./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem10_label59.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_12d41a73-e5a1-4bb1-95a2-5cf846b4dca5/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d41a73-e5a1-4bb1-95a2-5cf846b4dca5/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_12d41a73-e5a1-4bb1-95a2-5cf846b4dca5/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d41a73-e5a1-4bb1-95a2-5cf846b4dca5/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem10_label59.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d41a73-e5a1-4bb1-95a2-5cf846b4dca5/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_12d41a73-e5a1-4bb1-95a2-5cf846b4dca5/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 850c3bde305dfd744382c917dcb915ac40b9650f ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 19:34:02,965 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:34:02,969 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:34:03,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:34:03,034 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:34:03,038 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:34:03,040 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:34:03,045 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:34:03,048 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:34:03,054 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:34:03,055 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:34:03,057 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:34:03,058 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:34:03,060 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:34:03,062 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:34:03,064 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:34:03,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:34:03,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:34:03,068 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:34:03,070 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:34:03,072 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:34:03,074 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:34:03,075 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:34:03,076 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:34:03,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:34:03,080 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:34:03,081 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:34:03,082 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:34:03,082 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:34:03,084 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:34:03,084 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:34:03,085 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:34:03,086 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:34:03,087 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:34:03,090 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:34:03,091 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:34:03,092 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:34:03,093 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:34:03,093 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:34:03,094 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:34:03,095 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:34:03,096 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d41a73-e5a1-4bb1-95a2-5cf846b4dca5/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:34:03,139 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:34:03,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:34:03,140 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:34:03,141 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:34:03,148 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:34:03,148 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:34:03,148 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:34:03,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:34:03,149 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:34:03,149 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:34:03,150 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:34:03,151 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:34:03,151 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:34:03,151 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:34:03,151 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:34:03,152 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:34:03,152 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:34:03,152 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:34:03,152 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:34:03,153 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:34:03,153 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:34:03,153 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:34:03,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:34:03,154 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:34:03,154 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:34:03,154 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:34:03,155 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:34:03,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:34:03,155 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:34:03,157 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:34:03,157 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:34:03,157 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:34:03,157 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_12d41a73-e5a1-4bb1-95a2-5cf846b4dca5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d41a73-e5a1-4bb1-95a2-5cf846b4dca5/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 850c3bde305dfd744382c917dcb915ac40b9650f [2021-10-15 19:34:03,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:34:03,476 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:34:03,480 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:34:03,481 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:34:03,482 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:34:03,483 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d41a73-e5a1-4bb1-95a2-5cf846b4dca5/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/eca-rers2012/Problem10_label59.c [2021-10-15 19:34:03,564 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d41a73-e5a1-4bb1-95a2-5cf846b4dca5/bin/uautomizer-hJ6jxDFKc3/data/ee9c7f7c9/85d1dedd792e4308a6672ebc37890153/FLAG7888ec528 [2021-10-15 19:34:04,232 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:34:04,242 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d41a73-e5a1-4bb1-95a2-5cf846b4dca5/sv-benchmarks/c/eca-rers2012/Problem10_label59.c [2021-10-15 19:34:04,259 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d41a73-e5a1-4bb1-95a2-5cf846b4dca5/bin/uautomizer-hJ6jxDFKc3/data/ee9c7f7c9/85d1dedd792e4308a6672ebc37890153/FLAG7888ec528 [2021-10-15 19:34:04,486 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d41a73-e5a1-4bb1-95a2-5cf846b4dca5/bin/uautomizer-hJ6jxDFKc3/data/ee9c7f7c9/85d1dedd792e4308a6672ebc37890153 [2021-10-15 19:34:04,489 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:34:04,491 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:34:04,493 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:34:04,493 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:34:04,498 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:34:04,499 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:34:04" (1/1) ... [2021-10-15 19:34:04,502 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3186105d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:04, skipping insertion in model container [2021-10-15 19:34:04,502 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:34:04" (1/1) ... [2021-10-15 19:34:04,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:34:04,571 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:34:04,906 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_12d41a73-e5a1-4bb1-95a2-5cf846b4dca5/sv-benchmarks/c/eca-rers2012/Problem10_label59.c[7385,7398] [2021-10-15 19:34:05,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:34:05,075 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:34:05,126 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_12d41a73-e5a1-4bb1-95a2-5cf846b4dca5/sv-benchmarks/c/eca-rers2012/Problem10_label59.c[7385,7398] [2021-10-15 19:34:05,220 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:34:05,233 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:34:05,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:05 WrapperNode [2021-10-15 19:34:05,234 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:34:05,235 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:34:05,235 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:34:05,235 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:34:05,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:05" (1/1) ... [2021-10-15 19:34:05,262 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:05" (1/1) ... [2021-10-15 19:34:05,357 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:34:05,358 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:34:05,358 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:34:05,358 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:34:05,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:05" (1/1) ... [2021-10-15 19:34:05,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:05" (1/1) ... [2021-10-15 19:34:05,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:05" (1/1) ... [2021-10-15 19:34:05,388 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:05" (1/1) ... [2021-10-15 19:34:05,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:05" (1/1) ... [2021-10-15 19:34:05,456 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:05" (1/1) ... [2021-10-15 19:34:05,474 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:05" (1/1) ... [2021-10-15 19:34:05,480 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:34:05,481 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:34:05,481 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:34:05,481 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:34:05,482 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:05" (1/1) ... [2021-10-15 19:34:05,490 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:34:05,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d41a73-e5a1-4bb1-95a2-5cf846b4dca5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:05,535 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d41a73-e5a1-4bb1-95a2-5cf846b4dca5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:34:05,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d41a73-e5a1-4bb1-95a2-5cf846b4dca5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:34:05,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:34:05,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:34:05,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:34:05,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:34:06,827 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:34:06,827 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 19:34:06,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:34:06 BoogieIcfgContainer [2021-10-15 19:34:06,830 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:34:06,833 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:34:06,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:34:06,837 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:34:06,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:34:04" (1/3) ... [2021-10-15 19:34:06,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752afbbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:34:06, skipping insertion in model container [2021-10-15 19:34:06,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:05" (2/3) ... [2021-10-15 19:34:06,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752afbbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:34:06, skipping insertion in model container [2021-10-15 19:34:06,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:34:06" (3/3) ... [2021-10-15 19:34:06,841 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem10_label59.c [2021-10-15 19:34:06,847 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:34:06,847 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:34:06,907 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:34:06,915 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 19:34:06,915 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:34:06,939 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 206 places, 344 transitions, 688 flow [2021-10-15 19:34:07,016 INFO L129 PetriNetUnfolder]: 139/344 cut-off events. [2021-10-15 19:34:07,016 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:34:07,018 INFO L84 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 344 events. 139/344 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 212 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 0. Up to 76 conditions per place. [2021-10-15 19:34:07,018 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 344 transitions, 688 flow [2021-10-15 19:34:07,029 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 339 transitions, 678 flow [2021-10-15 19:34:07,060 INFO L129 PetriNetUnfolder]: 60/185 cut-off events. [2021-10-15 19:34:07,060 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:34:07,060 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:07,061 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:34:07,061 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:34:07,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:07,067 INFO L82 PathProgramCache]: Analyzing trace with hash 962891993, now seen corresponding path program 1 times [2021-10-15 19:34:07,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:07,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338477301] [2021-10-15 19:34:07,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:07,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:07,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:07,493 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 19:34:07,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:07,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338477301] [2021-10-15 19:34:07,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338477301] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:34:07,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:34:07,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:34:07,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262529051] [2021-10-15 19:34:07,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:34:07,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:07,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:34:07,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:34:07,526 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 19:34:07,529 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 339 transitions, 678 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 19:34:07,530 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:07,530 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 19:34:07,531 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:08,610 INFO L129 PetriNetUnfolder]: 181/537 cut-off events. [2021-10-15 19:34:08,611 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:34:08,612 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1068 conditions, 537 events. 181/537 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 546 event pairs, 0 based on Foata normal form. 76/357 useless extension candidates. Maximal degree in co-relation 1. Up to 290 conditions per place. [2021-10-15 19:34:08,618 INFO L132 encePairwiseOnDemand]: 163/344 looper letters, 350 selfloop transitions, 74 changer transitions 105/534 dead transitions. [2021-10-15 19:34:08,618 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 534 transitions, 2126 flow [2021-10-15 19:34:08,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:34:08,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:34:08,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 645 transitions. [2021-10-15 19:34:08,635 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.625 [2021-10-15 19:34:08,636 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 645 transitions. [2021-10-15 19:34:08,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 645 transitions. [2021-10-15 19:34:08,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:08,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 645 transitions. [2021-10-15 19:34:08,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 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 19:34:08,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 19:34:08,657 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 19:34:08,659 INFO L186 Difference]: Start difference. First operand has 203 places, 339 transitions, 678 flow. Second operand 3 states and 645 transitions. [2021-10-15 19:34:08,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 534 transitions, 2126 flow [2021-10-15 19:34:08,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 534 transitions, 2126 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:34:08,680 INFO L242 Difference]: Finished difference. Result has 207 places, 291 transitions, 1026 flow [2021-10-15 19:34:08,682 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1026, PETRI_PLACES=207, PETRI_TRANSITIONS=291} [2021-10-15 19:34:08,683 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, 4 predicate places. [2021-10-15 19:34:08,684 INFO L470 AbstractCegarLoop]: Abstraction has has 207 places, 291 transitions, 1026 flow [2021-10-15 19:34:08,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 19:34:08,685 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:08,685 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, 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] [2021-10-15 19:34:08,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:34:08,686 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:34:08,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:08,687 INFO L82 PathProgramCache]: Analyzing trace with hash -2138327860, now seen corresponding path program 1 times [2021-10-15 19:34:08,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:08,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728353098] [2021-10-15 19:34:08,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:08,688 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:08,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:08,828 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:34:08,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:08,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728353098] [2021-10-15 19:34:08,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728353098] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:34:08,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:34:08,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:34:08,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115932377] [2021-10-15 19:34:08,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:34:08,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:08,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:34:08,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:34:08,836 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 19:34:08,836 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 291 transitions, 1026 flow. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 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 19:34:08,837 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:08,837 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 19:34:08,837 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:09,630 INFO L129 PetriNetUnfolder]: 171/730 cut-off events. [2021-10-15 19:34:09,631 INFO L130 PetriNetUnfolder]: For 146/146 co-relation queries the response was YES. [2021-10-15 19:34:09,633 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1699 conditions, 730 events. 171/730 cut-off events. For 146/146 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1281 event pairs, 0 based on Foata normal form. 129/853 useless extension candidates. Maximal degree in co-relation 686. Up to 395 conditions per place. [2021-10-15 19:34:09,639 INFO L132 encePairwiseOnDemand]: 268/344 looper letters, 396 selfloop transitions, 45 changer transitions 0/446 dead transitions. [2021-10-15 19:34:09,639 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 446 transitions, 2272 flow [2021-10-15 19:34:09,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:34:09,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:34:09,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 449 transitions. [2021-10-15 19:34:09,643 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43507751937984496 [2021-10-15 19:34:09,643 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 449 transitions. [2021-10-15 19:34:09,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 449 transitions. [2021-10-15 19:34:09,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:09,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 449 transitions. [2021-10-15 19:34:09,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 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 19:34:09,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 19:34:09,657 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 19:34:09,657 INFO L186 Difference]: Start difference. First operand has 207 places, 291 transitions, 1026 flow. Second operand 3 states and 449 transitions. [2021-10-15 19:34:09,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 446 transitions, 2272 flow [2021-10-15 19:34:09,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 446 transitions, 2106 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:34:09,694 INFO L242 Difference]: Finished difference. Result has 149 places, 310 transitions, 1378 flow [2021-10-15 19:34:09,695 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=878, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1378, PETRI_PLACES=149, PETRI_TRANSITIONS=310} [2021-10-15 19:34:09,706 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -54 predicate places. [2021-10-15 19:34:09,706 INFO L470 AbstractCegarLoop]: Abstraction has has 149 places, 310 transitions, 1378 flow [2021-10-15 19:34:09,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 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 19:34:09,707 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:09,708 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, 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] [2021-10-15 19:34:09,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:34:09,708 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:34:09,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:09,709 INFO L82 PathProgramCache]: Analyzing trace with hash -675083717, now seen corresponding path program 1 times [2021-10-15 19:34:09,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:09,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826990153] [2021-10-15 19:34:09,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:09,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:09,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:09,913 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:34:09,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:09,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826990153] [2021-10-15 19:34:09,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826990153] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:34:09,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:34:09,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:34:09,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104501808] [2021-10-15 19:34:09,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:34:09,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:09,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:34:09,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:34:09,923 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 19:34:09,923 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 310 transitions, 1378 flow. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 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 19:34:09,923 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:09,924 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 19:34:09,924 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:10,800 INFO L129 PetriNetUnfolder]: 206/904 cut-off events. [2021-10-15 19:34:10,800 INFO L130 PetriNetUnfolder]: For 366/366 co-relation queries the response was YES. [2021-10-15 19:34:10,801 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2257 conditions, 904 events. 206/904 cut-off events. For 366/366 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2133 event pairs, 0 based on Foata normal form. 40/944 useless extension candidates. Maximal degree in co-relation 1381. Up to 750 conditions per place. [2021-10-15 19:34:10,807 INFO L132 encePairwiseOnDemand]: 269/344 looper letters, 441 selfloop transitions, 35 changer transitions 0/481 dead transitions. [2021-10-15 19:34:10,808 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 481 transitions, 2828 flow [2021-10-15 19:34:10,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:34:10,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:34:10,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 448 transitions. [2021-10-15 19:34:10,812 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2021-10-15 19:34:10,812 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 448 transitions. [2021-10-15 19:34:10,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 448 transitions. [2021-10-15 19:34:10,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:10,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 448 transitions. [2021-10-15 19:34:10,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 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 19:34:10,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 19:34:10,818 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 19:34:10,819 INFO L186 Difference]: Start difference. First operand has 149 places, 310 transitions, 1378 flow. Second operand 3 states and 448 transitions. [2021-10-15 19:34:10,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 481 transitions, 2828 flow [2021-10-15 19:34:10,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 481 transitions, 2720 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:34:10,849 INFO L242 Difference]: Finished difference. Result has 150 places, 344 transitions, 1745 flow [2021-10-15 19:34:10,850 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=1288, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1745, PETRI_PLACES=150, PETRI_TRANSITIONS=344} [2021-10-15 19:34:10,850 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -53 predicate places. [2021-10-15 19:34:10,851 INFO L470 AbstractCegarLoop]: Abstraction has has 150 places, 344 transitions, 1745 flow [2021-10-15 19:34:10,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 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 19:34:10,851 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:10,852 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, 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] [2021-10-15 19:34:10,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:34:10,852 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:34:10,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:10,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1097584517, now seen corresponding path program 1 times [2021-10-15 19:34:10,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:10,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395312009] [2021-10-15 19:34:10,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:10,854 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:10,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:10,974 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:34:10,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:10,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395312009] [2021-10-15 19:34:10,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395312009] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:34:10,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:34:10,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:34:10,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599190088] [2021-10-15 19:34:10,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:34:10,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:10,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:34:10,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:34:10,985 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 19:34:10,985 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 344 transitions, 1745 flow. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 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 19:34:10,985 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:10,986 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 19:34:10,986 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:11,875 INFO L129 PetriNetUnfolder]: 222/1198 cut-off events. [2021-10-15 19:34:11,875 INFO L130 PetriNetUnfolder]: For 710/710 co-relation queries the response was YES. [2021-10-15 19:34:11,877 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2934 conditions, 1198 events. 222/1198 cut-off events. For 710/710 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3097 event pairs, 0 based on Foata normal form. 135/1333 useless extension candidates. Maximal degree in co-relation 1539. Up to 715 conditions per place. [2021-10-15 19:34:11,885 INFO L132 encePairwiseOnDemand]: 267/344 looper letters, 420 selfloop transitions, 72 changer transitions 0/497 dead transitions. [2021-10-15 19:34:11,886 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 497 transitions, 3071 flow [2021-10-15 19:34:11,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:34:11,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:34:11,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 449 transitions. [2021-10-15 19:34:11,889 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43507751937984496 [2021-10-15 19:34:11,890 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 449 transitions. [2021-10-15 19:34:11,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 449 transitions. [2021-10-15 19:34:11,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:11,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 449 transitions. [2021-10-15 19:34:11,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 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 19:34:11,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 19:34:11,899 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 19:34:11,900 INFO L186 Difference]: Start difference. First operand has 150 places, 344 transitions, 1745 flow. Second operand 3 states and 449 transitions. [2021-10-15 19:34:11,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 497 transitions, 3071 flow [2021-10-15 19:34:11,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 497 transitions, 3030 flow, removed 15 selfloop flow, removed 1 redundant places. [2021-10-15 19:34:11,936 INFO L242 Difference]: Finished difference. Result has 153 places, 361 transitions, 2326 flow [2021-10-15 19:34:11,937 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=1488, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2326, PETRI_PLACES=153, PETRI_TRANSITIONS=361} [2021-10-15 19:34:11,937 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -50 predicate places. [2021-10-15 19:34:11,938 INFO L470 AbstractCegarLoop]: Abstraction has has 153 places, 361 transitions, 2326 flow [2021-10-15 19:34:11,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 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 19:34:11,938 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:11,939 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, 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] [2021-10-15 19:34:11,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:34:11,939 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:34:11,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:11,940 INFO L82 PathProgramCache]: Analyzing trace with hash -466379074, now seen corresponding path program 1 times [2021-10-15 19:34:11,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:11,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471211790] [2021-10-15 19:34:11,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:11,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:11,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:12,147 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:34:12,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:12,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471211790] [2021-10-15 19:34:12,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471211790] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:34:12,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:34:12,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:34:12,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771493907] [2021-10-15 19:34:12,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:34:12,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:12,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:34:12,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:34:12,152 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 344 [2021-10-15 19:34:12,153 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 361 transitions, 2326 flow. Second operand has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 0 states have call successors, (0), 0 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 19:34:12,153 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:12,153 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 344 [2021-10-15 19:34:12,153 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:13,095 INFO L129 PetriNetUnfolder]: 217/1213 cut-off events. [2021-10-15 19:34:13,095 INFO L130 PetriNetUnfolder]: For 1138/1138 co-relation queries the response was YES. [2021-10-15 19:34:13,097 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3203 conditions, 1213 events. 217/1213 cut-off events. For 1138/1138 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3166 event pairs, 0 based on Foata normal form. 5/1218 useless extension candidates. Maximal degree in co-relation 1532. Up to 874 conditions per place. [2021-10-15 19:34:13,104 INFO L132 encePairwiseOnDemand]: 279/344 looper letters, 315 selfloop transitions, 176 changer transitions 0/495 dead transitions. [2021-10-15 19:34:13,104 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 495 transitions, 3552 flow [2021-10-15 19:34:13,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:34:13,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:34:13,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 398 transitions. [2021-10-15 19:34:13,108 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2313953488372093 [2021-10-15 19:34:13,108 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 398 transitions. [2021-10-15 19:34:13,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 398 transitions. [2021-10-15 19:34:13,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:13,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 398 transitions. [2021-10-15 19:34:13,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 79.6) internal successors, (398), 5 states have internal predecessors, (398), 0 states have call successors, (0), 0 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 19:34:13,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 344.0) internal successors, (2064), 6 states have internal predecessors, (2064), 0 states have call successors, (0), 0 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 19:34:13,116 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 344.0) internal successors, (2064), 6 states have internal predecessors, (2064), 0 states have call successors, (0), 0 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 19:34:13,116 INFO L186 Difference]: Start difference. First operand has 153 places, 361 transitions, 2326 flow. Second operand 5 states and 398 transitions. [2021-10-15 19:34:13,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 495 transitions, 3552 flow [2021-10-15 19:34:13,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 495 transitions, 3206 flow, removed 103 selfloop flow, removed 2 redundant places. [2021-10-15 19:34:13,150 INFO L242 Difference]: Finished difference. Result has 158 places, 359 transitions, 2492 flow [2021-10-15 19:34:13,151 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=1946, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2492, PETRI_PLACES=158, PETRI_TRANSITIONS=359} [2021-10-15 19:34:13,151 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -45 predicate places. [2021-10-15 19:34:13,152 INFO L470 AbstractCegarLoop]: Abstraction has has 158 places, 359 transitions, 2492 flow [2021-10-15 19:34:13,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 0 states have call successors, (0), 0 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 19:34:13,152 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:13,153 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:34:13,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 19:34:13,154 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:34:13,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:13,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1250921452, now seen corresponding path program 1 times [2021-10-15 19:34:13,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:13,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417797736] [2021-10-15 19:34:13,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:13,155 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:13,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:13,396 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-15 19:34:13,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:13,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417797736] [2021-10-15 19:34:13,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417797736] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:34:13,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:34:13,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 19:34:13,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013644718] [2021-10-15 19:34:13,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:34:13,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:13,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:34:13,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:34:13,400 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 19:34:13,400 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 359 transitions, 2492 flow. Second operand has 7 states, 7 states have (on average 36.0) internal successors, (252), 7 states have internal predecessors, (252), 0 states have call successors, (0), 0 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 19:34:13,400 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:13,400 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 19:34:13,400 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:14,480 INFO L129 PetriNetUnfolder]: 216/1267 cut-off events. [2021-10-15 19:34:14,480 INFO L130 PetriNetUnfolder]: For 1764/1764 co-relation queries the response was YES. [2021-10-15 19:34:14,482 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3338 conditions, 1267 events. 216/1267 cut-off events. For 1764/1764 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3261 event pairs, 0 based on Foata normal form. 1/1268 useless extension candidates. Maximal degree in co-relation 1447. Up to 1165 conditions per place. [2021-10-15 19:34:14,490 INFO L132 encePairwiseOnDemand]: 338/344 looper letters, 346 selfloop transitions, 1 changer transitions 56/410 dead transitions. [2021-10-15 19:34:14,490 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 410 transitions, 3400 flow [2021-10-15 19:34:14,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:34:14,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:34:14,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 321 transitions. [2021-10-15 19:34:14,494 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.13330564784053156 [2021-10-15 19:34:14,494 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 321 transitions. [2021-10-15 19:34:14,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 321 transitions. [2021-10-15 19:34:14,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:14,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 321 transitions. [2021-10-15 19:34:14,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 45.857142857142854) internal successors, (321), 7 states have internal predecessors, (321), 0 states have call successors, (0), 0 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 19:34:14,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 344.0) internal successors, (2752), 8 states have internal predecessors, (2752), 0 states have call successors, (0), 0 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 19:34:14,502 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 344.0) internal successors, (2752), 8 states have internal predecessors, (2752), 0 states have call successors, (0), 0 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 19:34:14,503 INFO L186 Difference]: Start difference. First operand has 158 places, 359 transitions, 2492 flow. Second operand 7 states and 321 transitions. [2021-10-15 19:34:14,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 410 transitions, 3400 flow [2021-10-15 19:34:14,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 410 transitions, 3394 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:34:14,541 INFO L242 Difference]: Finished difference. Result has 167 places, 354 transitions, 2445 flow [2021-10-15 19:34:14,542 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=2486, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2445, PETRI_PLACES=167, PETRI_TRANSITIONS=354} [2021-10-15 19:34:14,542 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -36 predicate places. [2021-10-15 19:34:14,542 INFO L470 AbstractCegarLoop]: Abstraction has has 167 places, 354 transitions, 2445 flow [2021-10-15 19:34:14,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 36.0) internal successors, (252), 7 states have internal predecessors, (252), 0 states have call successors, (0), 0 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 19:34:14,543 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:14,543 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-15 19:34:14,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 19:34:14,544 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:34:14,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:14,545 INFO L82 PathProgramCache]: Analyzing trace with hash -354141657, now seen corresponding path program 1 times [2021-10-15 19:34:14,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:14,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091284576] [2021-10-15 19:34:14,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:14,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:14,715 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 125 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:34:14,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:14,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091284576] [2021-10-15 19:34:14,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091284576] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:34:14,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351183831] [2021-10-15 19:34:14,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:14,717 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:14,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d41a73-e5a1-4bb1-95a2-5cf846b4dca5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:14,721 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d41a73-e5a1-4bb1-95a2-5cf846b4dca5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:34:14,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d41a73-e5a1-4bb1-95a2-5cf846b4dca5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:34:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:14,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-15 19:34:14,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:34:15,804 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 127 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:34:15,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351183831] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:34:15,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:34:15,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-15 19:34:15,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697930696] [2021-10-15 19:34:15,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:34:15,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:15,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:34:15,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:34:15,809 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 19:34:15,810 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 354 transitions, 2445 flow. Second operand has 7 states, 7 states have (on average 66.0) internal successors, (462), 7 states have internal predecessors, (462), 0 states have call successors, (0), 0 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 19:34:15,810 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:15,810 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 19:34:15,810 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:19,679 INFO L129 PetriNetUnfolder]: 575/3271 cut-off events. [2021-10-15 19:34:19,679 INFO L130 PetriNetUnfolder]: For 6162/6162 co-relation queries the response was YES. [2021-10-15 19:34:19,688 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8738 conditions, 3271 events. 575/3271 cut-off events. For 6162/6162 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 14208 event pairs, 0 based on Foata normal form. 182/3453 useless extension candidates. Maximal degree in co-relation 8717. Up to 697 conditions per place. [2021-10-15 19:34:19,710 INFO L132 encePairwiseOnDemand]: 268/344 looper letters, 1318 selfloop transitions, 484 changer transitions 0/1809 dead transitions. [2021-10-15 19:34:19,710 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 1809 transitions, 12021 flow [2021-10-15 19:34:19,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 19:34:19,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 19:34:19,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1922 transitions. [2021-10-15 19:34:19,721 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5587209302325581 [2021-10-15 19:34:19,721 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1922 transitions. [2021-10-15 19:34:19,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1922 transitions. [2021-10-15 19:34:19,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:19,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1922 transitions. [2021-10-15 19:34:19,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 192.2) internal successors, (1922), 10 states have internal predecessors, (1922), 0 states have call successors, (0), 0 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 19:34:19,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 344.0) internal successors, (3784), 11 states have internal predecessors, (3784), 0 states have call successors, (0), 0 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 19:34:19,741 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 344.0) internal successors, (3784), 11 states have internal predecessors, (3784), 0 states have call successors, (0), 0 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 19:34:19,741 INFO L186 Difference]: Start difference. First operand has 167 places, 354 transitions, 2445 flow. Second operand 10 states and 1922 transitions. [2021-10-15 19:34:19,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 1809 transitions, 12021 flow [2021-10-15 19:34:19,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 1809 transitions, 11948 flow, removed 36 selfloop flow, removed 5 redundant places. [2021-10-15 19:34:19,835 INFO L242 Difference]: Finished difference. Result has 176 places, 713 transitions, 8271 flow [2021-10-15 19:34:19,835 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=2436, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8271, PETRI_PLACES=176, PETRI_TRANSITIONS=713} [2021-10-15 19:34:19,836 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -27 predicate places. [2021-10-15 19:34:19,836 INFO L470 AbstractCegarLoop]: Abstraction has has 176 places, 713 transitions, 8271 flow [2021-10-15 19:34:19,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.0) internal successors, (462), 7 states have internal predecessors, (462), 0 states have call successors, (0), 0 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 19:34:19,837 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:19,837 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:34:19,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d41a73-e5a1-4bb1-95a2-5cf846b4dca5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:34:20,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d41a73-e5a1-4bb1-95a2-5cf846b4dca5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-15 19:34:20,058 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:34:20,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:20,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1618209210, now seen corresponding path program 1 times [2021-10-15 19:34:20,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:20,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096397316] [2021-10-15 19:34:20,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:20,059 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:20,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:20,201 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-15 19:34:20,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:20,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096397316] [2021-10-15 19:34:20,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096397316] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:34:20,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:34:20,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:34:20,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892057040] [2021-10-15 19:34:20,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:34:20,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:20,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:34:20,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:34:20,206 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 19:34:20,206 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 713 transitions, 8271 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 19:34:20,207 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:20,207 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 19:34:20,207 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:22,848 INFO L129 PetriNetUnfolder]: 595/3717 cut-off events. [2021-10-15 19:34:22,849 INFO L130 PetriNetUnfolder]: For 14389/14389 co-relation queries the response was YES. [2021-10-15 19:34:22,858 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10786 conditions, 3717 events. 595/3717 cut-off events. For 14389/14389 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 17596 event pairs, 0 based on Foata normal form. 204/3921 useless extension candidates. Maximal degree in co-relation 10759. Up to 2994 conditions per place. [2021-10-15 19:34:22,882 INFO L132 encePairwiseOnDemand]: 269/344 looper letters, 779 selfloop transitions, 85 changer transitions 0/871 dead transitions. [2021-10-15 19:34:22,882 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 871 transitions, 10593 flow [2021-10-15 19:34:22,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:34:22,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:34:22,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 447 transitions. [2021-10-15 19:34:22,887 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2021-10-15 19:34:22,887 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 447 transitions. [2021-10-15 19:34:22,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 447 transitions. [2021-10-15 19:34:22,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:22,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 447 transitions. [2021-10-15 19:34:22,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 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 19:34:22,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 19:34:22,893 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 19:34:22,893 INFO L186 Difference]: Start difference. First operand has 176 places, 713 transitions, 8271 flow. Second operand 3 states and 447 transitions. [2021-10-15 19:34:22,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 871 transitions, 10593 flow [2021-10-15 19:34:22,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 871 transitions, 10513 flow, removed 40 selfloop flow, removed 0 redundant places. [2021-10-15 19:34:23,002 INFO L242 Difference]: Finished difference. Result has 180 places, 735 transitions, 9275 flow [2021-10-15 19:34:23,003 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=7861, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=9275, PETRI_PLACES=180, PETRI_TRANSITIONS=735} [2021-10-15 19:34:23,003 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -23 predicate places. [2021-10-15 19:34:23,004 INFO L470 AbstractCegarLoop]: Abstraction has has 180 places, 735 transitions, 9275 flow [2021-10-15 19:34:23,004 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 19:34:23,004 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:23,004 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:34:23,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 19:34:23,005 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:34:23,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:23,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1299344947, now seen corresponding path program 1 times [2021-10-15 19:34:23,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:23,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904296753] [2021-10-15 19:34:23,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:23,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:23,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:23,221 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 63 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:34:23,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:23,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904296753] [2021-10-15 19:34:23,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904296753] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:34:23,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884509722] [2021-10-15 19:34:23,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:23,222 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:23,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d41a73-e5a1-4bb1-95a2-5cf846b4dca5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:23,223 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d41a73-e5a1-4bb1-95a2-5cf846b4dca5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:34:23,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d41a73-e5a1-4bb1-95a2-5cf846b4dca5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:34:23,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:23,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:34:23,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:34:24,256 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-10-15 19:34:24,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884509722] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:34:24,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:34:24,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-10-15 19:34:24,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102863427] [2021-10-15 19:34:24,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:34:24,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:24,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:34:24,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:34:24,260 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 19:34:24,261 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 735 transitions, 9275 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 19:34:24,261 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:24,261 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 19:34:24,261 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:26,547 INFO L129 PetriNetUnfolder]: 416/3538 cut-off events. [2021-10-15 19:34:26,548 INFO L130 PetriNetUnfolder]: For 12953/12953 co-relation queries the response was YES. [2021-10-15 19:34:26,556 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9557 conditions, 3538 events. 416/3538 cut-off events. For 12953/12953 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 17427 event pairs, 0 based on Foata normal form. 179/3717 useless extension candidates. Maximal degree in co-relation 9528. Up to 2941 conditions per place. [2021-10-15 19:34:26,584 INFO L132 encePairwiseOnDemand]: 273/344 looper letters, 608 selfloop transitions, 77 changer transitions 0/692 dead transitions. [2021-10-15 19:34:26,585 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 692 transitions, 7990 flow [2021-10-15 19:34:26,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:34:26,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:34:26,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 437 transitions. [2021-10-15 19:34:26,588 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.42344961240310075 [2021-10-15 19:34:26,588 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 437 transitions. [2021-10-15 19:34:26,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 437 transitions. [2021-10-15 19:34:26,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:26,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 437 transitions. [2021-10-15 19:34:26,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 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 19:34:26,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 19:34:26,595 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 19:34:26,595 INFO L186 Difference]: Start difference. First operand has 180 places, 735 transitions, 9275 flow. Second operand 3 states and 437 transitions. [2021-10-15 19:34:26,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 692 transitions, 7990 flow [2021-10-15 19:34:26,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 692 transitions, 7696 flow, removed 71 selfloop flow, removed 2 redundant places. [2021-10-15 19:34:26,667 INFO L242 Difference]: Finished difference. Result has 180 places, 556 transitions, 6206 flow [2021-10-15 19:34:26,668 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=6052, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=6206, PETRI_PLACES=180, PETRI_TRANSITIONS=556} [2021-10-15 19:34:26,669 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -23 predicate places. [2021-10-15 19:34:26,669 INFO L470 AbstractCegarLoop]: Abstraction has has 180 places, 556 transitions, 6206 flow [2021-10-15 19:34:26,669 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 19:34:26,669 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:26,672 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, 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, 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] [2021-10-15 19:34:26,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d41a73-e5a1-4bb1-95a2-5cf846b4dca5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:34:26,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d41a73-e5a1-4bb1-95a2-5cf846b4dca5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:26,874 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:34:26,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:26,874 INFO L82 PathProgramCache]: Analyzing trace with hash -883397783, now seen corresponding path program 1 times [2021-10-15 19:34:26,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:26,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204358552] [2021-10-15 19:34:26,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:26,875 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:26,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:27,040 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 125 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:34:27,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:27,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204358552] [2021-10-15 19:34:27,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204358552] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:34:27,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141747862] [2021-10-15 19:34:27,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:27,043 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:27,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d41a73-e5a1-4bb1-95a2-5cf846b4dca5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:27,046 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d41a73-e5a1-4bb1-95a2-5cf846b4dca5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:34:27,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d41a73-e5a1-4bb1-95a2-5cf846b4dca5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:34:27,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:27,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:34:27,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:34:28,145 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-10-15 19:34:28,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141747862] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:34:28,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:34:28,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-10-15 19:34:28,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841069894] [2021-10-15 19:34:28,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:34:28,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:28,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:34:28,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:34:28,151 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 19:34:28,151 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 556 transitions, 6206 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 19:34:28,151 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:28,152 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 19:34:28,152 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:30,416 INFO L129 PetriNetUnfolder]: 505/4337 cut-off events. [2021-10-15 19:34:30,416 INFO L130 PetriNetUnfolder]: For 11889/11889 co-relation queries the response was YES. [2021-10-15 19:34:30,423 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11594 conditions, 4337 events. 505/4337 cut-off events. For 11889/11889 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 23394 event pairs, 0 based on Foata normal form. 120/4457 useless extension candidates. Maximal degree in co-relation 11565. Up to 3303 conditions per place. [2021-10-15 19:34:30,431 INFO L132 encePairwiseOnDemand]: 288/344 looper letters, 572 selfloop transitions, 198 changer transitions 0/777 dead transitions. [2021-10-15 19:34:30,432 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 777 transitions, 9240 flow [2021-10-15 19:34:30,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:34:30,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:34:30,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 427 transitions. [2021-10-15 19:34:30,433 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.41375968992248063 [2021-10-15 19:34:30,434 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 427 transitions. [2021-10-15 19:34:30,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 427 transitions. [2021-10-15 19:34:30,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:30,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 427 transitions. [2021-10-15 19:34:30,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 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 19:34:30,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 19:34:30,439 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 19:34:30,439 INFO L186 Difference]: Start difference. First operand has 180 places, 556 transitions, 6206 flow. Second operand 3 states and 427 transitions. [2021-10-15 19:34:30,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 777 transitions, 9240 flow [2021-10-15 19:34:30,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 777 transitions, 9147 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:34:30,517 INFO L242 Difference]: Finished difference. Result has 183 places, 641 transitions, 8391 flow [2021-10-15 19:34:30,518 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=5770, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=8391, PETRI_PLACES=183, PETRI_TRANSITIONS=641} [2021-10-15 19:34:30,518 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -20 predicate places. [2021-10-15 19:34:30,519 INFO L470 AbstractCegarLoop]: Abstraction has has 183 places, 641 transitions, 8391 flow [2021-10-15 19:34:30,519 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 19:34:30,519 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:30,520 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:34:30,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d41a73-e5a1-4bb1-95a2-5cf846b4dca5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:34:30,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d41a73-e5a1-4bb1-95a2-5cf846b4dca5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:30,746 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:34:30,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:30,746 INFO L82 PathProgramCache]: Analyzing trace with hash -574209587, now seen corresponding path program 1 times [2021-10-15 19:34:30,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:30,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599160287] [2021-10-15 19:34:30,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:30,747 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:30,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:30,880 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-10-15 19:34:30,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:30,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599160287] [2021-10-15 19:34:30,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599160287] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:34:30,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:34:30,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:34:30,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452319604] [2021-10-15 19:34:30,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:34:30,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:30,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:34:30,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:34:30,885 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 19:34:30,885 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 641 transitions, 8391 flow. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 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 19:34:30,885 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:30,886 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 19:34:30,886 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:33,079 INFO L129 PetriNetUnfolder]: 381/4213 cut-off events. [2021-10-15 19:34:33,079 INFO L130 PetriNetUnfolder]: For 12895/12895 co-relation queries the response was YES. [2021-10-15 19:34:33,086 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10920 conditions, 4213 events. 381/4213 cut-off events. For 12895/12895 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 23262 event pairs, 0 based on Foata normal form. 124/4337 useless extension candidates. Maximal degree in co-relation 10888. Up to 3197 conditions per place. [2021-10-15 19:34:33,095 INFO L132 encePairwiseOnDemand]: 295/344 looper letters, 557 selfloop transitions, 94 changer transitions 0/658 dead transitions. [2021-10-15 19:34:33,095 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 658 transitions, 7841 flow [2021-10-15 19:34:33,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:34:33,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:34:33,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 402 transitions. [2021-10-15 19:34:33,098 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2021-10-15 19:34:33,098 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 402 transitions. [2021-10-15 19:34:33,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 402 transitions. [2021-10-15 19:34:33,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:33,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 402 transitions. [2021-10-15 19:34:33,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 19:34:33,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 19:34:33,103 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 19:34:33,104 INFO L186 Difference]: Start difference. First operand has 183 places, 641 transitions, 8391 flow. Second operand 3 states and 402 transitions. [2021-10-15 19:34:33,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 658 transitions, 7841 flow [2021-10-15 19:34:33,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 658 transitions, 7527 flow, removed 62 selfloop flow, removed 2 redundant places. [2021-10-15 19:34:33,184 INFO L242 Difference]: Finished difference. Result has 183 places, 522 transitions, 6139 flow [2021-10-15 19:34:33,185 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=5951, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=6139, PETRI_PLACES=183, PETRI_TRANSITIONS=522} [2021-10-15 19:34:33,186 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -20 predicate places. [2021-10-15 19:34:33,186 INFO L470 AbstractCegarLoop]: Abstraction has has 183 places, 522 transitions, 6139 flow [2021-10-15 19:34:33,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 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 19:34:33,186 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:33,187 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, 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, 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] [2021-10-15 19:34:33,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-15 19:34:33,187 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:34:33,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:33,188 INFO L82 PathProgramCache]: Analyzing trace with hash 169162948, now seen corresponding path program 1 times [2021-10-15 19:34:33,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:33,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147094586] [2021-10-15 19:34:33,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:33,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:33,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:33,322 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2021-10-15 19:34:33,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:33,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147094586] [2021-10-15 19:34:33,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147094586] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:34:33,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:34:33,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:34:33,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790265545] [2021-10-15 19:34:33,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:34:33,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:33,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:34:33,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:34:33,326 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 19:34:33,326 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 522 transitions, 6139 flow. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 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 19:34:33,326 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:33,327 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 19:34:33,327 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:35,803 INFO L129 PetriNetUnfolder]: 352/5031 cut-off events. [2021-10-15 19:34:35,803 INFO L130 PetriNetUnfolder]: For 10618/10618 co-relation queries the response was YES. [2021-10-15 19:34:35,816 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12275 conditions, 5031 events. 352/5031 cut-off events. For 10618/10618 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 30962 event pairs, 0 based on Foata normal form. 119/5150 useless extension candidates. Maximal degree in co-relation 12244. Up to 3863 conditions per place. [2021-10-15 19:34:35,831 INFO L132 encePairwiseOnDemand]: 290/344 looper letters, 459 selfloop transitions, 0 changer transitions 163/629 dead transitions. [2021-10-15 19:34:35,831 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 629 transitions, 7170 flow [2021-10-15 19:34:35,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:34:35,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:34:35,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 422 transitions. [2021-10-15 19:34:35,845 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.40891472868217055 [2021-10-15 19:34:35,845 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 422 transitions. [2021-10-15 19:34:35,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 422 transitions. [2021-10-15 19:34:35,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:35,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 422 transitions. [2021-10-15 19:34:35,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 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 19:34:35,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 19:34:35,852 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 19:34:35,852 INFO L186 Difference]: Start difference. First operand has 183 places, 522 transitions, 6139 flow. Second operand 3 states and 422 transitions. [2021-10-15 19:34:35,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 629 transitions, 7170 flow [2021-10-15 19:34:35,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 629 transitions, 7081 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:34:35,937 INFO L242 Difference]: Finished difference. Result has 185 places, 466 transitions, 5305 flow [2021-10-15 19:34:35,938 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=5563, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=5305, PETRI_PLACES=185, PETRI_TRANSITIONS=466} [2021-10-15 19:34:35,939 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -18 predicate places. [2021-10-15 19:34:35,939 INFO L470 AbstractCegarLoop]: Abstraction has has 185 places, 466 transitions, 5305 flow [2021-10-15 19:34:35,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 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 19:34:35,939 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:35,940 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, 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, 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 19:34:35,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-15 19:34:35,940 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:34:35,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:35,941 INFO L82 PathProgramCache]: Analyzing trace with hash 352328165, now seen corresponding path program 1 times [2021-10-15 19:34:35,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:35,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084041564] [2021-10-15 19:34:35,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:35,942 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:36,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:36,150 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 351 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-10-15 19:34:36,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:36,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084041564] [2021-10-15 19:34:36,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084041564] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:34:36,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:34:36,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:34:36,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105569986] [2021-10-15 19:34:36,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:34:36,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:36,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:34:36,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:34:36,157 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 19:34:36,157 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 466 transitions, 5305 flow. Second operand has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 0 states have call successors, (0), 0 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 19:34:36,157 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:36,157 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 19:34:36,157 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:38,417 INFO L129 PetriNetUnfolder]: 335/4298 cut-off events. [2021-10-15 19:34:38,417 INFO L130 PetriNetUnfolder]: For 7902/7902 co-relation queries the response was YES. [2021-10-15 19:34:38,427 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10702 conditions, 4298 events. 335/4298 cut-off events. For 7902/7902 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 23756 event pairs, 0 based on Foata normal form. 5/4303 useless extension candidates. Maximal degree in co-relation 10679. Up to 2741 conditions per place. [2021-10-15 19:34:38,440 INFO L132 encePairwiseOnDemand]: 303/344 looper letters, 644 selfloop transitions, 101 changer transitions 0/752 dead transitions. [2021-10-15 19:34:38,441 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 752 transitions, 7519 flow [2021-10-15 19:34:38,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:34:38,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:34:38,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 558 transitions. [2021-10-15 19:34:38,444 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4055232558139535 [2021-10-15 19:34:38,444 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 558 transitions. [2021-10-15 19:34:38,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 558 transitions. [2021-10-15 19:34:38,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:38,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 558 transitions. [2021-10-15 19:34:38,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 139.5) internal successors, (558), 4 states have internal predecessors, (558), 0 states have call successors, (0), 0 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 19:34:38,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 344.0) internal successors, (1720), 5 states have internal predecessors, (1720), 0 states have call successors, (0), 0 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 19:34:38,452 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 344.0) internal successors, (1720), 5 states have internal predecessors, (1720), 0 states have call successors, (0), 0 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 19:34:38,452 INFO L186 Difference]: Start difference. First operand has 185 places, 466 transitions, 5305 flow. Second operand 4 states and 558 transitions. [2021-10-15 19:34:38,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 752 transitions, 7519 flow [2021-10-15 19:34:38,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 752 transitions, 7291 flow, removed 114 selfloop flow, removed 1 redundant places. [2021-10-15 19:34:38,542 INFO L242 Difference]: Finished difference. Result has 188 places, 476 transitions, 5533 flow [2021-10-15 19:34:38,543 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=5000, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5533, PETRI_PLACES=188, PETRI_TRANSITIONS=476} [2021-10-15 19:34:38,543 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -15 predicate places. [2021-10-15 19:34:38,543 INFO L470 AbstractCegarLoop]: Abstraction has has 188 places, 476 transitions, 5533 flow [2021-10-15 19:34:38,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 0 states have call successors, (0), 0 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 19:34:38,544 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:38,545 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, 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, 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] [2021-10-15 19:34:38,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-15 19:34:38,545 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:34:38,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:38,546 INFO L82 PathProgramCache]: Analyzing trace with hash -597199170, now seen corresponding path program 1 times [2021-10-15 19:34:38,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:38,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614458843] [2021-10-15 19:34:38,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:38,547 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:38,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:38,709 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2021-10-15 19:34:38,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:38,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614458843] [2021-10-15 19:34:38,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614458843] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:34:38,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:34:38,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:34:38,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652117186] [2021-10-15 19:34:38,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:34:38,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:38,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:34:38,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:34:38,714 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 344 [2021-10-15 19:34:38,715 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 476 transitions, 5533 flow. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 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 19:34:38,715 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:38,715 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 344 [2021-10-15 19:34:38,715 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:40,477 INFO L129 PetriNetUnfolder]: 290/4251 cut-off events. [2021-10-15 19:34:40,477 INFO L130 PetriNetUnfolder]: For 8241/8241 co-relation queries the response was YES. [2021-10-15 19:34:40,487 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10351 conditions, 4251 events. 290/4251 cut-off events. For 8241/8241 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 23679 event pairs, 0 based on Foata normal form. 46/4297 useless extension candidates. Maximal degree in co-relation 10327. Up to 3088 conditions per place. [2021-10-15 19:34:40,490 INFO L132 encePairwiseOnDemand]: 302/344 looper letters, 0 selfloop transitions, 0 changer transitions 565/565 dead transitions. [2021-10-15 19:34:40,491 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 565 transitions, 6188 flow [2021-10-15 19:34:40,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:34:40,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:34:40,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 393 transitions. [2021-10-15 19:34:40,508 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2021-10-15 19:34:40,509 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 393 transitions. [2021-10-15 19:34:40,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 393 transitions. [2021-10-15 19:34:40,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:40,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 393 transitions. [2021-10-15 19:34:40,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 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 19:34:40,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 19:34:40,513 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 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 19:34:40,514 INFO L186 Difference]: Start difference. First operand has 188 places, 476 transitions, 5533 flow. Second operand 3 states and 393 transitions. [2021-10-15 19:34:40,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 565 transitions, 6188 flow [2021-10-15 19:34:40,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 565 transitions, 6114 flow, removed 11 selfloop flow, removed 1 redundant places. [2021-10-15 19:34:40,575 INFO L242 Difference]: Finished difference. Result has 187 places, 0 transitions, 0 flow [2021-10-15 19:34:40,576 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=344, PETRI_DIFFERENCE_MINUEND_FLOW=4722, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=187, PETRI_TRANSITIONS=0} [2021-10-15 19:34:40,576 INFO L334 CegarLoopForPetriNet]: 203 programPoint places, -16 predicate places. [2021-10-15 19:34:40,576 INFO L470 AbstractCegarLoop]: Abstraction has has 187 places, 0 transitions, 0 flow [2021-10-15 19:34:40,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 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 19:34:40,579 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:34:40,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-15 19:34:40,585 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:34:40,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:34:40 BoogieIcfgContainer [2021-10-15 19:34:40,591 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:34:40,591 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:34:40,592 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:34:40,592 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:34:40,592 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:34:06" (3/4) ... [2021-10-15 19:34:40,596 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:34:40,635 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-15 19:34:40,636 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:34:40,638 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:34:40,639 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:34:40,777 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d41a73-e5a1-4bb1-95a2-5cf846b4dca5/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:34:40,777 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:34:40,779 INFO L168 Benchmark]: Toolchain (without parser) took 36286.93 ms. Allocated memory was 92.3 MB in the beginning and 885.0 MB in the end (delta: 792.7 MB). Free memory was 58.1 MB in the beginning and 295.0 MB in the end (delta: -236.9 MB). Peak memory consumption was 555.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:34:40,779 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 92.3 MB. Free memory is still 47.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:34:40,779 INFO L168 Benchmark]: CACSL2BoogieTranslator took 741.40 ms. Allocated memory is still 92.3 MB. Free memory was 57.9 MB in the beginning and 51.4 MB in the end (delta: 6.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:34:40,780 INFO L168 Benchmark]: Boogie Procedure Inliner took 121.84 ms. Allocated memory is still 92.3 MB. Free memory was 51.4 MB in the beginning and 43.4 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:34:40,780 INFO L168 Benchmark]: Boogie Preprocessor took 122.09 ms. Allocated memory is still 92.3 MB. Free memory was 43.4 MB in the beginning and 38.6 MB in the end (delta: 4.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:34:40,781 INFO L168 Benchmark]: RCFGBuilder took 1349.57 ms. Allocated memory was 92.3 MB in the beginning and 113.2 MB in the end (delta: 21.0 MB). Free memory was 38.6 MB in the beginning and 74.4 MB in the end (delta: -35.9 MB). Peak memory consumption was 25.6 MB. Max. memory is 16.1 GB. [2021-10-15 19:34:40,781 INFO L168 Benchmark]: TraceAbstraction took 33758.27 ms. Allocated memory was 113.2 MB in the beginning and 885.0 MB in the end (delta: 771.8 MB). Free memory was 73.7 MB in the beginning and 308.6 MB in the end (delta: -234.9 MB). Peak memory consumption was 536.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:34:40,782 INFO L168 Benchmark]: Witness Printer took 185.76 ms. Allocated memory is still 885.0 MB. Free memory was 308.6 MB in the beginning and 295.0 MB in the end (delta: 13.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:34:40,784 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 92.3 MB. Free memory is still 47.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 741.40 ms. Allocated memory is still 92.3 MB. Free memory was 57.9 MB in the beginning and 51.4 MB in the end (delta: 6.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 121.84 ms. Allocated memory is still 92.3 MB. Free memory was 51.4 MB in the beginning and 43.4 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 122.09 ms. Allocated memory is still 92.3 MB. Free memory was 43.4 MB in the beginning and 38.6 MB in the end (delta: 4.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1349.57 ms. Allocated memory was 92.3 MB in the beginning and 113.2 MB in the end (delta: 21.0 MB). Free memory was 38.6 MB in the beginning and 74.4 MB in the end (delta: -35.9 MB). Peak memory consumption was 25.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 33758.27 ms. Allocated memory was 113.2 MB in the beginning and 885.0 MB in the end (delta: 771.8 MB). Free memory was 73.7 MB in the beginning and 308.6 MB in the end (delta: -234.9 MB). Peak memory consumption was 536.2 MB. Max. memory is 16.1 GB. * Witness Printer took 185.76 ms. Allocated memory is still 885.0 MB. Free memory was 308.6 MB in the beginning and 295.0 MB in the end (delta: 13.6 MB). Peak memory consumption was 14.7 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: 209]: 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, 206 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 30.9ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 33684.6ms, OverallIterations: 14, TraceHistogramMax: 4, EmptinessCheckTime: 0.0ms, AutomataDifference: 26850.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 113.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1418 SDtfs, 2049 SDslu, 4 SDs, 0 SdLazy, 7555 SolverSat, 1316 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7875.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 792 GetRequests, 757 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 199.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=9275occurred in iteration=8, InterpolantAutomatonStates: 56, 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: 257.0ms SsaConstructionTime, 782.0ms SatisfiabilityAnalysisTime, 4316.6ms InterpolantComputationTime, 3914 NumberOfCodeBlocks, 3914 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 3897 ConstructedInterpolants, 0 QuantifiedInterpolants, 13841 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1086 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 17 InterpolantComputations, 13 PerfectInterpolantSequences, 3027/3388 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 19:34:40,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d41a73-e5a1-4bb1-95a2-5cf846b4dca5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...