecessors, (5908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:58,235 INFO L186 Difference]: Start difference. First operand has 245 places, 573 transitions, 10625 flow. Second operand 13 states and 1654 transitions. [2021-10-15 20:17:58,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 1788 transitions, 16174 flow [2021-10-15 20:17:58,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 1788 transitions, 16053 flow, removed 12 selfloop flow, removed 4 redundant places. [2021-10-15 20:17:58,375 INFO L242 Difference]: Finished difference. Result has 258 places, 551 transitions, 10410 flow [2021-10-15 20:17:58,376 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=9715, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10410, PETRI_PLACES=258, PETRI_TRANSITIONS=551} [2021-10-15 20:17:58,376 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 16 predicate places. [2021-10-15 20:17:58,377 INFO L470 AbstractCegarLoop]: Abstraction has has 258 places, 551 transitions, 10410 flow [2021-10-15 20:17:58,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 82.11111111111111) internal successors, (739), 9 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:17:58,377 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:17:58,378 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:17:58,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-15 20:17:58,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:17:58,587 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:17:58,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:17:58,587 INFO L82 PathProgramCache]: Analyzing trace with hash 959953204, now seen corresponding path program 1 times [2021-10-15 20:17:58,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:17:58,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003936897] [2021-10-15 20:17:58,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:17:58,588 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:17:58,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:17:59,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3286 backedges. 782 proven. 43 refuted. 0 times theorem prover too weak. 2461 trivial. 0 not checked. [2021-10-15 20:17:59,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:17:59,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003936897] [2021-10-15 20:17:59,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003936897] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:17:59,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327179910] [2021-10-15 20:17:59,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:17:59,340 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:17:59,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:17:59,343 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:17:59,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-15 20:18:02,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:18:02,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 1296 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 20:18:02,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:18:06,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3286 backedges. 0 proven. 825 refuted. 0 times theorem prover too weak. 2461 trivial. 0 not checked. [2021-10-15 20:18:06,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327179910] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:18:06,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:18:06,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-15 20:18:06,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973046598] [2021-10-15 20:18:06,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:18:06,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:18:06,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:18:06,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:18:06,376 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:18:06,377 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 551 transitions, 10410 flow. Second operand has 5 states, 5 states have (on average 98.4) internal successors, (492), 5 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:06,377 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:18:06,377 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:18:06,377 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:18:21,153 INFO L129 PetriNetUnfolder]: 343/10470 cut-off events. [2021-10-15 20:18:21,154 INFO L130 PetriNetUnfolder]: For 30563/30563 co-relation queries the response was YES. [2021-10-15 20:18:21,195 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25554 conditions, 10470 events. 343/10470 cut-off events. For 30563/30563 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 52925 event pairs, 0 based on Foata normal form. 18/10488 useless extension candidates. Maximal degree in co-relation 24987. Up to 5548 conditions per place. [2021-10-15 20:18:21,211 INFO L132 encePairwiseOnDemand]: 370/422 looper letters, 1011 selfloop transitions, 211 changer transitions 5/1236 dead transitions. [2021-10-15 20:18:21,211 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 1236 transitions, 13771 flow [2021-10-15 20:18:21,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 20:18:21,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 20:18:21,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1045 transitions. [2021-10-15 20:18:21,217 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4127172195892575 [2021-10-15 20:18:21,217 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1045 transitions. [2021-10-15 20:18:21,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1045 transitions. [2021-10-15 20:18:21,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:18:21,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1045 transitions. [2021-10-15 20:18:21,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 174.16666666666666) internal successors, (1045), 6 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:21,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:21,228 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:21,228 INFO L186 Difference]: Start difference. First operand has 258 places, 551 transitions, 10410 flow. Second operand 6 states and 1045 transitions. [2021-10-15 20:18:21,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 1236 transitions, 13771 flow [2021-10-15 20:18:21,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 1236 transitions, 13222 flow, removed 155 selfloop flow, removed 3 redundant places. [2021-10-15 20:18:21,340 INFO L242 Difference]: Finished difference. Result has 261 places, 531 transitions, 9696 flow [2021-10-15 20:18:21,341 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=9324, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9696, PETRI_PLACES=261, PETRI_TRANSITIONS=531} [2021-10-15 20:18:21,342 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 19 predicate places. [2021-10-15 20:18:21,342 INFO L470 AbstractCegarLoop]: Abstraction has has 261 places, 531 transitions, 9696 flow [2021-10-15 20:18:21,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.4) internal successors, (492), 5 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:21,342 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:18:21,343 INFO L254 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:18:21,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-15 20:18:21,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-15 20:18:21,558 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:18:21,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:18:21,559 INFO L82 PathProgramCache]: Analyzing trace with hash 960342611, now seen corresponding path program 1 times [2021-10-15 20:18:21,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:18:21,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027287378] [2021-10-15 20:18:21,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:18:21,560 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:18:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:18:22,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5988 backedges. 1412 proven. 0 refuted. 0 times theorem prover too weak. 4576 trivial. 0 not checked. [2021-10-15 20:18:22,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:18:22,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027287378] [2021-10-15 20:18:22,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027287378] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:18:22,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:18:22,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:18:22,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945897787] [2021-10-15 20:18:22,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:18:22,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:18:22,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:18:22,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:18:22,330 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:18:22,331 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 531 transitions, 9696 flow. Second operand has 5 states, 5 states have (on average 72.2) internal successors, (361), 5 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:22,331 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:18:22,331 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:18:22,331 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:18:35,755 INFO L129 PetriNetUnfolder]: 340/10405 cut-off events. [2021-10-15 20:18:35,755 INFO L130 PetriNetUnfolder]: For 28133/28133 co-relation queries the response was YES. [2021-10-15 20:18:35,792 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25299 conditions, 10405 events. 340/10405 cut-off events. For 28133/28133 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 52651 event pairs, 0 based on Foata normal form. 1/10406 useless extension candidates. Maximal degree in co-relation 24749. Up to 6895 conditions per place. [2021-10-15 20:18:35,808 INFO L132 encePairwiseOnDemand]: 379/422 looper letters, 748 selfloop transitions, 120 changer transitions 23/900 dead transitions. [2021-10-15 20:18:35,808 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 900 transitions, 12210 flow [2021-10-15 20:18:35,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:18:35,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:18:35,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 687 transitions. [2021-10-15 20:18:35,812 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.32559241706161135 [2021-10-15 20:18:35,812 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 687 transitions. [2021-10-15 20:18:35,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 687 transitions. [2021-10-15 20:18:35,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:18:35,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 687 transitions. [2021-10-15 20:18:35,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 137.4) internal successors, (687), 5 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:35,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 422.0) internal successors, (2532), 6 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:35,821 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 422.0) internal successors, (2532), 6 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:35,821 INFO L186 Difference]: Start difference. First operand has 261 places, 531 transitions, 9696 flow. Second operand 5 states and 687 transitions. [2021-10-15 20:18:35,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 900 transitions, 12210 flow [2021-10-15 20:18:35,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 900 transitions, 12188 flow, removed 7 selfloop flow, removed 1 redundant places. [2021-10-15 20:18:35,922 INFO L242 Difference]: Finished difference. Result has 265 places, 527 transitions, 9801 flow [2021-10-15 20:18:35,923 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=9650, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=9801, PETRI_PLACES=265, PETRI_TRANSITIONS=527} [2021-10-15 20:18:35,923 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 23 predicate places. [2021-10-15 20:18:35,923 INFO L470 AbstractCegarLoop]: Abstraction has has 265 places, 527 transitions, 9801 flow [2021-10-15 20:18:35,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 72.2) internal successors, (361), 5 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:35,924 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:18:35,924 INFO L254 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 7, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:18:35,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-10-15 20:18:35,925 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:18:35,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:18:35,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1140105243, now seen corresponding path program 1 times [2021-10-15 20:18:35,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:18:35,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574400147] [2021-10-15 20:18:35,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:18:35,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:18:36,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:18:36,654 INFO L134 CoverageAnalysis]: Checked inductivity of 7218 backedges. 822 proven. 819 refuted. 0 times theorem prover too weak. 5577 trivial. 0 not checked. [2021-10-15 20:18:36,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:18:36,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574400147] [2021-10-15 20:18:36,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574400147] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:18:36,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142656266] [2021-10-15 20:18:36,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:18:36,655 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:18:36,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:18:36,659 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:18:36,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-15 20:18:39,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:18:39,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 1855 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 20:18:39,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:18:43,271 INFO L134 CoverageAnalysis]: Checked inductivity of 7218 backedges. 1641 proven. 0 refuted. 0 times theorem prover too weak. 5577 trivial. 0 not checked. [2021-10-15 20:18:43,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142656266] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:18:43,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:18:43,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-10-15 20:18:43,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9628537] [2021-10-15 20:18:43,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:18:43,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:18:43,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:18:43,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:18:43,275 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:18:43,275 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 527 transitions, 9801 flow. Second operand has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:43,276 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:18:43,276 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:18:43,276 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:18:56,770 INFO L129 PetriNetUnfolder]: 224/9731 cut-off events. [2021-10-15 20:18:56,771 INFO L130 PetriNetUnfolder]: For 28937/28937 co-relation queries the response was YES. [2021-10-15 20:18:56,812 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22380 conditions, 9731 events. 224/9731 cut-off events. For 28937/28937 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 41961 event pairs, 0 based on Foata normal form. 109/9840 useless extension candidates. Maximal degree in co-relation 22287. Up to 4879 conditions per place. [2021-10-15 20:18:56,822 INFO L132 encePairwiseOnDemand]: 377/422 looper letters, 462 selfloop transitions, 34 changer transitions 83/588 dead transitions. [2021-10-15 20:18:56,822 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 588 transitions, 7779 flow [2021-10-15 20:18:56,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:18:56,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:18:56,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 456 transitions. [2021-10-15 20:18:56,824 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.36018957345971564 [2021-10-15 20:18:56,824 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 456 transitions. [2021-10-15 20:18:56,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 456 transitions. [2021-10-15 20:18:56,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:18:56,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 456 transitions. [2021-10-15 20:18:56,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:56,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:56,829 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:56,829 INFO L186 Difference]: Start difference. First operand has 265 places, 527 transitions, 9801 flow. Second operand 3 states and 456 transitions. [2021-10-15 20:18:56,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 588 transitions, 7779 flow [2021-10-15 20:18:56,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 588 transitions, 7147 flow, removed 38 selfloop flow, removed 11 redundant places. [2021-10-15 20:18:56,906 INFO L242 Difference]: Finished difference. Result has 255 places, 330 transitions, 3635 flow [2021-10-15 20:18:56,906 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=5631, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3635, PETRI_PLACES=255, PETRI_TRANSITIONS=330} [2021-10-15 20:18:56,906 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 13 predicate places. [2021-10-15 20:18:56,907 INFO L470 AbstractCegarLoop]: Abstraction has has 255 places, 330 transitions, 3635 flow [2021-10-15 20:18:56,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:18:56,907 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:18:56,908 INFO L254 CegarLoopForPetriNet]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 10, 10, 10, 9, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:18:56,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-15 20:18:57,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-15 20:18:57,109 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:18:57,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:18:57,110 INFO L82 PathProgramCache]: Analyzing trace with hash -382520307, now seen corresponding path program 1 times [2021-10-15 20:18:57,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:18:57,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655331485] [2021-10-15 20:18:57,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:18:57,110 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:18:57,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:18:58,503 INFO L134 CoverageAnalysis]: Checked inductivity of 11114 backedges. 6881 proven. 89 refuted. 0 times theorem prover too weak. 4144 trivial. 0 not checked. [2021-10-15 20:18:58,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:18:58,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655331485] [2021-10-15 20:18:58,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655331485] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:18:58,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203394581] [2021-10-15 20:18:58,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:18:58,505 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:18:58,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:18:58,510 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:18:58,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-15 20:19:01,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:19:01,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 2241 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 20:19:01,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:19:06,279 INFO L134 CoverageAnalysis]: Checked inductivity of 11114 backedges. 6236 proven. 0 refuted. 0 times theorem prover too weak. 4878 trivial. 0 not checked. [2021-10-15 20:19:06,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203394581] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:19:06,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:19:06,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-10-15 20:19:06,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836353593] [2021-10-15 20:19:06,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:19:06,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:19:06,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:19:06,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:19:06,284 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:19:06,285 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 330 transitions, 3635 flow. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:06,285 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:19:06,285 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:19:06,285 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:19:09,595 INFO L129 PetriNetUnfolder]: 78/4420 cut-off events. [2021-10-15 20:19:09,596 INFO L130 PetriNetUnfolder]: For 6448/6448 co-relation queries the response was YES. [2021-10-15 20:19:09,605 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9698 conditions, 4420 events. 78/4420 cut-off events. For 6448/6448 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 7264 event pairs, 0 based on Foata normal form. 39/4459 useless extension candidates. Maximal degree in co-relation 8997. Up to 2528 conditions per place. [2021-10-15 20:19:09,611 INFO L132 encePairwiseOnDemand]: 400/422 looper letters, 415 selfloop transitions, 18 changer transitions 0/442 dead transitions. [2021-10-15 20:19:09,611 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 442 transitions, 3232 flow [2021-10-15 20:19:09,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:19:09,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:19:09,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 423 transitions. [2021-10-15 20:19:09,613 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3341232227488152 [2021-10-15 20:19:09,613 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 423 transitions. [2021-10-15 20:19:09,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 423 transitions. [2021-10-15 20:19:09,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:19:09,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 423 transitions. [2021-10-15 20:19:09,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:09,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:09,618 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:09,618 INFO L186 Difference]: Start difference. First operand has 255 places, 330 transitions, 3635 flow. Second operand 3 states and 423 transitions. [2021-10-15 20:19:09,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 442 transitions, 3232 flow [2021-10-15 20:19:09,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 442 transitions, 2955 flow, removed 44 selfloop flow, removed 13 redundant places. [2021-10-15 20:19:09,649 INFO L242 Difference]: Finished difference. Result has 244 places, 267 transitions, 1767 flow [2021-10-15 20:19:09,650 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1731, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1767, PETRI_PLACES=244, PETRI_TRANSITIONS=267} [2021-10-15 20:19:09,650 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 2 predicate places. [2021-10-15 20:19:09,650 INFO L470 AbstractCegarLoop]: Abstraction has has 244 places, 267 transitions, 1767 flow [2021-10-15 20:19:09,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:09,650 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:19:09,652 INFO L254 CegarLoopForPetriNet]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 10, 10, 10, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:19:09,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-10-15 20:19:09,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-15 20:19:09,855 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:19:09,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:19:09,855 INFO L82 PathProgramCache]: Analyzing trace with hash -373930403, now seen corresponding path program 1 times [2021-10-15 20:19:09,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:19:09,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700045044] [2021-10-15 20:19:09,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:19:09,856 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:19:10,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:19:10,926 INFO L134 CoverageAnalysis]: Checked inductivity of 11284 backedges. 6811 proven. 0 refuted. 0 times theorem prover too weak. 4473 trivial. 0 not checked. [2021-10-15 20:19:10,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:19:10,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700045044] [2021-10-15 20:19:10,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700045044] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:19:10,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:19:10,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:19:10,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857785918] [2021-10-15 20:19:10,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:19:10,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:19:10,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:19:10,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:19:10,931 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 20:19:10,931 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 267 transitions, 1767 flow. Second operand has 4 states, 4 states have (on average 124.5) internal successors, (498), 4 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:10,931 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:19:10,932 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 20:19:10,932 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:19:14,516 INFO L129 PetriNetUnfolder]: 64/4361 cut-off events. [2021-10-15 20:19:14,516 INFO L130 PetriNetUnfolder]: For 2359/2359 co-relation queries the response was YES. [2021-10-15 20:19:14,523 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9318 conditions, 4361 events. 64/4361 cut-off events. For 2359/2359 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6954 event pairs, 0 based on Foata normal form. 15/4376 useless extension candidates. Maximal degree in co-relation 8427. Up to 2484 conditions per place. [2021-10-15 20:19:14,525 INFO L132 encePairwiseOnDemand]: 408/422 looper letters, 0 selfloop transitions, 0 changer transitions 598/598 dead transitions. [2021-10-15 20:19:14,525 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 598 transitions, 3351 flow [2021-10-15 20:19:14,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:19:14,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:19:14,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 596 transitions. [2021-10-15 20:19:14,526 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.35308056872037913 [2021-10-15 20:19:14,527 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 596 transitions. [2021-10-15 20:19:14,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 596 transitions. [2021-10-15 20:19:14,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:19:14,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 596 transitions. [2021-10-15 20:19:14,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:14,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:14,530 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:14,530 INFO L186 Difference]: Start difference. First operand has 244 places, 267 transitions, 1767 flow. Second operand 4 states and 596 transitions. [2021-10-15 20:19:14,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 598 transitions, 3351 flow [2021-10-15 20:19:14,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 598 transitions, 3231 flow, removed 30 selfloop flow, removed 8 redundant places. [2021-10-15 20:19:14,543 INFO L242 Difference]: Finished difference. Result has 234 places, 0 transitions, 0 flow [2021-10-15 20:19:14,544 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1347, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=234, PETRI_TRANSITIONS=0} [2021-10-15 20:19:14,544 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -8 predicate places. [2021-10-15 20:19:14,544 INFO L470 AbstractCegarLoop]: Abstraction has has 234 places, 0 transitions, 0 flow [2021-10-15 20:19:14,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 124.5) internal successors, (498), 4 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:19:14,546 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:19:14,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-10-15 20:19:14,552 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:19:14,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:19:14 BoogieIcfgContainer [2021-10-15 20:19:14,558 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:19:14,558 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:19:14,558 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:19:14,559 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:19:14,559 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:14:41" (3/4) ... [2021-10-15 20:19:14,563 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 20:19:14,591 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-15 20:19:14,593 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 20:19:14,595 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:19:14,597 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:19:14,743 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 20:19:14,744 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:19:14,745 INFO L168 Benchmark]: Toolchain (without parser) took 276413.65 ms. Allocated memory was 88.1 MB in the beginning and 6.0 GB in the end (delta: 5.9 GB). Free memory was 49.4 MB in the beginning and 5.1 GB in the end (delta: -5.0 GB). Peak memory consumption was 895.9 MB. Max. memory is 16.1 GB. [2021-10-15 20:19:14,746 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 88.1 MB. Free memory is still 67.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:19:14,746 INFO L168 Benchmark]: CACSL2BoogieTranslator took 869.86 ms. Allocated memory was 88.1 MB in the beginning and 115.3 MB in the end (delta: 27.3 MB). Free memory was 49.2 MB in the beginning and 69.8 MB in the end (delta: -20.6 MB). Peak memory consumption was 6.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:19:14,747 INFO L168 Benchmark]: Boogie Procedure Inliner took 123.11 ms. Allocated memory is still 115.3 MB. Free memory was 69.8 MB in the beginning and 60.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:19:14,747 INFO L168 Benchmark]: Boogie Preprocessor took 91.16 ms. Allocated memory is still 115.3 MB. Free memory was 60.3 MB in the beginning and 54.4 MB in the end (delta: 5.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 20:19:14,748 INFO L168 Benchmark]: RCFGBuilder took 1780.88 ms. Allocated memory is still 115.3 MB. Free memory was 54.4 MB in the beginning and 64.6 MB in the end (delta: -10.3 MB). Peak memory consumption was 23.3 MB. Max. memory is 16.1 GB. [2021-10-15 20:19:14,748 INFO L168 Benchmark]: TraceAbstraction took 273354.01 ms. Allocated memory was 115.3 MB in the beginning and 6.0 GB in the end (delta: 5.9 GB). Free memory was 64.0 MB in the beginning and 5.1 GB in the end (delta: -5.0 GB). Peak memory consumption was 864.0 MB. Max. memory is 16.1 GB. [2021-10-15 20:19:14,749 INFO L168 Benchmark]: Witness Printer took 185.58 ms. Allocated memory is still 6.0 GB. Free memory was 5.1 GB in the beginning and 5.1 GB in the end (delta: 18.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-15 20:19:14,751 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 88.1 MB. Free memory is still 67.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 869.86 ms. Allocated memory was 88.1 MB in the beginning and 115.3 MB in the end (delta: 27.3 MB). Free memory was 49.2 MB in the beginning and 69.8 MB in the end (delta: -20.6 MB). Peak memory consumption was 6.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 123.11 ms. Allocated memory is still 115.3 MB. Free memory was 69.8 MB in the beginning and 60.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 91.16 ms. Allocated memory is still 115.3 MB. Free memory was 60.3 MB in the beginning and 54.4 MB in the end (delta: 5.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1780.88 ms. Allocated memory is still 115.3 MB. Free memory was 54.4 MB in the beginning and 64.6 MB in the end (delta: -10.3 MB). Peak memory consumption was 23.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 273354.01 ms. Allocated memory was 115.3 MB in the beginning and 6.0 GB in the end (delta: 5.9 GB). Free memory was 64.0 MB in the beginning and 5.1 GB in the end (delta: -5.0 GB). Peak memory consumption was 864.0 MB. Max. memory is 16.1 GB. * Witness Printer took 185.58 ms. Allocated memory is still 6.0 GB. Free memory was 5.1 GB in the beginning and 5.1 GB in the end (delta: 18.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 149]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 245 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 15.1ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 273253.6ms, OverallIterations: 27, TraceHistogramMax: 16, EmptinessCheckTime: 0.0ms, AutomataDifference: 199709.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 164.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2629 SDtfs, 4157 SDslu, 20 SDs, 0 SdLazy, 23307 SolverSat, 1870 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 21274.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10516 GetRequests, 10424 SyntacticMatches, 5 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 566.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=15843occurred in iteration=19, InterpolantAutomatonStates: 111, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1156.0ms SsaConstructionTime, 4349.5ms SatisfiabilityAnalysisTime, 48183.2ms InterpolantComputationTime, 30788 NumberOfCodeBlocks, 30788 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 30749 ConstructedInterpolants, 43 QuantifiedInterpolants, 90611 SizeOfPredicates, 4 NumberOfNonLiveVariables, 13143 ConjunctsInSsa, 57 ConjunctsInUnsatCore, 39 InterpolantComputations, 23 PerfectInterpolantSequences, 99525/103427 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 20:19:14,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1a128d8-30e1-4275-a47d-cdf29bd59279/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...