./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD --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 b585114ab4aff9777d36c84f93f7abe0931f77338421f004296c8a8d328d3dfd ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 23:57:27,948 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:57:27,951 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:57:28,006 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:57:28,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:57:28,011 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:57:28,013 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:57:28,017 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:57:28,019 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:57:28,025 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:57:28,026 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:57:28,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:57:28,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:57:28,031 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:57:28,033 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:57:28,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:57:28,039 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:57:28,040 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:57:28,042 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:57:28,050 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:57:28,052 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:57:28,053 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:57:28,056 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:57:28,057 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:57:28,065 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:57:28,066 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:57:28,067 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:57:28,068 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:57:28,069 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:57:28,071 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:57:28,071 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:57:28,072 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:57:28,074 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:57:28,075 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:57:28,076 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:57:28,077 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:57:28,077 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:57:28,078 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:57:28,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:57:28,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:57:28,079 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:57:28,080 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 23:57:28,122 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:57:28,122 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:57:28,123 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:57:28,123 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:57:28,130 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:57:28,131 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:57:28,131 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:57:28,131 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:57:28,132 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 23:57:28,132 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:57:28,133 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 23:57:28,133 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:57:28,133 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 23:57:28,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 23:57:28,134 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 23:57:28,134 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 23:57:28,134 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 23:57:28,134 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:57:28,135 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 23:57:28,135 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:57:28,135 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:57:28,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 23:57:28,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:57:28,136 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:57:28,136 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 23:57:28,136 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 23:57:28,136 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:57:28,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 23:57:28,137 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 23:57:28,137 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 23:57:28,137 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 23:57:28,137 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:57:28,138 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_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b585114ab4aff9777d36c84f93f7abe0931f77338421f004296c8a8d328d3dfd [2021-10-28 23:57:28,432 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:57:28,452 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:57:28,454 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:57:28,456 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:57:28,456 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:57:28,457 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/pthread/triangular-1.i [2021-10-28 23:57:28,514 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/data/dd41e63da/b29509a6c01a4a20b556778419dd11f6/FLAG4645abeed [2021-10-28 23:57:29,071 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:57:29,072 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/sv-benchmarks/c/pthread/triangular-1.i [2021-10-28 23:57:29,101 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/data/dd41e63da/b29509a6c01a4a20b556778419dd11f6/FLAG4645abeed [2021-10-28 23:57:29,377 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/data/dd41e63da/b29509a6c01a4a20b556778419dd11f6 [2021-10-28 23:57:29,379 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:57:29,381 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 23:57:29,382 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:57:29,383 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:57:29,386 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:57:29,387 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:57:29" (1/1) ... [2021-10-28 23:57:29,388 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fb688a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:57:29, skipping insertion in model container [2021-10-28 23:57:29,388 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:57:29" (1/1) ... [2021-10-28 23:57:29,410 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:57:29,473 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:57:29,904 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_395f5739-3568-4e9b-9906-70d8a45d3f0f/sv-benchmarks/c/pthread/triangular-1.i[30950,30963] [2021-10-28 23:57:29,911 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:57:29,919 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:57:29,981 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_395f5739-3568-4e9b-9906-70d8a45d3f0f/sv-benchmarks/c/pthread/triangular-1.i[30950,30963] [2021-10-28 23:57:29,983 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:57:30,034 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:57:30,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:57:30 WrapperNode [2021-10-28 23:57:30,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:57:30,037 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 23:57:30,037 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 23:57:30,037 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 23:57:30,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:57:30" (1/1) ... [2021-10-28 23:57:30,057 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:57:30" (1/1) ... [2021-10-28 23:57:30,076 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 23:57:30,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:57:30,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:57:30,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:57:30,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:57:30" (1/1) ... [2021-10-28 23:57:30,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:57:30" (1/1) ... [2021-10-28 23:57:30,089 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:57:30" (1/1) ... [2021-10-28 23:57:30,099 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:57:30" (1/1) ... [2021-10-28 23:57:30,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:57:30" (1/1) ... [2021-10-28 23:57:30,115 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:57:30" (1/1) ... [2021-10-28 23:57:30,121 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:57:30" (1/1) ... [2021-10-28 23:57:30,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:57:30,133 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:57:30,134 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:57:30,134 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:57:30,135 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:57:30" (1/1) ... [2021-10-28 23:57:30,143 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:57:30,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:30,169 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 23:57:30,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 23:57:30,219 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-10-28 23:57:30,219 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-10-28 23:57:30,220 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-10-28 23:57:30,220 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-10-28 23:57:30,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 23:57:30,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-28 23:57:30,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:57:30,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 23:57:30,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 23:57:30,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-28 23:57:30,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:57:30,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:57:30,223 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-28 23:57:30,596 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:57:30,598 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-28 23:57:30,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:57:30 BoogieIcfgContainer [2021-10-28 23:57:30,600 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:57:30,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 23:57:30,602 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 23:57:30,607 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 23:57:30,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:57:29" (1/3) ... [2021-10-28 23:57:30,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba233f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:57:30, skipping insertion in model container [2021-10-28 23:57:30,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:57:30" (2/3) ... [2021-10-28 23:57:30,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba233f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:57:30, skipping insertion in model container [2021-10-28 23:57:30,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:57:30" (3/3) ... [2021-10-28 23:57:30,610 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2021-10-28 23:57:30,616 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-28 23:57:30,616 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 23:57:30,616 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 23:57:30,617 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-28 23:57:30,651 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,652 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,652 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,652 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,652 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,653 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,653 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,653 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,654 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,654 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,655 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,656 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,656 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,657 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,657 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,657 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,657 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,657 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,658 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,659 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,659 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,659 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,660 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,660 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,660 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,660 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,661 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,661 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,662 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,663 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,663 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,664 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,664 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,664 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,665 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,665 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,665 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,665 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,666 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,666 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,666 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,666 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,667 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,667 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,667 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,667 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,668 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,668 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,668 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,668 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,669 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,669 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,669 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,669 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,672 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,672 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,681 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,682 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,682 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,682 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,682 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,683 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,693 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,694 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,694 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,694 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,694 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,695 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:57:30,698 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-10-28 23:57:30,755 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 23:57:30,763 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 23:57:30,763 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-28 23:57:30,784 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 68 places, 66 transitions, 142 flow [2021-10-28 23:57:30,851 INFO L129 PetriNetUnfolder]: 5/64 cut-off events. [2021-10-28 23:57:30,852 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-28 23:57:30,858 INFO L84 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 5/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2021-10-28 23:57:30,875 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 66 transitions, 142 flow [2021-10-28 23:57:30,882 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 64 transitions, 134 flow [2021-10-28 23:57:30,908 INFO L129 PetriNetUnfolder]: 3/52 cut-off events. [2021-10-28 23:57:30,908 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-28 23:57:30,908 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:57:30,909 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] [2021-10-28 23:57:30,910 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:57:30,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:30,916 INFO L85 PathProgramCache]: Analyzing trace with hash 2112281486, now seen corresponding path program 1 times [2021-10-28 23:57:30,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:30,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146310084] [2021-10-28 23:57:30,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:30,938 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:31,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:31,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:31,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:31,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146310084] [2021-10-28 23:57:31,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146310084] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:57:31,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:57:31,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 23:57:31,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643768108] [2021-10-28 23:57:31,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:57:31,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:31,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:57:31,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:57:31,413 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 23:57:31,421 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 54.0) internal successors, (324), 6 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:31,421 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:57:31,422 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 23:57:31,423 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:57:31,623 INFO L129 PetriNetUnfolder]: 44/194 cut-off events. [2021-10-28 23:57:31,627 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-28 23:57:31,630 INFO L84 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 194 events. 44/194 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 723 event pairs, 3 based on Foata normal form. 47/223 useless extension candidates. Maximal degree in co-relation 243. Up to 29 conditions per place. [2021-10-28 23:57:31,633 INFO L132 encePairwiseOnDemand]: 55/66 looper letters, 11 selfloop transitions, 9 changer transitions 23/87 dead transitions. [2021-10-28 23:57:31,633 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 87 transitions, 252 flow [2021-10-28 23:57:31,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:57:31,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-28 23:57:31,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 590 transitions. [2021-10-28 23:57:31,657 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8939393939393939 [2021-10-28 23:57:31,658 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 590 transitions. [2021-10-28 23:57:31,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 590 transitions. [2021-10-28 23:57:31,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:57:31,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 590 transitions. [2021-10-28 23:57:31,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 59.0) internal successors, (590), 10 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:31,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 66.0) internal successors, (726), 11 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:31,680 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 66.0) internal successors, (726), 11 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:31,682 INFO L186 Difference]: Start difference. First operand has 66 places, 64 transitions, 134 flow. Second operand 10 states and 590 transitions. [2021-10-28 23:57:31,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 87 transitions, 252 flow [2021-10-28 23:57:31,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 87 transitions, 250 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-28 23:57:31,694 INFO L242 Difference]: Finished difference. Result has 79 places, 61 transitions, 175 flow [2021-10-28 23:57:31,696 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=175, PETRI_PLACES=79, PETRI_TRANSITIONS=61} [2021-10-28 23:57:31,697 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 13 predicate places. [2021-10-28 23:57:31,697 INFO L470 AbstractCegarLoop]: Abstraction has has 79 places, 61 transitions, 175 flow [2021-10-28 23:57:31,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.0) internal successors, (324), 6 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:31,698 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:57:31,698 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] [2021-10-28 23:57:31,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 23:57:31,699 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:57:31,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:31,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1447548911, now seen corresponding path program 1 times [2021-10-28 23:57:31,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:31,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358795525] [2021-10-28 23:57:31,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:31,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:31,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:31,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:31,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:31,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358795525] [2021-10-28 23:57:31,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358795525] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:57:31,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:57:31,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 23:57:31,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755898347] [2021-10-28 23:57:31,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:57:31,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:31,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:57:31,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:57:31,920 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 23:57:31,920 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 61 transitions, 175 flow. Second operand has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:31,926 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:57:31,926 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 23:57:31,926 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:57:32,068 INFO L129 PetriNetUnfolder]: 25/130 cut-off events. [2021-10-28 23:57:32,069 INFO L130 PetriNetUnfolder]: For 64/72 co-relation queries the response was YES. [2021-10-28 23:57:32,072 INFO L84 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 130 events. 25/130 cut-off events. For 64/72 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 343 event pairs, 0 based on Foata normal form. 7/124 useless extension candidates. Maximal degree in co-relation 206. Up to 29 conditions per place. [2021-10-28 23:57:32,073 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 13 selfloop transitions, 9 changer transitions 5/71 dead transitions. [2021-10-28 23:57:32,073 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 71 transitions, 271 flow [2021-10-28 23:57:32,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:57:32,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-28 23:57:32,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 394 transitions. [2021-10-28 23:57:32,078 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8528138528138528 [2021-10-28 23:57:32,078 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 394 transitions. [2021-10-28 23:57:32,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 394 transitions. [2021-10-28 23:57:32,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:57:32,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 394 transitions. [2021-10-28 23:57:32,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 56.285714285714285) internal successors, (394), 7 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:32,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 66.0) internal successors, (528), 8 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:32,083 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 66.0) internal successors, (528), 8 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:32,083 INFO L186 Difference]: Start difference. First operand has 79 places, 61 transitions, 175 flow. Second operand 7 states and 394 transitions. [2021-10-28 23:57:32,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 71 transitions, 271 flow [2021-10-28 23:57:32,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 71 transitions, 263 flow, removed 4 selfloop flow, removed 4 redundant places. [2021-10-28 23:57:32,089 INFO L242 Difference]: Finished difference. Result has 73 places, 64 transitions, 214 flow [2021-10-28 23:57:32,090 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=214, PETRI_PLACES=73, PETRI_TRANSITIONS=64} [2021-10-28 23:57:32,090 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 7 predicate places. [2021-10-28 23:57:32,090 INFO L470 AbstractCegarLoop]: Abstraction has has 73 places, 64 transitions, 214 flow [2021-10-28 23:57:32,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:32,091 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:57:32,092 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] [2021-10-28 23:57:32,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 23:57:32,092 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:57:32,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:32,093 INFO L85 PathProgramCache]: Analyzing trace with hash 263941995, now seen corresponding path program 1 times [2021-10-28 23:57:32,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:32,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414497025] [2021-10-28 23:57:32,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:32,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:32,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:32,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:32,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:32,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414497025] [2021-10-28 23:57:32,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414497025] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:57:32,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:57:32,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 23:57:32,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263145262] [2021-10-28 23:57:32,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:57:32,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:32,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:57:32,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:57:32,233 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 23:57:32,234 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 64 transitions, 214 flow. Second operand has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:32,234 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:57:32,235 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 23:57:32,235 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:57:32,353 INFO L129 PetriNetUnfolder]: 35/182 cut-off events. [2021-10-28 23:57:32,353 INFO L130 PetriNetUnfolder]: For 116/133 co-relation queries the response was YES. [2021-10-28 23:57:32,355 INFO L84 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 182 events. 35/182 cut-off events. For 116/133 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 584 event pairs, 0 based on Foata normal form. 20/185 useless extension candidates. Maximal degree in co-relation 317. Up to 33 conditions per place. [2021-10-28 23:57:32,357 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 20 selfloop transitions, 11 changer transitions 8/83 dead transitions. [2021-10-28 23:57:32,357 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 83 transitions, 394 flow [2021-10-28 23:57:32,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:57:32,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-28 23:57:32,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 509 transitions. [2021-10-28 23:57:32,360 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8569023569023569 [2021-10-28 23:57:32,360 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 509 transitions. [2021-10-28 23:57:32,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 509 transitions. [2021-10-28 23:57:32,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:57:32,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 509 transitions. [2021-10-28 23:57:32,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 56.55555555555556) internal successors, (509), 9 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:32,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:32,366 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:32,366 INFO L186 Difference]: Start difference. First operand has 73 places, 64 transitions, 214 flow. Second operand 9 states and 509 transitions. [2021-10-28 23:57:32,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 83 transitions, 394 flow [2021-10-28 23:57:32,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 83 transitions, 371 flow, removed 9 selfloop flow, removed 3 redundant places. [2021-10-28 23:57:32,372 INFO L242 Difference]: Finished difference. Result has 83 places, 69 transitions, 283 flow [2021-10-28 23:57:32,372 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=283, PETRI_PLACES=83, PETRI_TRANSITIONS=69} [2021-10-28 23:57:32,372 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 17 predicate places. [2021-10-28 23:57:32,373 INFO L470 AbstractCegarLoop]: Abstraction has has 83 places, 69 transitions, 283 flow [2021-10-28 23:57:32,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:32,373 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:57:32,373 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] [2021-10-28 23:57:32,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 23:57:32,374 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:57:32,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:32,374 INFO L85 PathProgramCache]: Analyzing trace with hash 482644881, now seen corresponding path program 2 times [2021-10-28 23:57:32,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:32,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214824114] [2021-10-28 23:57:32,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:32,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:32,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:32,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:32,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:32,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214824114] [2021-10-28 23:57:32,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214824114] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:57:32,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:57:32,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 23:57:32,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287642157] [2021-10-28 23:57:32,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:57:32,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:32,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:57:32,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:57:32,503 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 23:57:32,505 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 69 transitions, 283 flow. Second operand has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:32,505 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:57:32,505 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 23:57:32,506 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:57:32,636 INFO L129 PetriNetUnfolder]: 28/171 cut-off events. [2021-10-28 23:57:32,636 INFO L130 PetriNetUnfolder]: For 239/271 co-relation queries the response was YES. [2021-10-28 23:57:32,638 INFO L84 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 171 events. 28/171 cut-off events. For 239/271 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 551 event pairs, 0 based on Foata normal form. 28/183 useless extension candidates. Maximal degree in co-relation 346. Up to 30 conditions per place. [2021-10-28 23:57:32,639 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 16 selfloop transitions, 12 changer transitions 11/83 dead transitions. [2021-10-28 23:57:32,639 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 83 transitions, 471 flow [2021-10-28 23:57:32,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:57:32,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-28 23:57:32,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 503 transitions. [2021-10-28 23:57:32,642 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8468013468013468 [2021-10-28 23:57:32,642 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 503 transitions. [2021-10-28 23:57:32,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 503 transitions. [2021-10-28 23:57:32,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:57:32,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 503 transitions. [2021-10-28 23:57:32,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 55.888888888888886) internal successors, (503), 9 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:32,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:32,647 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:32,647 INFO L186 Difference]: Start difference. First operand has 83 places, 69 transitions, 283 flow. Second operand 9 states and 503 transitions. [2021-10-28 23:57:32,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 83 transitions, 471 flow [2021-10-28 23:57:32,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 83 transitions, 451 flow, removed 6 selfloop flow, removed 3 redundant places. [2021-10-28 23:57:32,661 INFO L242 Difference]: Finished difference. Result has 90 places, 70 transitions, 326 flow [2021-10-28 23:57:32,661 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=326, PETRI_PLACES=90, PETRI_TRANSITIONS=70} [2021-10-28 23:57:32,661 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 24 predicate places. [2021-10-28 23:57:32,662 INFO L470 AbstractCegarLoop]: Abstraction has has 90 places, 70 transitions, 326 flow [2021-10-28 23:57:32,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.166666666666664) internal successors, (325), 6 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:32,662 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:57:32,662 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] [2021-10-28 23:57:32,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 23:57:32,664 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:57:32,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:32,664 INFO L85 PathProgramCache]: Analyzing trace with hash 557630062, now seen corresponding path program 1 times [2021-10-28 23:57:32,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:32,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379181679] [2021-10-28 23:57:32,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:32,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:32,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:32,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:32,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:32,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379181679] [2021-10-28 23:57:32,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379181679] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:57:32,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:57:32,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 23:57:32,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872089203] [2021-10-28 23:57:32,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:57:32,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:32,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:57:32,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:57:32,794 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 23:57:32,795 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 70 transitions, 326 flow. Second operand has 7 states, 7 states have (on average 54.142857142857146) internal successors, (379), 7 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:32,795 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:57:32,795 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 23:57:32,795 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:57:32,965 INFO L129 PetriNetUnfolder]: 41/214 cut-off events. [2021-10-28 23:57:32,965 INFO L130 PetriNetUnfolder]: For 570/604 co-relation queries the response was YES. [2021-10-28 23:57:32,967 INFO L84 FinitePrefix]: Finished finitePrefix Result has 556 conditions, 214 events. 41/214 cut-off events. For 570/604 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 743 event pairs, 0 based on Foata normal form. 20/215 useless extension candidates. Maximal degree in co-relation 506. Up to 48 conditions per place. [2021-10-28 23:57:32,969 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 21 selfloop transitions, 21 changer transitions 8/94 dead transitions. [2021-10-28 23:57:32,969 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 94 transitions, 650 flow [2021-10-28 23:57:32,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 23:57:32,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-28 23:57:32,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 620 transitions. [2021-10-28 23:57:32,973 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8539944903581267 [2021-10-28 23:57:32,973 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 620 transitions. [2021-10-28 23:57:32,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 620 transitions. [2021-10-28 23:57:32,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:57:32,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 620 transitions. [2021-10-28 23:57:32,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 56.36363636363637) internal successors, (620), 11 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:32,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 66.0) internal successors, (792), 12 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:32,978 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 66.0) internal successors, (792), 12 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:32,979 INFO L186 Difference]: Start difference. First operand has 90 places, 70 transitions, 326 flow. Second operand 11 states and 620 transitions. [2021-10-28 23:57:32,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 94 transitions, 650 flow [2021-10-28 23:57:32,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 94 transitions, 534 flow, removed 45 selfloop flow, removed 10 redundant places. [2021-10-28 23:57:32,988 INFO L242 Difference]: Finished difference. Result has 94 places, 76 transitions, 411 flow [2021-10-28 23:57:32,988 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=411, PETRI_PLACES=94, PETRI_TRANSITIONS=76} [2021-10-28 23:57:32,988 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 28 predicate places. [2021-10-28 23:57:32,988 INFO L470 AbstractCegarLoop]: Abstraction has has 94 places, 76 transitions, 411 flow [2021-10-28 23:57:32,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 54.142857142857146) internal successors, (379), 7 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:32,989 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:57:32,989 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] [2021-10-28 23:57:32,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 23:57:32,990 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:57:32,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:32,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1889861268, now seen corresponding path program 2 times [2021-10-28 23:57:32,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:32,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656670380] [2021-10-28 23:57:32,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:32,991 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:33,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:33,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:33,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:33,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656670380] [2021-10-28 23:57:33,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656670380] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:57:33,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:57:33,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 23:57:33,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361775819] [2021-10-28 23:57:33,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:57:33,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:33,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:57:33,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:57:33,135 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 23:57:33,135 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 76 transitions, 411 flow. Second operand has 7 states, 7 states have (on average 54.142857142857146) internal successors, (379), 7 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:33,136 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:57:33,136 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 23:57:33,136 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:57:33,322 INFO L129 PetriNetUnfolder]: 36/206 cut-off events. [2021-10-28 23:57:33,323 INFO L130 PetriNetUnfolder]: For 803/857 co-relation queries the response was YES. [2021-10-28 23:57:33,324 INFO L84 FinitePrefix]: Finished finitePrefix Result has 594 conditions, 206 events. 36/206 cut-off events. For 803/857 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 748 event pairs, 0 based on Foata normal form. 29/216 useless extension candidates. Maximal degree in co-relation 550. Up to 44 conditions per place. [2021-10-28 23:57:33,326 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 19 selfloop transitions, 23 changer transitions 11/97 dead transitions. [2021-10-28 23:57:33,326 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 97 transitions, 781 flow [2021-10-28 23:57:33,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 23:57:33,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-28 23:57:33,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 670 transitions. [2021-10-28 23:57:33,330 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8459595959595959 [2021-10-28 23:57:33,330 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 670 transitions. [2021-10-28 23:57:33,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 670 transitions. [2021-10-28 23:57:33,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:57:33,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 670 transitions. [2021-10-28 23:57:33,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 55.833333333333336) internal successors, (670), 12 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:33,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 66.0) internal successors, (858), 13 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:33,337 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 66.0) internal successors, (858), 13 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:33,337 INFO L186 Difference]: Start difference. First operand has 94 places, 76 transitions, 411 flow. Second operand 12 states and 670 transitions. [2021-10-28 23:57:33,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 97 transitions, 781 flow [2021-10-28 23:57:33,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 97 transitions, 723 flow, removed 20 selfloop flow, removed 5 redundant places. [2021-10-28 23:57:33,345 INFO L242 Difference]: Finished difference. Result has 103 places, 79 transitions, 499 flow [2021-10-28 23:57:33,346 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=499, PETRI_PLACES=103, PETRI_TRANSITIONS=79} [2021-10-28 23:57:33,346 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 37 predicate places. [2021-10-28 23:57:33,346 INFO L470 AbstractCegarLoop]: Abstraction has has 103 places, 79 transitions, 499 flow [2021-10-28 23:57:33,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 54.142857142857146) internal successors, (379), 7 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:33,347 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:57:33,347 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:33,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 23:57:33,348 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:57:33,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:33,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1339160469, now seen corresponding path program 1 times [2021-10-28 23:57:33,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:33,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186435318] [2021-10-28 23:57:33,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:33,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:33,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:33,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:33,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:33,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186435318] [2021-10-28 23:57:33,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186435318] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:33,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302248004] [2021-10-28 23:57:33,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:33,478 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:33,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:33,484 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:33,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 23:57:33,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:33,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 23:57:33,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:33,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:33,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302248004] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:33,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:57:33,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-28 23:57:33,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632868162] [2021-10-28 23:57:33,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:57:33,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:33,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:57:33,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:57:33,843 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 23:57:33,844 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 79 transitions, 499 flow. Second operand has 9 states, 9 states have (on average 54.22222222222222) internal successors, (488), 9 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:33,844 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:57:33,844 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 23:57:33,844 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:57:33,991 INFO L129 PetriNetUnfolder]: 36/213 cut-off events. [2021-10-28 23:57:33,992 INFO L130 PetriNetUnfolder]: For 1073/1130 co-relation queries the response was YES. [2021-10-28 23:57:33,994 INFO L84 FinitePrefix]: Finished finitePrefix Result has 654 conditions, 213 events. 36/213 cut-off events. For 1073/1130 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 734 event pairs, 0 based on Foata normal form. 35/227 useless extension candidates. Maximal degree in co-relation 604. Up to 44 conditions per place. [2021-10-28 23:57:33,996 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 28 selfloop transitions, 13 changer transitions 8/93 dead transitions. [2021-10-28 23:57:33,996 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 93 transitions, 807 flow [2021-10-28 23:57:33,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 23:57:33,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-28 23:57:33,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 615 transitions. [2021-10-28 23:57:34,000 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8471074380165289 [2021-10-28 23:57:34,000 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 615 transitions. [2021-10-28 23:57:34,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 615 transitions. [2021-10-28 23:57:34,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:57:34,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 615 transitions. [2021-10-28 23:57:34,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 55.90909090909091) internal successors, (615), 11 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:34,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 66.0) internal successors, (792), 12 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:34,008 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 66.0) internal successors, (792), 12 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:34,009 INFO L186 Difference]: Start difference. First operand has 103 places, 79 transitions, 499 flow. Second operand 11 states and 615 transitions. [2021-10-28 23:57:34,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 93 transitions, 807 flow [2021-10-28 23:57:34,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 93 transitions, 734 flow, removed 19 selfloop flow, removed 9 redundant places. [2021-10-28 23:57:34,022 INFO L242 Difference]: Finished difference. Result has 106 places, 81 transitions, 514 flow [2021-10-28 23:57:34,022 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=514, PETRI_PLACES=106, PETRI_TRANSITIONS=81} [2021-10-28 23:57:34,023 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 40 predicate places. [2021-10-28 23:57:34,023 INFO L470 AbstractCegarLoop]: Abstraction has has 106 places, 81 transitions, 514 flow [2021-10-28 23:57:34,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 54.22222222222222) internal successors, (488), 9 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:34,024 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:57:34,024 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:34,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:34,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:34,249 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:57:34,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:34,249 INFO L85 PathProgramCache]: Analyzing trace with hash 466216687, now seen corresponding path program 2 times [2021-10-28 23:57:34,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:34,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463219524] [2021-10-28 23:57:34,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:34,250 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:34,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:34,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:34,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463219524] [2021-10-28 23:57:34,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463219524] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:34,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186595888] [2021-10-28 23:57:34,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:57:34,349 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:34,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:34,355 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:34,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 23:57:34,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:57:34,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:34,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 23:57:34,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:34,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:34,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186595888] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:34,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:57:34,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-10-28 23:57:34,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945649110] [2021-10-28 23:57:34,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:57:34,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:34,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:57:34,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:57:34,679 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 23:57:34,680 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 81 transitions, 514 flow. Second operand has 10 states, 10 states have (on average 54.3) internal successors, (543), 10 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:34,680 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:57:34,680 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 23:57:34,680 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:57:34,862 INFO L129 PetriNetUnfolder]: 42/245 cut-off events. [2021-10-28 23:57:34,863 INFO L130 PetriNetUnfolder]: For 1540/1608 co-relation queries the response was YES. [2021-10-28 23:57:34,865 INFO L84 FinitePrefix]: Finished finitePrefix Result has 803 conditions, 245 events. 42/245 cut-off events. For 1540/1608 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 964 event pairs, 0 based on Foata normal form. 35/256 useless extension candidates. Maximal degree in co-relation 748. Up to 54 conditions per place. [2021-10-28 23:57:34,869 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 28 selfloop transitions, 21 changer transitions 8/101 dead transitions. [2021-10-28 23:57:34,869 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 101 transitions, 952 flow [2021-10-28 23:57:34,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 23:57:34,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-28 23:57:34,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 782 transitions. [2021-10-28 23:57:34,873 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8463203463203464 [2021-10-28 23:57:34,873 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 782 transitions. [2021-10-28 23:57:34,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 782 transitions. [2021-10-28 23:57:34,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:57:34,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 782 transitions. [2021-10-28 23:57:34,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 55.857142857142854) internal successors, (782), 14 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:34,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 66.0) internal successors, (990), 15 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:34,901 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 66.0) internal successors, (990), 15 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:34,901 INFO L186 Difference]: Start difference. First operand has 106 places, 81 transitions, 514 flow. Second operand 14 states and 782 transitions. [2021-10-28 23:57:34,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 101 transitions, 952 flow [2021-10-28 23:57:34,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 101 transitions, 858 flow, removed 36 selfloop flow, removed 8 redundant places. [2021-10-28 23:57:34,914 INFO L242 Difference]: Finished difference. Result has 115 places, 88 transitions, 629 flow [2021-10-28 23:57:34,914 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=629, PETRI_PLACES=115, PETRI_TRANSITIONS=88} [2021-10-28 23:57:34,914 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 49 predicate places. [2021-10-28 23:57:34,915 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 88 transitions, 629 flow [2021-10-28 23:57:34,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 54.3) internal successors, (543), 10 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:34,915 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:57:34,916 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:34,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:35,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-28 23:57:35,136 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:57:35,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:35,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1190358857, now seen corresponding path program 3 times [2021-10-28 23:57:35,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:35,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44848433] [2021-10-28 23:57:35,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:35,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:35,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:35,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:35,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:35,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44848433] [2021-10-28 23:57:35,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44848433] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:35,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159007433] [2021-10-28 23:57:35,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:57:35,253 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:35,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:35,255 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:35,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 23:57:35,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 23:57:35,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:35,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 23:57:35,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:35,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:35,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159007433] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:35,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:57:35,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-28 23:57:35,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582128859] [2021-10-28 23:57:35,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:57:35,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:35,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:57:35,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:57:35,562 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 23:57:35,562 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 88 transitions, 629 flow. Second operand has 9 states, 9 states have (on average 54.22222222222222) internal successors, (488), 9 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:35,563 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:57:35,563 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 23:57:35,563 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:57:35,854 INFO L129 PetriNetUnfolder]: 57/320 cut-off events. [2021-10-28 23:57:35,854 INFO L130 PetriNetUnfolder]: For 2724/2816 co-relation queries the response was YES. [2021-10-28 23:57:35,857 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1173 conditions, 320 events. 57/320 cut-off events. For 2724/2816 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1464 event pairs, 0 based on Foata normal form. 40/328 useless extension candidates. Maximal degree in co-relation 1112. Up to 74 conditions per place. [2021-10-28 23:57:35,861 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 34 selfloop transitions, 26 changer transitions 8/112 dead transitions. [2021-10-28 23:57:35,861 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 112 transitions, 1217 flow [2021-10-28 23:57:35,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 23:57:35,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-28 23:57:35,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 842 transitions. [2021-10-28 23:57:35,865 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8505050505050505 [2021-10-28 23:57:35,865 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 842 transitions. [2021-10-28 23:57:35,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 842 transitions. [2021-10-28 23:57:35,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:57:35,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 842 transitions. [2021-10-28 23:57:35,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 56.13333333333333) internal successors, (842), 15 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:35,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 66.0) internal successors, (1056), 16 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:35,888 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 66.0) internal successors, (1056), 16 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:35,888 INFO L186 Difference]: Start difference. First operand has 115 places, 88 transitions, 629 flow. Second operand 15 states and 842 transitions. [2021-10-28 23:57:35,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 112 transitions, 1217 flow [2021-10-28 23:57:35,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 112 transitions, 1085 flow, removed 60 selfloop flow, removed 6 redundant places. [2021-10-28 23:57:35,910 INFO L242 Difference]: Finished difference. Result has 127 places, 94 transitions, 765 flow [2021-10-28 23:57:35,911 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=567, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=765, PETRI_PLACES=127, PETRI_TRANSITIONS=94} [2021-10-28 23:57:35,911 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 61 predicate places. [2021-10-28 23:57:35,911 INFO L470 AbstractCegarLoop]: Abstraction has has 127 places, 94 transitions, 765 flow [2021-10-28 23:57:35,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 54.22222222222222) internal successors, (488), 9 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:35,912 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:57:35,912 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:35,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:36,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-28 23:57:36,140 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:57:36,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:36,140 INFO L85 PathProgramCache]: Analyzing trace with hash -2019400091, now seen corresponding path program 4 times [2021-10-28 23:57:36,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:36,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131530587] [2021-10-28 23:57:36,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:36,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:36,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:36,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:36,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:36,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131530587] [2021-10-28 23:57:36,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131530587] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:36,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776241595] [2021-10-28 23:57:36,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:57:36,235 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:36,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:36,247 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:36,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 23:57:36,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:57:36,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:36,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 23:57:36,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:36,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:36,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776241595] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:36,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:57:36,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-10-28 23:57:36,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139395321] [2021-10-28 23:57:36,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:57:36,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:36,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:57:36,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:57:36,534 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 23:57:36,535 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 94 transitions, 765 flow. Second operand has 10 states, 10 states have (on average 54.2) internal successors, (542), 10 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:36,535 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:57:36,535 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 23:57:36,535 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:57:36,845 INFO L129 PetriNetUnfolder]: 58/343 cut-off events. [2021-10-28 23:57:36,845 INFO L130 PetriNetUnfolder]: For 3986/4075 co-relation queries the response was YES. [2021-10-28 23:57:36,849 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1352 conditions, 343 events. 58/343 cut-off events. For 3986/4075 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1641 event pairs, 0 based on Foata normal form. 47/356 useless extension candidates. Maximal degree in co-relation 1287. Up to 76 conditions per place. [2021-10-28 23:57:36,852 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 30 selfloop transitions, 34 changer transitions 17/125 dead transitions. [2021-10-28 23:57:36,853 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 125 transitions, 1651 flow [2021-10-28 23:57:36,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 23:57:36,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-28 23:57:36,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1116 transitions. [2021-10-28 23:57:36,859 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8454545454545455 [2021-10-28 23:57:36,859 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1116 transitions. [2021-10-28 23:57:36,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1116 transitions. [2021-10-28 23:57:36,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:57:36,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1116 transitions. [2021-10-28 23:57:36,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 55.8) internal successors, (1116), 20 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:36,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 66.0) internal successors, (1386), 21 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:36,869 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 66.0) internal successors, (1386), 21 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:36,869 INFO L186 Difference]: Start difference. First operand has 127 places, 94 transitions, 765 flow. Second operand 20 states and 1116 transitions. [2021-10-28 23:57:36,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 125 transitions, 1651 flow [2021-10-28 23:57:36,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 125 transitions, 1431 flow, removed 93 selfloop flow, removed 10 redundant places. [2021-10-28 23:57:36,916 INFO L242 Difference]: Finished difference. Result has 143 places, 103 transitions, 975 flow [2021-10-28 23:57:36,916 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=975, PETRI_PLACES=143, PETRI_TRANSITIONS=103} [2021-10-28 23:57:36,916 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 77 predicate places. [2021-10-28 23:57:36,916 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 103 transitions, 975 flow [2021-10-28 23:57:36,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 54.2) internal successors, (542), 10 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:36,917 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:57:36,917 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:36,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:37,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:37,128 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:57:37,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:37,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1615124285, now seen corresponding path program 1 times [2021-10-28 23:57:37,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:37,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177375903] [2021-10-28 23:57:37,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:37,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:37,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:37,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:37,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177375903] [2021-10-28 23:57:37,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177375903] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:37,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280440616] [2021-10-28 23:57:37,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:37,274 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:37,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:37,275 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:37,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 23:57:37,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:37,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 23:57:37,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:37,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:37,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280440616] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:37,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:57:37,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-10-28 23:57:37,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556380] [2021-10-28 23:57:37,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:57:37,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:37,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:57:37,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:57:37,649 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 23:57:37,650 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 103 transitions, 975 flow. Second operand has 9 states, 9 states have (on average 54.111111111111114) internal successors, (487), 9 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:37,650 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:57:37,650 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 23:57:37,650 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:57:37,820 INFO L129 PetriNetUnfolder]: 54/323 cut-off events. [2021-10-28 23:57:37,820 INFO L130 PetriNetUnfolder]: For 4100/4187 co-relation queries the response was YES. [2021-10-28 23:57:37,823 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1301 conditions, 323 events. 54/323 cut-off events. For 4100/4187 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1506 event pairs, 0 based on Foata normal form. 31/322 useless extension candidates. Maximal degree in co-relation 1228. Up to 70 conditions per place. [2021-10-28 23:57:37,827 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 45 selfloop transitions, 25 changer transitions 8/122 dead transitions. [2021-10-28 23:57:37,827 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 122 transitions, 1613 flow [2021-10-28 23:57:37,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 23:57:37,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-28 23:57:37,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 726 transitions. [2021-10-28 23:57:37,829 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8461538461538461 [2021-10-28 23:57:37,829 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 726 transitions. [2021-10-28 23:57:37,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 726 transitions. [2021-10-28 23:57:37,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:57:37,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 726 transitions. [2021-10-28 23:57:37,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 55.84615384615385) internal successors, (726), 13 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:37,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 66.0) internal successors, (924), 14 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:37,834 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 66.0) internal successors, (924), 14 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:37,834 INFO L186 Difference]: Start difference. First operand has 143 places, 103 transitions, 975 flow. Second operand 13 states and 726 transitions. [2021-10-28 23:57:37,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 122 transitions, 1613 flow [2021-10-28 23:57:37,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 122 transitions, 1374 flow, removed 105 selfloop flow, removed 13 redundant places. [2021-10-28 23:57:37,881 INFO L242 Difference]: Finished difference. Result has 142 places, 105 transitions, 890 flow [2021-10-28 23:57:37,881 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=890, PETRI_PLACES=142, PETRI_TRANSITIONS=105} [2021-10-28 23:57:37,881 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 76 predicate places. [2021-10-28 23:57:37,882 INFO L470 AbstractCegarLoop]: Abstraction has has 142 places, 105 transitions, 890 flow [2021-10-28 23:57:37,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 54.111111111111114) internal successors, (487), 9 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:37,882 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:57:37,882 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:37,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:38,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:38,095 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:57:38,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:38,096 INFO L85 PathProgramCache]: Analyzing trace with hash 70257965, now seen corresponding path program 2 times [2021-10-28 23:57:38,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:38,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808146428] [2021-10-28 23:57:38,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:38,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:38,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:38,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:38,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:38,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808146428] [2021-10-28 23:57:38,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808146428] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:38,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541724140] [2021-10-28 23:57:38,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:57:38,200 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:38,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:38,201 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:38,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 23:57:38,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:57:38,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:38,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 23:57:38,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:38,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:38,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541724140] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:38,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:57:38,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-10-28 23:57:38,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712773602] [2021-10-28 23:57:38,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:57:38,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:38,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:57:38,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:57:38,557 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 23:57:38,558 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 105 transitions, 890 flow. Second operand has 9 states, 9 states have (on average 54.111111111111114) internal successors, (487), 9 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:38,558 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:57:38,558 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 23:57:38,558 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:57:38,775 INFO L129 PetriNetUnfolder]: 69/418 cut-off events. [2021-10-28 23:57:38,776 INFO L130 PetriNetUnfolder]: For 5788/5870 co-relation queries the response was YES. [2021-10-28 23:57:38,780 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1695 conditions, 418 events. 69/418 cut-off events. For 5788/5870 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2172 event pairs, 0 based on Foata normal form. 36/414 useless extension candidates. Maximal degree in co-relation 1621. Up to 78 conditions per place. [2021-10-28 23:57:38,785 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 36 selfloop transitions, 45 changer transitions 8/133 dead transitions. [2021-10-28 23:57:38,785 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 133 transitions, 1808 flow [2021-10-28 23:57:38,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 23:57:38,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-28 23:57:38,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 895 transitions. [2021-10-28 23:57:38,788 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8475378787878788 [2021-10-28 23:57:38,788 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 895 transitions. [2021-10-28 23:57:38,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 895 transitions. [2021-10-28 23:57:38,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:57:38,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 895 transitions. [2021-10-28 23:57:38,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 55.9375) internal successors, (895), 16 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:38,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 66.0) internal successors, (1122), 17 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:38,825 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 66.0) internal successors, (1122), 17 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:38,826 INFO L186 Difference]: Start difference. First operand has 142 places, 105 transitions, 890 flow. Second operand 16 states and 895 transitions. [2021-10-28 23:57:38,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 133 transitions, 1808 flow [2021-10-28 23:57:38,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 133 transitions, 1634 flow, removed 66 selfloop flow, removed 10 redundant places. [2021-10-28 23:57:38,854 INFO L242 Difference]: Finished difference. Result has 151 places, 111 transitions, 1097 flow [2021-10-28 23:57:38,854 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1097, PETRI_PLACES=151, PETRI_TRANSITIONS=111} [2021-10-28 23:57:38,855 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 85 predicate places. [2021-10-28 23:57:38,855 INFO L470 AbstractCegarLoop]: Abstraction has has 151 places, 111 transitions, 1097 flow [2021-10-28 23:57:38,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 54.111111111111114) internal successors, (487), 9 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:38,856 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:57:38,856 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:38,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:39,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-28 23:57:39,072 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:57:39,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:39,073 INFO L85 PathProgramCache]: Analyzing trace with hash -245613985, now seen corresponding path program 3 times [2021-10-28 23:57:39,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:39,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403185214] [2021-10-28 23:57:39,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:39,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:39,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:39,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:39,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:39,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403185214] [2021-10-28 23:57:39,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403185214] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:39,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954099544] [2021-10-28 23:57:39,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:57:39,157 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:39,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:39,164 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:39,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 23:57:39,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 23:57:39,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:39,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 23:57:39,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:39,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:39,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954099544] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:39,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:57:39,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-10-28 23:57:39,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840682883] [2021-10-28 23:57:39,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:57:39,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:39,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:57:39,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:57:39,513 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 23:57:39,514 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 111 transitions, 1097 flow. Second operand has 10 states, 10 states have (on average 54.2) internal successors, (542), 10 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:39,514 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:57:39,514 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 23:57:39,514 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:57:39,834 INFO L129 PetriNetUnfolder]: 64/390 cut-off events. [2021-10-28 23:57:39,834 INFO L130 PetriNetUnfolder]: For 6648/6766 co-relation queries the response was YES. [2021-10-28 23:57:39,838 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1682 conditions, 390 events. 64/390 cut-off events. For 6648/6766 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2002 event pairs, 0 based on Foata normal form. 50/402 useless extension candidates. Maximal degree in co-relation 1604. Up to 74 conditions per place. [2021-10-28 23:57:39,843 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 28 selfloop transitions, 53 changer transitions 11/136 dead transitions. [2021-10-28 23:57:39,844 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 136 transitions, 2053 flow [2021-10-28 23:57:39,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 23:57:39,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-28 23:57:39,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1003 transitions. [2021-10-28 23:57:39,847 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8442760942760943 [2021-10-28 23:57:39,847 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1003 transitions. [2021-10-28 23:57:39,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1003 transitions. [2021-10-28 23:57:39,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:57:39,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1003 transitions. [2021-10-28 23:57:39,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 55.72222222222222) internal successors, (1003), 18 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:39,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 66.0) internal successors, (1254), 19 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:39,856 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 66.0) internal successors, (1254), 19 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:39,856 INFO L186 Difference]: Start difference. First operand has 151 places, 111 transitions, 1097 flow. Second operand 18 states and 1003 transitions. [2021-10-28 23:57:39,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 136 transitions, 2053 flow [2021-10-28 23:57:39,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 136 transitions, 1794 flow, removed 101 selfloop flow, removed 11 redundant places. [2021-10-28 23:57:39,890 INFO L242 Difference]: Finished difference. Result has 160 places, 114 transitions, 1183 flow [2021-10-28 23:57:39,891 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1183, PETRI_PLACES=160, PETRI_TRANSITIONS=114} [2021-10-28 23:57:39,891 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 94 predicate places. [2021-10-28 23:57:39,891 INFO L470 AbstractCegarLoop]: Abstraction has has 160 places, 114 transitions, 1183 flow [2021-10-28 23:57:39,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 54.2) internal successors, (542), 10 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:39,892 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:57:39,892 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1] [2021-10-28 23:57:39,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:40,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-28 23:57:40,115 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:57:40,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:40,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1609128234, now seen corresponding path program 4 times [2021-10-28 23:57:40,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:40,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076223977] [2021-10-28 23:57:40,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:40,116 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:40,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:40,239 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:40,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:40,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076223977] [2021-10-28 23:57:40,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076223977] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:40,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625905712] [2021-10-28 23:57:40,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:57:40,240 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:40,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:40,244 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:40,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 23:57:40,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:57:40,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:40,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 23:57:40,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:40,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:40,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625905712] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:40,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:57:40,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-10-28 23:57:40,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597388469] [2021-10-28 23:57:40,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 23:57:40,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:40,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 23:57:40,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:57:40,751 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 23:57:40,752 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 114 transitions, 1183 flow. Second operand has 11 states, 11 states have (on average 54.18181818181818) internal successors, (596), 11 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:40,752 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:57:40,753 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 23:57:40,753 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:57:40,938 INFO L129 PetriNetUnfolder]: 64/404 cut-off events. [2021-10-28 23:57:40,938 INFO L130 PetriNetUnfolder]: For 6256/6339 co-relation queries the response was YES. [2021-10-28 23:57:40,956 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1697 conditions, 404 events. 64/404 cut-off events. For 6256/6339 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2053 event pairs, 0 based on Foata normal form. 35/399 useless extension candidates. Maximal degree in co-relation 1616. Up to 87 conditions per place. [2021-10-28 23:57:40,961 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 63 selfloop transitions, 15 changer transitions 8/130 dead transitions. [2021-10-28 23:57:40,961 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 130 transitions, 1837 flow [2021-10-28 23:57:40,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 23:57:40,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-28 23:57:40,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 725 transitions. [2021-10-28 23:57:40,963 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.844988344988345 [2021-10-28 23:57:40,964 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 725 transitions. [2021-10-28 23:57:40,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 725 transitions. [2021-10-28 23:57:40,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:57:40,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 725 transitions. [2021-10-28 23:57:40,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 55.76923076923077) internal successors, (725), 13 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:40,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 66.0) internal successors, (924), 14 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:40,968 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 66.0) internal successors, (924), 14 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:40,969 INFO L186 Difference]: Start difference. First operand has 160 places, 114 transitions, 1183 flow. Second operand 13 states and 725 transitions. [2021-10-28 23:57:40,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 130 transitions, 1837 flow [2021-10-28 23:57:40,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 130 transitions, 1629 flow, removed 51 selfloop flow, removed 18 redundant places. [2021-10-28 23:57:41,001 INFO L242 Difference]: Finished difference. Result has 156 places, 116 transitions, 1121 flow [2021-10-28 23:57:41,002 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1007, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1121, PETRI_PLACES=156, PETRI_TRANSITIONS=116} [2021-10-28 23:57:41,002 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 90 predicate places. [2021-10-28 23:57:41,002 INFO L470 AbstractCegarLoop]: Abstraction has has 156 places, 116 transitions, 1121 flow [2021-10-28 23:57:41,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 54.18181818181818) internal successors, (596), 11 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:41,003 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:57:41,003 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1] [2021-10-28 23:57:41,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:41,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-28 23:57:41,223 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:57:41,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:41,224 INFO L85 PathProgramCache]: Analyzing trace with hash 378278894, now seen corresponding path program 5 times [2021-10-28 23:57:41,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:41,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079304937] [2021-10-28 23:57:41,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:41,225 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:41,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:41,341 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:41,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:41,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079304937] [2021-10-28 23:57:41,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079304937] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:41,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551070174] [2021-10-28 23:57:41,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:57:41,343 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:41,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:41,344 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:41,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 23:57:41,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-28 23:57:41,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:41,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 23:57:41,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:41,849 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:41,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551070174] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:41,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:57:41,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-10-28 23:57:41,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517084120] [2021-10-28 23:57:41,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 23:57:41,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:41,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 23:57:41,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:57:41,853 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 23:57:41,854 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 116 transitions, 1121 flow. Second operand has 12 states, 12 states have (on average 54.25) internal successors, (651), 12 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:41,854 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:57:41,854 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 23:57:41,854 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:57:42,098 INFO L129 PetriNetUnfolder]: 66/408 cut-off events. [2021-10-28 23:57:42,098 INFO L130 PetriNetUnfolder]: For 7029/7131 co-relation queries the response was YES. [2021-10-28 23:57:42,103 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1745 conditions, 408 events. 66/408 cut-off events. For 7029/7131 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2119 event pairs, 0 based on Foata normal form. 37/404 useless extension candidates. Maximal degree in co-relation 1666. Up to 76 conditions per place. [2021-10-28 23:57:42,107 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 56 selfloop transitions, 25 changer transitions 8/133 dead transitions. [2021-10-28 23:57:42,108 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 133 transitions, 1839 flow [2021-10-28 23:57:42,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 23:57:42,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-28 23:57:42,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 892 transitions. [2021-10-28 23:57:42,110 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8446969696969697 [2021-10-28 23:57:42,110 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 892 transitions. [2021-10-28 23:57:42,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 892 transitions. [2021-10-28 23:57:42,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:57:42,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 892 transitions. [2021-10-28 23:57:42,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 55.75) internal successors, (892), 16 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:42,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 66.0) internal successors, (1122), 17 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:42,116 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 66.0) internal successors, (1122), 17 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:42,116 INFO L186 Difference]: Start difference. First operand has 156 places, 116 transitions, 1121 flow. Second operand 16 states and 892 transitions. [2021-10-28 23:57:42,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 133 transitions, 1839 flow [2021-10-28 23:57:42,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 133 transitions, 1631 flow, removed 91 selfloop flow, removed 10 redundant places. [2021-10-28 23:57:42,146 INFO L242 Difference]: Finished difference. Result has 163 places, 118 transitions, 1153 flow [2021-10-28 23:57:42,147 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1021, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1153, PETRI_PLACES=163, PETRI_TRANSITIONS=118} [2021-10-28 23:57:42,147 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 97 predicate places. [2021-10-28 23:57:42,147 INFO L470 AbstractCegarLoop]: Abstraction has has 163 places, 118 transitions, 1153 flow [2021-10-28 23:57:42,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.25) internal successors, (651), 12 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:42,148 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:57:42,148 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1] [2021-10-28 23:57:42,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:42,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 23:57:42,376 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:57:42,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:42,376 INFO L85 PathProgramCache]: Analyzing trace with hash 25133018, now seen corresponding path program 6 times [2021-10-28 23:57:42,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:42,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525750018] [2021-10-28 23:57:42,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:42,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:42,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:42,483 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:42,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:42,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525750018] [2021-10-28 23:57:42,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525750018] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:42,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998214689] [2021-10-28 23:57:42,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:57:42,484 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:42,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:42,485 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:42,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 23:57:42,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-28 23:57:42,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:42,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 23:57:42,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:42,959 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:42,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998214689] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:42,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:57:42,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-10-28 23:57:42,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248637625] [2021-10-28 23:57:42,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 23:57:42,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:42,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 23:57:42,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:57:42,963 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 23:57:42,964 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 118 transitions, 1153 flow. Second operand has 11 states, 11 states have (on average 54.18181818181818) internal successors, (596), 11 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:42,964 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:57:42,964 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 23:57:42,964 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:57:43,199 INFO L129 PetriNetUnfolder]: 68/433 cut-off events. [2021-10-28 23:57:43,200 INFO L130 PetriNetUnfolder]: For 6313/6393 co-relation queries the response was YES. [2021-10-28 23:57:43,204 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1759 conditions, 433 events. 68/433 cut-off events. For 6313/6393 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2311 event pairs, 0 based on Foata normal form. 40/429 useless extension candidates. Maximal degree in co-relation 1678. Up to 80 conditions per place. [2021-10-28 23:57:43,209 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 50 selfloop transitions, 32 changer transitions 8/134 dead transitions. [2021-10-28 23:57:43,209 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 134 transitions, 1819 flow [2021-10-28 23:57:43,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 23:57:43,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-28 23:57:43,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 948 transitions. [2021-10-28 23:57:43,212 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8449197860962567 [2021-10-28 23:57:43,212 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 948 transitions. [2021-10-28 23:57:43,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 948 transitions. [2021-10-28 23:57:43,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:57:43,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 948 transitions. [2021-10-28 23:57:43,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 55.76470588235294) internal successors, (948), 17 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:43,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 66.0) internal successors, (1188), 18 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:43,218 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 66.0) internal successors, (1188), 18 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:43,219 INFO L186 Difference]: Start difference. First operand has 163 places, 118 transitions, 1153 flow. Second operand 17 states and 948 transitions. [2021-10-28 23:57:43,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 134 transitions, 1819 flow [2021-10-28 23:57:43,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 134 transitions, 1661 flow, removed 58 selfloop flow, removed 13 redundant places. [2021-10-28 23:57:43,249 INFO L242 Difference]: Finished difference. Result has 168 places, 120 transitions, 1205 flow [2021-10-28 23:57:43,250 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1055, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1205, PETRI_PLACES=168, PETRI_TRANSITIONS=120} [2021-10-28 23:57:43,250 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 102 predicate places. [2021-10-28 23:57:43,250 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 120 transitions, 1205 flow [2021-10-28 23:57:43,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 54.18181818181818) internal successors, (596), 11 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:43,251 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:57:43,251 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1] [2021-10-28 23:57:43,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:43,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 23:57:43,468 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:57:43,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:43,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1341298320, now seen corresponding path program 7 times [2021-10-28 23:57:43,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:43,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390386362] [2021-10-28 23:57:43,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:43,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:43,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:43,571 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:43,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:43,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390386362] [2021-10-28 23:57:43,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390386362] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:43,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679820488] [2021-10-28 23:57:43,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:57:43,572 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:43,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:43,576 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:43,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 23:57:43,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:43,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 23:57:43,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:44,056 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:44,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679820488] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:44,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:57:44,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-10-28 23:57:44,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289317011] [2021-10-28 23:57:44,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 23:57:44,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:44,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 23:57:44,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:57:44,060 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 23:57:44,061 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 120 transitions, 1205 flow. Second operand has 12 states, 12 states have (on average 54.25) internal successors, (651), 12 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:44,061 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:57:44,061 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 23:57:44,062 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:57:44,370 INFO L129 PetriNetUnfolder]: 77/492 cut-off events. [2021-10-28 23:57:44,370 INFO L130 PetriNetUnfolder]: For 7370/7456 co-relation queries the response was YES. [2021-10-28 23:57:44,376 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2021 conditions, 492 events. 77/492 cut-off events. For 7370/7456 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2815 event pairs, 0 based on Foata normal form. 43/485 useless extension candidates. Maximal degree in co-relation 1938. Up to 96 conditions per place. [2021-10-28 23:57:44,381 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 41 selfloop transitions, 52 changer transitions 8/145 dead transitions. [2021-10-28 23:57:44,381 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 145 transitions, 2051 flow [2021-10-28 23:57:44,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 23:57:44,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-28 23:57:44,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1057 transitions. [2021-10-28 23:57:44,384 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8429027113237639 [2021-10-28 23:57:44,384 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1057 transitions. [2021-10-28 23:57:44,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1057 transitions. [2021-10-28 23:57:44,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:57:44,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1057 transitions. [2021-10-28 23:57:44,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 55.63157894736842) internal successors, (1057), 19 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:44,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 66.0) internal successors, (1320), 20 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:44,391 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 66.0) internal successors, (1320), 20 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:44,392 INFO L186 Difference]: Start difference. First operand has 168 places, 120 transitions, 1205 flow. Second operand 19 states and 1057 transitions. [2021-10-28 23:57:44,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 145 transitions, 2051 flow [2021-10-28 23:57:44,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 145 transitions, 1881 flow, removed 59 selfloop flow, removed 14 redundant places. [2021-10-28 23:57:44,432 INFO L242 Difference]: Finished difference. Result has 176 places, 130 transitions, 1454 flow [2021-10-28 23:57:44,433 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1103, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1454, PETRI_PLACES=176, PETRI_TRANSITIONS=130} [2021-10-28 23:57:44,433 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 110 predicate places. [2021-10-28 23:57:44,433 INFO L470 AbstractCegarLoop]: Abstraction has has 176 places, 130 transitions, 1454 flow [2021-10-28 23:57:44,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.25) internal successors, (651), 12 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:44,434 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:57:44,434 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1] [2021-10-28 23:57:44,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:44,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:44,659 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:57:44,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:44,660 INFO L85 PathProgramCache]: Analyzing trace with hash -863268282, now seen corresponding path program 8 times [2021-10-28 23:57:44,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:44,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974994231] [2021-10-28 23:57:44,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:44,660 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:44,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:44,750 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:44,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:44,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974994231] [2021-10-28 23:57:44,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974994231] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:44,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26443167] [2021-10-28 23:57:44,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:57:44,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:44,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:44,756 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:44,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 23:57:45,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:57:45,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:45,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 23:57:45,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:45,220 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:45,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26443167] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:45,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:57:45,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-10-28 23:57:45,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852666951] [2021-10-28 23:57:45,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 23:57:45,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:45,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 23:57:45,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:57:45,224 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 23:57:45,225 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 130 transitions, 1454 flow. Second operand has 12 states, 12 states have (on average 54.166666666666664) internal successors, (650), 12 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:45,225 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:57:45,225 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 23:57:45,225 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:57:45,666 INFO L129 PetriNetUnfolder]: 94/577 cut-off events. [2021-10-28 23:57:45,667 INFO L130 PetriNetUnfolder]: For 10181/10302 co-relation queries the response was YES. [2021-10-28 23:57:45,674 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2587 conditions, 577 events. 94/577 cut-off events. For 10181/10302 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3495 event pairs, 0 based on Foata normal form. 51/570 useless extension candidates. Maximal degree in co-relation 2499. Up to 120 conditions per place. [2021-10-28 23:57:45,680 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 40 selfloop transitions, 70 changer transitions 14/168 dead transitions. [2021-10-28 23:57:45,680 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 168 transitions, 2803 flow [2021-10-28 23:57:45,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-28 23:57:45,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-28 23:57:45,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1338 transitions. [2021-10-28 23:57:45,683 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8446969696969697 [2021-10-28 23:57:45,683 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1338 transitions. [2021-10-28 23:57:45,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1338 transitions. [2021-10-28 23:57:45,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:57:45,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1338 transitions. [2021-10-28 23:57:45,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 55.75) internal successors, (1338), 24 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:45,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:45,692 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:45,692 INFO L186 Difference]: Start difference. First operand has 176 places, 130 transitions, 1454 flow. Second operand 24 states and 1338 transitions. [2021-10-28 23:57:45,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 168 transitions, 2803 flow [2021-10-28 23:57:45,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 168 transitions, 2603 flow, removed 81 selfloop flow, removed 12 redundant places. [2021-10-28 23:57:45,737 INFO L242 Difference]: Finished difference. Result has 195 places, 147 transitions, 1980 flow [2021-10-28 23:57:45,737 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1336, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1980, PETRI_PLACES=195, PETRI_TRANSITIONS=147} [2021-10-28 23:57:45,738 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 129 predicate places. [2021-10-28 23:57:45,738 INFO L470 AbstractCegarLoop]: Abstraction has has 195 places, 147 transitions, 1980 flow [2021-10-28 23:57:45,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.166666666666664) internal successors, (650), 12 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:45,739 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:57:45,739 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2021-10-28 23:57:45,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:45,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 23:57:45,967 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:57:45,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:45,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1091792612, now seen corresponding path program 9 times [2021-10-28 23:57:45,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:45,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095250456] [2021-10-28 23:57:45,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:45,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:45,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:46,080 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:46,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:46,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095250456] [2021-10-28 23:57:46,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095250456] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:46,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511717385] [2021-10-28 23:57:46,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:57:46,081 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:46,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:46,084 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:46,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 23:57:46,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 23:57:46,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:46,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 23:57:46,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:46,672 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:46,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511717385] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:46,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:57:46,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-10-28 23:57:46,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628739077] [2021-10-28 23:57:46,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 23:57:46,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:46,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 23:57:46,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:57:46,675 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 23:57:46,676 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 147 transitions, 1980 flow. Second operand has 12 states, 12 states have (on average 54.166666666666664) internal successors, (650), 12 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:46,676 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:57:46,677 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 23:57:46,677 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:57:46,927 INFO L129 PetriNetUnfolder]: 92/582 cut-off events. [2021-10-28 23:57:46,927 INFO L130 PetriNetUnfolder]: For 13798/13923 co-relation queries the response was YES. [2021-10-28 23:57:46,935 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2782 conditions, 582 events. 92/582 cut-off events. For 13798/13923 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3511 event pairs, 0 based on Foata normal form. 33/556 useless extension candidates. Maximal degree in co-relation 2685. Up to 116 conditions per place. [2021-10-28 23:57:46,943 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 86 selfloop transitions, 32 changer transitions 8/170 dead transitions. [2021-10-28 23:57:46,943 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 170 transitions, 2993 flow [2021-10-28 23:57:46,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 23:57:46,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-28 23:57:46,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 836 transitions. [2021-10-28 23:57:46,945 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8444444444444444 [2021-10-28 23:57:46,945 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 836 transitions. [2021-10-28 23:57:46,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 836 transitions. [2021-10-28 23:57:46,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:57:46,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 836 transitions. [2021-10-28 23:57:46,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 55.733333333333334) internal successors, (836), 15 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:46,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 66.0) internal successors, (1056), 16 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:46,951 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 66.0) internal successors, (1056), 16 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:46,951 INFO L186 Difference]: Start difference. First operand has 195 places, 147 transitions, 1980 flow. Second operand 15 states and 836 transitions. [2021-10-28 23:57:46,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 170 transitions, 2993 flow [2021-10-28 23:57:47,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 170 transitions, 2424 flow, removed 240 selfloop flow, removed 20 redundant places. [2021-10-28 23:57:47,009 INFO L242 Difference]: Finished difference. Result has 189 places, 149 transitions, 1707 flow [2021-10-28 23:57:47,009 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1551, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1707, PETRI_PLACES=189, PETRI_TRANSITIONS=149} [2021-10-28 23:57:47,010 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 123 predicate places. [2021-10-28 23:57:47,010 INFO L470 AbstractCegarLoop]: Abstraction has has 189 places, 149 transitions, 1707 flow [2021-10-28 23:57:47,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.166666666666664) internal successors, (650), 12 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:47,010 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:57:47,011 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2021-10-28 23:57:47,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:47,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:47,219 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:57:47,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:47,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1907855234, now seen corresponding path program 10 times [2021-10-28 23:57:47,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:47,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294066598] [2021-10-28 23:57:47,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:47,220 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:47,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:47,321 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:47,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:47,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294066598] [2021-10-28 23:57:47,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294066598] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:47,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246396171] [2021-10-28 23:57:47,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:57:47,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:47,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:47,322 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:47,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 23:57:47,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:57:47,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:47,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 23:57:47,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:47,907 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:47,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246396171] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:47,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:57:47,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-10-28 23:57:47,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696011238] [2021-10-28 23:57:47,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 23:57:47,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:47,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 23:57:47,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:57:47,910 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 23:57:47,911 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 149 transitions, 1707 flow. Second operand has 12 states, 12 states have (on average 54.166666666666664) internal successors, (650), 12 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:47,911 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:57:47,911 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 23:57:47,911 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:57:48,167 INFO L129 PetriNetUnfolder]: 94/607 cut-off events. [2021-10-28 23:57:48,167 INFO L130 PetriNetUnfolder]: For 11129/11238 co-relation queries the response was YES. [2021-10-28 23:57:48,176 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2571 conditions, 607 events. 94/607 cut-off events. For 11129/11238 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3718 event pairs, 0 based on Foata normal form. 43/589 useless extension candidates. Maximal degree in co-relation 2477. Up to 108 conditions per place. [2021-10-28 23:57:48,182 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 60 selfloop transitions, 63 changer transitions 8/175 dead transitions. [2021-10-28 23:57:48,182 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 175 transitions, 2737 flow [2021-10-28 23:57:48,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 23:57:48,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-28 23:57:48,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1001 transitions. [2021-10-28 23:57:48,185 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8425925925925926 [2021-10-28 23:57:48,185 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1001 transitions. [2021-10-28 23:57:48,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1001 transitions. [2021-10-28 23:57:48,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:57:48,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1001 transitions. [2021-10-28 23:57:48,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 55.611111111111114) internal successors, (1001), 18 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:48,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 66.0) internal successors, (1254), 19 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:48,192 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 66.0) internal successors, (1254), 19 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:48,192 INFO L186 Difference]: Start difference. First operand has 189 places, 149 transitions, 1707 flow. Second operand 18 states and 1001 transitions. [2021-10-28 23:57:48,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 175 transitions, 2737 flow [2021-10-28 23:57:48,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 175 transitions, 2569 flow, removed 56 selfloop flow, removed 12 redundant places. [2021-10-28 23:57:48,241 INFO L242 Difference]: Finished difference. Result has 196 places, 151 transitions, 1829 flow [2021-10-28 23:57:48,242 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1597, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1829, PETRI_PLACES=196, PETRI_TRANSITIONS=151} [2021-10-28 23:57:48,242 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 130 predicate places. [2021-10-28 23:57:48,242 INFO L470 AbstractCegarLoop]: Abstraction has has 196 places, 151 transitions, 1829 flow [2021-10-28 23:57:48,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.166666666666664) internal successors, (650), 12 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:48,243 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:57:48,243 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2021-10-28 23:57:48,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:48,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:48,448 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:57:48,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:48,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1754475826, now seen corresponding path program 11 times [2021-10-28 23:57:48,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:48,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55730224] [2021-10-28 23:57:48,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:48,448 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:48,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:48,544 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:48,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:48,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55730224] [2021-10-28 23:57:48,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55730224] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:48,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429969552] [2021-10-28 23:57:48,545 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:57:48,545 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:48,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:48,546 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:48,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 23:57:48,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-28 23:57:48,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:48,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 23:57:48,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:49,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429969552] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:49,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:57:49,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-10-28 23:57:49,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028841559] [2021-10-28 23:57:49,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 23:57:49,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:49,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 23:57:49,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:57:49,111 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 23:57:49,112 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 151 transitions, 1829 flow. Second operand has 13 states, 13 states have (on average 54.23076923076923) internal successors, (705), 13 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:49,112 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:57:49,112 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 23:57:49,112 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:57:49,476 INFO L129 PetriNetUnfolder]: 97/620 cut-off events. [2021-10-28 23:57:49,477 INFO L130 PetriNetUnfolder]: For 11991/12114 co-relation queries the response was YES. [2021-10-28 23:57:49,484 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2729 conditions, 620 events. 97/620 cut-off events. For 11991/12114 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 3833 event pairs, 0 based on Foata normal form. 54/612 useless extension candidates. Maximal degree in co-relation 2633. Up to 114 conditions per place. [2021-10-28 23:57:49,491 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 45 selfloop transitions, 83 changer transitions 8/180 dead transitions. [2021-10-28 23:57:49,491 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 180 transitions, 2989 flow [2021-10-28 23:57:49,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 23:57:49,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-28 23:57:49,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1168 transitions. [2021-10-28 23:57:49,494 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8427128427128427 [2021-10-28 23:57:49,495 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1168 transitions. [2021-10-28 23:57:49,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1168 transitions. [2021-10-28 23:57:49,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:57:49,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1168 transitions. [2021-10-28 23:57:49,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 55.61904761904762) internal successors, (1168), 21 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:49,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 66.0) internal successors, (1452), 22 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:49,501 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 66.0) internal successors, (1452), 22 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:49,502 INFO L186 Difference]: Start difference. First operand has 196 places, 151 transitions, 1829 flow. Second operand 21 states and 1168 transitions. [2021-10-28 23:57:49,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 180 transitions, 2989 flow [2021-10-28 23:57:49,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 180 transitions, 2743 flow, removed 70 selfloop flow, removed 15 redundant places. [2021-10-28 23:57:49,556 INFO L242 Difference]: Finished difference. Result has 204 places, 156 transitions, 2025 flow [2021-10-28 23:57:49,557 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1667, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2025, PETRI_PLACES=204, PETRI_TRANSITIONS=156} [2021-10-28 23:57:49,557 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 138 predicate places. [2021-10-28 23:57:49,557 INFO L470 AbstractCegarLoop]: Abstraction has has 204 places, 156 transitions, 2025 flow [2021-10-28 23:57:49,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.23076923076923) internal successors, (705), 13 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:49,558 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:57:49,558 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2021-10-28 23:57:49,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:49,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-28 23:57:49,783 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:57:49,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:49,784 INFO L85 PathProgramCache]: Analyzing trace with hash 335924868, now seen corresponding path program 12 times [2021-10-28 23:57:49,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:49,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417709533] [2021-10-28 23:57:49,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:49,784 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:49,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:49,876 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:49,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:49,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417709533] [2021-10-28 23:57:49,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417709533] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:49,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862048502] [2021-10-28 23:57:49,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:57:49,877 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:49,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:49,878 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:49,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 23:57:50,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-28 23:57:50,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:50,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 23:57:50,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:50,504 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:50,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862048502] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:50,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:57:50,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-10-28 23:57:50,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630444526] [2021-10-28 23:57:50,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 23:57:50,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:50,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 23:57:50,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:57:50,509 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 23:57:50,510 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 156 transitions, 2025 flow. Second operand has 13 states, 13 states have (on average 54.15384615384615) internal successors, (704), 13 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:50,510 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:57:50,510 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 23:57:50,511 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:57:50,971 INFO L129 PetriNetUnfolder]: 109/689 cut-off events. [2021-10-28 23:57:50,971 INFO L130 PetriNetUnfolder]: For 15371/15481 co-relation queries the response was YES. [2021-10-28 23:57:50,980 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3234 conditions, 689 events. 109/689 cut-off events. For 15371/15481 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 4322 event pairs, 0 based on Foata normal form. 69/690 useless extension candidates. Maximal degree in co-relation 3135. Up to 130 conditions per place. [2021-10-28 23:57:50,987 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 39 selfloop transitions, 100 changer transitions 14/197 dead transitions. [2021-10-28 23:57:50,987 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 197 transitions, 3746 flow [2021-10-28 23:57:50,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 23:57:50,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-10-28 23:57:50,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1449 transitions. [2021-10-28 23:57:50,991 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8444055944055944 [2021-10-28 23:57:50,991 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1449 transitions. [2021-10-28 23:57:50,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1449 transitions. [2021-10-28 23:57:50,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:57:50,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1449 transitions. [2021-10-28 23:57:50,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 55.73076923076923) internal successors, (1449), 26 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:50,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 66.0) internal successors, (1782), 27 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:50,999 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 66.0) internal successors, (1782), 27 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:50,999 INFO L186 Difference]: Start difference. First operand has 204 places, 156 transitions, 2025 flow. Second operand 26 states and 1449 transitions. [2021-10-28 23:57:51,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 197 transitions, 3746 flow [2021-10-28 23:57:51,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 197 transitions, 3424 flow, removed 96 selfloop flow, removed 17 redundant places. [2021-10-28 23:57:51,072 INFO L242 Difference]: Finished difference. Result has 220 places, 168 transitions, 2440 flow [2021-10-28 23:57:51,072 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1797, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2440, PETRI_PLACES=220, PETRI_TRANSITIONS=168} [2021-10-28 23:57:51,072 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 154 predicate places. [2021-10-28 23:57:51,073 INFO L470 AbstractCegarLoop]: Abstraction has has 220 places, 168 transitions, 2440 flow [2021-10-28 23:57:51,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.15384615384615) internal successors, (704), 13 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:51,073 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:57:51,073 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:51,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:51,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:51,287 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:57:51,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:51,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1777423792, now seen corresponding path program 13 times [2021-10-28 23:57:51,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:51,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598691228] [2021-10-28 23:57:51,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:51,288 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:51,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:51,398 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 23:57:51,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:51,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598691228] [2021-10-28 23:57:51,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598691228] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:51,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043204872] [2021-10-28 23:57:51,399 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:57:51,399 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:51,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:51,404 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:51,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 23:57:51,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:51,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 23:57:51,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:52,108 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 23:57:52,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043204872] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:52,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:57:52,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-10-28 23:57:52,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7137526] [2021-10-28 23:57:52,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 23:57:52,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:52,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 23:57:52,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:57:52,112 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 23:57:52,113 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 168 transitions, 2440 flow. Second operand has 13 states, 13 states have (on average 54.23076923076923) internal successors, (705), 13 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:52,113 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:57:52,113 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 23:57:52,113 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:57:52,564 INFO L129 PetriNetUnfolder]: 122/762 cut-off events. [2021-10-28 23:57:52,564 INFO L130 PetriNetUnfolder]: For 26429/26580 co-relation queries the response was YES. [2021-10-28 23:57:52,572 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4068 conditions, 762 events. 122/762 cut-off events. For 26429/26580 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 5001 event pairs, 0 based on Foata normal form. 77/764 useless extension candidates. Maximal degree in co-relation 3961. Up to 148 conditions per place. [2021-10-28 23:57:52,581 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 61 selfloop transitions, 89 changer transitions 11/205 dead transitions. [2021-10-28 23:57:52,582 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 205 transitions, 4207 flow [2021-10-28 23:57:52,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-28 23:57:52,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-28 23:57:52,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1337 transitions. [2021-10-28 23:57:52,585 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8440656565656566 [2021-10-28 23:57:52,585 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1337 transitions. [2021-10-28 23:57:52,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1337 transitions. [2021-10-28 23:57:52,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:57:52,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1337 transitions. [2021-10-28 23:57:52,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 55.708333333333336) internal successors, (1337), 24 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:52,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:52,593 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:52,593 INFO L186 Difference]: Start difference. First operand has 220 places, 168 transitions, 2440 flow. Second operand 24 states and 1337 transitions. [2021-10-28 23:57:52,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 205 transitions, 4207 flow [2021-10-28 23:57:52,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 205 transitions, 3716 flow, removed 181 selfloop flow, removed 17 redundant places. [2021-10-28 23:57:52,685 INFO L242 Difference]: Finished difference. Result has 229 places, 186 transitions, 2825 flow [2021-10-28 23:57:52,685 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2056, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2825, PETRI_PLACES=229, PETRI_TRANSITIONS=186} [2021-10-28 23:57:52,685 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 163 predicate places. [2021-10-28 23:57:52,685 INFO L470 AbstractCegarLoop]: Abstraction has has 229 places, 186 transitions, 2825 flow [2021-10-28 23:57:52,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.23076923076923) internal successors, (705), 13 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:52,686 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:57:52,686 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:52,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-10-28 23:57:52,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:52,907 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:57:52,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:52,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1801962500, now seen corresponding path program 14 times [2021-10-28 23:57:52,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:52,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788450809] [2021-10-28 23:57:52,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:52,908 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:52,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:53,012 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 23:57:53,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:53,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788450809] [2021-10-28 23:57:53,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788450809] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:53,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087411582] [2021-10-28 23:57:53,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:57:53,013 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:53,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:53,024 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:53,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 23:57:53,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:57:53,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:53,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 23:57:53,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:53,793 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 23:57:53,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087411582] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:53,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:57:53,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-10-28 23:57:53,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688696367] [2021-10-28 23:57:53,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 23:57:53,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:53,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 23:57:53,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-10-28 23:57:53,796 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 23:57:53,797 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 186 transitions, 2825 flow. Second operand has 14 states, 14 states have (on average 54.214285714285715) internal successors, (759), 14 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:53,797 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:57:53,797 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 23:57:53,797 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:57:54,281 INFO L129 PetriNetUnfolder]: 129/816 cut-off events. [2021-10-28 23:57:54,282 INFO L130 PetriNetUnfolder]: For 29326/29457 co-relation queries the response was YES. [2021-10-28 23:57:54,293 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4363 conditions, 816 events. 129/816 cut-off events. For 29326/29457 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 5364 event pairs, 0 based on Foata normal form. 78/813 useless extension candidates. Maximal degree in co-relation 4251. Up to 154 conditions per place. [2021-10-28 23:57:54,311 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 49 selfloop transitions, 120 changer transitions 11/224 dead transitions. [2021-10-28 23:57:54,311 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 224 transitions, 4867 flow [2021-10-28 23:57:54,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-28 23:57:54,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-28 23:57:54,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1337 transitions. [2021-10-28 23:57:54,316 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8440656565656566 [2021-10-28 23:57:54,316 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1337 transitions. [2021-10-28 23:57:54,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1337 transitions. [2021-10-28 23:57:54,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:57:54,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1337 transitions. [2021-10-28 23:57:54,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 55.708333333333336) internal successors, (1337), 24 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:54,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:54,323 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:54,323 INFO L186 Difference]: Start difference. First operand has 229 places, 186 transitions, 2825 flow. Second operand 24 states and 1337 transitions. [2021-10-28 23:57:54,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 224 transitions, 4867 flow [2021-10-28 23:57:54,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 224 transitions, 4201 flow, removed 275 selfloop flow, removed 22 redundant places. [2021-10-28 23:57:54,421 INFO L242 Difference]: Finished difference. Result has 235 places, 197 transitions, 3092 flow [2021-10-28 23:57:54,421 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2399, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3092, PETRI_PLACES=235, PETRI_TRANSITIONS=197} [2021-10-28 23:57:54,421 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 169 predicate places. [2021-10-28 23:57:54,421 INFO L470 AbstractCegarLoop]: Abstraction has has 235 places, 197 transitions, 3092 flow [2021-10-28 23:57:54,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 54.214285714285715) internal successors, (759), 14 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:54,422 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:57:54,422 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:54,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:54,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-28 23:57:54,622 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:57:54,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:54,623 INFO L85 PathProgramCache]: Analyzing trace with hash 910431551, now seen corresponding path program 15 times [2021-10-28 23:57:54,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:54,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548317356] [2021-10-28 23:57:54,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:54,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:54,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:54,765 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:54,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:54,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548317356] [2021-10-28 23:57:54,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548317356] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:54,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754644306] [2021-10-28 23:57:54,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:57:54,766 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:54,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:54,767 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:54,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 23:57:55,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 23:57:55,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:55,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-28 23:57:55,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:55,541 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:55,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754644306] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:55,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:57:55,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-10-28 23:57:55,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747754803] [2021-10-28 23:57:55,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 23:57:55,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:55,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 23:57:55,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:57:55,544 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 23:57:55,545 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 197 transitions, 3092 flow. Second operand has 15 states, 15 states have (on average 54.13333333333333) internal successors, (812), 15 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:55,545 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:57:55,545 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 23:57:55,545 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:57:56,231 INFO L129 PetriNetUnfolder]: 151/946 cut-off events. [2021-10-28 23:57:56,232 INFO L130 PetriNetUnfolder]: For 37811/37978 co-relation queries the response was YES. [2021-10-28 23:57:56,243 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5340 conditions, 946 events. 151/946 cut-off events. For 37811/37978 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 6360 event pairs, 0 based on Foata normal form. 83/934 useless extension candidates. Maximal degree in co-relation 5227. Up to 178 conditions per place. [2021-10-28 23:57:56,264 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 68 selfloop transitions, 119 changer transitions 14/245 dead transitions. [2021-10-28 23:57:56,264 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 245 transitions, 5657 flow [2021-10-28 23:57:56,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-28 23:57:56,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-10-28 23:57:56,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1616 transitions. [2021-10-28 23:57:56,273 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8443051201671892 [2021-10-28 23:57:56,273 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1616 transitions. [2021-10-28 23:57:56,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1616 transitions. [2021-10-28 23:57:56,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:57:56,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1616 transitions. [2021-10-28 23:57:56,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.724137931034484) internal successors, (1616), 29 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:56,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:56,287 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:56,287 INFO L186 Difference]: Start difference. First operand has 235 places, 197 transitions, 3092 flow. Second operand 29 states and 1616 transitions. [2021-10-28 23:57:56,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 245 transitions, 5657 flow [2021-10-28 23:57:56,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 245 transitions, 5112 flow, removed 190 selfloop flow, removed 17 redundant places. [2021-10-28 23:57:56,394 INFO L242 Difference]: Finished difference. Result has 253 places, 221 transitions, 3895 flow [2021-10-28 23:57:56,395 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2668, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3895, PETRI_PLACES=253, PETRI_TRANSITIONS=221} [2021-10-28 23:57:56,395 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 187 predicate places. [2021-10-28 23:57:56,395 INFO L470 AbstractCegarLoop]: Abstraction has has 253 places, 221 transitions, 3895 flow [2021-10-28 23:57:56,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 54.13333333333333) internal successors, (812), 15 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:56,395 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:57:56,395 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:56,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:56,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-28 23:57:56,597 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:57:56,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:56,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1848776937, now seen corresponding path program 16 times [2021-10-28 23:57:56,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:56,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289873801] [2021-10-28 23:57:56,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:56,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:56,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:56,712 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:56,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:56,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289873801] [2021-10-28 23:57:56,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289873801] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:56,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279587166] [2021-10-28 23:57:56,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:57:56,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:56,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:56,715 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:56,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 23:57:57,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:57:57,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:57,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 23:57:57,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:57,463 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:57,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279587166] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:57,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:57:57,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-10-28 23:57:57,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102521582] [2021-10-28 23:57:57,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 23:57:57,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:57,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 23:57:57,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-10-28 23:57:57,467 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 23:57:57,468 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 221 transitions, 3895 flow. Second operand has 16 states, 16 states have (on average 54.125) internal successors, (866), 16 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:57,468 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:57:57,468 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 23:57:57,469 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:57:58,138 INFO L129 PetriNetUnfolder]: 161/1005 cut-off events. [2021-10-28 23:57:58,138 INFO L130 PetriNetUnfolder]: For 50082/50280 co-relation queries the response was YES. [2021-10-28 23:57:58,152 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6065 conditions, 1005 events. 161/1005 cut-off events. For 50082/50280 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 6761 event pairs, 0 based on Foata normal form. 83/988 useless extension candidates. Maximal degree in co-relation 5944. Up to 188 conditions per place. [2021-10-28 23:57:58,170 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 61 selfloop transitions, 150 changer transitions 14/269 dead transitions. [2021-10-28 23:57:58,171 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 269 transitions, 6877 flow [2021-10-28 23:57:58,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-28 23:57:58,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-10-28 23:57:58,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1616 transitions. [2021-10-28 23:57:58,174 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8443051201671892 [2021-10-28 23:57:58,174 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1616 transitions. [2021-10-28 23:57:58,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1616 transitions. [2021-10-28 23:57:58,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:57:58,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1616 transitions. [2021-10-28 23:57:58,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.724137931034484) internal successors, (1616), 29 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:58,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:58,181 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 66.0) internal successors, (1980), 30 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:58,181 INFO L186 Difference]: Start difference. First operand has 253 places, 221 transitions, 3895 flow. Second operand 29 states and 1616 transitions. [2021-10-28 23:57:58,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 269 transitions, 6877 flow [2021-10-28 23:57:58,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 269 transitions, 5783 flow, removed 480 selfloop flow, removed 23 redundant places. [2021-10-28 23:57:58,320 INFO L242 Difference]: Finished difference. Result has 265 places, 235 transitions, 4128 flow [2021-10-28 23:57:58,321 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3159, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=4128, PETRI_PLACES=265, PETRI_TRANSITIONS=235} [2021-10-28 23:57:58,321 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 199 predicate places. [2021-10-28 23:57:58,321 INFO L470 AbstractCegarLoop]: Abstraction has has 265 places, 235 transitions, 4128 flow [2021-10-28 23:57:58,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.125) internal successors, (866), 16 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:58,331 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:57:58,332 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:57:58,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-28 23:57:58,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:58,547 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:57:58,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:57:58,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1430628198, now seen corresponding path program 17 times [2021-10-28 23:57:58,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:57:58,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64479990] [2021-10-28 23:57:58,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:57:58,548 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:57:58,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:57:58,674 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:58,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:57:58,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64479990] [2021-10-28 23:57:58,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64479990] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:58,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718077149] [2021-10-28 23:57:58,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:57:58,676 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:57:58,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:57:58,677 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:57:58,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-28 23:57:59,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-28 23:57:59,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:57:59,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-28 23:57:59,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:57:59,418 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:57:59,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718077149] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:57:59,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:57:59,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-10-28 23:57:59,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999677792] [2021-10-28 23:57:59,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-28 23:57:59,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:57:59,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-28 23:57:59,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-10-28 23:57:59,420 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 66 [2021-10-28 23:57:59,421 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 235 transitions, 4128 flow. Second operand has 17 states, 17 states have (on average 54.11764705882353) internal successors, (920), 17 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:57:59,421 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:57:59,421 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 66 [2021-10-28 23:57:59,421 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:58:00,129 INFO L129 PetriNetUnfolder]: 171/1071 cut-off events. [2021-10-28 23:58:00,129 INFO L130 PetriNetUnfolder]: For 62041/62243 co-relation queries the response was YES. [2021-10-28 23:58:00,143 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6609 conditions, 1071 events. 171/1071 cut-off events. For 62041/62243 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 7174 event pairs, 0 based on Foata normal form. 86/1049 useless extension candidates. Maximal degree in co-relation 6484. Up to 178 conditions per place. [2021-10-28 23:58:00,156 INFO L132 encePairwiseOnDemand]: 59/66 looper letters, 65 selfloop transitions, 152 changer transitions 14/275 dead transitions. [2021-10-28 23:58:00,156 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 275 transitions, 7102 flow [2021-10-28 23:58:00,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-28 23:58:00,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-10-28 23:58:00,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1838 transitions. [2021-10-28 23:58:00,159 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8438934802571166 [2021-10-28 23:58:00,159 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1838 transitions. [2021-10-28 23:58:00,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1838 transitions. [2021-10-28 23:58:00,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:58:00,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1838 transitions. [2021-10-28 23:58:00,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 55.696969696969695) internal successors, (1838), 33 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:58:00,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 66.0) internal successors, (2244), 34 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:58:00,167 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 66.0) internal successors, (2244), 34 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:58:00,167 INFO L186 Difference]: Start difference. First operand has 265 places, 235 transitions, 4128 flow. Second operand 33 states and 1838 transitions. [2021-10-28 23:58:00,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 275 transitions, 7102 flow [2021-10-28 23:58:00,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 275 transitions, 6322 flow, removed 284 selfloop flow, removed 20 redundant places. [2021-10-28 23:58:00,322 INFO L242 Difference]: Finished difference. Result has 283 places, 249 transitions, 4657 flow [2021-10-28 23:58:00,323 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3506, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=4657, PETRI_PLACES=283, PETRI_TRANSITIONS=249} [2021-10-28 23:58:00,323 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 217 predicate places. [2021-10-28 23:58:00,323 INFO L470 AbstractCegarLoop]: Abstraction has has 283 places, 249 transitions, 4657 flow [2021-10-28 23:58:00,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 54.11764705882353) internal successors, (920), 17 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:58:00,324 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:58:00,324 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:58:00,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-28 23:58:00,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-28 23:58:00,551 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:58:00,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:58:00,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1334764032, now seen corresponding path program 18 times [2021-10-28 23:58:00,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:58:00,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980131032] [2021-10-28 23:58:00,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:58:00,552 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:58:00,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:58:00,668 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 72 proven. 21 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 23:58:00,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:58:00,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980131032] [2021-10-28 23:58:00,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980131032] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:58:00,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964182259] [2021-10-28 23:58:00,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:58:00,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:58:00,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:58:00,670 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:58:00,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-28 23:58:01,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-28 23:58:01,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:58:01,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 23:58:01,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:58:01,434 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 23:58:01,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964182259] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:58:01,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:58:01,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-10-28 23:58:01,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687840269] [2021-10-28 23:58:01,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 23:58:01,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:58:01,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 23:58:01,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:58:01,438 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 66 [2021-10-28 23:58:01,440 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 249 transitions, 4657 flow. Second operand has 13 states, 13 states have (on average 56.76923076923077) internal successors, (738), 13 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:58:01,440 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:58:01,440 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 66 [2021-10-28 23:58:01,440 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:58:02,404 INFO L129 PetriNetUnfolder]: 435/2584 cut-off events. [2021-10-28 23:58:02,404 INFO L130 PetriNetUnfolder]: For 99560/99685 co-relation queries the response was YES. [2021-10-28 23:58:02,443 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12586 conditions, 2584 events. 435/2584 cut-off events. For 99560/99685 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 24272 event pairs, 74 based on Foata normal form. 58/2387 useless extension candidates. Maximal degree in co-relation 12456. Up to 365 conditions per place. [2021-10-28 23:58:02,464 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 7 selfloop transitions, 21 changer transitions 0/264 dead transitions. [2021-10-28 23:58:02,464 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 264 transitions, 4511 flow [2021-10-28 23:58:02,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 23:58:02,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-28 23:58:02,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1019 transitions. [2021-10-28 23:58:02,466 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8577441077441077 [2021-10-28 23:58:02,466 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1019 transitions. [2021-10-28 23:58:02,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1019 transitions. [2021-10-28 23:58:02,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:58:02,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1019 transitions. [2021-10-28 23:58:02,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 56.611111111111114) internal successors, (1019), 18 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:58:02,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 66.0) internal successors, (1254), 19 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:58:02,471 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 66.0) internal successors, (1254), 19 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:58:02,471 INFO L186 Difference]: Start difference. First operand has 283 places, 249 transitions, 4657 flow. Second operand 18 states and 1019 transitions. [2021-10-28 23:58:02,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 264 transitions, 4511 flow [2021-10-28 23:58:02,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 264 transitions, 3697 flow, removed 309 selfloop flow, removed 25 redundant places. [2021-10-28 23:58:02,698 INFO L242 Difference]: Finished difference. Result has 271 places, 260 transitions, 3685 flow [2021-10-28 23:58:02,698 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3599, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3685, PETRI_PLACES=271, PETRI_TRANSITIONS=260} [2021-10-28 23:58:02,699 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 205 predicate places. [2021-10-28 23:58:02,699 INFO L470 AbstractCegarLoop]: Abstraction has has 271 places, 260 transitions, 3685 flow [2021-10-28 23:58:02,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.76923076923077) internal successors, (738), 13 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:58:02,699 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:58:02,699 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:58:02,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-28 23:58:02,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-28 23:58:02,904 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:58:02,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:58:02,904 INFO L85 PathProgramCache]: Analyzing trace with hash -101909755, now seen corresponding path program 19 times [2021-10-28 23:58:02,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:58:02,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749416321] [2021-10-28 23:58:02,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:58:02,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:58:02,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:58:03,034 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 62 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 23:58:03,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:58:03,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749416321] [2021-10-28 23:58:03,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749416321] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:58:03,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111366291] [2021-10-28 23:58:03,034 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:58:03,034 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:58:03,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:58:03,035 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:58:03,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-28 23:58:03,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:58:03,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 23:58:03,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:58:03,825 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 23:58:03,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111366291] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:58:03,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:58:03,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-10-28 23:58:03,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367670178] [2021-10-28 23:58:03,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 23:58:03,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:58:03,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 23:58:03,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:58:03,829 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 66 [2021-10-28 23:58:03,830 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 260 transitions, 3685 flow. Second operand has 13 states, 13 states have (on average 56.76923076923077) internal successors, (738), 13 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:58:03,830 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:58:03,830 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 66 [2021-10-28 23:58:03,830 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:58:05,865 INFO L129 PetriNetUnfolder]: 1419/7124 cut-off events. [2021-10-28 23:58:05,866 INFO L130 PetriNetUnfolder]: For 282384/282687 co-relation queries the response was YES. [2021-10-28 23:58:05,945 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36081 conditions, 7124 events. 1419/7124 cut-off events. For 282384/282687 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 85923 event pairs, 272 based on Foata normal form. 191/7017 useless extension candidates. Maximal degree in co-relation 35966. Up to 945 conditions per place. [2021-10-28 23:58:05,956 INFO L132 encePairwiseOnDemand]: 60/66 looper letters, 0 selfloop transitions, 0 changer transitions 263/263 dead transitions. [2021-10-28 23:58:05,956 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 263 transitions, 3501 flow [2021-10-28 23:58:05,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 23:58:05,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-28 23:58:05,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1019 transitions. [2021-10-28 23:58:05,960 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8577441077441077 [2021-10-28 23:58:05,960 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1019 transitions. [2021-10-28 23:58:05,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1019 transitions. [2021-10-28 23:58:05,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:58:05,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1019 transitions. [2021-10-28 23:58:05,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 56.611111111111114) internal successors, (1019), 18 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:58:05,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 66.0) internal successors, (1254), 19 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:58:05,965 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 66.0) internal successors, (1254), 19 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:58:05,965 INFO L186 Difference]: Start difference. First operand has 271 places, 260 transitions, 3685 flow. Second operand 18 states and 1019 transitions. [2021-10-28 23:58:05,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 263 transitions, 3501 flow [2021-10-28 23:58:06,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 263 transitions, 3125 flow, removed 44 selfloop flow, removed 24 redundant places. [2021-10-28 23:58:06,336 INFO L242 Difference]: Finished difference. Result has 261 places, 0 transitions, 0 flow [2021-10-28 23:58:06,337 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3027, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=0, PETRI_PLACES=261, PETRI_TRANSITIONS=0} [2021-10-28 23:58:06,337 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 195 predicate places. [2021-10-28 23:58:06,337 INFO L470 AbstractCegarLoop]: Abstraction has has 261 places, 0 transitions, 0 flow [2021-10-28 23:58:06,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.76923076923077) internal successors, (738), 13 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:58:06,340 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:58:06,340 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-28 23:58:06,340 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-28 23:58:06,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-10-28 23:58:06,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-28 23:58:06,543 INFO L731 BasicCegarLoop]: Path program histogram: [19, 4, 2, 2, 1, 1] [2021-10-28 23:58:06,545 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-28 23:58:06,545 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 23:58:06,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 11:58:06 BasicIcfg [2021-10-28 23:58:06,548 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 23:58:06,548 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:58:06,548 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:58:06,549 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:58:06,549 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:57:30" (3/4) ... [2021-10-28 23:58:06,552 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 23:58:06,557 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2021-10-28 23:58:06,557 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2021-10-28 23:58:06,559 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-10-28 23:58:06,560 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-28 23:58:06,560 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-28 23:58:06,560 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 23:58:06,584 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 23:58:06,584 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:58:06,586 INFO L168 Benchmark]: Toolchain (without parser) took 37204.39 ms. Allocated memory was 96.5 MB in the beginning and 654.3 MB in the end (delta: 557.8 MB). Free memory was 53.7 MB in the beginning and 299.2 MB in the end (delta: -245.5 MB). Peak memory consumption was 311.6 MB. Max. memory is 16.1 GB. [2021-10-28 23:58:06,586 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 96.5 MB. Free memory was 71.2 MB in the beginning and 71.2 MB in the end (delta: 55.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:58:06,587 INFO L168 Benchmark]: CACSL2BoogieTranslator took 653.82 ms. Allocated memory is still 96.5 MB. Free memory was 53.4 MB in the beginning and 63.7 MB in the end (delta: -10.3 MB). Peak memory consumption was 4.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:58:06,587 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.71 ms. Allocated memory is still 96.5 MB. Free memory was 63.7 MB in the beginning and 61.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:58:06,588 INFO L168 Benchmark]: Boogie Preprocessor took 55.63 ms. Allocated memory is still 96.5 MB. Free memory was 61.8 MB in the beginning and 60.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:58:06,588 INFO L168 Benchmark]: RCFGBuilder took 467.29 ms. Allocated memory is still 96.5 MB. Free memory was 60.3 MB in the beginning and 48.9 MB in the end (delta: 11.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 23:58:06,589 INFO L168 Benchmark]: TraceAbstraction took 35945.53 ms. Allocated memory was 96.5 MB in the beginning and 654.3 MB in the end (delta: 557.8 MB). Free memory was 48.4 MB in the beginning and 301.3 MB in the end (delta: -252.9 MB). Peak memory consumption was 328.9 MB. Max. memory is 16.1 GB. [2021-10-28 23:58:06,589 INFO L168 Benchmark]: Witness Printer took 36.39 ms. Allocated memory is still 654.3 MB. Free memory was 301.3 MB in the beginning and 299.2 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:58:06,593 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 96.5 MB. Free memory was 71.2 MB in the beginning and 71.2 MB in the end (delta: 55.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 653.82 ms. Allocated memory is still 96.5 MB. Free memory was 53.4 MB in the beginning and 63.7 MB in the end (delta: -10.3 MB). Peak memory consumption was 4.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.71 ms. Allocated memory is still 96.5 MB. Free memory was 63.7 MB in the beginning and 61.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 55.63 ms. Allocated memory is still 96.5 MB. Free memory was 61.8 MB in the beginning and 60.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 467.29 ms. Allocated memory is still 96.5 MB. Free memory was 60.3 MB in the beginning and 48.9 MB in the end (delta: 11.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 35945.53 ms. Allocated memory was 96.5 MB in the beginning and 654.3 MB in the end (delta: 557.8 MB). Free memory was 48.4 MB in the beginning and 301.3 MB in the end (delta: -252.9 MB). Peak memory consumption was 328.9 MB. Max. memory is 16.1 GB. * Witness Printer took 36.39 ms. Allocated memory is still 654.3 MB. Free memory was 301.3 MB in the beginning and 299.2 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 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, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 722]: 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 with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 35.7s, OverallIterations: 29, TraceHistogramMax: 6, PathProgramHistogramMax: 19, EmptinessCheckTime: 0.0s, AutomataDifference: 14.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 141 SDtfs, 705 SDslu, 298 SDs, 0 SdLazy, 2618 SolverSat, 855 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1953 GetRequests, 1375 SyntacticMatches, 0 SemanticMatches, 578 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2759 ImplicationChecksByTransitivity, 4.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4657occurred in iteration=27, InterpolantAutomatonStates: 509, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 8.3s InterpolantComputationTime, 2970 NumberOfCodeBlocks, 2970 NumberOfCodeBlocksAsserted, 87 NumberOfCheckSat, 2918 ConstructedInterpolants, 0 QuantifiedInterpolants, 9798 SizeOfPredicates, 154 NumberOfNonLiveVariables, 3442 ConjunctsInSsa, 263 ConjunctsInUnsatCore, 52 InterpolantComputations, 8 PerfectInterpolantSequences, 360/1194 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! [2021-10-28 23:58:06,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395f5739-3568-4e9b-9906-70d8a45d3f0f/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...