./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y --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 7faf759f4f4392e84815a483ab24e4497f918cd291dc733acf407d398902eccf --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:23:00,230 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:23:00,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:23:00,286 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:23:00,287 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:23:00,288 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:23:00,291 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:23:00,294 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:23:00,296 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:23:00,298 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:23:00,300 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:23:00,301 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:23:00,302 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:23:00,304 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:23:00,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:23:00,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:23:00,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:23:00,311 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:23:00,313 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:23:00,317 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:23:00,319 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:23:00,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:23:00,323 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:23:00,324 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:23:00,330 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:23:00,336 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:23:00,337 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:23:00,338 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:23:00,338 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:23:00,340 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:23:00,340 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:23:00,342 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:23:00,343 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:23:00,344 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:23:00,346 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:23:00,347 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:23:00,348 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:23:00,348 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:23:00,348 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:23:00,350 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:23:00,351 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:23:00,352 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:23:00,415 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:23:00,420 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:23:00,421 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:23:00,422 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:23:00,423 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:23:00,424 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:23:00,425 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:23:00,425 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:23:00,425 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:23:00,426 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:23:00,427 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:23:00,428 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:23:00,428 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:23:00,428 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:23:00,429 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:23:00,429 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:23:00,429 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:23:00,430 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:23:00,430 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:23:00,430 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:23:00,431 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:23:00,431 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:23:00,431 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:23:00,432 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:23:00,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:23:00,432 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:23:00,433 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:23:00,433 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:23:00,433 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:23:00,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:23:00,434 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:23:00,434 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:23:00,435 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:23:00,435 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:23:00,435 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_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7faf759f4f4392e84815a483ab24e4497f918cd291dc733acf407d398902eccf [2021-11-13 18:23:00,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:23:00,757 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:23:00,760 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:23:00,762 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:23:00,763 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:23:00,765 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c [2021-11-13 18:23:00,854 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/data/0f9a0a1b1/3e9296ff90454676aeb9e0812c7dad69/FLAG9db3efa4a [2021-11-13 18:23:01,421 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:23:01,422 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c [2021-11-13 18:23:01,440 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/data/0f9a0a1b1/3e9296ff90454676aeb9e0812c7dad69/FLAG9db3efa4a [2021-11-13 18:23:01,758 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/data/0f9a0a1b1/3e9296ff90454676aeb9e0812c7dad69 [2021-11-13 18:23:01,761 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:23:01,766 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:23:01,769 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:23:01,769 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:23:01,773 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:23:01,774 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:23:01" (1/1) ... [2021-11-13 18:23:01,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4be808c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:23:01, skipping insertion in model container [2021-11-13 18:23:01,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:23:01" (1/1) ... [2021-11-13 18:23:01,788 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:23:01,816 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:23:02,093 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_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c[2591,2604] [2021-11-13 18:23:02,103 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:23:02,120 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:23:02,167 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_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c[2591,2604] [2021-11-13 18:23:02,169 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:23:02,188 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:23:02,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:23:02 WrapperNode [2021-11-13 18:23:02,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:23:02,192 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:23:02,192 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:23:02,192 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:23:02,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:23:02" (1/1) ... [2021-11-13 18:23:02,230 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:23:02" (1/1) ... [2021-11-13 18:23:02,253 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:23:02,254 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:23:02,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:23:02,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:23:02,263 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:23:02" (1/1) ... [2021-11-13 18:23:02,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:23:02" (1/1) ... [2021-11-13 18:23:02,266 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:23:02" (1/1) ... [2021-11-13 18:23:02,267 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:23:02" (1/1) ... [2021-11-13 18:23:02,274 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:23:02" (1/1) ... [2021-11-13 18:23:02,279 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:23:02" (1/1) ... [2021-11-13 18:23:02,281 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:23:02" (1/1) ... [2021-11-13 18:23:02,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:23:02,285 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:23:02,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:23:02,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:23:02,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:23:02" (1/1) ... [2021-11-13 18:23:02,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:23:02,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:23:02,331 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:23:02,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:23:02,375 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-13 18:23:02,375 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-13 18:23:02,375 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-13 18:23:02,375 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-13 18:23:02,376 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-11-13 18:23:02,376 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-11-13 18:23:02,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:23:02,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:23:02,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 18:23:02,376 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-13 18:23:02,377 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-13 18:23:02,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:23:02,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:23:02,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 18:23:02,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:23:02,379 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-13 18:23:02,811 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:23:02,811 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-13 18:23:02,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:23:02 BoogieIcfgContainer [2021-11-13 18:23:02,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:23:02,825 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:23:02,825 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:23:02,836 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:23:02,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:23:01" (1/3) ... [2021-11-13 18:23:02,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2099c8bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:23:02, skipping insertion in model container [2021-11-13 18:23:02,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:23:02" (2/3) ... [2021-11-13 18:23:02,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2099c8bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:23:02, skipping insertion in model container [2021-11-13 18:23:02,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:23:02" (3/3) ... [2021-11-13 18:23:02,840 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-mult-equiv.wvr.c [2021-11-13 18:23:02,846 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-13 18:23:02,846 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:23:02,847 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:23:02,847 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-13 18:23:02,928 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,929 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,930 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,930 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,938 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,942 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,942 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,942 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,943 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,943 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,945 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,945 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,946 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,946 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,947 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,947 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,948 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,948 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,948 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,949 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,949 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,949 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,950 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,950 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,950 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,950 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,951 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,951 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,952 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,952 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,953 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,953 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,953 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,954 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,958 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,958 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,958 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,959 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,960 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,960 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,961 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,962 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,962 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,963 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-13 18:23:02,968 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-11-13 18:23:03,032 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:23:03,042 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 18:23:03,042 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-13 18:23:03,060 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 100 places, 97 transitions, 218 flow [2021-11-13 18:23:03,174 INFO L129 PetriNetUnfolder]: 7/94 cut-off events. [2021-11-13 18:23:03,177 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-11-13 18:23:03,184 INFO L84 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 94 events. 7/94 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2021-11-13 18:23:03,185 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 97 transitions, 218 flow [2021-11-13 18:23:03,195 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 83 transitions, 184 flow [2021-11-13 18:23:03,256 INFO L129 PetriNetUnfolder]: 7/82 cut-off events. [2021-11-13 18:23:03,256 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-11-13 18:23:03,257 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:23:03,257 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:03,258 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-13 18:23:03,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:03,264 INFO L85 PathProgramCache]: Analyzing trace with hash 64157928, now seen corresponding path program 1 times [2021-11-13 18:23:03,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:03,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141716276] [2021-11-13 18:23:03,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:03,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:03,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:03,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:03,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:03,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141716276] [2021-11-13 18:23:03,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141716276] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:23:03,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:23:03,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:23:03,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434135392] [2021-11-13 18:23:03,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:03,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 18:23:03,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:03,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 18:23:03,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:23:03,600 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 97 [2021-11-13 18:23:03,605 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 184 flow. Second operand has 2 states, 2 states have (on average 87.5) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:03,605 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:23:03,605 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 97 [2021-11-13 18:23:03,607 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:23:03,737 INFO L129 PetriNetUnfolder]: 26/138 cut-off events. [2021-11-13 18:23:03,741 INFO L130 PetriNetUnfolder]: For 28/29 co-relation queries the response was YES. [2021-11-13 18:23:03,745 INFO L84 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 138 events. 26/138 cut-off events. For 28/29 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 246 event pairs, 7 based on Foata normal form. 25/148 useless extension candidates. Maximal degree in co-relation 127. Up to 39 conditions per place. [2021-11-13 18:23:03,750 INFO L132 encePairwiseOnDemand]: 93/97 looper letters, 9 selfloop transitions, 0 changer transitions 1/79 dead transitions. [2021-11-13 18:23:03,751 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 79 transitions, 194 flow [2021-11-13 18:23:03,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 18:23:03,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-13 18:23:03,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 179 transitions. [2021-11-13 18:23:03,773 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9226804123711341 [2021-11-13 18:23:03,774 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 179 transitions. [2021-11-13 18:23:03,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 179 transitions. [2021-11-13 18:23:03,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:23:03,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 179 transitions. [2021-11-13 18:23:03,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 89.5) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:03,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:03,811 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:03,813 INFO L186 Difference]: Start difference. First operand has 86 places, 83 transitions, 184 flow. Second operand 2 states and 179 transitions. [2021-11-13 18:23:03,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 79 transitions, 194 flow [2021-11-13 18:23:03,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 79 transitions, 182 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-11-13 18:23:03,823 INFO L242 Difference]: Finished difference. Result has 81 places, 78 transitions, 162 flow [2021-11-13 18:23:03,826 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=162, PETRI_PLACES=81, PETRI_TRANSITIONS=78} [2021-11-13 18:23:03,830 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, -5 predicate places. [2021-11-13 18:23:03,831 INFO L470 AbstractCegarLoop]: Abstraction has has 81 places, 78 transitions, 162 flow [2021-11-13 18:23:03,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 87.5) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:03,831 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:23:03,832 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:03,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:23:03,832 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-13 18:23:03,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:03,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1292779301, now seen corresponding path program 1 times [2021-11-13 18:23:03,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:03,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96163068] [2021-11-13 18:23:03,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:03,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:04,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:04,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:04,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:04,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96163068] [2021-11-13 18:23:04,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96163068] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:23:04,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:23:04,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:23:04,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966798819] [2021-11-13 18:23:04,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:04,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:23:04,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:04,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:23:04,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:23:04,324 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 97 [2021-11-13 18:23:04,326 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 78 transitions, 162 flow. Second operand has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:04,326 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:23:04,326 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 97 [2021-11-13 18:23:04,326 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:23:04,518 INFO L129 PetriNetUnfolder]: 34/192 cut-off events. [2021-11-13 18:23:04,518 INFO L130 PetriNetUnfolder]: For 12/13 co-relation queries the response was YES. [2021-11-13 18:23:04,522 INFO L84 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 192 events. 34/192 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 479 event pairs, 1 based on Foata normal form. 2/180 useless extension candidates. Maximal degree in co-relation 266. Up to 44 conditions per place. [2021-11-13 18:23:04,525 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 25 selfloop transitions, 7 changer transitions 4/99 dead transitions. [2021-11-13 18:23:04,525 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 99 transitions, 284 flow [2021-11-13 18:23:04,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:23:04,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-13 18:23:04,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 493 transitions. [2021-11-13 18:23:04,535 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8470790378006873 [2021-11-13 18:23:04,535 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 493 transitions. [2021-11-13 18:23:04,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 493 transitions. [2021-11-13 18:23:04,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:23:04,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 493 transitions. [2021-11-13 18:23:04,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.16666666666667) internal successors, (493), 6 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:04,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:04,547 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:04,548 INFO L186 Difference]: Start difference. First operand has 81 places, 78 transitions, 162 flow. Second operand 6 states and 493 transitions. [2021-11-13 18:23:04,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 99 transitions, 284 flow [2021-11-13 18:23:04,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 99 transitions, 284 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-13 18:23:04,554 INFO L242 Difference]: Finished difference. Result has 88 places, 83 transitions, 202 flow [2021-11-13 18:23:04,555 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=202, PETRI_PLACES=88, PETRI_TRANSITIONS=83} [2021-11-13 18:23:04,556 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 2 predicate places. [2021-11-13 18:23:04,556 INFO L470 AbstractCegarLoop]: Abstraction has has 88 places, 83 transitions, 202 flow [2021-11-13 18:23:04,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:04,557 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:23:04,557 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:04,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:23:04,558 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-13 18:23:04,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:04,561 INFO L85 PathProgramCache]: Analyzing trace with hash -187386445, now seen corresponding path program 1 times [2021-11-13 18:23:04,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:04,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477636982] [2021-11-13 18:23:04,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:04,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:04,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:04,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:04,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:04,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477636982] [2021-11-13 18:23:04,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477636982] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:23:04,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:23:04,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:23:04,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281228731] [2021-11-13 18:23:04,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:04,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:23:04,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:04,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:23:04,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:23:04,922 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-11-13 18:23:04,924 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:04,924 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:23:04,924 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-11-13 18:23:04,925 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:23:05,353 INFO L129 PetriNetUnfolder]: 306/793 cut-off events. [2021-11-13 18:23:05,354 INFO L130 PetriNetUnfolder]: For 134/139 co-relation queries the response was YES. [2021-11-13 18:23:05,358 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1519 conditions, 793 events. 306/793 cut-off events. For 134/139 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4379 event pairs, 50 based on Foata normal form. 0/682 useless extension candidates. Maximal degree in co-relation 1512. Up to 254 conditions per place. [2021-11-13 18:23:05,370 INFO L132 encePairwiseOnDemand]: 86/97 looper letters, 58 selfloop transitions, 16 changer transitions 0/131 dead transitions. [2021-11-13 18:23:05,370 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 131 transitions, 491 flow [2021-11-13 18:23:05,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:23:05,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-13 18:23:05,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 565 transitions. [2021-11-13 18:23:05,374 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8321060382916053 [2021-11-13 18:23:05,374 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 565 transitions. [2021-11-13 18:23:05,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 565 transitions. [2021-11-13 18:23:05,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:23:05,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 565 transitions. [2021-11-13 18:23:05,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 80.71428571428571) internal successors, (565), 7 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:05,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:05,381 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:05,382 INFO L186 Difference]: Start difference. First operand has 88 places, 83 transitions, 202 flow. Second operand 7 states and 565 transitions. [2021-11-13 18:23:05,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 131 transitions, 491 flow [2021-11-13 18:23:05,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 131 transitions, 487 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-11-13 18:23:05,396 INFO L242 Difference]: Finished difference. Result has 94 places, 95 transitions, 309 flow [2021-11-13 18:23:05,397 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=309, PETRI_PLACES=94, PETRI_TRANSITIONS=95} [2021-11-13 18:23:05,401 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 8 predicate places. [2021-11-13 18:23:05,401 INFO L470 AbstractCegarLoop]: Abstraction has has 94 places, 95 transitions, 309 flow [2021-11-13 18:23:05,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:05,408 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:23:05,408 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:05,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:23:05,409 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-13 18:23:05,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:05,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1063937339, now seen corresponding path program 2 times [2021-11-13 18:23:05,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:05,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160149459] [2021-11-13 18:23:05,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:05,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:05,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:05,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:05,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:05,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160149459] [2021-11-13 18:23:05,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160149459] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:23:05,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:23:05,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:23:05,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902733809] [2021-11-13 18:23:05,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:05,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:23:05,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:05,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:23:05,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:23:05,663 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-11-13 18:23:05,665 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 95 transitions, 309 flow. Second operand has 5 states, 5 states have (on average 74.2) internal successors, (371), 5 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:05,665 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:23:05,665 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-11-13 18:23:05,665 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:23:05,997 INFO L129 PetriNetUnfolder]: 380/923 cut-off events. [2021-11-13 18:23:05,997 INFO L130 PetriNetUnfolder]: For 460/468 co-relation queries the response was YES. [2021-11-13 18:23:06,002 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2192 conditions, 923 events. 380/923 cut-off events. For 460/468 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5092 event pairs, 69 based on Foata normal form. 22/880 useless extension candidates. Maximal degree in co-relation 2182. Up to 418 conditions per place. [2021-11-13 18:23:06,013 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 54 selfloop transitions, 19 changer transitions 2/132 dead transitions. [2021-11-13 18:23:06,013 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 132 transitions, 625 flow [2021-11-13 18:23:06,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:23:06,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-13 18:23:06,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 485 transitions. [2021-11-13 18:23:06,016 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2021-11-13 18:23:06,017 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 485 transitions. [2021-11-13 18:23:06,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 485 transitions. [2021-11-13 18:23:06,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:23:06,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 485 transitions. [2021-11-13 18:23:06,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 80.83333333333333) internal successors, (485), 6 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:06,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:06,023 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:06,023 INFO L186 Difference]: Start difference. First operand has 94 places, 95 transitions, 309 flow. Second operand 6 states and 485 transitions. [2021-11-13 18:23:06,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 132 transitions, 625 flow [2021-11-13 18:23:06,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 132 transitions, 621 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-11-13 18:23:06,032 INFO L242 Difference]: Finished difference. Result has 102 places, 105 transitions, 447 flow [2021-11-13 18:23:06,033 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=447, PETRI_PLACES=102, PETRI_TRANSITIONS=105} [2021-11-13 18:23:06,034 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 16 predicate places. [2021-11-13 18:23:06,034 INFO L470 AbstractCegarLoop]: Abstraction has has 102 places, 105 transitions, 447 flow [2021-11-13 18:23:06,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.2) internal successors, (371), 5 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:06,035 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:23:06,035 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:06,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 18:23:06,035 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-13 18:23:06,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:06,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1428144401, now seen corresponding path program 3 times [2021-11-13 18:23:06,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:06,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823000384] [2021-11-13 18:23:06,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:06,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:06,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:06,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:06,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:06,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823000384] [2021-11-13 18:23:06,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823000384] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:23:06,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:23:06,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:23:06,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007721609] [2021-11-13 18:23:06,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:06,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:23:06,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:06,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:23:06,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:23:06,399 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-11-13 18:23:06,400 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 105 transitions, 447 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:06,400 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:23:06,400 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-11-13 18:23:06,400 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:23:06,901 INFO L129 PetriNetUnfolder]: 578/1332 cut-off events. [2021-11-13 18:23:06,901 INFO L130 PetriNetUnfolder]: For 933/942 co-relation queries the response was YES. [2021-11-13 18:23:06,910 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3336 conditions, 1332 events. 578/1332 cut-off events. For 933/942 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 8136 event pairs, 107 based on Foata normal form. 23/1287 useless extension candidates. Maximal degree in co-relation 3321. Up to 478 conditions per place. [2021-11-13 18:23:06,926 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 72 selfloop transitions, 30 changer transitions 2/161 dead transitions. [2021-11-13 18:23:06,927 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 161 transitions, 897 flow [2021-11-13 18:23:06,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:23:06,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-13 18:23:06,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 576 transitions. [2021-11-13 18:23:06,932 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8483063328424153 [2021-11-13 18:23:06,932 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 576 transitions. [2021-11-13 18:23:06,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 576 transitions. [2021-11-13 18:23:06,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:23:06,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 576 transitions. [2021-11-13 18:23:06,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 82.28571428571429) internal successors, (576), 7 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:06,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:06,939 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:06,940 INFO L186 Difference]: Start difference. First operand has 102 places, 105 transitions, 447 flow. Second operand 7 states and 576 transitions. [2021-11-13 18:23:06,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 161 transitions, 897 flow [2021-11-13 18:23:06,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 161 transitions, 861 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-11-13 18:23:06,955 INFO L242 Difference]: Finished difference. Result has 111 places, 118 transitions, 631 flow [2021-11-13 18:23:06,956 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=631, PETRI_PLACES=111, PETRI_TRANSITIONS=118} [2021-11-13 18:23:06,960 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 25 predicate places. [2021-11-13 18:23:06,960 INFO L470 AbstractCegarLoop]: Abstraction has has 111 places, 118 transitions, 631 flow [2021-11-13 18:23:06,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:06,961 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:23:06,961 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:06,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 18:23:06,961 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-13 18:23:06,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:06,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1560565135, now seen corresponding path program 4 times [2021-11-13 18:23:06,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:06,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107013193] [2021-11-13 18:23:06,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:06,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:07,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:07,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:07,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:07,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107013193] [2021-11-13 18:23:07,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107013193] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:23:07,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:23:07,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:23:07,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971875173] [2021-11-13 18:23:07,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:07,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:23:07,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:07,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:23:07,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:23:07,163 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-11-13 18:23:07,164 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 118 transitions, 631 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:07,165 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:23:07,165 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-11-13 18:23:07,165 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:23:07,658 INFO L129 PetriNetUnfolder]: 593/1378 cut-off events. [2021-11-13 18:23:07,659 INFO L130 PetriNetUnfolder]: For 1898/1906 co-relation queries the response was YES. [2021-11-13 18:23:07,667 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3932 conditions, 1378 events. 593/1378 cut-off events. For 1898/1906 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 8417 event pairs, 109 based on Foata normal form. 20/1306 useless extension candidates. Maximal degree in co-relation 3912. Up to 549 conditions per place. [2021-11-13 18:23:07,685 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 60 selfloop transitions, 34 changer transitions 2/153 dead transitions. [2021-11-13 18:23:07,685 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 153 transitions, 997 flow [2021-11-13 18:23:07,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:23:07,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-11-13 18:23:07,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 639 transitions. [2021-11-13 18:23:07,689 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8234536082474226 [2021-11-13 18:23:07,689 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 639 transitions. [2021-11-13 18:23:07,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 639 transitions. [2021-11-13 18:23:07,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:23:07,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 639 transitions. [2021-11-13 18:23:07,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 79.875) internal successors, (639), 8 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:07,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:07,696 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:07,696 INFO L186 Difference]: Start difference. First operand has 111 places, 118 transitions, 631 flow. Second operand 8 states and 639 transitions. [2021-11-13 18:23:07,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 153 transitions, 997 flow [2021-11-13 18:23:07,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 153 transitions, 989 flow, removed 4 selfloop flow, removed 0 redundant places. [2021-11-13 18:23:07,715 INFO L242 Difference]: Finished difference. Result has 121 places, 123 transitions, 757 flow [2021-11-13 18:23:07,716 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=757, PETRI_PLACES=121, PETRI_TRANSITIONS=123} [2021-11-13 18:23:07,718 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 35 predicate places. [2021-11-13 18:23:07,719 INFO L470 AbstractCegarLoop]: Abstraction has has 121 places, 123 transitions, 757 flow [2021-11-13 18:23:07,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:07,719 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:23:07,720 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:07,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 18:23:07,720 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-13 18:23:07,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:07,722 INFO L85 PathProgramCache]: Analyzing trace with hash -165074320, now seen corresponding path program 1 times [2021-11-13 18:23:07,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:07,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760800569] [2021-11-13 18:23:07,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:07,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:07,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:07,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:07,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:07,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760800569] [2021-11-13 18:23:07,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760800569] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:23:07,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249050177] [2021-11-13 18:23:07,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:07,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:23:07,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:23:07,987 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:23:08,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:23:08,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:08,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 18:23:08,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:23:08,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:08,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:23:09,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:09,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249050177] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 18:23:09,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:23:09,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 7] total 12 [2021-11-13 18:23:09,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644867045] [2021-11-13 18:23:09,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:09,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:23:09,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:09,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:23:09,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:23:09,269 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2021-11-13 18:23:09,270 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 123 transitions, 757 flow. Second operand has 7 states, 7 states have (on average 71.57142857142857) internal successors, (501), 7 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:09,270 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:23:09,270 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2021-11-13 18:23:09,270 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:23:10,308 INFO L129 PetriNetUnfolder]: 1445/3070 cut-off events. [2021-11-13 18:23:10,308 INFO L130 PetriNetUnfolder]: For 5552/5567 co-relation queries the response was YES. [2021-11-13 18:23:10,328 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9317 conditions, 3070 events. 1445/3070 cut-off events. For 5552/5567 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 21867 event pairs, 161 based on Foata normal form. 9/2841 useless extension candidates. Maximal degree in co-relation 9293. Up to 910 conditions per place. [2021-11-13 18:23:10,365 INFO L132 encePairwiseOnDemand]: 82/97 looper letters, 136 selfloop transitions, 54 changer transitions 2/247 dead transitions. [2021-11-13 18:23:10,366 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 247 transitions, 1917 flow [2021-11-13 18:23:10,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 18:23:10,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-11-13 18:23:10,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 947 transitions. [2021-11-13 18:23:10,371 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.813573883161512 [2021-11-13 18:23:10,372 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 947 transitions. [2021-11-13 18:23:10,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 947 transitions. [2021-11-13 18:23:10,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:23:10,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 947 transitions. [2021-11-13 18:23:10,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 78.91666666666667) internal successors, (947), 12 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:10,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 97.0) internal successors, (1261), 13 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:10,382 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 97.0) internal successors, (1261), 13 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:10,383 INFO L186 Difference]: Start difference. First operand has 121 places, 123 transitions, 757 flow. Second operand 12 states and 947 transitions. [2021-11-13 18:23:10,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 247 transitions, 1917 flow [2021-11-13 18:23:10,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 247 transitions, 1804 flow, removed 6 selfloop flow, removed 5 redundant places. [2021-11-13 18:23:10,417 INFO L242 Difference]: Finished difference. Result has 134 places, 161 transitions, 1189 flow [2021-11-13 18:23:10,417 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=696, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1189, PETRI_PLACES=134, PETRI_TRANSITIONS=161} [2021-11-13 18:23:10,418 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 48 predicate places. [2021-11-13 18:23:10,419 INFO L470 AbstractCegarLoop]: Abstraction has has 134 places, 161 transitions, 1189 flow [2021-11-13 18:23:10,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 71.57142857142857) internal successors, (501), 7 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:10,419 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:23:10,420 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:10,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:23:10,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-13 18:23:10,637 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-13 18:23:10,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:10,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1481379744, now seen corresponding path program 2 times [2021-11-13 18:23:10,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:10,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974608282] [2021-11-13 18:23:10,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:10,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:10,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:10,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:10,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:10,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974608282] [2021-11-13 18:23:10,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974608282] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:23:10,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:23:10,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:23:10,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407828889] [2021-11-13 18:23:10,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:10,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:23:10,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:10,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:23:10,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:23:10,961 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-11-13 18:23:10,962 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 161 transitions, 1189 flow. Second operand has 6 states, 6 states have (on average 73.83333333333333) internal successors, (443), 6 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:10,962 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:23:10,962 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-11-13 18:23:10,962 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:23:11,710 INFO L129 PetriNetUnfolder]: 1074/2427 cut-off events. [2021-11-13 18:23:11,711 INFO L130 PetriNetUnfolder]: For 8420/8553 co-relation queries the response was YES. [2021-11-13 18:23:11,729 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9298 conditions, 2427 events. 1074/2427 cut-off events. For 8420/8553 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 17117 event pairs, 157 based on Foata normal form. 71/2441 useless extension candidates. Maximal degree in co-relation 9268. Up to 969 conditions per place. [2021-11-13 18:23:11,760 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 94 selfloop transitions, 40 changer transitions 2/204 dead transitions. [2021-11-13 18:23:11,760 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 204 transitions, 1730 flow [2021-11-13 18:23:11,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:23:11,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-13 18:23:11,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 562 transitions. [2021-11-13 18:23:11,763 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8276877761413843 [2021-11-13 18:23:11,764 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 562 transitions. [2021-11-13 18:23:11,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 562 transitions. [2021-11-13 18:23:11,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:23:11,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 562 transitions. [2021-11-13 18:23:11,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 80.28571428571429) internal successors, (562), 7 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:11,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:11,770 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:11,770 INFO L186 Difference]: Start difference. First operand has 134 places, 161 transitions, 1189 flow. Second operand 7 states and 562 transitions. [2021-11-13 18:23:11,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 204 transitions, 1730 flow [2021-11-13 18:23:11,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 204 transitions, 1680 flow, removed 25 selfloop flow, removed 0 redundant places. [2021-11-13 18:23:11,831 INFO L242 Difference]: Finished difference. Result has 143 places, 161 transitions, 1279 flow [2021-11-13 18:23:11,832 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=1091, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1279, PETRI_PLACES=143, PETRI_TRANSITIONS=161} [2021-11-13 18:23:11,833 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 57 predicate places. [2021-11-13 18:23:11,833 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 161 transitions, 1279 flow [2021-11-13 18:23:11,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.83333333333333) internal successors, (443), 6 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:11,834 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:23:11,834 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:11,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 18:23:11,835 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-13 18:23:11,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:11,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1851712342, now seen corresponding path program 1 times [2021-11-13 18:23:11,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:11,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239454986] [2021-11-13 18:23:11,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:11,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:11,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:11,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:11,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239454986] [2021-11-13 18:23:11,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239454986] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:23:11,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:23:11,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:23:11,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325256262] [2021-11-13 18:23:11,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:11,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:23:11,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:11,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:23:11,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:23:11,998 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2021-11-13 18:23:11,999 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 161 transitions, 1279 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:11,999 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:23:11,999 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2021-11-13 18:23:12,000 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:23:13,098 INFO L129 PetriNetUnfolder]: 1522/3454 cut-off events. [2021-11-13 18:23:13,098 INFO L130 PetriNetUnfolder]: For 17111/17637 co-relation queries the response was YES. [2021-11-13 18:23:13,133 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14632 conditions, 3454 events. 1522/3454 cut-off events. For 17111/17637 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 26981 event pairs, 159 based on Foata normal form. 79/3418 useless extension candidates. Maximal degree in co-relation 14599. Up to 970 conditions per place. [2021-11-13 18:23:13,182 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 105 selfloop transitions, 67 changer transitions 0/253 dead transitions. [2021-11-13 18:23:13,182 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 253 transitions, 2667 flow [2021-11-13 18:23:13,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:23:13,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-11-13 18:23:13,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 414 transitions. [2021-11-13 18:23:13,185 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8536082474226804 [2021-11-13 18:23:13,186 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 414 transitions. [2021-11-13 18:23:13,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 414 transitions. [2021-11-13 18:23:13,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:23:13,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 414 transitions. [2021-11-13 18:23:13,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.8) internal successors, (414), 5 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:13,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:13,191 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:13,191 INFO L186 Difference]: Start difference. First operand has 143 places, 161 transitions, 1279 flow. Second operand 5 states and 414 transitions. [2021-11-13 18:23:13,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 253 transitions, 2667 flow [2021-11-13 18:23:13,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 253 transitions, 2603 flow, removed 6 selfloop flow, removed 3 redundant places. [2021-11-13 18:23:13,332 INFO L242 Difference]: Finished difference. Result has 148 places, 209 transitions, 2160 flow [2021-11-13 18:23:13,332 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=1242, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2160, PETRI_PLACES=148, PETRI_TRANSITIONS=209} [2021-11-13 18:23:13,334 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 62 predicate places. [2021-11-13 18:23:13,334 INFO L470 AbstractCegarLoop]: Abstraction has has 148 places, 209 transitions, 2160 flow [2021-11-13 18:23:13,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:13,335 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:23:13,335 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:13,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 18:23:13,336 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-13 18:23:13,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:13,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1739233992, now seen corresponding path program 2 times [2021-11-13 18:23:13,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:13,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905959737] [2021-11-13 18:23:13,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:13,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:13,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:13,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:13,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:13,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905959737] [2021-11-13 18:23:13,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905959737] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:23:13,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:23:13,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:23:13,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488820077] [2021-11-13 18:23:13,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:13,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:23:13,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:13,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:23:13,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:23:13,506 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2021-11-13 18:23:13,507 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 209 transitions, 2160 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:13,507 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:23:13,507 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2021-11-13 18:23:13,507 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:23:14,741 INFO L129 PetriNetUnfolder]: 1667/4171 cut-off events. [2021-11-13 18:23:14,741 INFO L130 PetriNetUnfolder]: For 22537/23175 co-relation queries the response was YES. [2021-11-13 18:23:14,787 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18281 conditions, 4171 events. 1667/4171 cut-off events. For 22537/23175 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 35959 event pairs, 259 based on Foata normal form. 98/4124 useless extension candidates. Maximal degree in co-relation 18245. Up to 1208 conditions per place. [2021-11-13 18:23:14,844 INFO L132 encePairwiseOnDemand]: 87/97 looper letters, 84 selfloop transitions, 89 changer transitions 0/254 dead transitions. [2021-11-13 18:23:14,845 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 254 transitions, 2888 flow [2021-11-13 18:23:14,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:23:14,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-13 18:23:14,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 486 transitions. [2021-11-13 18:23:14,849 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8350515463917526 [2021-11-13 18:23:14,849 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 486 transitions. [2021-11-13 18:23:14,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 486 transitions. [2021-11-13 18:23:14,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:23:14,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 486 transitions. [2021-11-13 18:23:14,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.0) internal successors, (486), 6 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:14,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:14,855 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:14,856 INFO L186 Difference]: Start difference. First operand has 148 places, 209 transitions, 2160 flow. Second operand 6 states and 486 transitions. [2021-11-13 18:23:14,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 254 transitions, 2888 flow [2021-11-13 18:23:14,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 254 transitions, 2872 flow, removed 8 selfloop flow, removed 0 redundant places. [2021-11-13 18:23:14,994 INFO L242 Difference]: Finished difference. Result has 156 places, 221 transitions, 2608 flow [2021-11-13 18:23:14,995 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=2144, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2608, PETRI_PLACES=156, PETRI_TRANSITIONS=221} [2021-11-13 18:23:14,996 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 70 predicate places. [2021-11-13 18:23:14,997 INFO L470 AbstractCegarLoop]: Abstraction has has 156 places, 221 transitions, 2608 flow [2021-11-13 18:23:14,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:14,998 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:23:14,998 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:14,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 18:23:14,998 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-13 18:23:14,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:14,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1972316346, now seen corresponding path program 3 times [2021-11-13 18:23:14,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:15,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160047143] [2021-11-13 18:23:15,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:15,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:15,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:15,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:15,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:15,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160047143] [2021-11-13 18:23:15,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160047143] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:23:15,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:23:15,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:23:15,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213145990] [2021-11-13 18:23:15,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:15,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:23:15,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:15,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:23:15,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:23:15,198 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2021-11-13 18:23:15,199 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 221 transitions, 2608 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:15,199 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:23:15,199 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2021-11-13 18:23:15,200 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:23:16,395 INFO L129 PetriNetUnfolder]: 1673/4119 cut-off events. [2021-11-13 18:23:16,396 INFO L130 PetriNetUnfolder]: For 28643/29292 co-relation queries the response was YES. [2021-11-13 18:23:16,451 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19656 conditions, 4119 events. 1673/4119 cut-off events. For 28643/29292 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 35049 event pairs, 173 based on Foata normal form. 100/4082 useless extension candidates. Maximal degree in co-relation 19616. Up to 1388 conditions per place. [2021-11-13 18:23:16,500 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 101 selfloop transitions, 106 changer transitions 1/289 dead transitions. [2021-11-13 18:23:16,501 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 289 transitions, 3725 flow [2021-11-13 18:23:16,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:23:16,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-13 18:23:16,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 497 transitions. [2021-11-13 18:23:16,504 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8539518900343642 [2021-11-13 18:23:16,504 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 497 transitions. [2021-11-13 18:23:16,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 497 transitions. [2021-11-13 18:23:16,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:23:16,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 497 transitions. [2021-11-13 18:23:16,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.83333333333333) internal successors, (497), 6 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:16,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:16,511 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:16,511 INFO L186 Difference]: Start difference. First operand has 156 places, 221 transitions, 2608 flow. Second operand 6 states and 497 transitions. [2021-11-13 18:23:16,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 289 transitions, 3725 flow [2021-11-13 18:23:16,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 289 transitions, 3595 flow, removed 24 selfloop flow, removed 2 redundant places. [2021-11-13 18:23:16,746 INFO L242 Difference]: Finished difference. Result has 162 places, 246 transitions, 3129 flow [2021-11-13 18:23:16,747 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=2495, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3129, PETRI_PLACES=162, PETRI_TRANSITIONS=246} [2021-11-13 18:23:16,748 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 76 predicate places. [2021-11-13 18:23:16,748 INFO L470 AbstractCegarLoop]: Abstraction has has 162 places, 246 transitions, 3129 flow [2021-11-13 18:23:16,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:16,749 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:23:16,749 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:16,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 18:23:16,749 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-13 18:23:16,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:16,750 INFO L85 PathProgramCache]: Analyzing trace with hash -269599124, now seen corresponding path program 4 times [2021-11-13 18:23:16,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:16,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886979492] [2021-11-13 18:23:16,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:16,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:16,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:16,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:16,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:16,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886979492] [2021-11-13 18:23:16,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886979492] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:23:16,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:23:16,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:23:16,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243479495] [2021-11-13 18:23:16,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:16,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:23:16,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:16,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:23:16,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:23:16,982 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2021-11-13 18:23:16,983 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 246 transitions, 3129 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:16,983 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:23:16,983 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2021-11-13 18:23:16,983 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:23:18,017 INFO L129 PetriNetUnfolder]: 1679/4138 cut-off events. [2021-11-13 18:23:18,017 INFO L130 PetriNetUnfolder]: For 32976/33718 co-relation queries the response was YES. [2021-11-13 18:23:18,080 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21039 conditions, 4138 events. 1679/4138 cut-off events. For 32976/33718 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 35441 event pairs, 229 based on Foata normal form. 146/4174 useless extension candidates. Maximal degree in co-relation 20996. Up to 1331 conditions per place. [2021-11-13 18:23:18,130 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 106 selfloop transitions, 109 changer transitions 3/299 dead transitions. [2021-11-13 18:23:18,130 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 299 transitions, 4228 flow [2021-11-13 18:23:18,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:23:18,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-13 18:23:18,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 493 transitions. [2021-11-13 18:23:18,134 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8470790378006873 [2021-11-13 18:23:18,134 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 493 transitions. [2021-11-13 18:23:18,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 493 transitions. [2021-11-13 18:23:18,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:23:18,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 493 transitions. [2021-11-13 18:23:18,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.16666666666667) internal successors, (493), 6 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:18,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:18,142 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:18,142 INFO L186 Difference]: Start difference. First operand has 162 places, 246 transitions, 3129 flow. Second operand 6 states and 493 transitions. [2021-11-13 18:23:18,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 299 transitions, 4228 flow [2021-11-13 18:23:18,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 299 transitions, 4200 flow, removed 14 selfloop flow, removed 0 redundant places. [2021-11-13 18:23:18,383 INFO L242 Difference]: Finished difference. Result has 169 places, 257 transitions, 3584 flow [2021-11-13 18:23:18,384 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=3033, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3584, PETRI_PLACES=169, PETRI_TRANSITIONS=257} [2021-11-13 18:23:18,385 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 83 predicate places. [2021-11-13 18:23:18,385 INFO L470 AbstractCegarLoop]: Abstraction has has 169 places, 257 transitions, 3584 flow [2021-11-13 18:23:18,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:18,386 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:23:18,386 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:18,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 18:23:18,387 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-13 18:23:18,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:18,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1389208682, now seen corresponding path program 5 times [2021-11-13 18:23:18,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:18,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865347670] [2021-11-13 18:23:18,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:18,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:18,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:18,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:18,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:18,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865347670] [2021-11-13 18:23:18,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865347670] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:23:18,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539698229] [2021-11-13 18:23:18,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:23:18,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:23:18,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:23:18,602 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:23:18,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:23:18,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:23:18,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:23:18,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 18:23:18,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:23:19,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:19,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:23:19,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:19,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539698229] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 18:23:19,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:23:19,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2021-11-13 18:23:19,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541707786] [2021-11-13 18:23:19,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:19,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:23:19,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:19,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:23:19,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:23:19,481 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2021-11-13 18:23:19,482 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 257 transitions, 3584 flow. Second operand has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:19,482 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:23:19,482 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2021-11-13 18:23:19,483 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:23:21,714 INFO L129 PetriNetUnfolder]: 3778/8821 cut-off events. [2021-11-13 18:23:21,714 INFO L130 PetriNetUnfolder]: For 74503/74503 co-relation queries the response was YES. [2021-11-13 18:23:21,780 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45220 conditions, 8821 events. 3778/8821 cut-off events. For 74503/74503 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 83039 event pairs, 274 based on Foata normal form. 36/8753 useless extension candidates. Maximal degree in co-relation 45174. Up to 1704 conditions per place. [2021-11-13 18:23:21,863 INFO L132 encePairwiseOnDemand]: 82/97 looper letters, 317 selfloop transitions, 153 changer transitions 5/530 dead transitions. [2021-11-13 18:23:21,864 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 530 transitions, 8528 flow [2021-11-13 18:23:21,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:23:21,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-13 18:23:21,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 573 transitions. [2021-11-13 18:23:21,868 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8438880706921944 [2021-11-13 18:23:21,868 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 573 transitions. [2021-11-13 18:23:21,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 573 transitions. [2021-11-13 18:23:21,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:23:21,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 573 transitions. [2021-11-13 18:23:21,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 81.85714285714286) internal successors, (573), 7 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:21,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:21,876 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:21,876 INFO L186 Difference]: Start difference. First operand has 169 places, 257 transitions, 3584 flow. Second operand 7 states and 573 transitions. [2021-11-13 18:23:21,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 530 transitions, 8528 flow [2021-11-13 18:23:22,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 530 transitions, 8462 flow, removed 33 selfloop flow, removed 0 redundant places. [2021-11-13 18:23:22,433 INFO L242 Difference]: Finished difference. Result has 180 places, 376 transitions, 6028 flow [2021-11-13 18:23:22,434 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=3564, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6028, PETRI_PLACES=180, PETRI_TRANSITIONS=376} [2021-11-13 18:23:22,435 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 94 predicate places. [2021-11-13 18:23:22,435 INFO L470 AbstractCegarLoop]: Abstraction has has 180 places, 376 transitions, 6028 flow [2021-11-13 18:23:22,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:22,436 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:23:22,436 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:22,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:23:22,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-13 18:23:22,637 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-13 18:23:22,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:22,638 INFO L85 PathProgramCache]: Analyzing trace with hash -645228060, now seen corresponding path program 6 times [2021-11-13 18:23:22,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:22,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630683252] [2021-11-13 18:23:22,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:22,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:22,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:22,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:22,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:22,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630683252] [2021-11-13 18:23:22,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630683252] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:23:22,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920948871] [2021-11-13 18:23:22,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:23:22,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:23:22,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:23:22,810 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:23:22,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:23:22,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-13 18:23:22,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:23:22,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 18:23:22,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:23:23,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:23,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:23:23,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:23,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920948871] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 18:23:23,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:23:23,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2021-11-13 18:23:23,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861261392] [2021-11-13 18:23:23,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:23,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:23:23,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:23,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:23:23,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:23:23,708 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2021-11-13 18:23:23,708 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 376 transitions, 6028 flow. Second operand has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:23,709 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:23:23,709 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2021-11-13 18:23:23,709 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:23:26,275 INFO L129 PetriNetUnfolder]: 3938/9472 cut-off events. [2021-11-13 18:23:26,275 INFO L130 PetriNetUnfolder]: For 105410/105443 co-relation queries the response was YES. [2021-11-13 18:23:26,347 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53775 conditions, 9472 events. 3938/9472 cut-off events. For 105410/105443 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 91717 event pairs, 609 based on Foata normal form. 20/9307 useless extension candidates. Maximal degree in co-relation 53724. Up to 2679 conditions per place. [2021-11-13 18:23:26,438 INFO L132 encePairwiseOnDemand]: 82/97 looper letters, 265 selfloop transitions, 190 changer transitions 4/514 dead transitions. [2021-11-13 18:23:26,438 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 514 transitions, 8897 flow [2021-11-13 18:23:26,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:23:26,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-13 18:23:26,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 570 transitions. [2021-11-13 18:23:26,443 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8394698085419735 [2021-11-13 18:23:26,443 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 570 transitions. [2021-11-13 18:23:26,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 570 transitions. [2021-11-13 18:23:26,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:23:26,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 570 transitions. [2021-11-13 18:23:26,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 81.42857142857143) internal successors, (570), 7 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:26,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:26,450 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:26,450 INFO L186 Difference]: Start difference. First operand has 180 places, 376 transitions, 6028 flow. Second operand 7 states and 570 transitions. [2021-11-13 18:23:26,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 514 transitions, 8897 flow [2021-11-13 18:23:27,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 514 transitions, 8827 flow, removed 35 selfloop flow, removed 0 redundant places. [2021-11-13 18:23:27,041 INFO L242 Difference]: Finished difference. Result has 192 places, 408 transitions, 7285 flow [2021-11-13 18:23:27,041 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=5974, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7285, PETRI_PLACES=192, PETRI_TRANSITIONS=408} [2021-11-13 18:23:27,042 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 106 predicate places. [2021-11-13 18:23:27,042 INFO L470 AbstractCegarLoop]: Abstraction has has 192 places, 408 transitions, 7285 flow [2021-11-13 18:23:27,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:27,043 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:23:27,043 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:27,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-13 18:23:27,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-13 18:23:27,258 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-13 18:23:27,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:27,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1168666102, now seen corresponding path program 7 times [2021-11-13 18:23:27,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:27,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293545108] [2021-11-13 18:23:27,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:27,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:27,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:27,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:27,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:27,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293545108] [2021-11-13 18:23:27,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293545108] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:23:27,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:23:27,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:23:27,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528391711] [2021-11-13 18:23:27,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:27,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:23:27,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:27,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:23:27,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:23:27,509 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2021-11-13 18:23:27,510 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 408 transitions, 7285 flow. Second operand has 6 states, 6 states have (on average 75.5) internal successors, (453), 6 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:27,510 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:23:27,510 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2021-11-13 18:23:27,510 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:23:30,099 INFO L129 PetriNetUnfolder]: 3187/8291 cut-off events. [2021-11-13 18:23:30,100 INFO L130 PetriNetUnfolder]: For 120846/122884 co-relation queries the response was YES. [2021-11-13 18:23:30,168 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51683 conditions, 8291 events. 3187/8291 cut-off events. For 120846/122884 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 82703 event pairs, 318 based on Foata normal form. 214/8298 useless extension candidates. Maximal degree in co-relation 51626. Up to 1795 conditions per place. [2021-11-13 18:23:30,226 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 172 selfloop transitions, 221 changer transitions 2/516 dead transitions. [2021-11-13 18:23:30,226 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 516 transitions, 9957 flow [2021-11-13 18:23:30,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:23:30,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-13 18:23:30,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 580 transitions. [2021-11-13 18:23:30,229 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8541973490427098 [2021-11-13 18:23:30,230 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 580 transitions. [2021-11-13 18:23:30,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 580 transitions. [2021-11-13 18:23:30,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:23:30,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 580 transitions. [2021-11-13 18:23:30,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 82.85714285714286) internal successors, (580), 7 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:30,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:30,237 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:30,237 INFO L186 Difference]: Start difference. First operand has 192 places, 408 transitions, 7285 flow. Second operand 7 states and 580 transitions. [2021-11-13 18:23:30,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 516 transitions, 9957 flow [2021-11-13 18:23:30,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 516 transitions, 9949 flow, removed 4 selfloop flow, removed 0 redundant places. [2021-11-13 18:23:30,775 INFO L242 Difference]: Finished difference. Result has 199 places, 442 transitions, 8677 flow [2021-11-13 18:23:30,776 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=7277, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8677, PETRI_PLACES=199, PETRI_TRANSITIONS=442} [2021-11-13 18:23:30,777 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 113 predicate places. [2021-11-13 18:23:30,777 INFO L470 AbstractCegarLoop]: Abstraction has has 199 places, 442 transitions, 8677 flow [2021-11-13 18:23:30,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 75.5) internal successors, (453), 6 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:30,778 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:23:30,778 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:30,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-13 18:23:30,778 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-13 18:23:30,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:30,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1061253708, now seen corresponding path program 8 times [2021-11-13 18:23:30,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:30,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610244180] [2021-11-13 18:23:30,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:30,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:30,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:30,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:30,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:30,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610244180] [2021-11-13 18:23:30,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610244180] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:23:30,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:23:30,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:23:30,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215533073] [2021-11-13 18:23:30,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:30,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:23:30,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:30,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:23:30,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:23:30,946 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2021-11-13 18:23:30,947 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 442 transitions, 8677 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:30,947 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:23:30,948 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2021-11-13 18:23:30,948 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:23:33,843 INFO L129 PetriNetUnfolder]: 3232/8453 cut-off events. [2021-11-13 18:23:33,843 INFO L130 PetriNetUnfolder]: For 130943/132942 co-relation queries the response was YES. [2021-11-13 18:23:33,918 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54205 conditions, 8453 events. 3232/8453 cut-off events. For 130943/132942 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 84861 event pairs, 252 based on Foata normal form. 206/8513 useless extension candidates. Maximal degree in co-relation 54146. Up to 2123 conditions per place. [2021-11-13 18:23:33,978 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 234 selfloop transitions, 169 changer transitions 0/524 dead transitions. [2021-11-13 18:23:33,978 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 524 transitions, 10952 flow [2021-11-13 18:23:33,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:23:33,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-11-13 18:23:33,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 415 transitions. [2021-11-13 18:23:33,988 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8556701030927835 [2021-11-13 18:23:33,988 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 415 transitions. [2021-11-13 18:23:33,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 415 transitions. [2021-11-13 18:23:33,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:23:33,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 415 transitions. [2021-11-13 18:23:33,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:33,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:33,998 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:34,000 INFO L186 Difference]: Start difference. First operand has 199 places, 442 transitions, 8677 flow. Second operand 5 states and 415 transitions. [2021-11-13 18:23:34,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 524 transitions, 10952 flow [2021-11-13 18:23:34,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 524 transitions, 10649 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-13 18:23:34,564 INFO L242 Difference]: Finished difference. Result has 201 places, 463 transitions, 9307 flow [2021-11-13 18:23:34,565 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=8400, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=9307, PETRI_PLACES=201, PETRI_TRANSITIONS=463} [2021-11-13 18:23:34,566 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 115 predicate places. [2021-11-13 18:23:34,566 INFO L470 AbstractCegarLoop]: Abstraction has has 201 places, 463 transitions, 9307 flow [2021-11-13 18:23:34,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:34,567 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:23:34,567 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:34,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-13 18:23:34,568 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-13 18:23:34,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:34,568 INFO L85 PathProgramCache]: Analyzing trace with hash 2052972254, now seen corresponding path program 9 times [2021-11-13 18:23:34,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:34,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559949807] [2021-11-13 18:23:34,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:34,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:34,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:34,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:34,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:34,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559949807] [2021-11-13 18:23:34,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559949807] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:23:34,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820649318] [2021-11-13 18:23:34,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:23:34,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:23:34,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:23:34,736 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:23:34,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:23:34,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-13 18:23:34,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:23:34,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 18:23:34,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:23:35,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:35,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:23:37,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:37,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820649318] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:23:37,052 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:23:37,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2021-11-13 18:23:37,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538810875] [2021-11-13 18:23:37,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:23:37,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-13 18:23:37,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:37,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-13 18:23:37,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:23:37,056 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2021-11-13 18:23:37,058 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 463 transitions, 9307 flow. Second operand has 16 states, 16 states have (on average 67.875) internal successors, (1086), 16 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:37,058 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:23:37,059 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2021-11-13 18:23:37,059 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:23:44,286 INFO L129 PetriNetUnfolder]: 8559/20315 cut-off events. [2021-11-13 18:23:44,286 INFO L130 PetriNetUnfolder]: For 348910/350199 co-relation queries the response was YES. [2021-11-13 18:23:44,485 INFO L84 FinitePrefix]: Finished finitePrefix Result has 133345 conditions, 20315 events. 8559/20315 cut-off events. For 348910/350199 co-relation queries the response was YES. Maximal size of possible extension queue 1514. Compared 223863 event pairs, 1098 based on Foata normal form. 520/20426 useless extension candidates. Maximal degree in co-relation 133283. Up to 4997 conditions per place. [2021-11-13 18:23:44,632 INFO L132 encePairwiseOnDemand]: 84/97 looper letters, 706 selfloop transitions, 247 changer transitions 22/1078 dead transitions. [2021-11-13 18:23:44,632 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 1078 transitions, 23450 flow [2021-11-13 18:23:44,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 18:23:44,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-11-13 18:23:44,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1098 transitions. [2021-11-13 18:23:44,636 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7546391752577319 [2021-11-13 18:23:44,636 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1098 transitions. [2021-11-13 18:23:44,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1098 transitions. [2021-11-13 18:23:44,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:23:44,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1098 transitions. [2021-11-13 18:23:44,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 73.2) internal successors, (1098), 15 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:44,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 97.0) internal successors, (1552), 16 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:44,646 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 97.0) internal successors, (1552), 16 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:44,646 INFO L186 Difference]: Start difference. First operand has 201 places, 463 transitions, 9307 flow. Second operand 15 states and 1098 transitions. [2021-11-13 18:23:44,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 1078 transitions, 23450 flow [2021-11-13 18:23:46,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 1078 transitions, 22768 flow, removed 26 selfloop flow, removed 2 redundant places. [2021-11-13 18:23:46,398 INFO L242 Difference]: Finished difference. Result has 225 places, 637 transitions, 13620 flow [2021-11-13 18:23:46,399 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=9073, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=13620, PETRI_PLACES=225, PETRI_TRANSITIONS=637} [2021-11-13 18:23:46,399 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 139 predicate places. [2021-11-13 18:23:46,399 INFO L470 AbstractCegarLoop]: Abstraction has has 225 places, 637 transitions, 13620 flow [2021-11-13 18:23:46,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 67.875) internal successors, (1086), 16 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:46,401 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:23:46,401 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:46,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:23:46,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-13 18:23:46,625 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-13 18:23:46,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:46,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1372356922, now seen corresponding path program 10 times [2021-11-13 18:23:46,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:46,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480405349] [2021-11-13 18:23:46,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:46,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:46,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:46,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:46,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:46,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480405349] [2021-11-13 18:23:46,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480405349] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:23:46,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:23:46,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:23:46,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517232501] [2021-11-13 18:23:46,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:46,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:23:46,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:46,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:23:46,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:23:46,787 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-11-13 18:23:46,788 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 637 transitions, 13620 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:46,788 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:23:46,788 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-11-13 18:23:46,788 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:23:55,026 INFO L129 PetriNetUnfolder]: 8704/20939 cut-off events. [2021-11-13 18:23:55,026 INFO L130 PetriNetUnfolder]: For 416115/417238 co-relation queries the response was YES. [2021-11-13 18:23:55,301 INFO L84 FinitePrefix]: Finished finitePrefix Result has 147710 conditions, 20939 events. 8704/20939 cut-off events. For 416115/417238 co-relation queries the response was YES. Maximal size of possible extension queue 1570. Compared 234712 event pairs, 2175 based on Foata normal form. 194/20662 useless extension candidates. Maximal degree in co-relation 147637. Up to 12896 conditions per place. [2021-11-13 18:23:55,466 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 550 selfloop transitions, 79 changer transitions 14/752 dead transitions. [2021-11-13 18:23:55,466 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 752 transitions, 17355 flow [2021-11-13 18:23:55,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:23:55,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-13 18:23:55,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 487 transitions. [2021-11-13 18:23:55,468 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8367697594501718 [2021-11-13 18:23:55,468 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 487 transitions. [2021-11-13 18:23:55,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 487 transitions. [2021-11-13 18:23:55,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:23:55,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 487 transitions. [2021-11-13 18:23:55,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.16666666666667) internal successors, (487), 6 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) [2021-11-13 18:23:55,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:55,473 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:55,474 INFO L186 Difference]: Start difference. First operand has 225 places, 637 transitions, 13620 flow. Second operand 6 states and 487 transitions. [2021-11-13 18:23:55,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 752 transitions, 17355 flow [2021-11-13 18:23:57,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 752 transitions, 17191 flow, removed 81 selfloop flow, removed 3 redundant places. [2021-11-13 18:23:57,856 INFO L242 Difference]: Finished difference. Result has 227 places, 650 transitions, 14093 flow [2021-11-13 18:23:57,857 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=13484, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=14093, PETRI_PLACES=227, PETRI_TRANSITIONS=650} [2021-11-13 18:23:57,858 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 141 predicate places. [2021-11-13 18:23:57,858 INFO L470 AbstractCegarLoop]: Abstraction has has 227 places, 650 transitions, 14093 flow [2021-11-13 18:23:57,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:57,859 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:23:57,859 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:57,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-13 18:23:57,860 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-13 18:23:57,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:57,860 INFO L85 PathProgramCache]: Analyzing trace with hash -913313792, now seen corresponding path program 11 times [2021-11-13 18:23:57,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:23:57,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807494099] [2021-11-13 18:23:57,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:57,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:23:57,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:57,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:23:57,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:23:57,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807494099] [2021-11-13 18:23:57,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807494099] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:23:57,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:23:57,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:23:57,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137404297] [2021-11-13 18:23:57,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:57,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:23:57,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:23:57,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:23:57,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:23:57,960 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-11-13 18:23:57,961 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 650 transitions, 14093 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:23:57,961 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:23:57,962 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-11-13 18:23:57,962 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:24:05,911 INFO L129 PetriNetUnfolder]: 8628/20381 cut-off events. [2021-11-13 18:24:05,912 INFO L130 PetriNetUnfolder]: For 409367/410523 co-relation queries the response was YES. [2021-11-13 18:24:06,145 INFO L84 FinitePrefix]: Finished finitePrefix Result has 145489 conditions, 20381 events. 8628/20381 cut-off events. For 409367/410523 co-relation queries the response was YES. Maximal size of possible extension queue 1523. Compared 225037 event pairs, 2162 based on Foata normal form. 189/20085 useless extension candidates. Maximal degree in co-relation 145415. Up to 13104 conditions per place. [2021-11-13 18:24:06,303 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 469 selfloop transitions, 64 changer transitions 11/653 dead transitions. [2021-11-13 18:24:06,303 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 653 transitions, 15036 flow [2021-11-13 18:24:06,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:24:06,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-13 18:24:06,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 467 transitions. [2021-11-13 18:24:06,305 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.802405498281787 [2021-11-13 18:24:06,305 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 467 transitions. [2021-11-13 18:24:06,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 467 transitions. [2021-11-13 18:24:06,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:24:06,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 467 transitions. [2021-11-13 18:24:06,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 77.83333333333333) internal successors, (467), 6 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:06,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:06,309 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:06,309 INFO L186 Difference]: Start difference. First operand has 227 places, 650 transitions, 14093 flow. Second operand 6 states and 467 transitions. [2021-11-13 18:24:06,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 653 transitions, 15036 flow [2021-11-13 18:24:08,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 653 transitions, 14736 flow, removed 47 selfloop flow, removed 6 redundant places. [2021-11-13 18:24:08,594 INFO L242 Difference]: Finished difference. Result has 228 places, 640 transitions, 13643 flow [2021-11-13 18:24:08,595 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=13580, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=13643, PETRI_PLACES=228, PETRI_TRANSITIONS=640} [2021-11-13 18:24:08,596 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 142 predicate places. [2021-11-13 18:24:08,596 INFO L470 AbstractCegarLoop]: Abstraction has has 228 places, 640 transitions, 13643 flow [2021-11-13 18:24:08,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:08,597 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:24:08,597 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:24:08,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-13 18:24:08,598 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-13 18:24:08,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:08,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1535011892, now seen corresponding path program 1 times [2021-11-13 18:24:08,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:08,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423109185] [2021-11-13 18:24:08,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:08,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:08,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:08,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:08,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:24:08,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423109185] [2021-11-13 18:24:08,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423109185] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:24:08,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182526110] [2021-11-13 18:24:08,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:08,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:24:08,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:08,869 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:24:08,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 18:24:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:08,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 18:24:08,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:24:09,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:09,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:24:14,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:14,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182526110] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:24:14,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:24:14,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 19 [2021-11-13 18:24:14,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340240020] [2021-11-13 18:24:14,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:24:14,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 18:24:14,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:24:14,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 18:24:14,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=274, Unknown=2, NotChecked=0, Total=342 [2021-11-13 18:24:14,956 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2021-11-13 18:24:14,958 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 640 transitions, 13643 flow. Second operand has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:14,959 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:24:14,959 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2021-11-13 18:24:14,959 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:24:24,645 INFO L129 PetriNetUnfolder]: 8721/22887 cut-off events. [2021-11-13 18:24:24,645 INFO L130 PetriNetUnfolder]: For 458737/461669 co-relation queries the response was YES. [2021-11-13 18:24:24,919 INFO L84 FinitePrefix]: Finished finitePrefix Result has 160512 conditions, 22887 events. 8721/22887 cut-off events. For 458737/461669 co-relation queries the response was YES. Maximal size of possible extension queue 1751. Compared 270562 event pairs, 466 based on Foata normal form. 842/23301 useless extension candidates. Maximal degree in co-relation 160440. Up to 6892 conditions per place. [2021-11-13 18:24:25,086 INFO L132 encePairwiseOnDemand]: 83/97 looper letters, 722 selfloop transitions, 346 changer transitions 9/1218 dead transitions. [2021-11-13 18:24:25,086 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 1218 transitions, 28340 flow [2021-11-13 18:24:25,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 18:24:25,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-13 18:24:25,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1143 transitions. [2021-11-13 18:24:25,090 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7364690721649485 [2021-11-13 18:24:25,090 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1143 transitions. [2021-11-13 18:24:25,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1143 transitions. [2021-11-13 18:24:25,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:24:25,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1143 transitions. [2021-11-13 18:24:25,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 71.4375) internal successors, (1143), 16 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:25,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 97.0) internal successors, (1649), 17 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:25,099 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 97.0) internal successors, (1649), 17 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:25,099 INFO L186 Difference]: Start difference. First operand has 228 places, 640 transitions, 13643 flow. Second operand 16 states and 1143 transitions. [2021-11-13 18:24:25,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 1218 transitions, 28340 flow [2021-11-13 18:24:27,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 1218 transitions, 28088 flow, removed 24 selfloop flow, removed 8 redundant places. [2021-11-13 18:24:27,444 INFO L242 Difference]: Finished difference. Result has 239 places, 844 transitions, 18601 flow [2021-11-13 18:24:27,445 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=13415, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=18601, PETRI_PLACES=239, PETRI_TRANSITIONS=844} [2021-11-13 18:24:27,445 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 153 predicate places. [2021-11-13 18:24:27,445 INFO L470 AbstractCegarLoop]: Abstraction has has 239 places, 844 transitions, 18601 flow [2021-11-13 18:24:27,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:27,446 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:24:27,446 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:24:27,474 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-13 18:24:27,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:24:27,655 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-13 18:24:27,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:27,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1086034900, now seen corresponding path program 2 times [2021-11-13 18:24:27,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:27,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558165565] [2021-11-13 18:24:27,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:27,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:27,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:28,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:28,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:24:28,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558165565] [2021-11-13 18:24:28,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558165565] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:24:28,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553747738] [2021-11-13 18:24:28,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:24:28,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:24:28,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:28,096 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:24:28,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 18:24:28,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:24:28,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:24:28,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 18:24:28,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:24:28,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:28,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:24:29,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:29,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553747738] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:24:29,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:24:29,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 17 [2021-11-13 18:24:29,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281828605] [2021-11-13 18:24:29,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:24:29,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 18:24:29,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:24:29,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 18:24:29,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-11-13 18:24:29,955 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2021-11-13 18:24:29,957 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 844 transitions, 18601 flow. Second operand has 17 states, 17 states have (on average 67.05882352941177) internal successors, (1140), 17 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:29,957 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:24:29,957 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2021-11-13 18:24:29,957 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:24:40,057 INFO L129 PetriNetUnfolder]: 9841/25585 cut-off events. [2021-11-13 18:24:40,058 INFO L130 PetriNetUnfolder]: For 570497/573488 co-relation queries the response was YES. [2021-11-13 18:24:40,397 INFO L84 FinitePrefix]: Finished finitePrefix Result has 189955 conditions, 25585 events. 9841/25585 cut-off events. For 570497/573488 co-relation queries the response was YES. Maximal size of possible extension queue 2011. Compared 305902 event pairs, 1188 based on Foata normal form. 635/25545 useless extension candidates. Maximal degree in co-relation 189880. Up to 12804 conditions per place. [2021-11-13 18:24:40,909 INFO L132 encePairwiseOnDemand]: 87/97 looper letters, 633 selfloop transitions, 295 changer transitions 6/1075 dead transitions. [2021-11-13 18:24:40,909 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 1075 transitions, 25946 flow [2021-11-13 18:24:40,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:24:40,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-13 18:24:40,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 709 transitions. [2021-11-13 18:24:40,912 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7309278350515463 [2021-11-13 18:24:40,913 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 709 transitions. [2021-11-13 18:24:40,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 709 transitions. [2021-11-13 18:24:40,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:24:40,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 709 transitions. [2021-11-13 18:24:40,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 70.9) internal successors, (709), 10 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:40,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 97.0) internal successors, (1067), 11 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:40,918 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 97.0) internal successors, (1067), 11 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:40,918 INFO L186 Difference]: Start difference. First operand has 239 places, 844 transitions, 18601 flow. Second operand 10 states and 709 transitions. [2021-11-13 18:24:40,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 1075 transitions, 25946 flow [2021-11-13 18:24:45,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 1075 transitions, 25367 flow, removed 243 selfloop flow, removed 6 redundant places. [2021-11-13 18:24:45,385 INFO L242 Difference]: Finished difference. Result has 244 places, 978 transitions, 22387 flow [2021-11-13 18:24:45,386 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=18092, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=844, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=22387, PETRI_PLACES=244, PETRI_TRANSITIONS=978} [2021-11-13 18:24:45,387 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 158 predicate places. [2021-11-13 18:24:45,387 INFO L470 AbstractCegarLoop]: Abstraction has has 244 places, 978 transitions, 22387 flow [2021-11-13 18:24:45,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 67.05882352941177) internal successors, (1140), 17 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:45,388 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-13 18:24:45,388 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:24:45,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:45,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:24:45,589 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-11-13 18:24:45,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:45,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1081059474, now seen corresponding path program 3 times [2021-11-13 18:24:45,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:45,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989977997] [2021-11-13 18:24:45,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:45,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:45,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:45,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:45,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:24:45,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989977997] [2021-11-13 18:24:45,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989977997] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:24:45,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867642391] [2021-11-13 18:24:45,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:24:45,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:24:45,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:45,922 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:24:45,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9f81ec0-8fe2-4a5b-b12f-135220c4e225/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 18:24:46,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-13 18:24:46,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:24:46,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 18:24:46,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:24:46,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:46,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:24:55,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:55,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867642391] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:24:55,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:24:55,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2021-11-13 18:24:55,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667021145] [2021-11-13 18:24:55,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:24:55,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-13 18:24:55,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:24:55,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-13 18:24:55,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=235, Unknown=3, NotChecked=0, Total=306 [2021-11-13 18:24:55,495 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 97 [2021-11-13 18:24:55,497 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 978 transitions, 22387 flow. Second operand has 18 states, 18 states have (on average 65.61111111111111) internal successors, (1181), 18 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:55,497 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-13 18:24:55,498 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 97 [2021-11-13 18:24:55,498 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-13 18:25:08,867 INFO L129 PetriNetUnfolder]: 11398/29222 cut-off events. [2021-11-13 18:25:08,867 INFO L130 PetriNetUnfolder]: For 640134/641666 co-relation queries the response was YES. [2021-11-13 18:25:09,254 INFO L84 FinitePrefix]: Finished finitePrefix Result has 216866 conditions, 29222 events. 11398/29222 cut-off events. For 640134/641666 co-relation queries the response was YES. Maximal size of possible extension queue 2405. Compared 356771 event pairs, 741 based on Foata normal form. 504/29217 useless extension candidates. Maximal degree in co-relation 216789. Up to 12345 conditions per place. [2021-11-13 18:25:09,489 INFO L132 encePairwiseOnDemand]: 82/97 looper letters, 820 selfloop transitions, 468 changer transitions 11/1386 dead transitions. [2021-11-13 18:25:09,489 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 1386 transitions, 33437 flow [2021-11-13 18:25:09,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 18:25:09,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-11-13 18:25:09,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1050 transitions. [2021-11-13 18:25:09,493 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7216494845360825 [2021-11-13 18:25:09,493 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1050 transitions. [2021-11-13 18:25:09,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1050 transitions. [2021-11-13 18:25:09,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-13 18:25:09,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1050 transitions. [2021-11-13 18:25:09,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 70.0) internal successors, (1050), 15 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:09,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 97.0) internal successors, (1552), 16 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:09,501 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 97.0) internal successors, (1552), 16 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:09,501 INFO L186 Difference]: Start difference. First operand has 244 places, 978 transitions, 22387 flow. Second operand 15 states and 1050 transitions. [2021-11-13 18:25:09,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 1386 transitions, 33437 flow