./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c --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_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/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_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/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_53a7c432-62bf-43ff-b921-defbf57da66d/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 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e --- 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 11:12:32,954 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:12:32,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:12:33,000 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:12:33,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:12:33,004 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:12:33,006 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:12:33,009 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:12:33,012 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:12:33,017 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:12:33,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:12:33,020 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:12:33,021 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:12:33,024 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:12:33,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:12:33,027 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:12:33,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:12:33,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:12:33,032 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:12:33,039 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:12:33,041 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:12:33,043 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:12:33,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:12:33,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:12:33,050 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:12:33,050 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:12:33,050 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:12:33,051 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:12:33,052 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:12:33,053 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:12:33,053 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:12:33,054 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:12:33,055 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:12:33,056 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:12:33,058 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:12:33,059 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:12:33,060 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:12:33,060 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:12:33,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:12:33,063 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:12:33,063 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:12:33,064 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:12:33,102 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:12:33,108 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:12:33,109 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:12:33,109 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:12:33,110 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:12:33,111 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:12:33,112 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:12:33,112 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:12:33,112 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:12:33,113 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:12:33,114 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:12:33,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:12:33,114 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:12:33,115 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:12:33,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:12:33,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:12:33,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:12:33,116 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:12:33,116 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:12:33,117 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:12:33,118 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:12:33,123 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:12:33,124 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:12:33,124 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:12:33,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:12:33,124 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:12:33,125 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:12:33,125 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:12:33,126 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:12:33,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:12:33,126 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:12:33,127 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:12:33,127 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:12:33,127 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_53a7c432-62bf-43ff-b921-defbf57da66d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e [2022-11-20 11:12:33,462 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:12:33,504 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:12:33,507 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:12:33,509 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:12:33,509 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:12:33,511 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-11-20 11:12:36,550 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:12:36,762 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:12:36,764 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-11-20 11:12:36,774 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/data/b552ce968/0d9eede43d3a498c9a25fdd6a6d04c64/FLAGe46969c8c [2022-11-20 11:12:36,791 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/data/b552ce968/0d9eede43d3a498c9a25fdd6a6d04c64 [2022-11-20 11:12:36,794 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:12:36,795 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:12:36,797 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:12:36,797 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:12:36,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:12:36,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:12:36" (1/1) ... [2022-11-20 11:12:36,803 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36453072 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:36, skipping insertion in model container [2022-11-20 11:12:36,804 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:12:36" (1/1) ... [2022-11-20 11:12:36,812 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:12:36,833 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:12:37,122 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_53a7c432-62bf-43ff-b921-defbf57da66d/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2022-11-20 11:12:37,145 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:12:37,158 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:12:37,203 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_53a7c432-62bf-43ff-b921-defbf57da66d/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2022-11-20 11:12:37,212 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:12:37,235 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:12:37,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:37 WrapperNode [2022-11-20 11:12:37,236 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:12:37,238 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:12:37,238 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:12:37,238 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:12:37,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:37" (1/1) ... [2022-11-20 11:12:37,257 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:37" (1/1) ... [2022-11-20 11:12:37,281 INFO L138 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 128 [2022-11-20 11:12:37,282 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:12:37,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:12:37,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:12:37,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:12:37,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:37" (1/1) ... [2022-11-20 11:12:37,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:37" (1/1) ... [2022-11-20 11:12:37,300 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:37" (1/1) ... [2022-11-20 11:12:37,301 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:37" (1/1) ... [2022-11-20 11:12:37,309 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:37" (1/1) ... [2022-11-20 11:12:37,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:37" (1/1) ... [2022-11-20 11:12:37,316 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:37" (1/1) ... [2022-11-20 11:12:37,318 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:37" (1/1) ... [2022-11-20 11:12:37,321 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:12:37,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:12:37,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:12:37,322 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:12:37,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:37" (1/1) ... [2022-11-20 11:12:37,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:12:37,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:12:37,364 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:12:37,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:12:37,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:12:37,414 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 11:12:37,414 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 11:12:37,415 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 11:12:37,415 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 11:12:37,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:12:37,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:12:37,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:12:37,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 11:12:37,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:12:37,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:12:37,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:12:37,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:12:37,420 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 11:12:37,536 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:12:37,538 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:12:38,020 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:12:38,031 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:12:38,031 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-20 11:12:38,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:12:38 BoogieIcfgContainer [2022-11-20 11:12:38,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:12:38,045 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:12:38,045 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:12:38,049 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:12:38,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:12:36" (1/3) ... [2022-11-20 11:12:38,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47dfff17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:12:38, skipping insertion in model container [2022-11-20 11:12:38,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:37" (2/3) ... [2022-11-20 11:12:38,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47dfff17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:12:38, skipping insertion in model container [2022-11-20 11:12:38,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:12:38" (3/3) ... [2022-11-20 11:12:38,052 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2022-11-20 11:12:38,069 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 11:12:38,082 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:12:38,082 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 11:12:38,083 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 11:12:38,205 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 11:12:38,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 212 places, 226 transitions, 468 flow [2022-11-20 11:12:38,422 INFO L130 PetriNetUnfolder]: 21/224 cut-off events. [2022-11-20 11:12:38,423 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 11:12:38,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 224 events. 21/224 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 227 event pairs, 0 based on Foata normal form. 0/202 useless extension candidates. Maximal degree in co-relation 153. Up to 3 conditions per place. [2022-11-20 11:12:38,431 INFO L82 GeneralOperation]: Start removeDead. Operand has 212 places, 226 transitions, 468 flow [2022-11-20 11:12:38,438 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 201 places, 215 transitions, 442 flow [2022-11-20 11:12:38,450 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:12:38,458 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;@749317bd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:12:38,459 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-20 11:12:38,520 INFO L130 PetriNetUnfolder]: 21/214 cut-off events. [2022-11-20 11:12:38,520 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 11:12:38,520 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:12:38,523 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:12:38,524 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 11:12:38,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:38,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1436684617, now seen corresponding path program 1 times [2022-11-20 11:12:38,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:38,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740049758] [2022-11-20 11:12:38,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:38,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:38,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:38,912 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 11:12:38,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:38,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740049758] [2022-11-20 11:12:38,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740049758] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:38,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:12:38,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:12:38,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223120663] [2022-11-20 11:12:38,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:38,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:12:38,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:38,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:12:38,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:12:38,978 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 226 [2022-11-20 11:12:38,982 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 215 transitions, 442 flow. Second operand has 2 states, 2 states have (on average 213.0) internal successors, (426), 2 states have internal predecessors, (426), 0 states have call successors, (0), 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 11:12:38,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:12:38,983 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 226 [2022-11-20 11:12:38,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:12:39,097 INFO L130 PetriNetUnfolder]: 10/204 cut-off events. [2022-11-20 11:12:39,097 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-20 11:12:39,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 204 events. 10/204 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 215 event pairs, 0 based on Foata normal form. 13/200 useless extension candidates. Maximal degree in co-relation 147. Up to 5 conditions per place. [2022-11-20 11:12:39,100 INFO L137 encePairwiseOnDemand]: 215/226 looper letters, 4 selfloop transitions, 0 changer transitions 7/204 dead transitions. [2022-11-20 11:12:39,100 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 204 transitions, 428 flow [2022-11-20 11:12:39,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:12:39,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:12:39,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 435 transitions. [2022-11-20 11:12:39,116 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9623893805309734 [2022-11-20 11:12:39,117 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 435 transitions. [2022-11-20 11:12:39,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 435 transitions. [2022-11-20 11:12:39,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:12:39,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 435 transitions. [2022-11-20 11:12:39,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 217.5) internal successors, (435), 2 states have internal predecessors, (435), 0 states have call successors, (0), 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 11:12:39,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 226.0) internal successors, (678), 3 states have internal predecessors, (678), 0 states have call successors, (0), 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 11:12:39,149 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 226.0) internal successors, (678), 3 states have internal predecessors, (678), 0 states have call successors, (0), 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 11:12:39,155 INFO L175 Difference]: Start difference. First operand has 201 places, 215 transitions, 442 flow. Second operand 2 states and 435 transitions. [2022-11-20 11:12:39,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 204 transitions, 428 flow [2022-11-20 11:12:39,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 204 transitions, 420 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-20 11:12:39,170 INFO L231 Difference]: Finished difference. Result has 198 places, 197 transitions, 398 flow [2022-11-20 11:12:39,172 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=398, PETRI_PLACES=198, PETRI_TRANSITIONS=197} [2022-11-20 11:12:39,179 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, -3 predicate places. [2022-11-20 11:12:39,179 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 197 transitions, 398 flow [2022-11-20 11:12:39,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 213.0) internal successors, (426), 2 states have internal predecessors, (426), 0 states have call successors, (0), 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 11:12:39,180 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:12:39,181 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:12:39,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:12:39,182 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 11:12:39,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:39,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1233010615, now seen corresponding path program 1 times [2022-11-20 11:12:39,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:39,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680287391] [2022-11-20 11:12:39,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:39,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:39,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:40,546 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 11:12:40,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:40,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680287391] [2022-11-20 11:12:40,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680287391] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:40,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:12:40,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 11:12:40,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968771138] [2022-11-20 11:12:40,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:40,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:12:40,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:40,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:12:40,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:12:40,567 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 226 [2022-11-20 11:12:40,570 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 197 transitions, 398 flow. Second operand has 10 states, 10 states have (on average 163.2) internal successors, (1632), 10 states have internal predecessors, (1632), 0 states have call successors, (0), 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 11:12:40,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:12:40,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 226 [2022-11-20 11:12:40,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:12:41,245 INFO L130 PetriNetUnfolder]: 54/459 cut-off events. [2022-11-20 11:12:41,245 INFO L131 PetriNetUnfolder]: For 21/25 co-relation queries the response was YES. [2022-11-20 11:12:41,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 626 conditions, 459 events. 54/459 cut-off events. For 21/25 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1909 event pairs, 12 based on Foata normal form. 2/426 useless extension candidates. Maximal degree in co-relation 623. Up to 72 conditions per place. [2022-11-20 11:12:41,250 INFO L137 encePairwiseOnDemand]: 214/226 looper letters, 82 selfloop transitions, 3 changer transitions 12/246 dead transitions. [2022-11-20 11:12:41,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 246 transitions, 698 flow [2022-11-20 11:12:41,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:12:41,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-20 11:12:41,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1691 transitions. [2022-11-20 11:12:41,258 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7482300884955753 [2022-11-20 11:12:41,259 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1691 transitions. [2022-11-20 11:12:41,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1691 transitions. [2022-11-20 11:12:41,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:12:41,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1691 transitions. [2022-11-20 11:12:41,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 169.1) internal successors, (1691), 10 states have internal predecessors, (1691), 0 states have call successors, (0), 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 11:12:41,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 226.0) internal successors, (2486), 11 states have internal predecessors, (2486), 0 states have call successors, (0), 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 11:12:41,277 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 226.0) internal successors, (2486), 11 states have internal predecessors, (2486), 0 states have call successors, (0), 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 11:12:41,277 INFO L175 Difference]: Start difference. First operand has 198 places, 197 transitions, 398 flow. Second operand 10 states and 1691 transitions. [2022-11-20 11:12:41,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 246 transitions, 698 flow [2022-11-20 11:12:41,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 246 transitions, 698 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:12:41,284 INFO L231 Difference]: Finished difference. Result has 209 places, 199 transitions, 438 flow [2022-11-20 11:12:41,285 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=438, PETRI_PLACES=209, PETRI_TRANSITIONS=199} [2022-11-20 11:12:41,286 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 8 predicate places. [2022-11-20 11:12:41,286 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 199 transitions, 438 flow [2022-11-20 11:12:41,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 163.2) internal successors, (1632), 10 states have internal predecessors, (1632), 0 states have call successors, (0), 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 11:12:41,287 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:12:41,288 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:12:41,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:12:41,288 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 11:12:41,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:41,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1966202673, now seen corresponding path program 2 times [2022-11-20 11:12:41,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:41,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937871096] [2022-11-20 11:12:41,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:41,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:41,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:42,126 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 11:12:42,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:42,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937871096] [2022-11-20 11:12:42,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937871096] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:42,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:12:42,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 11:12:42,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566521082] [2022-11-20 11:12:42,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:42,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:12:42,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:42,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:12:42,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:12:42,132 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 226 [2022-11-20 11:12:42,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 199 transitions, 438 flow. Second operand has 10 states, 10 states have (on average 163.2) internal successors, (1632), 10 states have internal predecessors, (1632), 0 states have call successors, (0), 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 11:12:42,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:12:42,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 226 [2022-11-20 11:12:42,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:12:42,689 INFO L130 PetriNetUnfolder]: 48/444 cut-off events. [2022-11-20 11:12:42,689 INFO L131 PetriNetUnfolder]: For 74/74 co-relation queries the response was YES. [2022-11-20 11:12:42,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 692 conditions, 444 events. 48/444 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1825 event pairs, 14 based on Foata normal form. 1/419 useless extension candidates. Maximal degree in co-relation 680. Up to 72 conditions per place. [2022-11-20 11:12:42,719 INFO L137 encePairwiseOnDemand]: 216/226 looper letters, 79 selfloop transitions, 3 changer transitions 14/245 dead transitions. [2022-11-20 11:12:42,720 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 245 transitions, 769 flow [2022-11-20 11:12:42,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:12:42,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-20 11:12:42,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1687 transitions. [2022-11-20 11:12:42,725 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7464601769911504 [2022-11-20 11:12:42,725 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1687 transitions. [2022-11-20 11:12:42,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1687 transitions. [2022-11-20 11:12:42,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:12:42,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1687 transitions. [2022-11-20 11:12:42,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 168.7) internal successors, (1687), 10 states have internal predecessors, (1687), 0 states have call successors, (0), 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 11:12:42,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 226.0) internal successors, (2486), 11 states have internal predecessors, (2486), 0 states have call successors, (0), 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 11:12:42,738 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 226.0) internal successors, (2486), 11 states have internal predecessors, (2486), 0 states have call successors, (0), 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 11:12:42,739 INFO L175 Difference]: Start difference. First operand has 209 places, 199 transitions, 438 flow. Second operand 10 states and 1687 transitions. [2022-11-20 11:12:42,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 245 transitions, 769 flow [2022-11-20 11:12:42,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 245 transitions, 719 flow, removed 23 selfloop flow, removed 7 redundant places. [2022-11-20 11:12:42,753 INFO L231 Difference]: Finished difference. Result has 212 places, 197 transitions, 436 flow [2022-11-20 11:12:42,754 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=436, PETRI_PLACES=212, PETRI_TRANSITIONS=197} [2022-11-20 11:12:42,760 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 11 predicate places. [2022-11-20 11:12:42,760 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 197 transitions, 436 flow [2022-11-20 11:12:42,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 163.2) internal successors, (1632), 10 states have internal predecessors, (1632), 0 states have call successors, (0), 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 11:12:42,761 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:12:42,762 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:12:42,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:12:42,762 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 11:12:42,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:42,764 INFO L85 PathProgramCache]: Analyzing trace with hash -961512767, now seen corresponding path program 1 times [2022-11-20 11:12:42,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:42,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574002772] [2022-11-20 11:12:42,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:42,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:42,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:42,863 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 11:12:42,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:42,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574002772] [2022-11-20 11:12:42,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574002772] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:42,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:12:42,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:12:42,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403141095] [2022-11-20 11:12:42,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:42,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:12:42,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:42,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:12:42,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:12:42,874 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 226 [2022-11-20 11:12:42,875 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 197 transitions, 436 flow. Second operand has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 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 11:12:42,876 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:12:42,876 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 226 [2022-11-20 11:12:42,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:12:42,957 INFO L130 PetriNetUnfolder]: 19/270 cut-off events. [2022-11-20 11:12:42,957 INFO L131 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2022-11-20 11:12:42,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343 conditions, 270 events. 19/270 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 566 event pairs, 3 based on Foata normal form. 3/256 useless extension candidates. Maximal degree in co-relation 329. Up to 16 conditions per place. [2022-11-20 11:12:42,960 INFO L137 encePairwiseOnDemand]: 222/226 looper letters, 11 selfloop transitions, 2 changer transitions 5/201 dead transitions. [2022-11-20 11:12:42,960 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 201 transitions, 488 flow [2022-11-20 11:12:42,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:12:42,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:12:42,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 620 transitions. [2022-11-20 11:12:42,963 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9144542772861357 [2022-11-20 11:12:42,963 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 620 transitions. [2022-11-20 11:12:42,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 620 transitions. [2022-11-20 11:12:42,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:12:42,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 620 transitions. [2022-11-20 11:12:42,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:42,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 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 11:12:42,974 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 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 11:12:42,975 INFO L175 Difference]: Start difference. First operand has 212 places, 197 transitions, 436 flow. Second operand 3 states and 620 transitions. [2022-11-20 11:12:42,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 201 transitions, 488 flow [2022-11-20 11:12:42,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 201 transitions, 466 flow, removed 8 selfloop flow, removed 9 redundant places. [2022-11-20 11:12:42,980 INFO L231 Difference]: Finished difference. Result has 200 places, 195 transitions, 416 flow [2022-11-20 11:12:42,981 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=416, PETRI_PLACES=200, PETRI_TRANSITIONS=195} [2022-11-20 11:12:42,982 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, -1 predicate places. [2022-11-20 11:12:42,982 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 195 transitions, 416 flow [2022-11-20 11:12:42,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 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 11:12:42,983 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:12:42,983 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:12:42,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 11:12:42,983 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 11:12:42,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:42,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1350173341, now seen corresponding path program 1 times [2022-11-20 11:12:42,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:42,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838859009] [2022-11-20 11:12:42,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:42,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:43,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:43,109 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 11:12:43,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:43,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838859009] [2022-11-20 11:12:43,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838859009] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:43,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:12:43,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:12:43,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593839730] [2022-11-20 11:12:43,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:43,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:12:43,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:43,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:12:43,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:12:43,113 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 226 [2022-11-20 11:12:43,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 195 transitions, 416 flow. Second operand has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 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 11:12:43,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:12:43,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 226 [2022-11-20 11:12:43,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:12:43,174 INFO L130 PetriNetUnfolder]: 18/284 cut-off events. [2022-11-20 11:12:43,174 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-20 11:12:43,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 284 events. 18/284 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 627 event pairs, 3 based on Foata normal form. 0/269 useless extension candidates. Maximal degree in co-relation 327. Up to 14 conditions per place. [2022-11-20 11:12:43,177 INFO L137 encePairwiseOnDemand]: 223/226 looper letters, 10 selfloop transitions, 2 changer transitions 0/199 dead transitions. [2022-11-20 11:12:43,177 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 199 transitions, 451 flow [2022-11-20 11:12:43,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:12:43,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:12:43,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 631 transitions. [2022-11-20 11:12:43,179 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9306784660766961 [2022-11-20 11:12:43,180 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 631 transitions. [2022-11-20 11:12:43,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 631 transitions. [2022-11-20 11:12:43,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:12:43,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 631 transitions. [2022-11-20 11:12:43,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 0 states have call successors, (0), 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 11:12:43,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 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 11:12:43,184 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 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 11:12:43,184 INFO L175 Difference]: Start difference. First operand has 200 places, 195 transitions, 416 flow. Second operand 3 states and 631 transitions. [2022-11-20 11:12:43,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 199 transitions, 451 flow [2022-11-20 11:12:43,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 199 transitions, 439 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-11-20 11:12:43,190 INFO L231 Difference]: Finished difference. Result has 196 places, 195 transitions, 412 flow [2022-11-20 11:12:43,190 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=412, PETRI_PLACES=196, PETRI_TRANSITIONS=195} [2022-11-20 11:12:43,193 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, -5 predicate places. [2022-11-20 11:12:43,193 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 195 transitions, 412 flow [2022-11-20 11:12:43,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 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 11:12:43,194 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:12:43,194 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:12:43,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 11:12:43,195 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 11:12:43,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:43,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1342887915, now seen corresponding path program 1 times [2022-11-20 11:12:43,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:43,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129727103] [2022-11-20 11:12:43,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:43,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:43,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:43,334 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 11:12:43,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:43,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129727103] [2022-11-20 11:12:43,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129727103] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:43,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:12:43,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:12:43,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143386773] [2022-11-20 11:12:43,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:43,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:12:43,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:43,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:12:43,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:12:43,338 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 226 [2022-11-20 11:12:43,339 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 195 transitions, 412 flow. Second operand has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 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 11:12:43,339 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:12:43,339 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 226 [2022-11-20 11:12:43,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:12:43,406 INFO L130 PetriNetUnfolder]: 21/333 cut-off events. [2022-11-20 11:12:43,407 INFO L131 PetriNetUnfolder]: For 17/18 co-relation queries the response was YES. [2022-11-20 11:12:43,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 389 conditions, 333 events. 21/333 cut-off events. For 17/18 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 846 event pairs, 2 based on Foata normal form. 0/316 useless extension candidates. Maximal degree in co-relation 382. Up to 25 conditions per place. [2022-11-20 11:12:43,409 INFO L137 encePairwiseOnDemand]: 223/226 looper letters, 9 selfloop transitions, 2 changer transitions 0/198 dead transitions. [2022-11-20 11:12:43,409 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 198 transitions, 442 flow [2022-11-20 11:12:43,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:12:43,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:12:43,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 630 transitions. [2022-11-20 11:12:43,412 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9292035398230089 [2022-11-20 11:12:43,412 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 630 transitions. [2022-11-20 11:12:43,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 630 transitions. [2022-11-20 11:12:43,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:12:43,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 630 transitions. [2022-11-20 11:12:43,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 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 11:12:43,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 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 11:12:43,416 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 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 11:12:43,416 INFO L175 Difference]: Start difference. First operand has 196 places, 195 transitions, 412 flow. Second operand 3 states and 630 transitions. [2022-11-20 11:12:43,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 198 transitions, 442 flow [2022-11-20 11:12:43,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 198 transitions, 438 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-20 11:12:43,421 INFO L231 Difference]: Finished difference. Result has 197 places, 195 transitions, 416 flow [2022-11-20 11:12:43,422 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=416, PETRI_PLACES=197, PETRI_TRANSITIONS=195} [2022-11-20 11:12:43,422 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, -4 predicate places. [2022-11-20 11:12:43,423 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 195 transitions, 416 flow [2022-11-20 11:12:43,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 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 11:12:43,423 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:12:43,424 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:12:43,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 11:12:43,424 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 11:12:43,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:43,425 INFO L85 PathProgramCache]: Analyzing trace with hash -735687843, now seen corresponding path program 1 times [2022-11-20 11:12:43,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:43,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724989171] [2022-11-20 11:12:43,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:43,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:43,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:44,594 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 11:12:44,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:44,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724989171] [2022-11-20 11:12:44,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724989171] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:44,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:12:44,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-20 11:12:44,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966724343] [2022-11-20 11:12:44,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:44,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 11:12:44,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:44,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 11:12:44,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:12:44,606 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 226 [2022-11-20 11:12:44,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 195 transitions, 416 flow. Second operand has 20 states, 20 states have (on average 141.7) internal successors, (2834), 20 states have internal predecessors, (2834), 0 states have call successors, (0), 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 11:12:44,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:12:44,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 226 [2022-11-20 11:12:44,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:12:46,763 INFO L130 PetriNetUnfolder]: 177/1577 cut-off events. [2022-11-20 11:12:46,764 INFO L131 PetriNetUnfolder]: For 64/64 co-relation queries the response was YES. [2022-11-20 11:12:46,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2329 conditions, 1577 events. 177/1577 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 11227 event pairs, 38 based on Foata normal form. 4/1476 useless extension candidates. Maximal degree in co-relation 2321. Up to 127 conditions per place. [2022-11-20 11:12:46,778 INFO L137 encePairwiseOnDemand]: 197/226 looper letters, 152 selfloop transitions, 37 changer transitions 13/331 dead transitions. [2022-11-20 11:12:46,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 331 transitions, 1108 flow [2022-11-20 11:12:46,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 11:12:46,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-20 11:12:46,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4095 transitions. [2022-11-20 11:12:46,791 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6471238938053098 [2022-11-20 11:12:46,791 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4095 transitions. [2022-11-20 11:12:46,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4095 transitions. [2022-11-20 11:12:46,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:12:46,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4095 transitions. [2022-11-20 11:12:46,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 146.25) internal successors, (4095), 28 states have internal predecessors, (4095), 0 states have call successors, (0), 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 11:12:46,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 226.0) internal successors, (6554), 29 states have internal predecessors, (6554), 0 states have call successors, (0), 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 11:12:46,821 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 226.0) internal successors, (6554), 29 states have internal predecessors, (6554), 0 states have call successors, (0), 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 11:12:46,821 INFO L175 Difference]: Start difference. First operand has 197 places, 195 transitions, 416 flow. Second operand 28 states and 4095 transitions. [2022-11-20 11:12:46,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 331 transitions, 1108 flow [2022-11-20 11:12:46,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 331 transitions, 1104 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-20 11:12:46,831 INFO L231 Difference]: Finished difference. Result has 235 places, 220 transitions, 621 flow [2022-11-20 11:12:46,831 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=621, PETRI_PLACES=235, PETRI_TRANSITIONS=220} [2022-11-20 11:12:46,832 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 34 predicate places. [2022-11-20 11:12:46,833 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 220 transitions, 621 flow [2022-11-20 11:12:46,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 141.7) internal successors, (2834), 20 states have internal predecessors, (2834), 0 states have call successors, (0), 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 11:12:46,835 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:12:46,835 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:12:46,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 11:12:46,836 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:12:46,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:46,836 INFO L85 PathProgramCache]: Analyzing trace with hash 446869077, now seen corresponding path program 1 times [2022-11-20 11:12:46,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:46,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054236396] [2022-11-20 11:12:46,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:46,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:47,433 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 11:12:47,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:47,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054236396] [2022-11-20 11:12:47,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054236396] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:12:47,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456129603] [2022-11-20 11:12:47,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:47,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:47,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:12:47,445 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:12:47,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:12:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:47,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:12:47,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:48,255 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 11:12:48,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:12:48,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:12:48,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456129603] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 11:12:48,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:12:48,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15, 14] total 30 [2022-11-20 11:12:48,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159044418] [2022-11-20 11:12:48,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:48,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:12:48,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:48,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:12:48,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2022-11-20 11:12:48,760 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 226 [2022-11-20 11:12:48,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 220 transitions, 621 flow. Second operand has 14 states, 14 states have (on average 143.14285714285714) internal successors, (2004), 14 states have internal predecessors, (2004), 0 states have call successors, (0), 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 11:12:48,763 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:12:48,763 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 226 [2022-11-20 11:12:48,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:12:49,800 INFO L130 PetriNetUnfolder]: 181/1725 cut-off events. [2022-11-20 11:12:49,800 INFO L131 PetriNetUnfolder]: For 650/658 co-relation queries the response was YES. [2022-11-20 11:12:49,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2964 conditions, 1725 events. 181/1725 cut-off events. For 650/658 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 12980 event pairs, 81 based on Foata normal form. 6/1611 useless extension candidates. Maximal degree in co-relation 2943. Up to 224 conditions per place. [2022-11-20 11:12:49,812 INFO L137 encePairwiseOnDemand]: 206/226 looper letters, 145 selfloop transitions, 22 changer transitions 7/303 dead transitions. [2022-11-20 11:12:49,813 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 303 transitions, 1218 flow [2022-11-20 11:12:49,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 11:12:49,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-20 11:12:49,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2941 transitions. [2022-11-20 11:12:49,822 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6506637168141592 [2022-11-20 11:12:49,822 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2941 transitions. [2022-11-20 11:12:49,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2941 transitions. [2022-11-20 11:12:49,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:12:49,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2941 transitions. [2022-11-20 11:12:49,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 147.05) internal successors, (2941), 20 states have internal predecessors, (2941), 0 states have call successors, (0), 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 11:12:49,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 226.0) internal successors, (4746), 21 states have internal predecessors, (4746), 0 states have call successors, (0), 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 11:12:49,853 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 226.0) internal successors, (4746), 21 states have internal predecessors, (4746), 0 states have call successors, (0), 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 11:12:49,861 INFO L175 Difference]: Start difference. First operand has 235 places, 220 transitions, 621 flow. Second operand 20 states and 2941 transitions. [2022-11-20 11:12:49,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 303 transitions, 1218 flow [2022-11-20 11:12:49,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 303 transitions, 1186 flow, removed 8 selfloop flow, removed 10 redundant places. [2022-11-20 11:12:49,873 INFO L231 Difference]: Finished difference. Result has 250 places, 226 transitions, 705 flow [2022-11-20 11:12:49,875 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=601, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=705, PETRI_PLACES=250, PETRI_TRANSITIONS=226} [2022-11-20 11:12:49,876 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 49 predicate places. [2022-11-20 11:12:49,877 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 226 transitions, 705 flow [2022-11-20 11:12:49,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 143.14285714285714) internal successors, (2004), 14 states have internal predecessors, (2004), 0 states have call successors, (0), 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 11:12:49,879 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:12:49,879 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:12:49,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:12:50,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:50,086 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:12:50,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:50,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1234195989, now seen corresponding path program 1 times [2022-11-20 11:12:50,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:50,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758445341] [2022-11-20 11:12:50,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:50,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:50,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:50,562 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 11:12:50,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:50,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758445341] [2022-11-20 11:12:50,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758445341] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:12:50,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906575105] [2022-11-20 11:12:50,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:50,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:50,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:12:50,565 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:12:50,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:12:50,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:50,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:12:50,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:51,267 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 11:12:51,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:12:51,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:12:51,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906575105] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 11:12:51,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:12:51,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15, 14] total 30 [2022-11-20 11:12:51,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946580114] [2022-11-20 11:12:51,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:51,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:12:51,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:51,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:12:51,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2022-11-20 11:12:51,782 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 226 [2022-11-20 11:12:51,785 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 226 transitions, 705 flow. Second operand has 14 states, 14 states have (on average 143.14285714285714) internal successors, (2004), 14 states have internal predecessors, (2004), 0 states have call successors, (0), 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 11:12:51,785 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:12:51,785 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 226 [2022-11-20 11:12:51,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:12:52,938 INFO L130 PetriNetUnfolder]: 236/2255 cut-off events. [2022-11-20 11:12:52,938 INFO L131 PetriNetUnfolder]: For 1252/1270 co-relation queries the response was YES. [2022-11-20 11:12:52,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4033 conditions, 2255 events. 236/2255 cut-off events. For 1252/1270 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 18627 event pairs, 111 based on Foata normal form. 6/2099 useless extension candidates. Maximal degree in co-relation 4006. Up to 410 conditions per place. [2022-11-20 11:12:52,954 INFO L137 encePairwiseOnDemand]: 209/226 looper letters, 152 selfloop transitions, 23 changer transitions 11/315 dead transitions. [2022-11-20 11:12:52,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 315 transitions, 1379 flow [2022-11-20 11:12:52,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:12:52,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-20 11:12:52,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2667 transitions. [2022-11-20 11:12:52,961 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6556047197640118 [2022-11-20 11:12:52,962 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2667 transitions. [2022-11-20 11:12:52,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2667 transitions. [2022-11-20 11:12:52,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:12:52,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2667 transitions. [2022-11-20 11:12:52,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 148.16666666666666) internal successors, (2667), 18 states have internal predecessors, (2667), 0 states have call successors, (0), 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 11:12:53,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 226.0) internal successors, (4294), 19 states have internal predecessors, (4294), 0 states have call successors, (0), 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 11:12:53,028 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 226.0) internal successors, (4294), 19 states have internal predecessors, (4294), 0 states have call successors, (0), 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 11:12:53,028 INFO L175 Difference]: Start difference. First operand has 250 places, 226 transitions, 705 flow. Second operand 18 states and 2667 transitions. [2022-11-20 11:12:53,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 315 transitions, 1379 flow [2022-11-20 11:12:53,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 315 transitions, 1318 flow, removed 20 selfloop flow, removed 11 redundant places. [2022-11-20 11:12:53,049 INFO L231 Difference]: Finished difference. Result has 260 places, 230 transitions, 771 flow [2022-11-20 11:12:53,049 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=670, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=771, PETRI_PLACES=260, PETRI_TRANSITIONS=230} [2022-11-20 11:12:53,051 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 59 predicate places. [2022-11-20 11:12:53,051 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 230 transitions, 771 flow [2022-11-20 11:12:53,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 143.14285714285714) internal successors, (2004), 14 states have internal predecessors, (2004), 0 states have call successors, (0), 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 11:12:53,052 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:12:53,052 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:12:53,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-20 11:12:53,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:53,261 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:12:53,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:53,261 INFO L85 PathProgramCache]: Analyzing trace with hash 331134781, now seen corresponding path program 2 times [2022-11-20 11:12:53,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:53,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945186934] [2022-11-20 11:12:53,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:53,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:53,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:53,812 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 11:12:53,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:53,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945186934] [2022-11-20 11:12:53,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945186934] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:12:53,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444274352] [2022-11-20 11:12:53,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:12:53,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:53,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:12:53,815 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:12:53,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:12:53,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:12:53,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:12:53,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:12:53,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:54,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:12:54,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:12:54,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444274352] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:54,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:12:54,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [15] total 25 [2022-11-20 11:12:54,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558451933] [2022-11-20 11:12:54,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:54,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:12:54,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:54,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:12:54,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2022-11-20 11:12:54,515 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 226 [2022-11-20 11:12:54,517 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 230 transitions, 771 flow. Second operand has 12 states, 12 states have (on average 160.66666666666666) internal successors, (1928), 12 states have internal predecessors, (1928), 0 states have call successors, (0), 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 11:12:54,517 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:12:54,517 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 226 [2022-11-20 11:12:54,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:12:55,665 INFO L130 PetriNetUnfolder]: 220/2490 cut-off events. [2022-11-20 11:12:55,666 INFO L131 PetriNetUnfolder]: For 1556/1602 co-relation queries the response was YES. [2022-11-20 11:12:55,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4517 conditions, 2490 events. 220/2490 cut-off events. For 1556/1602 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 21379 event pairs, 101 based on Foata normal form. 22/2359 useless extension candidates. Maximal degree in co-relation 4485. Up to 495 conditions per place. [2022-11-20 11:12:55,681 INFO L137 encePairwiseOnDemand]: 213/226 looper letters, 83 selfloop transitions, 4 changer transitions 18/266 dead transitions. [2022-11-20 11:12:55,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 266 transitions, 1115 flow [2022-11-20 11:12:55,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 11:12:55,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-20 11:12:55,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2278 transitions. [2022-11-20 11:12:55,689 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7199747155499368 [2022-11-20 11:12:55,689 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2278 transitions. [2022-11-20 11:12:55,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2278 transitions. [2022-11-20 11:12:55,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:12:55,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2278 transitions. [2022-11-20 11:12:55,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 162.71428571428572) internal successors, (2278), 14 states have internal predecessors, (2278), 0 states have call successors, (0), 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 11:12:55,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 226.0) internal successors, (3390), 15 states have internal predecessors, (3390), 0 states have call successors, (0), 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 11:12:55,709 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 226.0) internal successors, (3390), 15 states have internal predecessors, (3390), 0 states have call successors, (0), 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 11:12:55,709 INFO L175 Difference]: Start difference. First operand has 260 places, 230 transitions, 771 flow. Second operand 14 states and 2278 transitions. [2022-11-20 11:12:55,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 266 transitions, 1115 flow [2022-11-20 11:12:55,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 266 transitions, 1062 flow, removed 16 selfloop flow, removed 10 redundant places. [2022-11-20 11:12:55,723 INFO L231 Difference]: Finished difference. Result has 272 places, 230 transitions, 776 flow [2022-11-20 11:12:55,725 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=776, PETRI_PLACES=272, PETRI_TRANSITIONS=230} [2022-11-20 11:12:55,726 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 71 predicate places. [2022-11-20 11:12:55,727 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 230 transitions, 776 flow [2022-11-20 11:12:55,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 160.66666666666666) internal successors, (1928), 12 states have internal predecessors, (1928), 0 states have call successors, (0), 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 11:12:55,728 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:12:55,728 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:12:55,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:12:55,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:55,934 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:12:55,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:55,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1448724699, now seen corresponding path program 1 times [2022-11-20 11:12:55,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:55,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083098071] [2022-11-20 11:12:55,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:55,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:55,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:56,126 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 11:12:56,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:56,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083098071] [2022-11-20 11:12:56,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083098071] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:56,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:12:56,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 11:12:56,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315822572] [2022-11-20 11:12:56,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:56,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:12:56,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:56,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:12:56,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:12:56,131 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 226 [2022-11-20 11:12:56,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 230 transitions, 776 flow. Second operand has 7 states, 7 states have (on average 175.28571428571428) internal successors, (1227), 7 states have internal predecessors, (1227), 0 states have call successors, (0), 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 11:12:56,133 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:12:56,133 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 226 [2022-11-20 11:12:56,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:12:56,613 INFO L130 PetriNetUnfolder]: 293/1781 cut-off events. [2022-11-20 11:12:56,613 INFO L131 PetriNetUnfolder]: For 2215/2233 co-relation queries the response was YES. [2022-11-20 11:12:56,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3373 conditions, 1781 events. 293/1781 cut-off events. For 2215/2233 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 12707 event pairs, 143 based on Foata normal form. 1/1592 useless extension candidates. Maximal degree in co-relation 3334. Up to 430 conditions per place. [2022-11-20 11:12:56,630 INFO L137 encePairwiseOnDemand]: 215/226 looper letters, 68 selfloop transitions, 12 changer transitions 11/250 dead transitions. [2022-11-20 11:12:56,630 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 250 transitions, 1052 flow [2022-11-20 11:12:56,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:12:56,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-20 11:12:56,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1785 transitions. [2022-11-20 11:12:56,634 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7898230088495575 [2022-11-20 11:12:56,634 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1785 transitions. [2022-11-20 11:12:56,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1785 transitions. [2022-11-20 11:12:56,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:12:56,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1785 transitions. [2022-11-20 11:12:56,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 178.5) internal successors, (1785), 10 states have internal predecessors, (1785), 0 states have call successors, (0), 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 11:12:56,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 226.0) internal successors, (2486), 11 states have internal predecessors, (2486), 0 states have call successors, (0), 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 11:12:56,646 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 226.0) internal successors, (2486), 11 states have internal predecessors, (2486), 0 states have call successors, (0), 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 11:12:56,646 INFO L175 Difference]: Start difference. First operand has 272 places, 230 transitions, 776 flow. Second operand 10 states and 1785 transitions. [2022-11-20 11:12:56,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 250 transitions, 1052 flow [2022-11-20 11:12:56,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 250 transitions, 1023 flow, removed 12 selfloop flow, removed 12 redundant places. [2022-11-20 11:12:56,716 INFO L231 Difference]: Finished difference. Result has 260 places, 224 transitions, 729 flow [2022-11-20 11:12:56,717 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=731, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=729, PETRI_PLACES=260, PETRI_TRANSITIONS=224} [2022-11-20 11:12:56,717 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 59 predicate places. [2022-11-20 11:12:56,718 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 224 transitions, 729 flow [2022-11-20 11:12:56,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 175.28571428571428) internal successors, (1227), 7 states have internal predecessors, (1227), 0 states have call successors, (0), 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 11:12:56,718 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:12:56,719 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:12:56,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 11:12:56,722 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:12:56,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:56,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1914794289, now seen corresponding path program 1 times [2022-11-20 11:12:56,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:56,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485506005] [2022-11-20 11:12:56,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:56,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:56,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:56,946 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 11:12:56,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:56,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485506005] [2022-11-20 11:12:56,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485506005] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:56,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:12:56,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 11:12:56,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239980220] [2022-11-20 11:12:56,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:56,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:12:56,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:56,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:12:56,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:12:56,953 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 226 [2022-11-20 11:12:56,955 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 224 transitions, 729 flow. Second operand has 7 states, 7 states have (on average 175.28571428571428) internal successors, (1227), 7 states have internal predecessors, (1227), 0 states have call successors, (0), 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 11:12:56,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:12:56,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 226 [2022-11-20 11:12:56,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:12:57,374 INFO L130 PetriNetUnfolder]: 170/1291 cut-off events. [2022-11-20 11:12:57,375 INFO L131 PetriNetUnfolder]: For 1505/1526 co-relation queries the response was YES. [2022-11-20 11:12:57,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2452 conditions, 1291 events. 170/1291 cut-off events. For 1505/1526 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 8311 event pairs, 124 based on Foata normal form. 1/1216 useless extension candidates. Maximal degree in co-relation 2422. Up to 321 conditions per place. [2022-11-20 11:12:57,385 INFO L137 encePairwiseOnDemand]: 215/226 looper letters, 45 selfloop transitions, 8 changer transitions 33/240 dead transitions. [2022-11-20 11:12:57,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 240 transitions, 964 flow [2022-11-20 11:12:57,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:12:57,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-20 11:12:57,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1783 transitions. [2022-11-20 11:12:57,390 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7889380530973451 [2022-11-20 11:12:57,390 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1783 transitions. [2022-11-20 11:12:57,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1783 transitions. [2022-11-20 11:12:57,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:12:57,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1783 transitions. [2022-11-20 11:12:57,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 178.3) internal successors, (1783), 10 states have internal predecessors, (1783), 0 states have call successors, (0), 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 11:12:57,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 226.0) internal successors, (2486), 11 states have internal predecessors, (2486), 0 states have call successors, (0), 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 11:12:57,403 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 226.0) internal successors, (2486), 11 states have internal predecessors, (2486), 0 states have call successors, (0), 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 11:12:57,403 INFO L175 Difference]: Start difference. First operand has 260 places, 224 transitions, 729 flow. Second operand 10 states and 1783 transitions. [2022-11-20 11:12:57,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 240 transitions, 964 flow [2022-11-20 11:12:57,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 240 transitions, 929 flow, removed 8 selfloop flow, removed 10 redundant places. [2022-11-20 11:12:57,414 INFO L231 Difference]: Finished difference. Result has 258 places, 205 transitions, 606 flow [2022-11-20 11:12:57,415 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=689, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=606, PETRI_PLACES=258, PETRI_TRANSITIONS=205} [2022-11-20 11:12:57,417 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 57 predicate places. [2022-11-20 11:12:57,418 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 205 transitions, 606 flow [2022-11-20 11:12:57,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 175.28571428571428) internal successors, (1227), 7 states have internal predecessors, (1227), 0 states have call successors, (0), 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 11:12:57,419 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:12:57,419 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:12:57,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 11:12:57,420 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:12:57,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:57,420 INFO L85 PathProgramCache]: Analyzing trace with hash 877416823, now seen corresponding path program 1 times [2022-11-20 11:12:57,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:57,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184228410] [2022-11-20 11:12:57,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:57,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:57,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:57,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:12:57,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:57,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184228410] [2022-11-20 11:12:57,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184228410] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:12:57,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920974391] [2022-11-20 11:12:57,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:57,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:57,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:12:57,827 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:12:57,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:12:57,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:57,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 11:12:57,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:58,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:12:58,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:12:58,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:12:58,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920974391] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 11:12:58,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:12:58,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 23 [2022-11-20 11:12:58,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308711405] [2022-11-20 11:12:58,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:58,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:12:58,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:58,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:12:58,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2022-11-20 11:12:58,857 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 226 [2022-11-20 11:12:58,859 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 205 transitions, 606 flow. Second operand has 11 states, 11 states have (on average 172.36363636363637) internal successors, (1896), 11 states have internal predecessors, (1896), 0 states have call successors, (0), 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 11:12:58,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:12:58,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 226 [2022-11-20 11:12:58,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:12:59,451 INFO L130 PetriNetUnfolder]: 151/1086 cut-off events. [2022-11-20 11:12:59,452 INFO L131 PetriNetUnfolder]: For 828/844 co-relation queries the response was YES. [2022-11-20 11:12:59,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2000 conditions, 1086 events. 151/1086 cut-off events. For 828/844 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 6772 event pairs, 49 based on Foata normal form. 7/1046 useless extension candidates. Maximal degree in co-relation 1971. Up to 107 conditions per place. [2022-11-20 11:12:59,461 INFO L137 encePairwiseOnDemand]: 212/226 looper letters, 72 selfloop transitions, 15 changer transitions 0/239 dead transitions. [2022-11-20 11:12:59,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 239 transitions, 929 flow [2022-11-20 11:12:59,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 11:12:59,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-20 11:12:59,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2447 transitions. [2022-11-20 11:12:59,466 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7733881163084703 [2022-11-20 11:12:59,466 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2447 transitions. [2022-11-20 11:12:59,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2447 transitions. [2022-11-20 11:12:59,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:12:59,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2447 transitions. [2022-11-20 11:12:59,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 174.78571428571428) internal successors, (2447), 14 states have internal predecessors, (2447), 0 states have call successors, (0), 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 11:12:59,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 226.0) internal successors, (3390), 15 states have internal predecessors, (3390), 0 states have call successors, (0), 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 11:12:59,479 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 226.0) internal successors, (3390), 15 states have internal predecessors, (3390), 0 states have call successors, (0), 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 11:12:59,480 INFO L175 Difference]: Start difference. First operand has 258 places, 205 transitions, 606 flow. Second operand 14 states and 2447 transitions. [2022-11-20 11:12:59,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 239 transitions, 929 flow [2022-11-20 11:12:59,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 239 transitions, 827 flow, removed 26 selfloop flow, removed 24 redundant places. [2022-11-20 11:12:59,489 INFO L231 Difference]: Finished difference. Result has 230 places, 209 transitions, 579 flow [2022-11-20 11:12:59,490 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=579, PETRI_PLACES=230, PETRI_TRANSITIONS=209} [2022-11-20 11:12:59,492 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 29 predicate places. [2022-11-20 11:12:59,492 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 209 transitions, 579 flow [2022-11-20 11:12:59,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 172.36363636363637) internal successors, (1896), 11 states have internal predecessors, (1896), 0 states have call successors, (0), 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 11:12:59,493 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:12:59,493 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:12:59,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:12:59,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:59,701 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:12:59,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:59,703 INFO L85 PathProgramCache]: Analyzing trace with hash -507661719, now seen corresponding path program 1 times [2022-11-20 11:12:59,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:59,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972551020] [2022-11-20 11:12:59,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:59,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:59,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:59,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:12:59,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:59,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972551020] [2022-11-20 11:12:59,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972551020] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:59,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:12:59,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 11:12:59,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287265979] [2022-11-20 11:12:59,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:59,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:12:59,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:59,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:12:59,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:12:59,994 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 226 [2022-11-20 11:12:59,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 209 transitions, 579 flow. Second operand has 7 states, 7 states have (on average 175.85714285714286) internal successors, (1231), 7 states have internal predecessors, (1231), 0 states have call successors, (0), 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 11:12:59,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:12:59,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 226 [2022-11-20 11:12:59,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:13:00,288 INFO L130 PetriNetUnfolder]: 94/777 cut-off events. [2022-11-20 11:13:00,289 INFO L131 PetriNetUnfolder]: For 372/375 co-relation queries the response was YES. [2022-11-20 11:13:00,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1367 conditions, 777 events. 94/777 cut-off events. For 372/375 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3911 event pairs, 55 based on Foata normal form. 7/737 useless extension candidates. Maximal degree in co-relation 1348. Up to 167 conditions per place. [2022-11-20 11:13:00,293 INFO L137 encePairwiseOnDemand]: 217/226 looper letters, 59 selfloop transitions, 8 changer transitions 3/224 dead transitions. [2022-11-20 11:13:00,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 224 transitions, 778 flow [2022-11-20 11:13:00,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:13:00,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-20 11:13:00,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1431 transitions. [2022-11-20 11:13:00,299 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7914823008849557 [2022-11-20 11:13:00,300 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1431 transitions. [2022-11-20 11:13:00,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1431 transitions. [2022-11-20 11:13:00,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:13:00,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1431 transitions. [2022-11-20 11:13:00,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 178.875) internal successors, (1431), 8 states have internal predecessors, (1431), 0 states have call successors, (0), 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 11:13:00,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 226.0) internal successors, (2034), 9 states have internal predecessors, (2034), 0 states have call successors, (0), 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 11:13:00,308 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 226.0) internal successors, (2034), 9 states have internal predecessors, (2034), 0 states have call successors, (0), 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 11:13:00,308 INFO L175 Difference]: Start difference. First operand has 230 places, 209 transitions, 579 flow. Second operand 8 states and 1431 transitions. [2022-11-20 11:13:00,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 224 transitions, 778 flow [2022-11-20 11:13:00,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 224 transitions, 756 flow, removed 1 selfloop flow, removed 9 redundant places. [2022-11-20 11:13:00,315 INFO L231 Difference]: Finished difference. Result has 228 places, 208 transitions, 576 flow [2022-11-20 11:13:00,315 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=576, PETRI_PLACES=228, PETRI_TRANSITIONS=208} [2022-11-20 11:13:00,316 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 27 predicate places. [2022-11-20 11:13:00,317 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 208 transitions, 576 flow [2022-11-20 11:13:00,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 175.85714285714286) internal successors, (1231), 7 states have internal predecessors, (1231), 0 states have call successors, (0), 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 11:13:00,320 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:13:00,320 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:13:00,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 11:13:00,320 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:13:00,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:00,321 INFO L85 PathProgramCache]: Analyzing trace with hash -57791439, now seen corresponding path program 1 times [2022-11-20 11:13:00,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:13:00,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700195523] [2022-11-20 11:13:00,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:13:00,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:13:00,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:00,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:13:00,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:13:00,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700195523] [2022-11-20 11:13:00,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700195523] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:13:00,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:13:00,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 11:13:00,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095095201] [2022-11-20 11:13:00,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:13:00,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:13:00,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:13:00,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:13:00,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:13:00,502 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 226 [2022-11-20 11:13:00,504 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 208 transitions, 576 flow. Second operand has 7 states, 7 states have (on average 175.85714285714286) internal successors, (1231), 7 states have internal predecessors, (1231), 0 states have call successors, (0), 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 11:13:00,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:13:00,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 226 [2022-11-20 11:13:00,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:13:00,767 INFO L130 PetriNetUnfolder]: 113/778 cut-off events. [2022-11-20 11:13:00,768 INFO L131 PetriNetUnfolder]: For 413/446 co-relation queries the response was YES. [2022-11-20 11:13:00,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1378 conditions, 778 events. 113/778 cut-off events. For 413/446 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3773 event pairs, 64 based on Foata normal form. 27/751 useless extension candidates. Maximal degree in co-relation 1359. Up to 204 conditions per place. [2022-11-20 11:13:00,774 INFO L137 encePairwiseOnDemand]: 217/226 looper letters, 46 selfloop transitions, 6 changer transitions 13/219 dead transitions. [2022-11-20 11:13:00,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 219 transitions, 738 flow [2022-11-20 11:13:00,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:13:00,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-20 11:13:00,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1428 transitions. [2022-11-20 11:13:00,777 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7898230088495575 [2022-11-20 11:13:00,778 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1428 transitions. [2022-11-20 11:13:00,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1428 transitions. [2022-11-20 11:13:00,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:13:00,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1428 transitions. [2022-11-20 11:13:00,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 178.5) internal successors, (1428), 8 states have internal predecessors, (1428), 0 states have call successors, (0), 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 11:13:00,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 226.0) internal successors, (2034), 9 states have internal predecessors, (2034), 0 states have call successors, (0), 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 11:13:00,786 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 226.0) internal successors, (2034), 9 states have internal predecessors, (2034), 0 states have call successors, (0), 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 11:13:00,786 INFO L175 Difference]: Start difference. First operand has 228 places, 208 transitions, 576 flow. Second operand 8 states and 1428 transitions. [2022-11-20 11:13:00,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 219 transitions, 738 flow [2022-11-20 11:13:00,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 219 transitions, 721 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-11-20 11:13:00,793 INFO L231 Difference]: Finished difference. Result has 232 places, 204 transitions, 543 flow [2022-11-20 11:13:00,795 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=543, PETRI_PLACES=232, PETRI_TRANSITIONS=204} [2022-11-20 11:13:00,796 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 31 predicate places. [2022-11-20 11:13:00,796 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 204 transitions, 543 flow [2022-11-20 11:13:00,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 175.85714285714286) internal successors, (1231), 7 states have internal predecessors, (1231), 0 states have call successors, (0), 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 11:13:00,797 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:13:00,797 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:13:00,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 11:13:00,799 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:13:00,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:00,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1769429615, now seen corresponding path program 1 times [2022-11-20 11:13:00,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:13:00,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974367813] [2022-11-20 11:13:00,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:13:00,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:13:00,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:01,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:13:01,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:13:01,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974367813] [2022-11-20 11:13:01,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974367813] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:13:01,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824968954] [2022-11-20 11:13:01,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:13:01,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:13:01,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:13:01,223 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:13:01,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:13:01,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:01,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 11:13:01,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:13:01,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:13:01,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:13:02,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:13:02,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824968954] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 11:13:02,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:13:02,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 23 [2022-11-20 11:13:02,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121657529] [2022-11-20 11:13:02,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:13:02,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:13:02,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:13:02,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:13:02,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-11-20 11:13:02,329 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 226 [2022-11-20 11:13:02,331 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 204 transitions, 543 flow. Second operand has 11 states, 11 states have (on average 172.45454545454547) internal successors, (1897), 11 states have internal predecessors, (1897), 0 states have call successors, (0), 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 11:13:02,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:13:02,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 226 [2022-11-20 11:13:02,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:13:02,794 INFO L130 PetriNetUnfolder]: 102/732 cut-off events. [2022-11-20 11:13:02,794 INFO L131 PetriNetUnfolder]: For 366/397 co-relation queries the response was YES. [2022-11-20 11:13:02,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1289 conditions, 732 events. 102/732 cut-off events. For 366/397 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3618 event pairs, 24 based on Foata normal form. 36/732 useless extension candidates. Maximal degree in co-relation 1268. Up to 139 conditions per place. [2022-11-20 11:13:02,798 INFO L137 encePairwiseOnDemand]: 212/226 looper letters, 48 selfloop transitions, 13 changer transitions 0/213 dead transitions. [2022-11-20 11:13:02,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 213 transitions, 712 flow [2022-11-20 11:13:02,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:13:02,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-20 11:13:02,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2252 transitions. [2022-11-20 11:13:02,803 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7665078284547311 [2022-11-20 11:13:02,803 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2252 transitions. [2022-11-20 11:13:02,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2252 transitions. [2022-11-20 11:13:02,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:13:02,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2252 transitions. [2022-11-20 11:13:02,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 173.23076923076923) internal successors, (2252), 13 states have internal predecessors, (2252), 0 states have call successors, (0), 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 11:13:02,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 226.0) internal successors, (3164), 14 states have internal predecessors, (3164), 0 states have call successors, (0), 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 11:13:02,814 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 226.0) internal successors, (3164), 14 states have internal predecessors, (3164), 0 states have call successors, (0), 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 11:13:02,815 INFO L175 Difference]: Start difference. First operand has 232 places, 204 transitions, 543 flow. Second operand 13 states and 2252 transitions. [2022-11-20 11:13:02,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 213 transitions, 712 flow [2022-11-20 11:13:02,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 213 transitions, 677 flow, removed 9 selfloop flow, removed 10 redundant places. [2022-11-20 11:13:02,821 INFO L231 Difference]: Finished difference. Result has 230 places, 205 transitions, 556 flow [2022-11-20 11:13:02,822 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=556, PETRI_PLACES=230, PETRI_TRANSITIONS=205} [2022-11-20 11:13:02,823 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 29 predicate places. [2022-11-20 11:13:02,823 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 205 transitions, 556 flow [2022-11-20 11:13:02,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 172.45454545454547) internal successors, (1897), 11 states have internal predecessors, (1897), 0 states have call successors, (0), 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 11:13:02,824 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:13:02,824 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:13:02,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:13:03,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 11:13:03,031 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:13:03,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:03,032 INFO L85 PathProgramCache]: Analyzing trace with hash -442524039, now seen corresponding path program 1 times [2022-11-20 11:13:03,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:13:03,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602870129] [2022-11-20 11:13:03,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:13:03,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:13:03,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:04,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:13:04,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:13:04,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602870129] [2022-11-20 11:13:04,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602870129] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:13:04,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767649254] [2022-11-20 11:13:04,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:13:04,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:13:04,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:13:04,129 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:13:04,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:13:04,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:04,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-20 11:13:04,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:13:05,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:13:05,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:13:07,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:13:07,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767649254] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:13:07,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:13:07,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 20] total 46 [2022-11-20 11:13:07,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146412482] [2022-11-20 11:13:07,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:13:07,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-20 11:13:07,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:13:07,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-20 11:13:07,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=1784, Unknown=0, NotChecked=0, Total=2070 [2022-11-20 11:13:07,100 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 226 [2022-11-20 11:13:07,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 205 transitions, 556 flow. Second operand has 46 states, 46 states have (on average 133.3695652173913) internal successors, (6135), 46 states have internal predecessors, (6135), 0 states have call successors, (0), 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 11:13:07,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:13:07,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 226 [2022-11-20 11:13:07,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:13:10,127 INFO L130 PetriNetUnfolder]: 435/2664 cut-off events. [2022-11-20 11:13:10,127 INFO L131 PetriNetUnfolder]: For 1174/1294 co-relation queries the response was YES. [2022-11-20 11:13:10,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5055 conditions, 2664 events. 435/2664 cut-off events. For 1174/1294 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 22509 event pairs, 198 based on Foata normal form. 119/2658 useless extension candidates. Maximal degree in co-relation 5037. Up to 317 conditions per place. [2022-11-20 11:13:10,148 INFO L137 encePairwiseOnDemand]: 202/226 looper letters, 231 selfloop transitions, 41 changer transitions 29/421 dead transitions. [2022-11-20 11:13:10,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 421 transitions, 1825 flow [2022-11-20 11:13:10,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-20 11:13:10,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-20 11:13:10,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 4960 transitions. [2022-11-20 11:13:10,160 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6096361848574238 [2022-11-20 11:13:10,160 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 4960 transitions. [2022-11-20 11:13:10,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 4960 transitions. [2022-11-20 11:13:10,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:13:10,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 4960 transitions. [2022-11-20 11:13:10,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 137.77777777777777) internal successors, (4960), 36 states have internal predecessors, (4960), 0 states have call successors, (0), 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 11:13:10,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 226.0) internal successors, (8362), 37 states have internal predecessors, (8362), 0 states have call successors, (0), 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 11:13:10,186 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 226.0) internal successors, (8362), 37 states have internal predecessors, (8362), 0 states have call successors, (0), 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 11:13:10,186 INFO L175 Difference]: Start difference. First operand has 230 places, 205 transitions, 556 flow. Second operand 36 states and 4960 transitions. [2022-11-20 11:13:10,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 421 transitions, 1825 flow [2022-11-20 11:13:10,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 421 transitions, 1781 flow, removed 0 selfloop flow, removed 11 redundant places. [2022-11-20 11:13:10,196 INFO L231 Difference]: Finished difference. Result has 270 places, 232 transitions, 818 flow [2022-11-20 11:13:10,196 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=818, PETRI_PLACES=270, PETRI_TRANSITIONS=232} [2022-11-20 11:13:10,197 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 69 predicate places. [2022-11-20 11:13:10,197 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 232 transitions, 818 flow [2022-11-20 11:13:10,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 133.3695652173913) internal successors, (6135), 46 states have internal predecessors, (6135), 0 states have call successors, (0), 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 11:13:10,199 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:13:10,200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:13:10,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:13:10,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 11:13:10,406 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:13:10,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:10,407 INFO L85 PathProgramCache]: Analyzing trace with hash -608066667, now seen corresponding path program 1 times [2022-11-20 11:13:10,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:13:10,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208712552] [2022-11-20 11:13:10,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:13:10,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:13:10,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:11,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:13:11,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:13:11,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208712552] [2022-11-20 11:13:11,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208712552] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:13:11,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:13:11,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-20 11:13:11,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552119470] [2022-11-20 11:13:11,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:13:11,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 11:13:11,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:13:11,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 11:13:11,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:13:11,538 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 226 [2022-11-20 11:13:11,541 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 232 transitions, 818 flow. Second operand has 20 states, 20 states have (on average 153.6) internal successors, (3072), 20 states have internal predecessors, (3072), 0 states have call successors, (0), 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 11:13:11,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:13:11,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 226 [2022-11-20 11:13:11,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:13:16,304 INFO L130 PetriNetUnfolder]: 8108/21436 cut-off events. [2022-11-20 11:13:16,304 INFO L131 PetriNetUnfolder]: For 10815/10905 co-relation queries the response was YES. [2022-11-20 11:13:16,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44535 conditions, 21436 events. 8108/21436 cut-off events. For 10815/10905 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 237801 event pairs, 4201 based on Foata normal form. 14/20514 useless extension candidates. Maximal degree in co-relation 44501. Up to 5546 conditions per place. [2022-11-20 11:13:16,482 INFO L137 encePairwiseOnDemand]: 197/226 looper letters, 204 selfloop transitions, 42 changer transitions 0/408 dead transitions. [2022-11-20 11:13:16,483 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 408 transitions, 1885 flow [2022-11-20 11:13:16,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:13:16,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 11:13:16,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3394 transitions. [2022-11-20 11:13:16,489 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7151285292878213 [2022-11-20 11:13:16,490 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3394 transitions. [2022-11-20 11:13:16,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3394 transitions. [2022-11-20 11:13:16,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:13:16,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3394 transitions. [2022-11-20 11:13:16,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 161.61904761904762) internal successors, (3394), 21 states have internal predecessors, (3394), 0 states have call successors, (0), 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 11:13:16,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 226.0) internal successors, (4972), 22 states have internal predecessors, (4972), 0 states have call successors, (0), 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 11:13:16,507 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 226.0) internal successors, (4972), 22 states have internal predecessors, (4972), 0 states have call successors, (0), 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 11:13:16,508 INFO L175 Difference]: Start difference. First operand has 270 places, 232 transitions, 818 flow. Second operand 21 states and 3394 transitions. [2022-11-20 11:13:16,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 408 transitions, 1885 flow [2022-11-20 11:13:16,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 408 transitions, 1846 flow, removed 11 selfloop flow, removed 11 redundant places. [2022-11-20 11:13:16,566 INFO L231 Difference]: Finished difference. Result has 284 places, 258 transitions, 1045 flow [2022-11-20 11:13:16,567 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=779, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1045, PETRI_PLACES=284, PETRI_TRANSITIONS=258} [2022-11-20 11:13:16,567 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 83 predicate places. [2022-11-20 11:13:16,567 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 258 transitions, 1045 flow [2022-11-20 11:13:16,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 153.6) internal successors, (3072), 20 states have internal predecessors, (3072), 0 states have call successors, (0), 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 11:13:16,569 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:13:16,569 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:13:16,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-20 11:13:16,569 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:13:16,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:16,570 INFO L85 PathProgramCache]: Analyzing trace with hash 364950051, now seen corresponding path program 1 times [2022-11-20 11:13:16,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:13:16,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240567405] [2022-11-20 11:13:16,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:13:16,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:13:16,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:17,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:13:17,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:13:17,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240567405] [2022-11-20 11:13:17,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240567405] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:13:17,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814349640] [2022-11-20 11:13:17,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:13:17,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:13:17,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:13:17,738 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:13:17,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:13:17,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:17,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-20 11:13:17,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:13:18,111 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-20 11:13:18,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-11-20 11:13:18,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:13:18,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:13:18,348 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-11-20 11:13:18,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 50 [2022-11-20 11:13:18,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:13:18,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814349640] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:13:18,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:13:18,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9, 9] total 31 [2022-11-20 11:13:18,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519526285] [2022-11-20 11:13:18,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:13:18,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-20 11:13:18,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:13:18,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-20 11:13:18,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2022-11-20 11:13:18,394 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 226 [2022-11-20 11:13:18,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 258 transitions, 1045 flow. Second operand has 31 states, 31 states have (on average 154.16129032258064) internal successors, (4779), 31 states have internal predecessors, (4779), 0 states have call successors, (0), 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 11:13:18,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:13:18,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 226 [2022-11-20 11:13:18,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:13:27,624 INFO L130 PetriNetUnfolder]: 14722/36628 cut-off events. [2022-11-20 11:13:27,624 INFO L131 PetriNetUnfolder]: For 32023/32153 co-relation queries the response was YES. [2022-11-20 11:13:27,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88670 conditions, 36628 events. 14722/36628 cut-off events. For 32023/32153 co-relation queries the response was YES. Maximal size of possible extension queue 1468. Compared 427891 event pairs, 4466 based on Foata normal form. 259/36612 useless extension candidates. Maximal degree in co-relation 88631. Up to 6217 conditions per place. [2022-11-20 11:13:27,929 INFO L137 encePairwiseOnDemand]: 188/226 looper letters, 384 selfloop transitions, 118 changer transitions 0/664 dead transitions. [2022-11-20 11:13:27,929 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 664 transitions, 3762 flow [2022-11-20 11:13:27,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-20 11:13:27,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-20 11:13:27,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 6039 transitions. [2022-11-20 11:13:27,938 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7221956469744081 [2022-11-20 11:13:27,939 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 6039 transitions. [2022-11-20 11:13:27,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 6039 transitions. [2022-11-20 11:13:27,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:13:27,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 6039 transitions. [2022-11-20 11:13:27,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 163.21621621621622) internal successors, (6039), 37 states have internal predecessors, (6039), 0 states have call successors, (0), 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 11:13:27,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 226.0) internal successors, (8588), 38 states have internal predecessors, (8588), 0 states have call successors, (0), 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 11:13:27,965 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 226.0) internal successors, (8588), 38 states have internal predecessors, (8588), 0 states have call successors, (0), 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 11:13:27,965 INFO L175 Difference]: Start difference. First operand has 284 places, 258 transitions, 1045 flow. Second operand 37 states and 6039 transitions. [2022-11-20 11:13:27,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 664 transitions, 3762 flow [2022-11-20 11:13:28,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 664 transitions, 3735 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-11-20 11:13:28,385 INFO L231 Difference]: Finished difference. Result has 335 places, 348 transitions, 2047 flow [2022-11-20 11:13:28,385 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=1018, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2047, PETRI_PLACES=335, PETRI_TRANSITIONS=348} [2022-11-20 11:13:28,386 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 134 predicate places. [2022-11-20 11:13:28,386 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 348 transitions, 2047 flow [2022-11-20 11:13:28,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 154.16129032258064) internal successors, (4779), 31 states have internal predecessors, (4779), 0 states have call successors, (0), 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 11:13:28,387 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:13:28,387 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:13:28,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 11:13:28,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:13:28,598 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:13:28,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:28,599 INFO L85 PathProgramCache]: Analyzing trace with hash -362065697, now seen corresponding path program 2 times [2022-11-20 11:13:28,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:13:28,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854203325] [2022-11-20 11:13:28,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:13:28,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:13:28,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:29,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:13:29,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:13:29,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854203325] [2022-11-20 11:13:29,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854203325] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:13:29,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121141592] [2022-11-20 11:13:29,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:13:29,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:13:29,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:13:29,540 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:13:29,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:13:29,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:13:29,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:13:29,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-20 11:13:29,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:13:30,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:13:30,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 11:13:30,576 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:13:30,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 11:13:30,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:13:30,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:13:31,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:13:31,375 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-20 11:13:31,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-11-20 11:13:31,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:13:31,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:13:31,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:13:31,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121141592] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:13:31,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:13:31,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25, 9] total 49 [2022-11-20 11:13:31,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785278944] [2022-11-20 11:13:31,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:13:31,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-20 11:13:31,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:13:31,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-20 11:13:31,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=2155, Unknown=0, NotChecked=0, Total=2352 [2022-11-20 11:13:31,740 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 226 [2022-11-20 11:13:31,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 348 transitions, 2047 flow. Second operand has 49 states, 49 states have (on average 134.40816326530611) internal successors, (6586), 49 states have internal predecessors, (6586), 0 states have call successors, (0), 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 11:13:31,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:13:31,746 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 226 [2022-11-20 11:13:31,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:13:48,175 INFO L130 PetriNetUnfolder]: 20464/50449 cut-off events. [2022-11-20 11:13:48,176 INFO L131 PetriNetUnfolder]: For 145802/146917 co-relation queries the response was YES. [2022-11-20 11:13:48,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173005 conditions, 50449 events. 20464/50449 cut-off events. For 145802/146917 co-relation queries the response was YES. Maximal size of possible extension queue 1945. Compared 609411 event pairs, 1416 based on Foata normal form. 227/50225 useless extension candidates. Maximal degree in co-relation 172943. Up to 12945 conditions per place. [2022-11-20 11:13:48,865 INFO L137 encePairwiseOnDemand]: 189/226 looper letters, 425 selfloop transitions, 185 changer transitions 0/738 dead transitions. [2022-11-20 11:13:48,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 738 transitions, 6117 flow [2022-11-20 11:13:48,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-20 11:13:48,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-11-20 11:13:48,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 6100 transitions. [2022-11-20 11:13:48,887 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6134352373290426 [2022-11-20 11:13:48,887 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 6100 transitions. [2022-11-20 11:13:48,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 6100 transitions. [2022-11-20 11:13:48,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:13:48,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 6100 transitions. [2022-11-20 11:13:48,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 138.63636363636363) internal successors, (6100), 44 states have internal predecessors, (6100), 0 states have call successors, (0), 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 11:13:48,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 226.0) internal successors, (10170), 45 states have internal predecessors, (10170), 0 states have call successors, (0), 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 11:13:48,932 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 226.0) internal successors, (10170), 45 states have internal predecessors, (10170), 0 states have call successors, (0), 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 11:13:48,932 INFO L175 Difference]: Start difference. First operand has 335 places, 348 transitions, 2047 flow. Second operand 44 states and 6100 transitions. [2022-11-20 11:13:48,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 738 transitions, 6117 flow [2022-11-20 11:13:50,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 738 transitions, 5937 flow, removed 64 selfloop flow, removed 9 redundant places. [2022-11-20 11:13:50,173 INFO L231 Difference]: Finished difference. Result has 389 places, 454 transitions, 3625 flow [2022-11-20 11:13:50,174 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=1935, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=3625, PETRI_PLACES=389, PETRI_TRANSITIONS=454} [2022-11-20 11:13:50,174 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 188 predicate places. [2022-11-20 11:13:50,174 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 454 transitions, 3625 flow [2022-11-20 11:13:50,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 134.40816326530611) internal successors, (6586), 49 states have internal predecessors, (6586), 0 states have call successors, (0), 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 11:13:50,176 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:13:50,176 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:13:50,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 11:13:50,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:13:50,389 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:13:50,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:50,390 INFO L85 PathProgramCache]: Analyzing trace with hash 825127031, now seen corresponding path program 2 times [2022-11-20 11:13:50,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:13:50,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094218522] [2022-11-20 11:13:50,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:13:50,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:13:50,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:51,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:13:51,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:13:51,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094218522] [2022-11-20 11:13:51,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094218522] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:13:51,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393906960] [2022-11-20 11:13:51,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:13:51,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:13:51,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:13:51,302 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:13:51,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 11:13:51,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:13:51,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:13:51,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-20 11:13:51,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:13:52,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 11:13:52,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:13:52,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:13:53,088 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 11:13:53,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-11-20 11:13:53,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:13:53,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:13:53,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:13:53,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393906960] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:13:53,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:13:53,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24, 9] total 43 [2022-11-20 11:13:53,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593751478] [2022-11-20 11:13:53,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:13:53,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-20 11:13:53,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:13:53,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-20 11:13:53,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1629, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 11:13:53,392 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 226 [2022-11-20 11:13:53,396 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 454 transitions, 3625 flow. Second operand has 43 states, 43 states have (on average 137.67441860465115) internal successors, (5920), 43 states have internal predecessors, (5920), 0 states have call successors, (0), 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 11:13:53,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:13:53,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 226 [2022-11-20 11:13:53,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:14:10,427 INFO L130 PetriNetUnfolder]: 19666/47386 cut-off events. [2022-11-20 11:14:10,427 INFO L131 PetriNetUnfolder]: For 214239/214889 co-relation queries the response was YES. [2022-11-20 11:14:10,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182187 conditions, 47386 events. 19666/47386 cut-off events. For 214239/214889 co-relation queries the response was YES. Maximal size of possible extension queue 1747. Compared 558915 event pairs, 6119 based on Foata normal form. 183/47228 useless extension candidates. Maximal degree in co-relation 182105. Up to 8685 conditions per place. [2022-11-20 11:14:11,084 INFO L137 encePairwiseOnDemand]: 187/226 looper letters, 518 selfloop transitions, 186 changer transitions 0/835 dead transitions. [2022-11-20 11:14:11,085 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 835 transitions, 8365 flow [2022-11-20 11:14:11,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-20 11:14:11,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-11-20 11:14:11,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 5926 transitions. [2022-11-20 11:14:11,094 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6395424131232462 [2022-11-20 11:14:11,095 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 5926 transitions. [2022-11-20 11:14:11,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 5926 transitions. [2022-11-20 11:14:11,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:14:11,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 5926 transitions. [2022-11-20 11:14:11,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 144.53658536585365) internal successors, (5926), 41 states have internal predecessors, (5926), 0 states have call successors, (0), 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 11:14:11,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 226.0) internal successors, (9492), 42 states have internal predecessors, (9492), 0 states have call successors, (0), 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 11:14:11,118 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 226.0) internal successors, (9492), 42 states have internal predecessors, (9492), 0 states have call successors, (0), 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 11:14:11,118 INFO L175 Difference]: Start difference. First operand has 389 places, 454 transitions, 3625 flow. Second operand 41 states and 5926 transitions. [2022-11-20 11:14:11,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 835 transitions, 8365 flow [2022-11-20 11:14:14,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 835 transitions, 7821 flow, removed 173 selfloop flow, removed 22 redundant places. [2022-11-20 11:14:14,043 INFO L231 Difference]: Finished difference. Result has 413 places, 460 transitions, 3839 flow [2022-11-20 11:14:14,044 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=3331, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=3839, PETRI_PLACES=413, PETRI_TRANSITIONS=460} [2022-11-20 11:14:14,045 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 212 predicate places. [2022-11-20 11:14:14,045 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 460 transitions, 3839 flow [2022-11-20 11:14:14,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 137.67441860465115) internal successors, (5920), 43 states have internal predecessors, (5920), 0 states have call successors, (0), 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 11:14:14,045 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:14:14,046 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:14:14,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:14,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53a7c432-62bf-43ff-b921-defbf57da66d/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-20 11:14:14,247 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:14:14,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:14,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1453298209, now seen corresponding path program 3 times [2022-11-20 11:14:14,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:14,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426152315] [2022-11-20 11:14:14,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:14,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:14,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:14:15,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:15,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426152315] [2022-11-20 11:14:15,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426152315] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:14:15,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:14:15,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-11-20 11:14:15,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762245694] [2022-11-20 11:14:15,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:14:15,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 11:14:15,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:15,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 11:14:15,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:14:15,368 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 226 [2022-11-20 11:14:15,370 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 460 transitions, 3839 flow. Second operand has 21 states, 21 states have (on average 153.47619047619048) internal successors, (3223), 21 states have internal predecessors, (3223), 0 states have call successors, (0), 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 11:14:15,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:14:15,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 226 [2022-11-20 11:14:15,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand