./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/fib_unsafe-10.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/fib_unsafe-10.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN --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 2f8b47007227b888287b3505472907f09ca964609029c3d26e6da29b9364f075 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 10:30:01,604 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:30:01,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:30:01,630 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:30:01,634 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:30:01,637 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:30:01,642 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:30:01,645 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:30:01,647 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:30:01,653 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:30:01,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:30:01,656 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:30:01,657 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:30:01,660 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:30:01,662 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:30:01,664 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:30:01,666 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:30:01,667 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:30:01,669 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:30:01,676 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:30:01,677 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:30:01,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:30:01,680 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:30:01,682 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:30:01,692 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:30:01,692 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:30:01,692 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:30:01,694 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:30:01,695 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:30:01,696 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:30:01,697 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:30:01,697 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:30:01,700 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:30:01,701 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:30:01,702 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:30:01,702 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:30:01,703 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:30:01,703 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:30:01,704 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:30:01,705 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:30:01,706 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:30:01,707 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:30:01,741 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:30:01,745 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:30:01,746 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:30:01,746 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:30:01,747 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:30:01,747 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:30:01,748 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:30:01,748 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:30:01,749 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:30:01,749 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:30:01,750 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:30:01,750 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:30:01,750 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:30:01,751 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:30:01,751 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:30:01,751 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:30:01,751 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:30:01,751 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:30:01,752 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:30:01,752 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:30:01,752 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:30:01,752 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:30:01,752 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:30:01,753 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:30:01,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:30:01,753 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:30:01,753 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:30:01,754 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:30:01,754 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:30:01,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:30:01,754 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:30:01,754 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:30:01,755 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:30:01,755 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_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f8b47007227b888287b3505472907f09ca964609029c3d26e6da29b9364f075 [2022-11-20 10:30:02,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:30:02,106 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:30:02,110 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:30:02,111 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:30:02,111 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:30:02,113 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/pthread/fib_unsafe-10.i [2022-11-20 10:30:05,132 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:30:05,423 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:30:05,425 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/sv-benchmarks/c/pthread/fib_unsafe-10.i [2022-11-20 10:30:05,440 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN/data/f9d18a84a/e1ee8ac93290412398477b9f579ee8cb/FLAGf6d38f8af [2022-11-20 10:30:05,459 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN/data/f9d18a84a/e1ee8ac93290412398477b9f579ee8cb [2022-11-20 10:30:05,461 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:30:05,463 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:30:05,468 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:30:05,469 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:30:05,473 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:30:05,473 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:30:05" (1/1) ... [2022-11-20 10:30:05,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76974ede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:05, skipping insertion in model container [2022-11-20 10:30:05,475 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:30:05" (1/1) ... [2022-11-20 10:30:05,483 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:30:05,541 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:30:05,962 WARN L237 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_8dc6770a-367f-4cee-b21b-afad97272da6/sv-benchmarks/c/pthread/fib_unsafe-10.i[30243,30256] [2022-11-20 10:30:05,981 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:30:05,992 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:30:06,039 WARN L237 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_8dc6770a-367f-4cee-b21b-afad97272da6/sv-benchmarks/c/pthread/fib_unsafe-10.i[30243,30256] [2022-11-20 10:30:06,064 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:30:06,102 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:30:06,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:06 WrapperNode [2022-11-20 10:30:06,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:30:06,104 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:30:06,104 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:30:06,105 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:30:06,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:06" (1/1) ... [2022-11-20 10:30:06,136 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:06" (1/1) ... [2022-11-20 10:30:06,175 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-11-20 10:30:06,175 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:30:06,176 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:30:06,176 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:30:06,177 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:30:06,187 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:06" (1/1) ... [2022-11-20 10:30:06,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:06" (1/1) ... [2022-11-20 10:30:06,194 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:06" (1/1) ... [2022-11-20 10:30:06,195 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:06" (1/1) ... [2022-11-20 10:30:06,211 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:06" (1/1) ... [2022-11-20 10:30:06,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:06" (1/1) ... [2022-11-20 10:30:06,222 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:06" (1/1) ... [2022-11-20 10:30:06,225 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:06" (1/1) ... [2022-11-20 10:30:06,228 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:30:06,234 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:30:06,234 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:30:06,234 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:30:06,235 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:06" (1/1) ... [2022-11-20 10:30:06,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:30:06,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:06,270 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:30:06,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:30:06,316 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-20 10:30:06,317 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-20 10:30:06,317 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-20 10:30:06,317 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-20 10:30:06,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 10:30:06,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 10:30:06,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:30:06,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 10:30:06,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 10:30:06,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:30:06,318 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 10:30:06,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:30:06,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:30:06,322 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 10:30:06,545 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:30:06,547 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:30:06,849 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:30:06,856 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:30:06,857 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 10:30:06,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:30:06 BoogieIcfgContainer [2022-11-20 10:30:06,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:30:06,864 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:30:06,864 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:30:06,867 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:30:06,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:30:05" (1/3) ... [2022-11-20 10:30:06,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29b2cd3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:30:06, skipping insertion in model container [2022-11-20 10:30:06,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:06" (2/3) ... [2022-11-20 10:30:06,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29b2cd3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:30:06, skipping insertion in model container [2022-11-20 10:30:06,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:30:06" (3/3) ... [2022-11-20 10:30:06,875 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-10.i [2022-11-20 10:30:06,885 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 10:30:06,897 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:30:06,897 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 10:30:06,897 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 10:30:06,986 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 10:30:07,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 101 transitions, 212 flow [2022-11-20 10:30:07,145 INFO L130 PetriNetUnfolder]: 7/99 cut-off events. [2022-11-20 10:30:07,146 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 10:30:07,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 99 events. 7/99 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 70 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2022-11-20 10:30:07,155 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 101 transitions, 212 flow [2022-11-20 10:30:07,167 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 99 transitions, 204 flow [2022-11-20 10:30:07,186 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:30:07,193 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@12f6f3c8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:30:07,194 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-20 10:30:07,240 INFO L130 PetriNetUnfolder]: 6/87 cut-off events. [2022-11-20 10:30:07,240 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 10:30:07,241 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:07,241 INFO L209 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] [2022-11-20 10:30:07,242 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:30:07,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:07,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1490454520, now seen corresponding path program 1 times [2022-11-20 10:30:07,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:07,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573080294] [2022-11-20 10:30:07,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:07,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:07,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:07,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:07,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:07,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573080294] [2022-11-20 10:30:07,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573080294] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:30:07,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:30:07,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:30:07,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249114118] [2022-11-20 10:30:07,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:30:07,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 10:30:07,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:07,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 10:30:07,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:30:07,683 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 101 [2022-11-20 10:30:07,687 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 99 transitions, 204 flow. Second operand has 2 states, 2 states have (on average 95.5) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:07,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:30:07,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 101 [2022-11-20 10:30:07,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:30:07,743 INFO L130 PetriNetUnfolder]: 3/94 cut-off events. [2022-11-20 10:30:07,744 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 10:30:07,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 94 events. 3/94 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 64 event pairs, 0 based on Foata normal form. 5/95 useless extension candidates. Maximal degree in co-relation 66. Up to 3 conditions per place. [2022-11-20 10:30:07,746 INFO L137 encePairwiseOnDemand]: 97/101 looper letters, 2 selfloop transitions, 0 changer transitions 0/94 dead transitions. [2022-11-20 10:30:07,746 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 94 transitions, 198 flow [2022-11-20 10:30:07,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 10:30:07,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 10:30:07,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 194 transitions. [2022-11-20 10:30:07,763 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9603960396039604 [2022-11-20 10:30:07,764 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 194 transitions. [2022-11-20 10:30:07,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 194 transitions. [2022-11-20 10:30:07,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:30:07,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 194 transitions. [2022-11-20 10:30:07,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 97.0) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:07,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:07,784 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:07,786 INFO L175 Difference]: Start difference. First operand has 99 places, 99 transitions, 204 flow. Second operand 2 states and 194 transitions. [2022-11-20 10:30:07,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 94 transitions, 198 flow [2022-11-20 10:30:07,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 94 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-20 10:30:07,795 INFO L231 Difference]: Finished difference. Result has 97 places, 94 transitions, 192 flow [2022-11-20 10:30:07,797 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=192, PETRI_PLACES=97, PETRI_TRANSITIONS=94} [2022-11-20 10:30:07,801 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -2 predicate places. [2022-11-20 10:30:07,802 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 94 transitions, 192 flow [2022-11-20 10:30:07,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 95.5) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:07,802 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:07,803 INFO L209 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] [2022-11-20 10:30:07,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:30:07,805 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:30:07,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:07,806 INFO L85 PathProgramCache]: Analyzing trace with hash 984895895, now seen corresponding path program 1 times [2022-11-20 10:30:07,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:07,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682493144] [2022-11-20 10:30:07,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:07,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:07,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:08,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:08,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:08,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682493144] [2022-11-20 10:30:08,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682493144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:30:08,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:30:08,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:30:08,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279454644] [2022-11-20 10:30:08,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:30:08,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:30:08,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:08,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:30:08,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:30:08,084 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 101 [2022-11-20 10:30:08,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 94 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:08,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:30:08,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 101 [2022-11-20 10:30:08,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:30:08,128 INFO L130 PetriNetUnfolder]: 3/100 cut-off events. [2022-11-20 10:30:08,129 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 10:30:08,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 100 events. 3/100 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 62 event pairs, 0 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 115. Up to 6 conditions per place. [2022-11-20 10:30:08,130 INFO L137 encePairwiseOnDemand]: 98/101 looper letters, 9 selfloop transitions, 2 changer transitions 0/97 dead transitions. [2022-11-20 10:30:08,131 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 97 transitions, 220 flow [2022-11-20 10:30:08,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:30:08,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:30:08,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 276 transitions. [2022-11-20 10:30:08,142 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9108910891089109 [2022-11-20 10:30:08,143 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 276 transitions. [2022-11-20 10:30:08,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 276 transitions. [2022-11-20 10:30:08,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:30:08,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 276 transitions. [2022-11-20 10:30:08,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:08,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:08,150 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:08,150 INFO L175 Difference]: Start difference. First operand has 97 places, 94 transitions, 192 flow. Second operand 3 states and 276 transitions. [2022-11-20 10:30:08,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 97 transitions, 220 flow [2022-11-20 10:30:08,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 97 transitions, 220 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 10:30:08,156 INFO L231 Difference]: Finished difference. Result has 100 places, 95 transitions, 204 flow [2022-11-20 10:30:08,156 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=100, PETRI_TRANSITIONS=95} [2022-11-20 10:30:08,157 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 1 predicate places. [2022-11-20 10:30:08,157 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 95 transitions, 204 flow [2022-11-20 10:30:08,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:08,158 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:08,158 INFO L209 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] [2022-11-20 10:30:08,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 10:30:08,159 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:30:08,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:08,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1771632260, now seen corresponding path program 1 times [2022-11-20 10:30:08,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:08,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035504257] [2022-11-20 10:30:08,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:08,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:08,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:08,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:08,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:08,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035504257] [2022-11-20 10:30:08,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035504257] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:08,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974481729] [2022-11-20 10:30:08,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:08,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:08,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:08,369 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:08,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:30:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:08,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 10:30:08,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:08,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:08,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:08,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:08,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974481729] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:30:08,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:30:08,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 10:30:08,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087421120] [2022-11-20 10:30:08,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:08,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:30:08,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:08,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:30:08,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:30:08,638 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 101 [2022-11-20 10:30:08,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 95 transitions, 204 flow. Second operand has 10 states, 10 states have (on average 88.0) internal successors, (880), 10 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:08,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:30:08,640 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 101 [2022-11-20 10:30:08,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:30:08,738 INFO L130 PetriNetUnfolder]: 3/109 cut-off events. [2022-11-20 10:30:08,738 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-20 10:30:08,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 109 events. 3/109 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 2/108 useless extension candidates. Maximal degree in co-relation 138. Up to 6 conditions per place. [2022-11-20 10:30:08,740 INFO L137 encePairwiseOnDemand]: 95/101 looper letters, 10 selfloop transitions, 9 changer transitions 0/103 dead transitions. [2022-11-20 10:30:08,740 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 103 transitions, 260 flow [2022-11-20 10:30:08,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:30:08,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 10:30:08,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 795 transitions. [2022-11-20 10:30:08,743 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8745874587458746 [2022-11-20 10:30:08,743 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 795 transitions. [2022-11-20 10:30:08,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 795 transitions. [2022-11-20 10:30:08,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:30:08,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 795 transitions. [2022-11-20 10:30:08,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 88.33333333333333) internal successors, (795), 9 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:08,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 101.0) internal successors, (1010), 10 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:08,750 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 101.0) internal successors, (1010), 10 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:08,750 INFO L175 Difference]: Start difference. First operand has 100 places, 95 transitions, 204 flow. Second operand 9 states and 795 transitions. [2022-11-20 10:30:08,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 103 transitions, 260 flow [2022-11-20 10:30:08,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 103 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 10:30:08,753 INFO L231 Difference]: Finished difference. Result has 110 places, 101 transitions, 252 flow [2022-11-20 10:30:08,754 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=252, PETRI_PLACES=110, PETRI_TRANSITIONS=101} [2022-11-20 10:30:08,755 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 11 predicate places. [2022-11-20 10:30:08,755 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 101 transitions, 252 flow [2022-11-20 10:30:08,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 88.0) internal successors, (880), 10 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:08,756 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:08,757 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:08,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:30:08,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-20 10:30:08,963 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:30:08,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:08,964 INFO L85 PathProgramCache]: Analyzing trace with hash -293511388, now seen corresponding path program 2 times [2022-11-20 10:30:08,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:08,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500332969] [2022-11-20 10:30:08,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:08,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:08,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:09,257 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:09,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:09,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500332969] [2022-11-20 10:30:09,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500332969] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:09,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256174104] [2022-11-20 10:30:09,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:30:09,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:09,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:09,272 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:09,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:30:09,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:30:09,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:30:09,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 10:30:09,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:09,454 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:09,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:09,569 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:09,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256174104] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:30:09,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:30:09,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 10:30:09,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128808186] [2022-11-20 10:30:09,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:09,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 10:30:09,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:09,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 10:30:09,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:30:09,575 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 101 [2022-11-20 10:30:09,577 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 101 transitions, 252 flow. Second operand has 18 states, 18 states have (on average 88.0) internal successors, (1584), 18 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:09,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:30:09,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 101 [2022-11-20 10:30:09,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:30:09,805 INFO L130 PetriNetUnfolder]: 3/137 cut-off events. [2022-11-20 10:30:09,805 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-20 10:30:09,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 137 events. 3/137 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 4/138 useless extension candidates. Maximal degree in co-relation 229. Up to 11 conditions per place. [2022-11-20 10:30:09,808 INFO L137 encePairwiseOnDemand]: 95/101 looper letters, 14 selfloop transitions, 21 changer transitions 0/119 dead transitions. [2022-11-20 10:30:09,808 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 119 transitions, 418 flow [2022-11-20 10:30:09,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 10:30:09,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 10:30:09,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1845 transitions. [2022-11-20 10:30:09,813 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8698727015558698 [2022-11-20 10:30:09,813 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1845 transitions. [2022-11-20 10:30:09,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1845 transitions. [2022-11-20 10:30:09,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:30:09,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1845 transitions. [2022-11-20 10:30:09,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 87.85714285714286) internal successors, (1845), 21 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:09,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 101.0) internal successors, (2222), 22 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:09,824 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 101.0) internal successors, (2222), 22 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:09,825 INFO L175 Difference]: Start difference. First operand has 110 places, 101 transitions, 252 flow. Second operand 21 states and 1845 transitions. [2022-11-20 10:30:09,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 119 transitions, 418 flow [2022-11-20 10:30:09,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 119 transitions, 404 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 10:30:09,830 INFO L231 Difference]: Finished difference. Result has 134 places, 114 transitions, 376 flow [2022-11-20 10:30:09,830 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=376, PETRI_PLACES=134, PETRI_TRANSITIONS=114} [2022-11-20 10:30:09,831 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 35 predicate places. [2022-11-20 10:30:09,831 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 114 transitions, 376 flow [2022-11-20 10:30:09,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 88.0) internal successors, (1584), 18 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:09,832 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:09,833 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:09,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:30:10,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:10,039 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:30:10,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:10,040 INFO L85 PathProgramCache]: Analyzing trace with hash -379492252, now seen corresponding path program 3 times [2022-11-20 10:30:10,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:10,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877450207] [2022-11-20 10:30:10,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:10,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:10,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:10,516 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:10,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:10,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877450207] [2022-11-20 10:30:10,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877450207] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:10,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464439645] [2022-11-20 10:30:10,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:30:10,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:10,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:10,532 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:10,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:30:10,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-20 10:30:10,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:30:10,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:30:10,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:10,814 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:10,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:11,175 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:11,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464439645] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:30:11,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:30:11,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 10:30:11,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193339226] [2022-11-20 10:30:11,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:11,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 10:30:11,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:11,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 10:30:11,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 10:30:11,184 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 101 [2022-11-20 10:30:11,187 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 114 transitions, 376 flow. Second operand has 34 states, 34 states have (on average 88.0) internal successors, (2992), 34 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:11,187 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:30:11,187 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 101 [2022-11-20 10:30:11,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:30:11,929 INFO L130 PetriNetUnfolder]: 3/193 cut-off events. [2022-11-20 10:30:11,930 INFO L131 PetriNetUnfolder]: For 262/262 co-relation queries the response was YES. [2022-11-20 10:30:11,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455 conditions, 193 events. 3/193 cut-off events. For 262/262 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 8/198 useless extension candidates. Maximal degree in co-relation 443. Up to 27 conditions per place. [2022-11-20 10:30:11,933 INFO L137 encePairwiseOnDemand]: 95/101 looper letters, 22 selfloop transitions, 45 changer transitions 0/151 dead transitions. [2022-11-20 10:30:11,933 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 151 transitions, 798 flow [2022-11-20 10:30:11,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 10:30:11,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 10:30:11,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3945 transitions. [2022-11-20 10:30:11,942 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8679867986798679 [2022-11-20 10:30:11,942 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3945 transitions. [2022-11-20 10:30:11,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3945 transitions. [2022-11-20 10:30:11,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:30:11,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3945 transitions. [2022-11-20 10:30:11,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 87.66666666666667) internal successors, (3945), 45 states have internal predecessors, (3945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:11,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 101.0) internal successors, (4646), 46 states have internal predecessors, (4646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:11,964 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 101.0) internal successors, (4646), 46 states have internal predecessors, (4646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:11,965 INFO L175 Difference]: Start difference. First operand has 134 places, 114 transitions, 376 flow. Second operand 45 states and 3945 transitions. [2022-11-20 10:30:11,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 151 transitions, 798 flow [2022-11-20 10:30:11,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 151 transitions, 758 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-20 10:30:11,972 INFO L231 Difference]: Finished difference. Result has 181 places, 139 transitions, 654 flow [2022-11-20 10:30:11,973 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=654, PETRI_PLACES=181, PETRI_TRANSITIONS=139} [2022-11-20 10:30:11,974 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 82 predicate places. [2022-11-20 10:30:11,974 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 139 transitions, 654 flow [2022-11-20 10:30:11,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 88.0) internal successors, (2992), 34 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:11,976 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:11,976 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:11,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:30:12,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:12,192 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:30:12,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:12,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1802918628, now seen corresponding path program 4 times [2022-11-20 10:30:12,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:12,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206919535] [2022-11-20 10:30:12,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:12,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:12,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:13,332 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:13,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:13,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206919535] [2022-11-20 10:30:13,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206919535] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:13,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967683913] [2022-11-20 10:30:13,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:30:13,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:13,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:13,336 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:13,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:30:13,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:30:13,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:30:13,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 10:30:13,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:13,718 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:13,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:14,551 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:14,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967683913] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:30:14,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:30:14,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 47 [2022-11-20 10:30:14,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013324534] [2022-11-20 10:30:14,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:14,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-20 10:30:14,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:14,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-20 10:30:14,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2022-11-20 10:30:14,560 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 101 [2022-11-20 10:30:14,564 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 139 transitions, 654 flow. Second operand has 47 states, 47 states have (on average 88.04255319148936) internal successors, (4138), 47 states have internal predecessors, (4138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:14,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:30:14,565 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 101 [2022-11-20 10:30:14,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:30:15,923 INFO L130 PetriNetUnfolder]: 3/242 cut-off events. [2022-11-20 10:30:15,923 INFO L131 PetriNetUnfolder]: For 1114/1114 co-relation queries the response was YES. [2022-11-20 10:30:15,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 713 conditions, 242 events. 3/242 cut-off events. For 1114/1114 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 7/246 useless extension candidates. Maximal degree in co-relation 692. Up to 40 conditions per place. [2022-11-20 10:30:15,927 INFO L137 encePairwiseOnDemand]: 95/101 looper letters, 29 selfloop transitions, 66 changer transitions 0/179 dead transitions. [2022-11-20 10:30:15,927 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 179 transitions, 1254 flow [2022-11-20 10:30:15,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-20 10:30:15,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-11-20 10:30:15,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 5778 transitions. [2022-11-20 10:30:15,937 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8667866786678667 [2022-11-20 10:30:15,938 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 5778 transitions. [2022-11-20 10:30:15,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 5778 transitions. [2022-11-20 10:30:15,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:30:15,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 5778 transitions. [2022-11-20 10:30:15,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 87.54545454545455) internal successors, (5778), 66 states have internal predecessors, (5778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:15,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 101.0) internal successors, (6767), 67 states have internal predecessors, (6767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:15,967 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 101.0) internal successors, (6767), 67 states have internal predecessors, (6767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:15,967 INFO L175 Difference]: Start difference. First operand has 181 places, 139 transitions, 654 flow. Second operand 66 states and 5778 transitions. [2022-11-20 10:30:15,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 179 transitions, 1254 flow [2022-11-20 10:30:15,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 179 transitions, 1184 flow, removed 17 selfloop flow, removed 18 redundant places. [2022-11-20 10:30:15,978 INFO L231 Difference]: Finished difference. Result has 236 places, 161 transitions, 964 flow [2022-11-20 10:30:15,978 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=964, PETRI_PLACES=236, PETRI_TRANSITIONS=161} [2022-11-20 10:30:15,979 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 137 predicate places. [2022-11-20 10:30:15,979 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 161 transitions, 964 flow [2022-11-20 10:30:15,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 88.04255319148936) internal successors, (4138), 47 states have internal predecessors, (4138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:15,981 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:30:15,981 INFO L209 CegarLoopForPetriNet]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:15,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-20 10:30:16,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 10:30:16,191 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:30:16,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:16,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1136490167, now seen corresponding path program 5 times [2022-11-20 10:30:16,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:16,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694563327] [2022-11-20 10:30:16,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:16,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:16,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:22,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1639 backedges. 0 proven. 1639 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:22,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:22,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694563327] [2022-11-20 10:30:22,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694563327] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:22,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119842278] [2022-11-20 10:30:22,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:30:22,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:22,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:22,404 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:22,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dc6770a-367f-4cee-b21b-afad97272da6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 10:30:22,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-11-20 10:30:22,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:30:22,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-20 10:30:22,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:32,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1639 backedges. 1370 proven. 269 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:32,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:44,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1639 backedges. 0 proven. 1639 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:44,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119842278] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:30:44,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:30:44,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 217 [2022-11-20 10:30:44,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466525489] [2022-11-20 10:30:44,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:44,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 217 states [2022-11-20 10:30:44,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:44,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 217 interpolants. [2022-11-20 10:30:44,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2716, Invalid=44156, Unknown=0, NotChecked=0, Total=46872 [2022-11-20 10:30:44,525 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 101 [2022-11-20 10:30:44,541 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 161 transitions, 964 flow. Second operand has 217 states, 217 states have (on average 70.16129032258064) internal successors, (15225), 217 states have internal predecessors, (15225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:30:44,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:30:44,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 101 [2022-11-20 10:30:44,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand