./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G --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 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 12:22:57,241 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 12:22:57,244 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 12:22:57,309 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 12:22:57,310 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 12:22:57,316 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 12:22:57,318 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 12:22:57,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 12:22:57,323 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 12:22:57,324 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 12:22:57,326 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 12:22:57,327 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 12:22:57,328 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 12:22:57,330 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 12:22:57,332 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 12:22:57,334 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 12:22:57,335 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 12:22:57,337 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 12:22:57,339 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 12:22:57,343 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 12:22:57,345 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 12:22:57,347 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 12:22:57,349 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 12:22:57,351 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 12:22:57,355 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 12:22:57,356 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 12:22:57,356 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 12:22:57,358 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 12:22:57,359 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 12:22:57,360 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 12:22:57,361 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 12:22:57,362 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 12:22:57,363 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 12:22:57,364 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 12:22:57,366 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 12:22:57,366 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 12:22:57,368 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 12:22:57,368 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 12:22:57,369 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 12:22:57,370 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 12:22:57,371 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 12:22:57,372 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 12:22:57,398 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 12:22:57,399 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 12:22:57,399 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 12:22:57,400 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 12:22:57,401 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 12:22:57,402 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 12:22:57,402 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 12:22:57,402 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 12:22:57,403 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 12:22:57,403 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 12:22:57,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 12:22:57,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 12:22:57,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 12:22:57,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 12:22:57,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 12:22:57,405 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 12:22:57,406 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 12:22:57,406 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 12:22:57,406 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 12:22:57,407 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 12:22:57,407 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 12:22:57,407 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 12:22:57,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:22:57,408 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 12:22:57,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 12:22:57,409 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 12:22:57,409 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 12:22:57,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 12:22:57,410 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 12:22:57,410 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 12:22:57,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 12:22:57,411 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 12:22:57,411 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_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 [2021-11-23 12:22:57,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 12:22:57,759 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 12:22:57,762 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 12:22:57,763 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 12:22:57,764 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 12:22:57,766 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2021-11-23 12:22:57,844 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/data/24eb66f32/fb89f89673da41109e92cda186ed8d1d/FLAG962c2b5cc [2021-11-23 12:22:58,389 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 12:22:58,389 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2021-11-23 12:22:58,398 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/data/24eb66f32/fb89f89673da41109e92cda186ed8d1d/FLAG962c2b5cc [2021-11-23 12:22:58,712 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/data/24eb66f32/fb89f89673da41109e92cda186ed8d1d [2021-11-23 12:22:58,714 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 12:22:58,715 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 12:22:58,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 12:22:58,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 12:22:58,721 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 12:22:58,721 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:22:58" (1/1) ... [2021-11-23 12:22:58,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ce25374 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:58, skipping insertion in model container [2021-11-23 12:22:58,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:22:58" (1/1) ... [2021-11-23 12:22:58,730 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 12:22:58,749 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:22:58,974 WARN L230 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_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2021-11-23 12:22:58,988 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:22:58,998 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 12:22:59,022 WARN L230 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_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2021-11-23 12:22:59,029 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:22:59,056 INFO L208 MainTranslator]: Completed translation [2021-11-23 12:22:59,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:59 WrapperNode [2021-11-23 12:22:59,058 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 12:22:59,060 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 12:22:59,060 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 12:22:59,061 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 12:22:59,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:59" (1/1) ... [2021-11-23 12:22:59,092 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:59" (1/1) ... [2021-11-23 12:22:59,135 INFO L137 Inliner]: procedures = 26, calls = 36, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 138 [2021-11-23 12:22:59,135 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 12:22:59,136 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 12:22:59,136 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 12:22:59,137 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 12:22:59,145 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:59" (1/1) ... [2021-11-23 12:22:59,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:59" (1/1) ... [2021-11-23 12:22:59,161 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:59" (1/1) ... [2021-11-23 12:22:59,165 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:59" (1/1) ... [2021-11-23 12:22:59,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:59" (1/1) ... [2021-11-23 12:22:59,186 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:59" (1/1) ... [2021-11-23 12:22:59,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:59" (1/1) ... [2021-11-23 12:22:59,199 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 12:22:59,201 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 12:22:59,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 12:22:59,201 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 12:22:59,202 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:59" (1/1) ... [2021-11-23 12:22:59,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:22:59,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:22:59,250 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 12:22:59,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 12:22:59,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 12:22:59,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 12:22:59,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 12:22:59,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 12:22:59,311 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-23 12:22:59,312 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-23 12:22:59,312 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-23 12:22:59,312 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-23 12:22:59,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 12:22:59,312 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-23 12:22:59,313 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-23 12:22:59,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 12:22:59,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 12:22:59,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 12:22:59,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 12:22:59,315 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-23 12:22:59,409 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 12:22:59,411 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 12:22:59,728 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 12:22:59,841 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 12:22:59,841 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 12:22:59,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:22:59 BoogieIcfgContainer [2021-11-23 12:22:59,844 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 12:22:59,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 12:22:59,846 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 12:22:59,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 12:22:59,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:22:58" (1/3) ... [2021-11-23 12:22:59,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49ae6b05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:22:59, skipping insertion in model container [2021-11-23 12:22:59,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:59" (2/3) ... [2021-11-23 12:22:59,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49ae6b05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:22:59, skipping insertion in model container [2021-11-23 12:22:59,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:22:59" (3/3) ... [2021-11-23 12:22:59,853 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2021-11-23 12:22:59,859 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-23 12:22:59,859 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 12:22:59,860 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 12:22:59,860 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-23 12:22:59,921 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,922 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,922 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,922 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,922 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,923 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,923 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,923 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,923 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,923 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,924 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,924 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,924 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,924 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,924 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,924 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,925 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,925 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,925 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,925 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,926 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,926 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,926 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,926 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,926 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,926 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,927 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,927 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,927 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,927 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,928 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,928 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,928 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,928 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,928 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,929 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,929 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,929 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,929 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,930 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,930 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,930 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,931 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,931 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,931 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,931 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,931 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,932 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,932 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,932 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,932 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,932 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,933 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,933 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,933 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,941 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,942 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,942 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,942 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,942 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,943 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,943 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,943 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,943 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,943 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,943 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,943 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,944 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,944 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,944 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,944 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,945 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,945 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,945 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,945 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,945 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,945 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,946 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,946 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,946 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,949 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,950 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,950 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,950 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,951 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,951 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,951 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,951 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,952 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,952 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,952 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,953 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,953 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,955 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,955 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,955 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,955 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,956 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,956 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,956 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,956 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,957 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,957 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,957 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,957 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,958 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:22:59,960 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-11-23 12:23:00,021 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 12:23:00,030 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 [2021-11-23 12:23:00,030 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-23 12:23:00,052 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 115 places, 117 transitions, 250 flow [2021-11-23 12:23:00,153 INFO L129 PetriNetUnfolder]: 9/115 cut-off events. [2021-11-23 12:23:00,153 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-23 12:23:00,161 INFO L84 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 115 events. 9/115 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs, 0 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 80. Up to 2 conditions per place. [2021-11-23 12:23:00,162 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 117 transitions, 250 flow [2021-11-23 12:23:00,175 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 106 transitions, 224 flow [2021-11-23 12:23:00,251 INFO L129 PetriNetUnfolder]: 9/105 cut-off events. [2021-11-23 12:23:00,252 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-23 12:23:00,252 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 12:23:00,253 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:23:00,254 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 12:23:00,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:23:00,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1137316496, now seen corresponding path program 1 times [2021-11-23 12:23:00,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:23:00,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420193926] [2021-11-23 12:23:00,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:00,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:23:00,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:00,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:23:00,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:23:00,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420193926] [2021-11-23 12:23:00,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420193926] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:23:00,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:23:00,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 12:23:00,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078884956] [2021-11-23 12:23:00,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:23:00,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 12:23:00,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:23:00,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 12:23:00,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 12:23:00,618 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 117 [2021-11-23 12:23:00,625 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 106 transitions, 224 flow. Second operand has 2 states, 2 states have (on average 107.5) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:00,626 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 12:23:00,626 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 117 [2021-11-23 12:23:00,628 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 12:23:00,712 INFO L129 PetriNetUnfolder]: 12/133 cut-off events. [2021-11-23 12:23:00,712 INFO L130 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2021-11-23 12:23:00,714 INFO L84 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 133 events. 12/133 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 166 event pairs, 3 based on Foata normal form. 13/135 useless extension candidates. Maximal degree in co-relation 78. Up to 19 conditions per place. [2021-11-23 12:23:00,716 INFO L132 encePairwiseOnDemand]: 111/117 looper letters, 6 selfloop transitions, 0 changer transitions 3/100 dead transitions. [2021-11-23 12:23:00,716 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 100 transitions, 224 flow [2021-11-23 12:23:00,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 12:23:00,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-23 12:23:00,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 220 transitions. [2021-11-23 12:23:00,733 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9401709401709402 [2021-11-23 12:23:00,734 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 220 transitions. [2021-11-23 12:23:00,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 220 transitions. [2021-11-23 12:23:00,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 12:23:00,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 220 transitions. [2021-11-23 12:23:00,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 110.0) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:00,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:00,752 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:00,754 INFO L186 Difference]: Start difference. First operand has 104 places, 106 transitions, 224 flow. Second operand 2 states and 220 transitions. [2021-11-23 12:23:00,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 100 transitions, 224 flow [2021-11-23 12:23:00,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 100 transitions, 216 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-23 12:23:00,765 INFO L242 Difference]: Finished difference. Result has 101 places, 97 transitions, 198 flow [2021-11-23 12:23:00,768 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=198, PETRI_PLACES=101, PETRI_TRANSITIONS=97} [2021-11-23 12:23:00,773 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, -3 predicate places. [2021-11-23 12:23:00,773 INFO L470 AbstractCegarLoop]: Abstraction has has 101 places, 97 transitions, 198 flow [2021-11-23 12:23:00,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 107.5) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:00,774 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 12:23:00,774 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:23:00,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 12:23:00,775 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 12:23:00,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:23:00,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1204015377, now seen corresponding path program 1 times [2021-11-23 12:23:00,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:23:00,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490187170] [2021-11-23 12:23:00,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:00,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:23:00,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:23:01,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:23:01,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490187170] [2021-11-23 12:23:01,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490187170] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:23:01,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:23:01,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:23:01,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145959701] [2021-11-23 12:23:01,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:23:01,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:23:01,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:23:01,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:23:01,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:23:01,116 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 117 [2021-11-23 12:23:01,118 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 97 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 91.4) internal successors, (457), 5 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:01,118 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 12:23:01,118 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 117 [2021-11-23 12:23:01,118 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 12:23:01,293 INFO L129 PetriNetUnfolder]: 13/150 cut-off events. [2021-11-23 12:23:01,300 INFO L130 PetriNetUnfolder]: For 7/8 co-relation queries the response was YES. [2021-11-23 12:23:01,301 INFO L84 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 150 events. 13/150 cut-off events. For 7/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 245 event pairs, 0 based on Foata normal form. 1/141 useless extension candidates. Maximal degree in co-relation 192. Up to 24 conditions per place. [2021-11-23 12:23:01,303 INFO L132 encePairwiseOnDemand]: 111/117 looper letters, 20 selfloop transitions, 3 changer transitions 4/105 dead transitions. [2021-11-23 12:23:01,305 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 105 transitions, 271 flow [2021-11-23 12:23:01,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:23:01,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-11-23 12:23:01,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 468 transitions. [2021-11-23 12:23:01,315 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8 [2021-11-23 12:23:01,316 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 468 transitions. [2021-11-23 12:23:01,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 468 transitions. [2021-11-23 12:23:01,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 12:23:01,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 468 transitions. [2021-11-23 12:23:01,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 93.6) internal successors, (468), 5 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) [2021-11-23 12:23:01,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 117.0) internal successors, (702), 6 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:01,345 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 117.0) internal successors, (702), 6 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:01,346 INFO L186 Difference]: Start difference. First operand has 101 places, 97 transitions, 198 flow. Second operand 5 states and 468 transitions. [2021-11-23 12:23:01,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 105 transitions, 271 flow [2021-11-23 12:23:01,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 105 transitions, 271 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-23 12:23:01,352 INFO L242 Difference]: Finished difference. Result has 105 places, 99 transitions, 221 flow [2021-11-23 12:23:01,353 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=105, PETRI_TRANSITIONS=99} [2021-11-23 12:23:01,354 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 1 predicate places. [2021-11-23 12:23:01,354 INFO L470 AbstractCegarLoop]: Abstraction has has 105 places, 99 transitions, 221 flow [2021-11-23 12:23:01,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.4) internal successors, (457), 5 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:01,355 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 12:23:01,355 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:23:01,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 12:23:01,356 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 12:23:01,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:23:01,357 INFO L85 PathProgramCache]: Analyzing trace with hash -791054983, now seen corresponding path program 1 times [2021-11-23 12:23:01,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:23:01,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385091998] [2021-11-23 12:23:01,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:01,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:23:01,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:01,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:23:01,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:23:01,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385091998] [2021-11-23 12:23:01,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385091998] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:23:01,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:23:01,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 12:23:01,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040581431] [2021-11-23 12:23:01,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:23:01,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 12:23:01,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:23:01,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 12:23:01,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:23:01,542 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 117 [2021-11-23 12:23:01,544 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 99 transitions, 221 flow. Second operand has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:01,544 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 12:23:01,544 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 117 [2021-11-23 12:23:01,544 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 12:23:01,833 INFO L129 PetriNetUnfolder]: 83/368 cut-off events. [2021-11-23 12:23:01,833 INFO L130 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2021-11-23 12:23:01,838 INFO L84 FinitePrefix]: Finished finitePrefix Result has 622 conditions, 368 events. 83/368 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1518 event pairs, 34 based on Foata normal form. 0/321 useless extension candidates. Maximal degree in co-relation 615. Up to 125 conditions per place. [2021-11-23 12:23:01,842 INFO L132 encePairwiseOnDemand]: 108/117 looper letters, 41 selfloop transitions, 8 changer transitions 0/119 dead transitions. [2021-11-23 12:23:01,842 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 119 transitions, 374 flow [2021-11-23 12:23:01,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 12:23:01,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-11-23 12:23:01,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 710 transitions. [2021-11-23 12:23:01,849 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7585470085470085 [2021-11-23 12:23:01,849 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 710 transitions. [2021-11-23 12:23:01,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 710 transitions. [2021-11-23 12:23:01,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 12:23:01,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 710 transitions. [2021-11-23 12:23:01,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 88.75) internal successors, (710), 8 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:01,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 117.0) internal successors, (1053), 9 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:01,860 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 117.0) internal successors, (1053), 9 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:01,861 INFO L186 Difference]: Start difference. First operand has 105 places, 99 transitions, 221 flow. Second operand 8 states and 710 transitions. [2021-11-23 12:23:01,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 119 transitions, 374 flow [2021-11-23 12:23:01,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 119 transitions, 365 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-11-23 12:23:01,874 INFO L242 Difference]: Finished difference. Result has 110 places, 102 transitions, 250 flow [2021-11-23 12:23:01,875 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=250, PETRI_PLACES=110, PETRI_TRANSITIONS=102} [2021-11-23 12:23:01,878 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 6 predicate places. [2021-11-23 12:23:01,878 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 102 transitions, 250 flow [2021-11-23 12:23:01,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:01,879 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 12:23:01,880 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:23:01,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 12:23:01,881 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 12:23:01,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:23:01,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1100554709, now seen corresponding path program 1 times [2021-11-23 12:23:01,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:23:01,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548830001] [2021-11-23 12:23:01,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:01,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:23:01,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:02,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:23:02,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:23:02,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548830001] [2021-11-23 12:23:02,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548830001] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:23:02,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:23:02,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 12:23:02,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291661432] [2021-11-23 12:23:02,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:23:02,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 12:23:02,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:23:02,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 12:23:02,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:23:02,072 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 117 [2021-11-23 12:23:02,074 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 102 transitions, 250 flow. Second operand has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:02,074 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 12:23:02,074 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 117 [2021-11-23 12:23:02,074 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 12:23:02,287 INFO L129 PetriNetUnfolder]: 67/286 cut-off events. [2021-11-23 12:23:02,287 INFO L130 PetriNetUnfolder]: For 51/54 co-relation queries the response was YES. [2021-11-23 12:23:02,288 INFO L84 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 286 events. 67/286 cut-off events. For 51/54 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1008 event pairs, 36 based on Foata normal form. 3/268 useless extension candidates. Maximal degree in co-relation 502. Up to 124 conditions per place. [2021-11-23 12:23:02,292 INFO L132 encePairwiseOnDemand]: 108/117 looper letters, 27 selfloop transitions, 6 changer transitions 11/114 dead transitions. [2021-11-23 12:23:02,292 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 114 transitions, 365 flow [2021-11-23 12:23:02,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 12:23:02,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-11-23 12:23:02,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 706 transitions. [2021-11-23 12:23:02,296 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7542735042735043 [2021-11-23 12:23:02,296 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 706 transitions. [2021-11-23 12:23:02,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 706 transitions. [2021-11-23 12:23:02,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 12:23:02,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 706 transitions. [2021-11-23 12:23:02,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 88.25) internal successors, (706), 8 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:02,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 117.0) internal successors, (1053), 9 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:02,306 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 117.0) internal successors, (1053), 9 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:02,306 INFO L186 Difference]: Start difference. First operand has 110 places, 102 transitions, 250 flow. Second operand 8 states and 706 transitions. [2021-11-23 12:23:02,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 114 transitions, 365 flow [2021-11-23 12:23:02,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 114 transitions, 355 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-23 12:23:02,314 INFO L242 Difference]: Finished difference. Result has 115 places, 100 transitions, 244 flow [2021-11-23 12:23:02,315 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=244, PETRI_PLACES=115, PETRI_TRANSITIONS=100} [2021-11-23 12:23:02,316 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 11 predicate places. [2021-11-23 12:23:02,317 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 100 transitions, 244 flow [2021-11-23 12:23:02,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:02,318 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 12:23:02,318 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:23:02,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 12:23:02,318 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 12:23:02,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:23:02,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1474470436, now seen corresponding path program 1 times [2021-11-23 12:23:02,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:23:02,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146835614] [2021-11-23 12:23:02,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:02,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:23:02,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:02,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:23:02,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:23:02,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146835614] [2021-11-23 12:23:02,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146835614] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:23:02,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162469975] [2021-11-23 12:23:02,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:02,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:23:02,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:23:02,489 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:23:02,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 12:23:02,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:02,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 12:23:02,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:23:02,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:23:02,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:23:03,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:23:03,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162469975] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 12:23:03,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:23:03,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2021-11-23 12:23:03,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136745035] [2021-11-23 12:23:03,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:23:03,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 12:23:03,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:23:03,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 12:23:03,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-11-23 12:23:03,255 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 117 [2021-11-23 12:23:03,256 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 100 transitions, 244 flow. Second operand has 7 states, 7 states have (on average 86.28571428571429) internal successors, (604), 7 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:03,257 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 12:23:03,257 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 117 [2021-11-23 12:23:03,257 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 12:23:03,404 INFO L129 PetriNetUnfolder]: 58/226 cut-off events. [2021-11-23 12:23:03,405 INFO L130 PetriNetUnfolder]: For 57/57 co-relation queries the response was YES. [2021-11-23 12:23:03,406 INFO L84 FinitePrefix]: Finished finitePrefix Result has 442 conditions, 226 events. 58/226 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 635 event pairs, 13 based on Foata normal form. 8/229 useless extension candidates. Maximal degree in co-relation 432. Up to 65 conditions per place. [2021-11-23 12:23:03,408 INFO L132 encePairwiseOnDemand]: 109/117 looper letters, 30 selfloop transitions, 7 changer transitions 0/107 dead transitions. [2021-11-23 12:23:03,408 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 107 transitions, 341 flow [2021-11-23 12:23:03,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:23:03,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-23 12:23:03,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 615 transitions. [2021-11-23 12:23:03,412 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7509157509157509 [2021-11-23 12:23:03,412 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 615 transitions. [2021-11-23 12:23:03,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 615 transitions. [2021-11-23 12:23:03,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 12:23:03,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 615 transitions. [2021-11-23 12:23:03,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.85714285714286) internal successors, (615), 7 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:03,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:03,421 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:03,421 INFO L186 Difference]: Start difference. First operand has 115 places, 100 transitions, 244 flow. Second operand 7 states and 615 transitions. [2021-11-23 12:23:03,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 107 transitions, 341 flow [2021-11-23 12:23:03,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 107 transitions, 315 flow, removed 7 selfloop flow, removed 9 redundant places. [2021-11-23 12:23:03,426 INFO L242 Difference]: Finished difference. Result has 111 places, 102 transitions, 255 flow [2021-11-23 12:23:03,426 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=255, PETRI_PLACES=111, PETRI_TRANSITIONS=102} [2021-11-23 12:23:03,430 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 7 predicate places. [2021-11-23 12:23:03,430 INFO L470 AbstractCegarLoop]: Abstraction has has 111 places, 102 transitions, 255 flow [2021-11-23 12:23:03,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 86.28571428571429) internal successors, (604), 7 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:03,431 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 12:23:03,431 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:23:03,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-23 12:23:03,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:23:03,658 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 12:23:03,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:23:03,658 INFO L85 PathProgramCache]: Analyzing trace with hash 448445266, now seen corresponding path program 1 times [2021-11-23 12:23:03,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:23:03,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889790535] [2021-11-23 12:23:03,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:03,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:23:03,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:03,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:23:03,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:23:03,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889790535] [2021-11-23 12:23:03,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889790535] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:23:03,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449088494] [2021-11-23 12:23:03,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:03,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:23:03,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:23:03,798 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:23:03,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 12:23:03,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:03,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 12:23:03,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:23:04,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:23:04,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:23:04,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:23:04,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449088494] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 12:23:04,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:23:04,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2021-11-23 12:23:04,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087460852] [2021-11-23 12:23:04,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:23:04,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 12:23:04,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:23:04,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 12:23:04,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-11-23 12:23:04,411 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 117 [2021-11-23 12:23:04,413 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 102 transitions, 255 flow. Second operand has 7 states, 7 states have (on average 86.28571428571429) internal successors, (604), 7 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:04,413 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 12:23:04,413 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 117 [2021-11-23 12:23:04,413 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 12:23:04,537 INFO L129 PetriNetUnfolder]: 46/209 cut-off events. [2021-11-23 12:23:04,537 INFO L130 PetriNetUnfolder]: For 65/80 co-relation queries the response was YES. [2021-11-23 12:23:04,538 INFO L84 FinitePrefix]: Finished finitePrefix Result has 406 conditions, 209 events. 46/209 cut-off events. For 65/80 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 520 event pairs, 9 based on Foata normal form. 15/211 useless extension candidates. Maximal degree in co-relation 397. Up to 54 conditions per place. [2021-11-23 12:23:04,540 INFO L132 encePairwiseOnDemand]: 109/117 looper letters, 32 selfloop transitions, 7 changer transitions 0/109 dead transitions. [2021-11-23 12:23:04,540 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 109 transitions, 360 flow [2021-11-23 12:23:04,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:23:04,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-23 12:23:04,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 615 transitions. [2021-11-23 12:23:04,544 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7509157509157509 [2021-11-23 12:23:04,544 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 615 transitions. [2021-11-23 12:23:04,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 615 transitions. [2021-11-23 12:23:04,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 12:23:04,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 615 transitions. [2021-11-23 12:23:04,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.85714285714286) internal successors, (615), 7 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:04,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:04,552 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:04,552 INFO L186 Difference]: Start difference. First operand has 111 places, 102 transitions, 255 flow. Second operand 7 states and 615 transitions. [2021-11-23 12:23:04,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 109 transitions, 360 flow [2021-11-23 12:23:04,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 109 transitions, 351 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-23 12:23:04,557 INFO L242 Difference]: Finished difference. Result has 115 places, 103 transitions, 274 flow [2021-11-23 12:23:04,558 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=274, PETRI_PLACES=115, PETRI_TRANSITIONS=103} [2021-11-23 12:23:04,559 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 11 predicate places. [2021-11-23 12:23:04,559 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 103 transitions, 274 flow [2021-11-23 12:23:04,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 86.28571428571429) internal successors, (604), 7 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:04,560 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 12:23:04,560 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:23:04,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 12:23:04,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 12:23:04,786 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 12:23:04,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:23:04,786 INFO L85 PathProgramCache]: Analyzing trace with hash 273222300, now seen corresponding path program 1 times [2021-11-23 12:23:04,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:23:04,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509758995] [2021-11-23 12:23:04,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:04,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:23:04,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:05,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:23:05,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:23:05,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509758995] [2021-11-23 12:23:05,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509758995] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:23:05,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921279555] [2021-11-23 12:23:05,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:05,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:23:05,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:23:05,146 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:23:05,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 12:23:05,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:05,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-23 12:23:05,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:23:05,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 12:23:06,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 12:23:06,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 12:23:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:23:06,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:23:06,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:23:06,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921279555] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:23:06,610 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:23:06,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 8] total 27 [2021-11-23 12:23:06,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499251058] [2021-11-23 12:23:06,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:23:06,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-23 12:23:06,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:23:06,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-23 12:23:06,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-11-23 12:23:06,617 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2021-11-23 12:23:06,619 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 103 transitions, 274 flow. Second operand has 27 states, 27 states have (on average 52.111111111111114) internal successors, (1407), 27 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:06,620 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 12:23:06,620 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2021-11-23 12:23:06,620 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 12:23:07,703 INFO L129 PetriNetUnfolder]: 325/771 cut-off events. [2021-11-23 12:23:07,703 INFO L130 PetriNetUnfolder]: For 504/504 co-relation queries the response was YES. [2021-11-23 12:23:07,706 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1867 conditions, 771 events. 325/771 cut-off events. For 504/504 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3865 event pairs, 96 based on Foata normal form. 1/764 useless extension candidates. Maximal degree in co-relation 1856. Up to 327 conditions per place. [2021-11-23 12:23:07,713 INFO L132 encePairwiseOnDemand]: 96/117 looper letters, 87 selfloop transitions, 29 changer transitions 4/162 dead transitions. [2021-11-23 12:23:07,713 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 162 transitions, 721 flow [2021-11-23 12:23:07,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 12:23:07,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-11-23 12:23:07,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1175 transitions. [2021-11-23 12:23:07,720 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4564879564879565 [2021-11-23 12:23:07,720 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1175 transitions. [2021-11-23 12:23:07,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1175 transitions. [2021-11-23 12:23:07,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 12:23:07,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1175 transitions. [2021-11-23 12:23:07,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 53.40909090909091) internal successors, (1175), 22 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:07,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 117.0) internal successors, (2691), 23 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:07,735 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 117.0) internal successors, (2691), 23 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:07,736 INFO L186 Difference]: Start difference. First operand has 115 places, 103 transitions, 274 flow. Second operand 22 states and 1175 transitions. [2021-11-23 12:23:07,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 162 transitions, 721 flow [2021-11-23 12:23:07,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 162 transitions, 703 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-11-23 12:23:07,745 INFO L242 Difference]: Finished difference. Result has 138 places, 118 transitions, 425 flow [2021-11-23 12:23:07,746 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=425, PETRI_PLACES=138, PETRI_TRANSITIONS=118} [2021-11-23 12:23:07,747 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 34 predicate places. [2021-11-23 12:23:07,747 INFO L470 AbstractCegarLoop]: Abstraction has has 138 places, 118 transitions, 425 flow [2021-11-23 12:23:07,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 52.111111111111114) internal successors, (1407), 27 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:07,748 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 12:23:07,748 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:23:07,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 12:23:07,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:23:07,974 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 12:23:07,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:23:07,974 INFO L85 PathProgramCache]: Analyzing trace with hash -618781634, now seen corresponding path program 2 times [2021-11-23 12:23:07,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:23:07,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823766042] [2021-11-23 12:23:07,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:07,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:23:08,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:08,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:23:08,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:23:08,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823766042] [2021-11-23 12:23:08,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823766042] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:23:08,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682902710] [2021-11-23 12:23:08,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:23:08,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:23:08,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:23:08,523 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:23:08,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 12:23:08,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:23:08,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:23:08,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-23 12:23:08,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:23:08,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:23:08,931 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 12:23:08,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-23 12:23:09,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 12:23:09,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 12:23:09,496 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 12:23:09,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 12:23:09,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:23:09,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:23:10,339 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_#t~pre11#1| Int) (|ULTIMATE.start_main_~#t2~0#1.offset| Int)) (= c_~counter~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base|) |ULTIMATE.start_main_~#t2~0#1.offset| |ULTIMATE.start_main_#t~pre11#1|)) c_~A~0.base) c_~A~0.offset))) is different from false [2021-11-23 12:23:11,434 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_#t~pre11#1| Int) (|ULTIMATE.start_main_~#t2~0#1.offset| Int)) (= (+ c_~counter~0 (select (select |c_#memory_int| c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork0_~i~0#1| 4) c_~A~0.offset))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base|) |ULTIMATE.start_main_~#t2~0#1.offset| |ULTIMATE.start_main_#t~pre11#1|)) c_~A~0.base) c_~A~0.offset))) is different from false [2021-11-23 12:23:12,250 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_#t~pre11#1| Int) (|ULTIMATE.start_main_~#t2~0#1.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base|) |ULTIMATE.start_main_~#t2~0#1.offset| |ULTIMATE.start_main_#t~pre11#1|)) c_~A~0.base) c_~A~0.offset) (+ c_~counter~0 (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset)))) is different from false [2021-11-23 12:23:13,285 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_#t~pre9#1| Int) (|ULTIMATE.start_main_~#t1~0#1.offset| Int) (|ULTIMATE.start_main_#t~pre11#1| Int) (|ULTIMATE.start_main_~#t2~0#1.offset| Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base|) |ULTIMATE.start_main_~#t1~0#1.offset| |ULTIMATE.start_main_#t~pre9#1|)))) (= (+ c_~counter~0 (select (select .cse0 c_~A~0.base) c_~A~0.offset)) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base|) |ULTIMATE.start_main_~#t2~0#1.offset| |ULTIMATE.start_main_#t~pre11#1|)) c_~A~0.base) c_~A~0.offset)))) is different from false [2021-11-23 12:23:40,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1550 treesize of output 1454 [2021-11-23 12:23:52,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2021-11-23 12:23:52,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-23 12:23:52,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682902710] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:23:52,904 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:23:52,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 17] total 41 [2021-11-23 12:23:52,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798099127] [2021-11-23 12:23:52,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:23:52,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-23 12:23:52,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:23:52,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-23 12:23:52,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1185, Unknown=23, NotChecked=292, Total=1640 [2021-11-23 12:23:52,913 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 117 [2021-11-23 12:23:52,916 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 118 transitions, 425 flow. Second operand has 41 states, 41 states have (on average 48.19512195121951) internal successors, (1976), 41 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:52,916 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 12:23:52,916 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 117 [2021-11-23 12:23:52,916 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 12:23:58,065 INFO L129 PetriNetUnfolder]: 471/1059 cut-off events. [2021-11-23 12:23:58,065 INFO L130 PetriNetUnfolder]: For 1238/1238 co-relation queries the response was YES. [2021-11-23 12:23:58,070 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2943 conditions, 1059 events. 471/1059 cut-off events. For 1238/1238 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6052 event pairs, 76 based on Foata normal form. 1/1051 useless extension candidates. Maximal degree in co-relation 2925. Up to 352 conditions per place. [2021-11-23 12:23:58,077 INFO L132 encePairwiseOnDemand]: 95/117 looper letters, 99 selfloop transitions, 50 changer transitions 4/192 dead transitions. [2021-11-23 12:23:58,077 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 192 transitions, 1036 flow [2021-11-23 12:23:58,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-23 12:23:58,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-11-23 12:23:58,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1174 transitions. [2021-11-23 12:23:58,084 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43626904496469715 [2021-11-23 12:23:58,084 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1174 transitions. [2021-11-23 12:23:58,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1174 transitions. [2021-11-23 12:23:58,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 12:23:58,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1174 transitions. [2021-11-23 12:23:58,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 51.04347826086956) internal successors, (1174), 23 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:58,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 117.0) internal successors, (2808), 24 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:58,097 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 117.0) internal successors, (2808), 24 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:58,097 INFO L186 Difference]: Start difference. First operand has 138 places, 118 transitions, 425 flow. Second operand 23 states and 1174 transitions. [2021-11-23 12:23:58,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 192 transitions, 1036 flow [2021-11-23 12:23:58,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 192 transitions, 960 flow, removed 20 selfloop flow, removed 14 redundant places. [2021-11-23 12:23:58,108 INFO L242 Difference]: Finished difference. Result has 147 places, 138 transitions, 621 flow [2021-11-23 12:23:58,108 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=621, PETRI_PLACES=147, PETRI_TRANSITIONS=138} [2021-11-23 12:23:58,110 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 43 predicate places. [2021-11-23 12:23:58,112 INFO L470 AbstractCegarLoop]: Abstraction has has 147 places, 138 transitions, 621 flow [2021-11-23 12:23:58,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 48.19512195121951) internal successors, (1976), 41 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:58,113 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 12:23:58,113 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:23:58,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 12:23:58,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:23:58,321 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 12:23:58,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:23:58,322 INFO L85 PathProgramCache]: Analyzing trace with hash -765311532, now seen corresponding path program 3 times [2021-11-23 12:23:58,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:23:58,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823043160] [2021-11-23 12:23:58,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:58,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:23:58,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:58,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:23:58,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:23:58,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823043160] [2021-11-23 12:23:58,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823043160] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:23:58,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498423537] [2021-11-23 12:23:58,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:23:58,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:23:58,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:23:58,678 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:23:58,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 12:23:58,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 12:23:58,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:23:58,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-23 12:23:58,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:23:59,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:23:59,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:23:59,304 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:23:59,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2021-11-23 12:23:59,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:23:59,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498423537] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:23:59,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:23:59,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 8] total 17 [2021-11-23 12:23:59,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042625047] [2021-11-23 12:23:59,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:23:59,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 12:23:59,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:23:59,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 12:23:59,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-11-23 12:23:59,560 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 117 [2021-11-23 12:23:59,561 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 138 transitions, 621 flow. Second operand has 17 states, 17 states have (on average 64.29411764705883) internal successors, (1093), 17 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:59,561 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 12:23:59,561 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 117 [2021-11-23 12:23:59,561 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 12:24:00,217 INFO L129 PetriNetUnfolder]: 586/1308 cut-off events. [2021-11-23 12:24:00,217 INFO L130 PetriNetUnfolder]: For 1954/1954 co-relation queries the response was YES. [2021-11-23 12:24:00,222 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3796 conditions, 1308 events. 586/1308 cut-off events. For 1954/1954 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 8357 event pairs, 146 based on Foata normal form. 1/1293 useless extension candidates. Maximal degree in co-relation 3777. Up to 783 conditions per place. [2021-11-23 12:24:00,232 INFO L132 encePairwiseOnDemand]: 100/117 looper letters, 104 selfloop transitions, 27 changer transitions 4/187 dead transitions. [2021-11-23 12:24:00,232 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 187 transitions, 1096 flow [2021-11-23 12:24:00,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 12:24:00,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-11-23 12:24:00,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1245 transitions. [2021-11-23 12:24:00,238 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5600539811066126 [2021-11-23 12:24:00,238 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1245 transitions. [2021-11-23 12:24:00,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1245 transitions. [2021-11-23 12:24:00,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 12:24:00,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1245 transitions. [2021-11-23 12:24:00,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 65.52631578947368) internal successors, (1245), 19 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:00,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 117.0) internal successors, (2340), 20 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:00,250 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 117.0) internal successors, (2340), 20 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:00,250 INFO L186 Difference]: Start difference. First operand has 147 places, 138 transitions, 621 flow. Second operand 19 states and 1245 transitions. [2021-11-23 12:24:00,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 187 transitions, 1096 flow [2021-11-23 12:24:00,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 187 transitions, 1004 flow, removed 32 selfloop flow, removed 14 redundant places. [2021-11-23 12:24:00,262 INFO L242 Difference]: Finished difference. Result has 154 places, 148 transitions, 689 flow [2021-11-23 12:24:00,263 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=557, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=689, PETRI_PLACES=154, PETRI_TRANSITIONS=148} [2021-11-23 12:24:00,264 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 50 predicate places. [2021-11-23 12:24:00,264 INFO L470 AbstractCegarLoop]: Abstraction has has 154 places, 148 transitions, 689 flow [2021-11-23 12:24:00,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 64.29411764705883) internal successors, (1093), 17 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:00,265 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 12:24:00,265 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:24:00,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 12:24:00,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:24:00,490 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 12:24:00,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:24:00,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1270727132, now seen corresponding path program 4 times [2021-11-23 12:24:00,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:24:00,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572620414] [2021-11-23 12:24:00,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:24:00,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:24:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:24:00,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:24:00,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:24:00,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572620414] [2021-11-23 12:24:00,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572620414] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:24:00,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693119097] [2021-11-23 12:24:00,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 12:24:00,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:24:00,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:24:00,814 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:24:00,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 12:24:00,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 12:24:00,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:24:00,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-23 12:24:00,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:24:01,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 12:24:01,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 12:24:01,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 12:24:01,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:24:01,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:24:01,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:24:01,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693119097] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:24:01,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:24:01,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 8] total 30 [2021-11-23 12:24:01,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605692865] [2021-11-23 12:24:01,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:24:01,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-23 12:24:01,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:24:01,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-23 12:24:01,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-11-23 12:24:01,994 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2021-11-23 12:24:01,996 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 148 transitions, 689 flow. Second operand has 30 states, 30 states have (on average 52.0) internal successors, (1560), 30 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:01,996 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 12:24:01,996 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2021-11-23 12:24:01,996 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 12:24:03,501 INFO L129 PetriNetUnfolder]: 701/1559 cut-off events. [2021-11-23 12:24:03,501 INFO L130 PetriNetUnfolder]: For 2243/2243 co-relation queries the response was YES. [2021-11-23 12:24:03,505 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4493 conditions, 1559 events. 701/1559 cut-off events. For 2243/2243 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 10363 event pairs, 164 based on Foata normal form. 1/1545 useless extension candidates. Maximal degree in co-relation 4471. Up to 806 conditions per place. [2021-11-23 12:24:03,516 INFO L132 encePairwiseOnDemand]: 96/117 looper letters, 115 selfloop transitions, 45 changer transitions 4/206 dead transitions. [2021-11-23 12:24:03,517 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 206 transitions, 1257 flow [2021-11-23 12:24:03,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 12:24:03,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-11-23 12:24:03,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1275 transitions. [2021-11-23 12:24:03,522 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.45405982905982906 [2021-11-23 12:24:03,522 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1275 transitions. [2021-11-23 12:24:03,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1275 transitions. [2021-11-23 12:24:03,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 12:24:03,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1275 transitions. [2021-11-23 12:24:03,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 53.125) internal successors, (1275), 24 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:03,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 117.0) internal successors, (2925), 25 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:03,533 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 117.0) internal successors, (2925), 25 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:03,534 INFO L186 Difference]: Start difference. First operand has 154 places, 148 transitions, 689 flow. Second operand 24 states and 1275 transitions. [2021-11-23 12:24:03,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 206 transitions, 1257 flow [2021-11-23 12:24:03,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 206 transitions, 1221 flow, removed 11 selfloop flow, removed 9 redundant places. [2021-11-23 12:24:03,547 INFO L242 Difference]: Finished difference. Result has 169 places, 161 transitions, 866 flow [2021-11-23 12:24:03,548 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=866, PETRI_PLACES=169, PETRI_TRANSITIONS=161} [2021-11-23 12:24:03,549 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 65 predicate places. [2021-11-23 12:24:03,549 INFO L470 AbstractCegarLoop]: Abstraction has has 169 places, 161 transitions, 866 flow [2021-11-23 12:24:03,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 52.0) internal successors, (1560), 30 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:03,551 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 12:24:03,551 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:24:03,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-23 12:24:03,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 12:24:03,778 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 12:24:03,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:24:03,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1290739464, now seen corresponding path program 5 times [2021-11-23 12:24:03,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:24:03,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384915340] [2021-11-23 12:24:03,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:24:03,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:24:03,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:24:04,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:24:04,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:24:04,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384915340] [2021-11-23 12:24:04,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384915340] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:24:04,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180864768] [2021-11-23 12:24:04,070 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 12:24:04,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:24:04,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:24:04,077 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:24:04,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 12:24:04,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:24:04,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:24:04,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-23 12:24:04,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:24:04,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 12:24:04,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 12:24:04,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 12:24:05,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:24:05,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:24:05,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:24:05,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180864768] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:24:05,319 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:24:05,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 8] total 27 [2021-11-23 12:24:05,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901116378] [2021-11-23 12:24:05,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:24:05,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-23 12:24:05,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:24:05,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-23 12:24:05,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-11-23 12:24:05,323 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2021-11-23 12:24:05,325 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 161 transitions, 866 flow. Second operand has 27 states, 27 states have (on average 52.22222222222222) internal successors, (1410), 27 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:05,325 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 12:24:05,326 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2021-11-23 12:24:05,326 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 12:24:06,531 INFO L129 PetriNetUnfolder]: 831/1856 cut-off events. [2021-11-23 12:24:06,531 INFO L130 PetriNetUnfolder]: For 3579/3579 co-relation queries the response was YES. [2021-11-23 12:24:06,541 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5604 conditions, 1856 events. 831/1856 cut-off events. For 3579/3579 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 12815 event pairs, 241 based on Foata normal form. 1/1843 useless extension candidates. Maximal degree in co-relation 5580. Up to 832 conditions per place. [2021-11-23 12:24:06,555 INFO L132 encePairwiseOnDemand]: 96/117 looper letters, 120 selfloop transitions, 61 changer transitions 4/227 dead transitions. [2021-11-23 12:24:06,555 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 227 transitions, 1549 flow [2021-11-23 12:24:06,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-23 12:24:06,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-11-23 12:24:06,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1380 transitions. [2021-11-23 12:24:06,563 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4536489151873767 [2021-11-23 12:24:06,564 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1380 transitions. [2021-11-23 12:24:06,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1380 transitions. [2021-11-23 12:24:06,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 12:24:06,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1380 transitions. [2021-11-23 12:24:06,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 53.07692307692308) internal successors, (1380), 26 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:06,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 117.0) internal successors, (3159), 27 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:06,582 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 117.0) internal successors, (3159), 27 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:06,582 INFO L186 Difference]: Start difference. First operand has 169 places, 161 transitions, 866 flow. Second operand 26 states and 1380 transitions. [2021-11-23 12:24:06,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 227 transitions, 1549 flow [2021-11-23 12:24:06,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 227 transitions, 1411 flow, removed 45 selfloop flow, removed 17 redundant places. [2021-11-23 12:24:06,600 INFO L242 Difference]: Finished difference. Result has 178 places, 177 transitions, 1035 flow [2021-11-23 12:24:06,601 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=766, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1035, PETRI_PLACES=178, PETRI_TRANSITIONS=177} [2021-11-23 12:24:06,602 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 74 predicate places. [2021-11-23 12:24:06,602 INFO L470 AbstractCegarLoop]: Abstraction has has 178 places, 177 transitions, 1035 flow [2021-11-23 12:24:06,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 52.22222222222222) internal successors, (1410), 27 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:06,603 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 12:24:06,603 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:24:06,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 12:24:06,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:24:06,818 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 12:24:06,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:24:06,818 INFO L85 PathProgramCache]: Analyzing trace with hash -836879962, now seen corresponding path program 6 times [2021-11-23 12:24:06,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:24:06,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487462930] [2021-11-23 12:24:06,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:24:06,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:24:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:24:06,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:24:06,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:24:06,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487462930] [2021-11-23 12:24:06,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487462930] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:24:06,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011903729] [2021-11-23 12:24:06,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 12:24:06,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:24:06,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:24:06,932 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:24:06,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 12:24:07,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-23 12:24:07,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:24:07,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 12:24:07,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:24:07,354 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:24:07,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:24:07,706 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:24:07,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011903729] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:24:07,706 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:24:07,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2021-11-23 12:24:07,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312666378] [2021-11-23 12:24:07,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:24:07,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 12:24:07,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:24:07,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 12:24:07,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-11-23 12:24:07,711 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 117 [2021-11-23 12:24:07,713 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 177 transitions, 1035 flow. Second operand has 24 states, 24 states have (on average 83.75) internal successors, (2010), 24 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:07,713 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 12:24:07,714 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 117 [2021-11-23 12:24:07,714 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 12:24:08,281 INFO L129 PetriNetUnfolder]: 416/1405 cut-off events. [2021-11-23 12:24:08,281 INFO L130 PetriNetUnfolder]: For 2415/2432 co-relation queries the response was YES. [2021-11-23 12:24:08,288 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4122 conditions, 1405 events. 416/1405 cut-off events. For 2415/2432 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 10089 event pairs, 114 based on Foata normal form. 41/1431 useless extension candidates. Maximal degree in co-relation 4096. Up to 385 conditions per place. [2021-11-23 12:24:08,297 INFO L132 encePairwiseOnDemand]: 101/117 looper letters, 174 selfloop transitions, 33 changer transitions 0/292 dead transitions. [2021-11-23 12:24:08,298 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 292 transitions, 2259 flow [2021-11-23 12:24:08,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 12:24:08,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-23 12:24:08,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1370 transitions. [2021-11-23 12:24:08,301 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7318376068376068 [2021-11-23 12:24:08,301 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1370 transitions. [2021-11-23 12:24:08,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1370 transitions. [2021-11-23 12:24:08,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 12:24:08,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1370 transitions. [2021-11-23 12:24:08,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 85.625) internal successors, (1370), 16 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:08,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 117.0) internal successors, (1989), 17 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:08,309 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 117.0) internal successors, (1989), 17 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:08,309 INFO L186 Difference]: Start difference. First operand has 178 places, 177 transitions, 1035 flow. Second operand 16 states and 1370 transitions. [2021-11-23 12:24:08,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 292 transitions, 2259 flow [2021-11-23 12:24:08,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 292 transitions, 2081 flow, removed 53 selfloop flow, removed 18 redundant places. [2021-11-23 12:24:08,365 INFO L242 Difference]: Finished difference. Result has 182 places, 203 transitions, 1297 flow [2021-11-23 12:24:08,365 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=929, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1297, PETRI_PLACES=182, PETRI_TRANSITIONS=203} [2021-11-23 12:24:08,366 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 78 predicate places. [2021-11-23 12:24:08,366 INFO L470 AbstractCegarLoop]: Abstraction has has 182 places, 203 transitions, 1297 flow [2021-11-23 12:24:08,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 83.75) internal successors, (2010), 24 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:08,367 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 12:24:08,367 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:24:08,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 12:24:08,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:24:08,594 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 12:24:08,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:24:08,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1430433830, now seen corresponding path program 7 times [2021-11-23 12:24:08,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:24:08,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77196541] [2021-11-23 12:24:08,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:24:08,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:24:08,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:24:08,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:24:08,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:24:08,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77196541] [2021-11-23 12:24:08,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77196541] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:24:08,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718014169] [2021-11-23 12:24:08,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 12:24:08,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:24:08,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:24:08,738 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:24:08,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 12:24:08,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:24:08,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 12:24:08,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:24:09,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:24:09,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:24:09,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:24:09,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718014169] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:24:09,530 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:24:09,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2021-11-23 12:24:09,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174697027] [2021-11-23 12:24:09,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:24:09,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 12:24:09,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:24:09,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 12:24:09,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-11-23 12:24:09,534 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 117 [2021-11-23 12:24:09,544 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 203 transitions, 1297 flow. Second operand has 24 states, 24 states have (on average 83.75) internal successors, (2010), 24 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:09,545 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 12:24:09,545 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 117 [2021-11-23 12:24:09,545 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 12:24:10,255 INFO L129 PetriNetUnfolder]: 351/1199 cut-off events. [2021-11-23 12:24:10,256 INFO L130 PetriNetUnfolder]: For 2206/2244 co-relation queries the response was YES. [2021-11-23 12:24:10,262 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3698 conditions, 1199 events. 351/1199 cut-off events. For 2206/2244 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8502 event pairs, 133 based on Foata normal form. 63/1250 useless extension candidates. Maximal degree in co-relation 3666. Up to 453 conditions per place. [2021-11-23 12:24:10,270 INFO L132 encePairwiseOnDemand]: 101/117 looper letters, 101 selfloop transitions, 12 changer transitions 80/277 dead transitions. [2021-11-23 12:24:10,270 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 277 transitions, 2138 flow [2021-11-23 12:24:10,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 12:24:10,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-23 12:24:10,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1370 transitions. [2021-11-23 12:24:10,273 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7318376068376068 [2021-11-23 12:24:10,273 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1370 transitions. [2021-11-23 12:24:10,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1370 transitions. [2021-11-23 12:24:10,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 12:24:10,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1370 transitions. [2021-11-23 12:24:10,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 85.625) internal successors, (1370), 16 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:10,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 117.0) internal successors, (1989), 17 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:10,282 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 117.0) internal successors, (1989), 17 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:10,282 INFO L186 Difference]: Start difference. First operand has 182 places, 203 transitions, 1297 flow. Second operand 16 states and 1370 transitions. [2021-11-23 12:24:10,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 277 transitions, 2138 flow [2021-11-23 12:24:10,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 277 transitions, 2119 flow, removed 5 selfloop flow, removed 4 redundant places. [2021-11-23 12:24:10,302 INFO L242 Difference]: Finished difference. Result has 198 places, 181 transitions, 1074 flow [2021-11-23 12:24:10,303 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=1252, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1074, PETRI_PLACES=198, PETRI_TRANSITIONS=181} [2021-11-23 12:24:10,304 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 94 predicate places. [2021-11-23 12:24:10,304 INFO L470 AbstractCegarLoop]: Abstraction has has 198 places, 181 transitions, 1074 flow [2021-11-23 12:24:10,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 83.75) internal successors, (2010), 24 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:10,305 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 12:24:10,306 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:24:10,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 12:24:10,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:24:10,533 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 12:24:10,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:24:10,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1550571361, now seen corresponding path program 8 times [2021-11-23 12:24:10,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:24:10,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297202109] [2021-11-23 12:24:10,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:24:10,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:24:10,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:24:10,673 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 12:24:10,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:24:10,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297202109] [2021-11-23 12:24:10,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297202109] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:24:10,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639582760] [2021-11-23 12:24:10,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:24:10,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:24:10,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:24:10,675 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:24:10,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 12:24:10,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:24:10,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:24:10,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 12:24:10,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:24:11,022 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 12:24:11,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:24:11,225 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 12:24:11,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639582760] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:24:11,226 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:24:11,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 19 [2021-11-23 12:24:11,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617158405] [2021-11-23 12:24:11,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:24:11,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 12:24:11,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:24:11,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 12:24:11,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-11-23 12:24:11,229 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 117 [2021-11-23 12:24:11,231 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 181 transitions, 1074 flow. Second operand has 19 states, 19 states have (on average 80.78947368421052) internal successors, (1535), 19 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:11,231 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 12:24:11,231 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 117 [2021-11-23 12:24:11,232 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 12:24:12,844 INFO L129 PetriNetUnfolder]: 427/1003 cut-off events. [2021-11-23 12:24:12,845 INFO L130 PetriNetUnfolder]: For 2520/2520 co-relation queries the response was YES. [2021-11-23 12:24:12,852 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3853 conditions, 1003 events. 427/1003 cut-off events. For 2520/2520 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 5168 event pairs, 6 based on Foata normal form. 49/1050 useless extension candidates. Maximal degree in co-relation 3816. Up to 165 conditions per place. [2021-11-23 12:24:12,861 INFO L132 encePairwiseOnDemand]: 99/117 looper letters, 173 selfloop transitions, 117 changer transitions 0/354 dead transitions. [2021-11-23 12:24:12,861 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 354 transitions, 2830 flow [2021-11-23 12:24:12,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-23 12:24:12,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-11-23 12:24:12,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3191 transitions. [2021-11-23 12:24:12,867 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6993206223975454 [2021-11-23 12:24:12,867 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3191 transitions. [2021-11-23 12:24:12,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3191 transitions. [2021-11-23 12:24:12,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 12:24:12,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3191 transitions. [2021-11-23 12:24:12,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 81.82051282051282) internal successors, (3191), 39 states have internal predecessors, (3191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:12,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 117.0) internal successors, (4680), 40 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:12,884 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 117.0) internal successors, (4680), 40 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:12,884 INFO L186 Difference]: Start difference. First operand has 198 places, 181 transitions, 1074 flow. Second operand 39 states and 3191 transitions. [2021-11-23 12:24:12,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 354 transitions, 2830 flow [2021-11-23 12:24:12,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 354 transitions, 2517 flow, removed 127 selfloop flow, removed 21 redundant places. [2021-11-23 12:24:12,912 INFO L242 Difference]: Finished difference. Result has 226 places, 251 transitions, 1819 flow [2021-11-23 12:24:12,913 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1819, PETRI_PLACES=226, PETRI_TRANSITIONS=251} [2021-11-23 12:24:12,914 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 122 predicate places. [2021-11-23 12:24:12,914 INFO L470 AbstractCegarLoop]: Abstraction has has 226 places, 251 transitions, 1819 flow [2021-11-23 12:24:12,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 80.78947368421052) internal successors, (1535), 19 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:12,915 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 12:24:12,915 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:24:12,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 12:24:13,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:24:13,133 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 12:24:13,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:24:13,133 INFO L85 PathProgramCache]: Analyzing trace with hash -170219437, now seen corresponding path program 9 times [2021-11-23 12:24:13,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:24:13,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228133516] [2021-11-23 12:24:13,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:24:13,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:24:13,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:24:13,256 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 12:24:13,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:24:13,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228133516] [2021-11-23 12:24:13,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228133516] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:24:13,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695608528] [2021-11-23 12:24:13,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:24:13,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:24:13,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:24:13,259 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:24:13,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 12:24:13,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 12:24:13,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:24:13,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 12:24:13,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:24:13,836 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 12:24:13,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:24:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 12:24:14,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695608528] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:24:14,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:24:14,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2021-11-23 12:24:14,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024019439] [2021-11-23 12:24:14,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:24:14,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 12:24:14,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:24:14,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 12:24:14,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-11-23 12:24:14,324 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 117 [2021-11-23 12:24:14,326 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 251 transitions, 1819 flow. Second operand has 24 states, 24 states have (on average 83.95833333333333) internal successors, (2015), 24 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:14,326 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 12:24:14,326 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 117 [2021-11-23 12:24:14,326 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 12:24:14,973 INFO L129 PetriNetUnfolder]: 308/813 cut-off events. [2021-11-23 12:24:14,973 INFO L130 PetriNetUnfolder]: For 4485/4511 co-relation queries the response was YES. [2021-11-23 12:24:14,981 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3714 conditions, 813 events. 308/813 cut-off events. For 4485/4511 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3802 event pairs, 39 based on Foata normal form. 32/832 useless extension candidates. Maximal degree in co-relation 3669. Up to 169 conditions per place. [2021-11-23 12:24:14,990 INFO L132 encePairwiseOnDemand]: 104/117 looper letters, 137 selfloop transitions, 57 changer transitions 0/312 dead transitions. [2021-11-23 12:24:14,990 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 312 transitions, 2661 flow [2021-11-23 12:24:14,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 12:24:14,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-11-23 12:24:14,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1280 transitions. [2021-11-23 12:24:14,993 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7293447293447294 [2021-11-23 12:24:14,993 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1280 transitions. [2021-11-23 12:24:14,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1280 transitions. [2021-11-23 12:24:14,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 12:24:14,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1280 transitions. [2021-11-23 12:24:14,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 85.33333333333333) internal successors, (1280), 15 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:15,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 117.0) internal successors, (1872), 16 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:15,000 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 117.0) internal successors, (1872), 16 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:15,001 INFO L186 Difference]: Start difference. First operand has 226 places, 251 transitions, 1819 flow. Second operand 15 states and 1280 transitions. [2021-11-23 12:24:15,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 312 transitions, 2661 flow [2021-11-23 12:24:15,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 312 transitions, 2622 flow, removed 8 selfloop flow, removed 10 redundant places. [2021-11-23 12:24:15,043 INFO L242 Difference]: Finished difference. Result has 233 places, 259 transitions, 2014 flow [2021-11-23 12:24:15,043 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=1780, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2014, PETRI_PLACES=233, PETRI_TRANSITIONS=259} [2021-11-23 12:24:15,044 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 129 predicate places. [2021-11-23 12:24:15,044 INFO L470 AbstractCegarLoop]: Abstraction has has 233 places, 259 transitions, 2014 flow [2021-11-23 12:24:15,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 83.95833333333333) internal successors, (2015), 24 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:15,046 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 12:24:15,047 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:24:15,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-23 12:24:15,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-23 12:24:15,261 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 12:24:15,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:24:15,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1147488349, now seen corresponding path program 10 times [2021-11-23 12:24:15,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:24:15,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963356687] [2021-11-23 12:24:15,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:24:15,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:24:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:24:16,501 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:24:16,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:24:16,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963356687] [2021-11-23 12:24:16,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963356687] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:24:16,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320375541] [2021-11-23 12:24:16,502 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 12:24:16,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:24:16,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:24:16,506 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:24:16,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 12:24:16,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 12:24:16,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:24:16,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 93 conjunts are in the unsatisfiable core [2021-11-23 12:24:16,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:24:17,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 12:24:17,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 12:24:18,009 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 12:24:18,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-11-23 12:24:18,503 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:24:18,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:24:44,794 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_#t~pre11#1| Int) (|ULTIMATE.start_main_~#t2~0#1.offset| Int)) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base|) |ULTIMATE.start_main_~#t2~0#1.offset| |ULTIMATE.start_main_#t~pre11#1|)) c_~A~0.base))) (= (+ (select .cse0 c_~A~0.offset) (select .cse0 (+ c_~A~0.offset 4))) (let ((.cse1 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (+ c_~counter~0 (select .cse0 (+ .cse1 c_~A~0.offset 4)) (select (select |c_#memory_int| c_~A~0.base) (+ .cse1 c_~A~0.offset))))))) is different from false [2021-11-23 12:24:45,707 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_#t~pre11#1| Int) (|ULTIMATE.start_main_~#t2~0#1.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base|) |ULTIMATE.start_main_~#t2~0#1.offset| |ULTIMATE.start_main_#t~pre11#1|)) c_~A~0.base) c_~A~0.offset) (+ c_~counter~0 (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset)))) is different from false [2021-11-23 12:24:47,667 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_#t~pre9#1| Int) (|ULTIMATE.start_main_~#t1~0#1.offset| Int) (|ULTIMATE.start_main_#t~pre11#1| Int) (|ULTIMATE.start_main_~#t2~0#1.offset| Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base|) |ULTIMATE.start_main_~#t1~0#1.offset| |ULTIMATE.start_main_#t~pre9#1|)))) (= (+ c_~counter~0 (select (select .cse0 c_~A~0.base) c_~A~0.offset)) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base|) |ULTIMATE.start_main_~#t2~0#1.offset| |ULTIMATE.start_main_#t~pre11#1|)) c_~A~0.base) c_~A~0.offset)))) is different from false [2021-11-23 12:24:48,887 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_#t~pre9#1| Int) (|ULTIMATE.start_main_~#t1~0#1.offset| Int) (|ULTIMATE.start_main_#t~pre11#1| Int) (|ULTIMATE.start_main_~#t2~0#1.offset| Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base|) |ULTIMATE.start_main_~#t1~0#1.offset| |ULTIMATE.start_main_#t~pre9#1|)))) (= (+ c_~counter~0 (select (select .cse0 |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|)) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base|) |ULTIMATE.start_main_~#t2~0#1.offset| |ULTIMATE.start_main_#t~pre11#1|)) |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|)))) is different from false [2021-11-23 12:25:23,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1550 treesize of output 1454 [2021-11-23 12:33:21,435 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 11 refuted. 6 times theorem prover too weak. 3 trivial. 3 not checked. [2021-11-23 12:33:21,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320375541] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:33:21,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:33:21,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 26, 23] total 69 [2021-11-23 12:33:21,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439098552] [2021-11-23 12:33:21,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:33:21,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-23 12:33:21,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:33:21,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-23 12:33:21,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=3894, Unknown=38, NotChecked=516, Total=4692 [2021-11-23 12:33:21,444 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 117 [2021-11-23 12:33:21,448 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 259 transitions, 2014 flow. Second operand has 69 states, 69 states have (on average 40.82608695652174) internal successors, (2817), 69 states have internal predecessors, (2817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:21,448 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 12:33:21,448 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 117 [2021-11-23 12:33:21,448 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 12:33:35,264 INFO L129 PetriNetUnfolder]: 2286/4152 cut-off events. [2021-11-23 12:33:35,264 INFO L130 PetriNetUnfolder]: For 20517/20517 co-relation queries the response was YES. [2021-11-23 12:33:35,288 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18843 conditions, 4152 events. 2286/4152 cut-off events. For 20517/20517 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 27263 event pairs, 189 based on Foata normal form. 1/4136 useless extension candidates. Maximal degree in co-relation 18799. Up to 2292 conditions per place. [2021-11-23 12:33:35,320 INFO L132 encePairwiseOnDemand]: 81/117 looper letters, 480 selfloop transitions, 200 changer transitions 4/716 dead transitions. [2021-11-23 12:33:35,320 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 716 transitions, 6626 flow [2021-11-23 12:33:35,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-23 12:33:35,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-11-23 12:33:35,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 2960 transitions. [2021-11-23 12:33:35,328 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3775991835693328 [2021-11-23 12:33:35,328 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 2960 transitions. [2021-11-23 12:33:35,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 2960 transitions. [2021-11-23 12:33:35,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 12:33:35,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 2960 transitions. [2021-11-23 12:33:35,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 44.17910447761194) internal successors, (2960), 67 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:35,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 117.0) internal successors, (7956), 68 states have internal predecessors, (7956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:35,354 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 117.0) internal successors, (7956), 68 states have internal predecessors, (7956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:35,354 INFO L186 Difference]: Start difference. First operand has 233 places, 259 transitions, 2014 flow. Second operand 67 states and 2960 transitions. [2021-11-23 12:33:35,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 716 transitions, 6626 flow [2021-11-23 12:33:35,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 716 transitions, 6454 flow, removed 20 selfloop flow, removed 12 redundant places. [2021-11-23 12:33:35,547 INFO L242 Difference]: Finished difference. Result has 309 places, 444 transitions, 4091 flow [2021-11-23 12:33:35,548 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=1940, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=4091, PETRI_PLACES=309, PETRI_TRANSITIONS=444} [2021-11-23 12:33:35,549 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 205 predicate places. [2021-11-23 12:33:35,549 INFO L470 AbstractCegarLoop]: Abstraction has has 309 places, 444 transitions, 4091 flow [2021-11-23 12:33:35,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 40.82608695652174) internal successors, (2817), 69 states have internal predecessors, (2817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:35,550 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 12:33:35,551 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:33:35,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 12:33:35,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 12:33:35,778 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 12:33:35,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:33:35,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1705508623, now seen corresponding path program 11 times [2021-11-23 12:33:35,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:33:35,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279432711] [2021-11-23 12:33:35,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:33:35,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:33:35,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:33:36,692 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:33:36,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:33:36,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279432711] [2021-11-23 12:33:36,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279432711] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:33:36,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877485095] [2021-11-23 12:33:36,693 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 12:33:36,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:33:36,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:33:36,694 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:33:36,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 12:33:36,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-23 12:33:36,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:33:36,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-23 12:33:36,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:33:37,865 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 12:33:37,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:33:38,280 INFO L354 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2021-11-23 12:33:38,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 51 [2021-11-23 12:33:38,779 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 12:33:38,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877485095] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:33:38,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:33:38,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 19, 15] total 47 [2021-11-23 12:33:38,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990142419] [2021-11-23 12:33:38,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:33:38,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-23 12:33:38,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:33:38,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-23 12:33:38,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1999, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 12:33:38,785 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2021-11-23 12:33:38,789 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 444 transitions, 4091 flow. Second operand has 47 states, 47 states have (on average 51.297872340425535) internal successors, (2411), 47 states have internal predecessors, (2411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:38,789 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 12:33:38,789 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2021-11-23 12:33:38,789 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 12:33:43,729 INFO L129 PetriNetUnfolder]: 3148/5713 cut-off events. [2021-11-23 12:33:43,729 INFO L130 PetriNetUnfolder]: For 38603/38686 co-relation queries the response was YES. [2021-11-23 12:33:43,777 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31113 conditions, 5713 events. 3148/5713 cut-off events. For 38603/38686 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 40367 event pairs, 573 based on Foata normal form. 22/5694 useless extension candidates. Maximal degree in co-relation 31050. Up to 3489 conditions per place. [2021-11-23 12:33:43,913 INFO L132 encePairwiseOnDemand]: 88/117 looper letters, 472 selfloop transitions, 244 changer transitions 4/758 dead transitions. [2021-11-23 12:33:43,913 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 758 transitions, 8396 flow [2021-11-23 12:33:43,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-23 12:33:43,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-11-23 12:33:43,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 2942 transitions. [2021-11-23 12:33:43,925 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.45718725718725717 [2021-11-23 12:33:43,926 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 2942 transitions. [2021-11-23 12:33:43,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 2942 transitions. [2021-11-23 12:33:43,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 12:33:43,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 2942 transitions. [2021-11-23 12:33:43,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 53.49090909090909) internal successors, (2942), 55 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:43,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 117.0) internal successors, (6552), 56 states have internal predecessors, (6552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:43,948 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 117.0) internal successors, (6552), 56 states have internal predecessors, (6552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:43,948 INFO L186 Difference]: Start difference. First operand has 309 places, 444 transitions, 4091 flow. Second operand 55 states and 2942 transitions. [2021-11-23 12:33:43,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 758 transitions, 8396 flow [2021-11-23 12:33:44,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 758 transitions, 8226 flow, removed 71 selfloop flow, removed 14 redundant places. [2021-11-23 12:33:44,338 INFO L242 Difference]: Finished difference. Result has 362 places, 575 transitions, 6167 flow [2021-11-23 12:33:44,339 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=3971, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=6167, PETRI_PLACES=362, PETRI_TRANSITIONS=575} [2021-11-23 12:33:44,339 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 258 predicate places. [2021-11-23 12:33:44,340 INFO L470 AbstractCegarLoop]: Abstraction has has 362 places, 575 transitions, 6167 flow [2021-11-23 12:33:44,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 51.297872340425535) internal successors, (2411), 47 states have internal predecessors, (2411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:44,341 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 12:33:44,341 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:33:44,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 12:33:44,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-23 12:33:44,570 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 12:33:44,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:33:44,570 INFO L85 PathProgramCache]: Analyzing trace with hash -830023367, now seen corresponding path program 12 times [2021-11-23 12:33:44,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:33:44,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229903145] [2021-11-23 12:33:44,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:33:44,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:33:44,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:33:46,005 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:33:46,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:33:46,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229903145] [2021-11-23 12:33:46,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229903145] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:33:46,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81779642] [2021-11-23 12:33:46,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 12:33:46,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:33:46,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:33:46,008 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:33:46,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 12:33:46,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-23 12:33:46,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:33:46,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 93 conjunts are in the unsatisfiable core [2021-11-23 12:33:46,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:33:46,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 12:33:47,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 12:33:47,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 12:33:47,639 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:33:47,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:33:48,412 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 12:33:48,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81779642] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:33:48,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:33:48,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 25, 14] total 60 [2021-11-23 12:33:48,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041543324] [2021-11-23 12:33:48,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:33:48,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-23 12:33:48,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:33:48,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-23 12:33:48,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=3334, Unknown=0, NotChecked=0, Total=3540 [2021-11-23 12:33:48,419 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 117 [2021-11-23 12:33:48,427 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 575 transitions, 6167 flow. Second operand has 60 states, 60 states have (on average 41.06666666666667) internal successors, (2464), 60 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:48,427 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 12:33:48,428 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 117 [2021-11-23 12:33:48,428 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 12:33:56,592 INFO L129 PetriNetUnfolder]: 3586/6509 cut-off events. [2021-11-23 12:33:56,592 INFO L130 PetriNetUnfolder]: For 51207/51290 co-relation queries the response was YES. [2021-11-23 12:33:56,656 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37400 conditions, 6509 events. 3586/6509 cut-off events. For 51207/51290 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 47212 event pairs, 687 based on Foata normal form. 22/6485 useless extension candidates. Maximal degree in co-relation 37323. Up to 4119 conditions per place. [2021-11-23 12:33:56,710 INFO L132 encePairwiseOnDemand]: 86/117 looper letters, 540 selfloop transitions, 282 changer transitions 4/858 dead transitions. [2021-11-23 12:33:56,710 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 858 transitions, 10432 flow [2021-11-23 12:33:56,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-23 12:33:56,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-11-23 12:33:56,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 2943 transitions. [2021-11-23 12:33:56,817 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.36990950226244346 [2021-11-23 12:33:56,817 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 2943 transitions. [2021-11-23 12:33:56,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 2943 transitions. [2021-11-23 12:33:56,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 12:33:56,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 2943 transitions. [2021-11-23 12:33:56,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 43.279411764705884) internal successors, (2943), 68 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:56,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 117.0) internal successors, (8073), 69 states have internal predecessors, (8073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:56,851 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 117.0) internal successors, (8073), 69 states have internal predecessors, (8073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:56,851 INFO L186 Difference]: Start difference. First operand has 362 places, 575 transitions, 6167 flow. Second operand 68 states and 2943 transitions. [2021-11-23 12:33:56,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 858 transitions, 10432 flow [2021-11-23 12:33:57,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 858 transitions, 10213 flow, removed 88 selfloop flow, removed 22 redundant places. [2021-11-23 12:33:57,378 INFO L242 Difference]: Finished difference. Result has 417 places, 639 transitions, 7442 flow [2021-11-23 12:33:57,379 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=5958, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=7442, PETRI_PLACES=417, PETRI_TRANSITIONS=639} [2021-11-23 12:33:57,380 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 313 predicate places. [2021-11-23 12:33:57,380 INFO L470 AbstractCegarLoop]: Abstraction has has 417 places, 639 transitions, 7442 flow [2021-11-23 12:33:57,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 41.06666666666667) internal successors, (2464), 60 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:57,381 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 12:33:57,382 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:33:57,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 12:33:57,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 12:33:57,598 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 12:33:57,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:33:57,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1242066793, now seen corresponding path program 13 times [2021-11-23 12:33:57,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:33:57,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945385377] [2021-11-23 12:33:57,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:33:57,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:33:57,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:33:58,810 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:33:58,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:33:58,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945385377] [2021-11-23 12:33:58,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945385377] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:33:58,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248691697] [2021-11-23 12:33:58,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 12:33:58,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:33:58,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:33:58,817 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:33:58,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 12:33:58,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:33:58,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-23 12:33:58,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:33:59,821 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-23 12:33:59,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 28 [2021-11-23 12:33:59,886 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 12:33:59,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:34:00,358 INFO L354 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2021-11-23 12:34:00,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 51 [2021-11-23 12:34:00,675 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 12:34:00,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248691697] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:34:00,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:34:00,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 19, 14] total 46 [2021-11-23 12:34:00,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865728071] [2021-11-23 12:34:00,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:34:00,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-23 12:34:00,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:34:00,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-23 12:34:00,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1908, Unknown=0, NotChecked=0, Total=2070 [2021-11-23 12:34:00,680 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2021-11-23 12:34:00,682 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 639 transitions, 7442 flow. Second operand has 46 states, 46 states have (on average 51.26086956521739) internal successors, (2358), 46 states have internal predecessors, (2358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:00,682 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 12:34:00,683 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2021-11-23 12:34:00,683 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 12:34:07,170 INFO L129 PetriNetUnfolder]: 4050/7371 cut-off events. [2021-11-23 12:34:07,170 INFO L130 PetriNetUnfolder]: For 67778/67861 co-relation queries the response was YES. [2021-11-23 12:34:07,242 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44072 conditions, 7371 events. 4050/7371 cut-off events. For 67778/67861 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 54933 event pairs, 799 based on Foata normal form. 26/7351 useless extension candidates. Maximal degree in co-relation 43984. Up to 4536 conditions per place. [2021-11-23 12:34:07,297 INFO L132 encePairwiseOnDemand]: 87/117 looper letters, 556 selfloop transitions, 309 changer transitions 8/911 dead transitions. [2021-11-23 12:34:07,297 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 911 transitions, 11841 flow [2021-11-23 12:34:07,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-23 12:34:07,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-11-23 12:34:07,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3462 transitions. [2021-11-23 12:34:07,305 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4552268244575937 [2021-11-23 12:34:07,305 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3462 transitions. [2021-11-23 12:34:07,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3462 transitions. [2021-11-23 12:34:07,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 12:34:07,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3462 transitions. [2021-11-23 12:34:07,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 53.261538461538464) internal successors, (3462), 65 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:07,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 117.0) internal successors, (7722), 66 states have internal predecessors, (7722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:07,328 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 117.0) internal successors, (7722), 66 states have internal predecessors, (7722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:07,328 INFO L186 Difference]: Start difference. First operand has 417 places, 639 transitions, 7442 flow. Second operand 65 states and 3462 transitions. [2021-11-23 12:34:07,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 911 transitions, 11841 flow [2021-11-23 12:34:07,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 911 transitions, 11194 flow, removed 152 selfloop flow, removed 46 redundant places. [2021-11-23 12:34:07,978 INFO L242 Difference]: Finished difference. Result has 442 places, 688 transitions, 8274 flow [2021-11-23 12:34:07,979 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=6847, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=8274, PETRI_PLACES=442, PETRI_TRANSITIONS=688} [2021-11-23 12:34:07,979 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 338 predicate places. [2021-11-23 12:34:07,979 INFO L470 AbstractCegarLoop]: Abstraction has has 442 places, 688 transitions, 8274 flow [2021-11-23 12:34:07,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 51.26086956521739) internal successors, (2358), 46 states have internal predecessors, (2358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:07,980 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 12:34:07,980 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:08,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 12:34:08,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:08,181 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 12:34:08,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:34:08,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1238531119, now seen corresponding path program 14 times [2021-11-23 12:34:08,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:34:08,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070110933] [2021-11-23 12:34:08,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:08,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:34:08,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:09,310 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:09,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:34:09,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070110933] [2021-11-23 12:34:09,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070110933] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:34:09,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260003466] [2021-11-23 12:34:09,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:34:09,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:09,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:34:09,312 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:34:09,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 12:34:09,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:34:09,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:34:09,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-23 12:34:09,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:34:10,401 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-11-23 12:34:10,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 22 [2021-11-23 12:34:10,461 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 12:34:10,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:34:10,925 INFO L354 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2021-11-23 12:34:10,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 51 [2021-11-23 12:34:11,207 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 12:34:11,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260003466] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:34:11,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:34:11,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 19, 14] total 48 [2021-11-23 12:34:11,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436739686] [2021-11-23 12:34:11,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:34:11,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-23 12:34:11,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:34:11,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-23 12:34:11,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2090, Unknown=0, NotChecked=0, Total=2256 [2021-11-23 12:34:11,212 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2021-11-23 12:34:11,214 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 688 transitions, 8274 flow. Second operand has 48 states, 48 states have (on average 51.1875) internal successors, (2457), 48 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:11,214 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 12:34:11,214 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2021-11-23 12:34:11,214 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 12:34:17,440 INFO L129 PetriNetUnfolder]: 4368/8003 cut-off events. [2021-11-23 12:34:17,440 INFO L130 PetriNetUnfolder]: For 80235/80320 co-relation queries the response was YES. [2021-11-23 12:34:17,559 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48639 conditions, 8003 events. 4368/8003 cut-off events. For 80235/80320 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 60841 event pairs, 998 based on Foata normal form. 23/7973 useless extension candidates. Maximal degree in co-relation 48543. Up to 5220 conditions per place. [2021-11-23 12:34:17,604 INFO L132 encePairwiseOnDemand]: 88/117 looper letters, 580 selfloop transitions, 296 changer transitions 8/922 dead transitions. [2021-11-23 12:34:17,604 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 922 transitions, 12244 flow [2021-11-23 12:34:17,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-23 12:34:17,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-11-23 12:34:17,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3258 transitions. [2021-11-23 12:34:17,611 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.45649432534678436 [2021-11-23 12:34:17,612 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3258 transitions. [2021-11-23 12:34:17,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3258 transitions. [2021-11-23 12:34:17,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 12:34:17,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3258 transitions. [2021-11-23 12:34:17,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 53.40983606557377) internal successors, (3258), 61 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:17,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 117.0) internal successors, (7254), 62 states have internal predecessors, (7254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:17,633 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 117.0) internal successors, (7254), 62 states have internal predecessors, (7254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:17,634 INFO L186 Difference]: Start difference. First operand has 442 places, 688 transitions, 8274 flow. Second operand 61 states and 3258 transitions. [2021-11-23 12:34:17,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 922 transitions, 12244 flow [2021-11-23 12:34:18,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 922 transitions, 11879 flow, removed 92 selfloop flow, removed 38 redundant places. [2021-11-23 12:34:18,491 INFO L242 Difference]: Finished difference. Result has 470 places, 717 transitions, 9158 flow [2021-11-23 12:34:18,492 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=7925, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=9158, PETRI_PLACES=470, PETRI_TRANSITIONS=717} [2021-11-23 12:34:18,493 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 366 predicate places. [2021-11-23 12:34:18,493 INFO L470 AbstractCegarLoop]: Abstraction has has 470 places, 717 transitions, 9158 flow [2021-11-23 12:34:18,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 51.1875) internal successors, (2457), 48 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:18,494 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 12:34:18,495 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:18,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 12:34:18,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:18,706 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 12:34:18,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:34:18,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1132419989, now seen corresponding path program 15 times [2021-11-23 12:34:18,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:34:18,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031561260] [2021-11-23 12:34:18,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:18,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:34:18,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:19,728 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:19,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:34:19,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031561260] [2021-11-23 12:34:19,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031561260] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:34:19,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814457072] [2021-11-23 12:34:19,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:34:19,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:19,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:34:19,730 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:34:19,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 12:34:19,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 12:34:19,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:34:19,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-23 12:34:19,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:34:21,734 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:34:21,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-11-23 12:34:22,058 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:22,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:34:22,516 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 12:34:23,018 INFO L354 Elim1Store]: treesize reduction 29, result has 67.0 percent of original size [2021-11-23 12:34:23,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 75 [2021-11-23 12:34:24,643 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:24,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814457072] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:34:24,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:34:24,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 25] total 74 [2021-11-23 12:34:24,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3902116] [2021-11-23 12:34:24,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:34:24,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-11-23 12:34:24,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:34:24,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-11-23 12:34:24,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=4951, Unknown=0, NotChecked=0, Total=5402 [2021-11-23 12:34:24,651 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2021-11-23 12:34:24,655 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 717 transitions, 9158 flow. Second operand has 74 states, 74 states have (on average 50.67567567567568) internal successors, (3750), 74 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:24,655 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 12:34:24,655 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2021-11-23 12:34:24,655 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 12:34:36,299 INFO L129 PetriNetUnfolder]: 5924/10917 cut-off events. [2021-11-23 12:34:36,299 INFO L130 PetriNetUnfolder]: For 121466/121552 co-relation queries the response was YES. [2021-11-23 12:34:36,535 INFO L84 FinitePrefix]: Finished finitePrefix Result has 67600 conditions, 10917 events. 5924/10917 cut-off events. For 121466/121552 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 88272 event pairs, 935 based on Foata normal form. 28/10884 useless extension candidates. Maximal degree in co-relation 67498. Up to 6128 conditions per place. [2021-11-23 12:34:36,734 INFO L132 encePairwiseOnDemand]: 83/117 looper letters, 771 selfloop transitions, 578 changer transitions 12/1399 dead transitions. [2021-11-23 12:34:36,734 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 1399 transitions, 20093 flow [2021-11-23 12:34:36,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-11-23 12:34:36,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-11-23 12:34:36,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 4632 transitions. [2021-11-23 12:34:36,744 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.45505452402004126 [2021-11-23 12:34:36,744 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 4632 transitions. [2021-11-23 12:34:36,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 4632 transitions. [2021-11-23 12:34:36,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 12:34:36,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 4632 transitions. [2021-11-23 12:34:36,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 53.241379310344826) internal successors, (4632), 87 states have internal predecessors, (4632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:36,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 117.0) internal successors, (10296), 88 states have internal predecessors, (10296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:36,779 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 117.0) internal successors, (10296), 88 states have internal predecessors, (10296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:36,779 INFO L186 Difference]: Start difference. First operand has 470 places, 717 transitions, 9158 flow. Second operand 87 states and 4632 transitions. [2021-11-23 12:34:36,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 1399 transitions, 20093 flow [2021-11-23 12:34:37,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 1399 transitions, 18794 flow, removed 398 selfloop flow, removed 49 redundant places. [2021-11-23 12:34:38,028 INFO L242 Difference]: Finished difference. Result has 540 places, 1070 transitions, 15472 flow [2021-11-23 12:34:38,029 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=8458, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=285, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=15472, PETRI_PLACES=540, PETRI_TRANSITIONS=1070} [2021-11-23 12:34:38,030 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 436 predicate places. [2021-11-23 12:34:38,030 INFO L470 AbstractCegarLoop]: Abstraction has has 540 places, 1070 transitions, 15472 flow [2021-11-23 12:34:38,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 50.67567567567568) internal successors, (3750), 74 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:38,031 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 12:34:38,031 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:38,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-23 12:34:38,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:38,246 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 12:34:38,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:34:38,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1005576847, now seen corresponding path program 16 times [2021-11-23 12:34:38,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:34:38,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105865088] [2021-11-23 12:34:38,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:38,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:34:38,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:39,535 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:39,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:34:39,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105865088] [2021-11-23 12:34:39,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105865088] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:34:39,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858204139] [2021-11-23 12:34:39,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 12:34:39,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:39,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:34:39,537 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:34:39,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 12:34:39,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 12:34:39,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:34:39,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 93 conjunts are in the unsatisfiable core [2021-11-23 12:34:39,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:34:40,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 12:34:40,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 12:34:40,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 12:34:41,250 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:41,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:34:41,988 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 12:34:41,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858204139] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:34:41,989 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:34:41,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 25, 14] total 58 [2021-11-23 12:34:41,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672375398] [2021-11-23 12:34:41,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:34:41,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-23 12:34:41,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:34:41,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-23 12:34:41,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=3108, Unknown=0, NotChecked=0, Total=3306 [2021-11-23 12:34:41,994 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 117 [2021-11-23 12:34:41,996 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 1070 transitions, 15472 flow. Second operand has 58 states, 58 states have (on average 44.12068965517241) internal successors, (2559), 58 states have internal predecessors, (2559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:41,996 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 12:34:41,996 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 117 [2021-11-23 12:34:41,996 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 12:34:54,885 INFO L129 PetriNetUnfolder]: 6154/11327 cut-off events. [2021-11-23 12:34:54,885 INFO L130 PetriNetUnfolder]: For 212377/212440 co-relation queries the response was YES. [2021-11-23 12:34:55,254 INFO L84 FinitePrefix]: Finished finitePrefix Result has 88462 conditions, 11327 events. 6154/11327 cut-off events. For 212377/212440 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 92343 event pairs, 1285 based on Foata normal form. 25/11276 useless extension candidates. Maximal degree in co-relation 88327. Up to 7795 conditions per place. [2021-11-23 12:34:55,364 INFO L132 encePairwiseOnDemand]: 86/117 looper letters, 869 selfloop transitions, 366 changer transitions 4/1274 dead transitions. [2021-11-23 12:34:55,364 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 1274 transitions, 20904 flow [2021-11-23 12:34:55,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-23 12:34:55,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-11-23 12:34:55,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 2774 transitions. [2021-11-23 12:34:55,373 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.39515669515669516 [2021-11-23 12:34:55,374 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 2774 transitions. [2021-11-23 12:34:55,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 2774 transitions. [2021-11-23 12:34:55,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 12:34:55,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 2774 transitions. [2021-11-23 12:34:55,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 46.233333333333334) internal successors, (2774), 60 states have internal predecessors, (2774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:55,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 117.0) internal successors, (7137), 61 states have internal predecessors, (7137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:55,397 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 117.0) internal successors, (7137), 61 states have internal predecessors, (7137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:55,398 INFO L186 Difference]: Start difference. First operand has 540 places, 1070 transitions, 15472 flow. Second operand 60 states and 2774 transitions. [2021-11-23 12:34:55,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 1274 transitions, 20904 flow [2021-11-23 12:34:57,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 1274 transitions, 19950 flow, removed 391 selfloop flow, removed 34 redundant places. [2021-11-23 12:34:57,613 INFO L242 Difference]: Finished difference. Result has 562 places, 1080 transitions, 15507 flow [2021-11-23 12:34:57,614 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=14528, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1070, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=359, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=710, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=15507, PETRI_PLACES=562, PETRI_TRANSITIONS=1080} [2021-11-23 12:34:57,615 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 458 predicate places. [2021-11-23 12:34:57,615 INFO L470 AbstractCegarLoop]: Abstraction has has 562 places, 1080 transitions, 15507 flow [2021-11-23 12:34:57,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 44.12068965517241) internal successors, (2559), 58 states have internal predecessors, (2559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:57,616 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 12:34:57,617 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:57,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-11-23 12:34:57,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-23 12:34:57,846 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 12:34:57,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:34:57,846 INFO L85 PathProgramCache]: Analyzing trace with hash -109405081, now seen corresponding path program 17 times [2021-11-23 12:34:57,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:34:57,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946057874] [2021-11-23 12:34:57,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:57,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:34:57,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:58,978 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:58,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:34:58,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946057874] [2021-11-23 12:34:58,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946057874] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:34:58,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554836642] [2021-11-23 12:34:58,979 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 12:34:58,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:58,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:34:58,984 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:34:58,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-23 12:34:59,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-23 12:34:59,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:34:59,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-23 12:34:59,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:35:00,207 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 12:35:00,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:35:00,714 INFO L354 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2021-11-23 12:35:00,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 51 [2021-11-23 12:35:01,074 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 12:35:01,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554836642] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:35:01,074 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:35:01,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 19, 14] total 46 [2021-11-23 12:35:01,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322613389] [2021-11-23 12:35:01,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:35:01,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-23 12:35:01,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:35:01,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-23 12:35:01,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1908, Unknown=0, NotChecked=0, Total=2070 [2021-11-23 12:35:01,081 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2021-11-23 12:35:01,083 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 1080 transitions, 15507 flow. Second operand has 46 states, 46 states have (on average 51.369565217391305) internal successors, (2363), 46 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:01,083 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 12:35:01,083 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2021-11-23 12:35:01,083 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 12:35:12,130 INFO L129 PetriNetUnfolder]: 6163/11346 cut-off events. [2021-11-23 12:35:12,131 INFO L130 PetriNetUnfolder]: For 207799/207862 co-relation queries the response was YES. [2021-11-23 12:35:12,467 INFO L84 FinitePrefix]: Finished finitePrefix Result has 88593 conditions, 11346 events. 6163/11346 cut-off events. For 207799/207862 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 92299 event pairs, 1278 based on Foata normal form. 27/11301 useless extension candidates. Maximal degree in co-relation 88461. Up to 7613 conditions per place. [2021-11-23 12:35:12,545 INFO L132 encePairwiseOnDemand]: 88/117 looper letters, 835 selfloop transitions, 411 changer transitions 4/1288 dead transitions. [2021-11-23 12:35:12,545 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 622 places, 1288 transitions, 20870 flow [2021-11-23 12:35:12,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-23 12:35:12,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-11-23 12:35:12,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3349 transitions. [2021-11-23 12:35:12,552 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.45434812101478766 [2021-11-23 12:35:12,552 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3349 transitions. [2021-11-23 12:35:12,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3349 transitions. [2021-11-23 12:35:12,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 12:35:12,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3349 transitions. [2021-11-23 12:35:12,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 53.15873015873016) internal successors, (3349), 63 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:12,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 117.0) internal successors, (7488), 64 states have internal predecessors, (7488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:12,571 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 117.0) internal successors, (7488), 64 states have internal predecessors, (7488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:12,571 INFO L186 Difference]: Start difference. First operand has 562 places, 1080 transitions, 15507 flow. Second operand 63 states and 3349 transitions. [2021-11-23 12:35:12,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 622 places, 1288 transitions, 20870 flow [2021-11-23 12:35:14,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 567 places, 1288 transitions, 20327 flow, removed 31 selfloop flow, removed 55 redundant places. [2021-11-23 12:35:14,394 INFO L242 Difference]: Finished difference. Result has 571 places, 1083 transitions, 15936 flow [2021-11-23 12:35:14,395 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=14970, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1080, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=409, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=670, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=15936, PETRI_PLACES=571, PETRI_TRANSITIONS=1083} [2021-11-23 12:35:14,395 INFO L334 CegarLoopForPetriNet]: 104 programPoint places, 467 predicate places. [2021-11-23 12:35:14,396 INFO L470 AbstractCegarLoop]: Abstraction has has 571 places, 1083 transitions, 15936 flow [2021-11-23 12:35:14,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 51.369565217391305) internal successors, (2363), 46 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:14,396 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 12:35:14,396 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:35:14,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-23 12:35:14,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-23 12:35:14,597 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 12:35:14,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:35:14,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1470645319, now seen corresponding path program 18 times [2021-11-23 12:35:14,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:35:14,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547233295] [2021-11-23 12:35:14,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:35:14,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:35:14,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:35:16,231 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:35:16,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:35:16,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547233295] [2021-11-23 12:35:16,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547233295] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:35:16,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81298542] [2021-11-23 12:35:16,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 12:35:16,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:35:16,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:35:16,234 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:35:16,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e80ad7e8-329d-44d6-93aa-42e03fe8a14a/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-23 12:35:16,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-23 12:35:16,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:35:16,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-23 12:35:16,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:35:16,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 12:35:16,527 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 12:35:16,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-23 12:35:17,259 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 12:35:17,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 12:35:17,708 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-11-23 12:35:17,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 22 [2021-11-23 12:35:17,775 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 12:35:17,775 INFO L328 TraceCheckSpWp]: Computing backward predicates...