./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/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_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/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_4657cfd4-7382-43d3-b3d3-0dc9473b9150/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 3465c34fa1c26a5c7a3494350123ab41e5828c33cb08ac3f67b81737d460e559 --- 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 12:14:38,907 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 12:14:38,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 12:14:38,960 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 12:14:38,962 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 12:14:38,967 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 12:14:38,970 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 12:14:38,974 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 12:14:38,976 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 12:14:38,983 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 12:14:38,985 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 12:14:38,988 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 12:14:38,989 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 12:14:38,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 12:14:38,995 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 12:14:38,998 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 12:14:39,000 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 12:14:39,001 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 12:14:39,003 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 12:14:39,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 12:14:39,013 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 12:14:39,015 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 12:14:39,017 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 12:14:39,018 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 12:14:39,031 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 12:14:39,032 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 12:14:39,032 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 12:14:39,035 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 12:14:39,036 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 12:14:39,037 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 12:14:39,038 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 12:14:39,039 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 12:14:39,043 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 12:14:39,044 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 12:14:39,046 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 12:14:39,046 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 12:14:39,047 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 12:14:39,048 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 12:14:39,048 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 12:14:39,050 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 12:14:39,052 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 12:14:39,053 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 12:14:39,103 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 12:14:39,104 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 12:14:39,104 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 12:14:39,105 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 12:14:39,106 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 12:14:39,107 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 12:14:39,107 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 12:14:39,108 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 12:14:39,108 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 12:14:39,109 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 12:14:39,110 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 12:14:39,110 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 12:14:39,111 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 12:14:39,111 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 12:14:39,112 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 12:14:39,112 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 12:14:39,112 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 12:14:39,113 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 12:14:39,113 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 12:14:39,113 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 12:14:39,114 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 12:14:39,114 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 12:14:39,115 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 12:14:39,115 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 12:14:39,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:14:39,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 12:14:39,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 12:14:39,116 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 12:14:39,117 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 12:14:39,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 12:14:39,118 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 12:14:39,118 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 12:14:39,119 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 12:14:39,119 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_4657cfd4-7382-43d3-b3d3-0dc9473b9150/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3465c34fa1c26a5c7a3494350123ab41e5828c33cb08ac3f67b81737d460e559 [2022-11-20 12:14:39,488 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 12:14:39,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 12:14:39,530 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 12:14:39,532 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 12:14:39,533 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 12:14:39,534 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i [2022-11-20 12:14:42,905 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 12:14:43,220 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 12:14:43,222 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i [2022-11-20 12:14:43,240 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/data/e8b438427/8f5756882c594bfd9d311b9dcfd88da9/FLAGd1d7cb519 [2022-11-20 12:14:43,263 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/data/e8b438427/8f5756882c594bfd9d311b9dcfd88da9 [2022-11-20 12:14:43,267 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 12:14:43,269 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 12:14:43,273 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 12:14:43,273 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 12:14:43,277 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 12:14:43,278 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:14:43" (1/1) ... [2022-11-20 12:14:43,279 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b404865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:43, skipping insertion in model container [2022-11-20 12:14:43,280 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:14:43" (1/1) ... [2022-11-20 12:14:43,290 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 12:14:43,359 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:14:43,837 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_4657cfd4-7382-43d3-b3d3-0dc9473b9150/sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i[30176,30189] [2022-11-20 12:14:43,883 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:14:43,900 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 12:14:43,949 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_4657cfd4-7382-43d3-b3d3-0dc9473b9150/sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i[30176,30189] [2022-11-20 12:14:43,977 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:14:44,041 INFO L208 MainTranslator]: Completed translation [2022-11-20 12:14:44,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:44 WrapperNode [2022-11-20 12:14:44,041 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 12:14:44,042 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 12:14:44,043 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 12:14:44,043 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 12:14:44,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:44" (1/1) ... [2022-11-20 12:14:44,066 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:44" (1/1) ... [2022-11-20 12:14:44,107 INFO L138 Inliner]: procedures = 170, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2022-11-20 12:14:44,108 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 12:14:44,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 12:14:44,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 12:14:44,109 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 12:14:44,120 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:44" (1/1) ... [2022-11-20 12:14:44,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:44" (1/1) ... [2022-11-20 12:14:44,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:44" (1/1) ... [2022-11-20 12:14:44,124 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:44" (1/1) ... [2022-11-20 12:14:44,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:44" (1/1) ... [2022-11-20 12:14:44,137 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:44" (1/1) ... [2022-11-20 12:14:44,139 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:44" (1/1) ... [2022-11-20 12:14:44,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:44" (1/1) ... [2022-11-20 12:14:44,143 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 12:14:44,144 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 12:14:44,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 12:14:44,145 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 12:14:44,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:44" (1/1) ... [2022-11-20 12:14:44,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:14:44,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:14:44,189 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 12:14:44,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 12:14:44,239 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 12:14:44,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 12:14:44,239 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-20 12:14:44,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 12:14:44,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 12:14:44,240 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-20 12:14:44,240 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-20 12:14:44,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 12:14:44,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 12:14:44,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 12:14:44,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 12:14:44,246 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 12:14:44,470 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 12:14:44,472 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 12:14:44,775 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 12:14:44,782 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 12:14:44,783 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-11-20 12:14:44,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:14:44 BoogieIcfgContainer [2022-11-20 12:14:44,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 12:14:44,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 12:14:44,789 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 12:14:44,792 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 12:14:44,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:14:43" (1/3) ... [2022-11-20 12:14:44,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59b38d9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:14:44, skipping insertion in model container [2022-11-20 12:14:44,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:44" (2/3) ... [2022-11-20 12:14:44,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59b38d9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:14:44, skipping insertion in model container [2022-11-20 12:14:44,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:14:44" (3/3) ... [2022-11-20 12:14:44,796 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_61-invariant_racing.i [2022-11-20 12:14:44,805 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 12:14:44,818 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 12:14:44,818 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 12:14:44,818 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 12:14:44,877 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-20 12:14:44,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 130 transitions, 268 flow [2022-11-20 12:14:44,994 INFO L130 PetriNetUnfolder]: 30/188 cut-off events. [2022-11-20 12:14:44,994 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 12:14:45,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 188 events. 30/188 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 562 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 94. Up to 6 conditions per place. [2022-11-20 12:14:45,004 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 130 transitions, 268 flow [2022-11-20 12:14:45,010 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 125 transitions, 255 flow [2022-11-20 12:14:45,024 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:14:45,030 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;@50917d7f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:14:45,030 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 12:14:45,059 INFO L130 PetriNetUnfolder]: 10/103 cut-off events. [2022-11-20 12:14:45,066 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 12:14:45,066 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:45,067 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] [2022-11-20 12:14:45,068 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:14:45,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:45,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1062996739, now seen corresponding path program 1 times [2022-11-20 12:14:45,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:45,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712645423] [2022-11-20 12:14:45,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:45,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:45,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:45,348 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 12:14:45,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:45,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712645423] [2022-11-20 12:14:45,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712645423] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:14:45,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:14:45,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:14:45,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751985915] [2022-11-20 12:14:45,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:14:45,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 12:14:45,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:45,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 12:14:45,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 12:14:45,395 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 130 [2022-11-20 12:14:45,399 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 125 transitions, 255 flow. Second operand has 2 states, 2 states have (on average 111.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 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 12:14:45,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:14:45,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 130 [2022-11-20 12:14:45,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:14:45,457 INFO L130 PetriNetUnfolder]: 1/153 cut-off events. [2022-11-20 12:14:45,458 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 12:14:45,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 153 events. 1/153 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 239 event pairs, 0 based on Foata normal form. 28/174 useless extension candidates. Maximal degree in co-relation 78. Up to 2 conditions per place. [2022-11-20 12:14:45,460 INFO L137 encePairwiseOnDemand]: 113/130 looper letters, 1 selfloop transitions, 0 changer transitions 0/107 dead transitions. [2022-11-20 12:14:45,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 107 transitions, 221 flow [2022-11-20 12:14:45,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 12:14:45,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 12:14:45,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 238 transitions. [2022-11-20 12:14:45,485 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9153846153846154 [2022-11-20 12:14:45,486 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 238 transitions. [2022-11-20 12:14:45,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 238 transitions. [2022-11-20 12:14:45,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:14:45,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 238 transitions. [2022-11-20 12:14:45,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 119.0) internal successors, (238), 2 states have internal predecessors, (238), 0 states have call successors, (0), 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 12:14:45,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 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 12:14:45,510 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 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 12:14:45,512 INFO L175 Difference]: Start difference. First operand has 110 places, 125 transitions, 255 flow. Second operand 2 states and 238 transitions. [2022-11-20 12:14:45,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 107 transitions, 221 flow [2022-11-20 12:14:45,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 107 transitions, 221 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:14:45,530 INFO L231 Difference]: Finished difference. Result has 110 places, 107 transitions, 219 flow [2022-11-20 12:14:45,532 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=219, PETRI_PLACES=110, PETRI_TRANSITIONS=107} [2022-11-20 12:14:45,543 INFO L288 CegarLoopForPetriNet]: 110 programPoint places, 0 predicate places. [2022-11-20 12:14:45,543 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 107 transitions, 219 flow [2022-11-20 12:14:45,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 111.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 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 12:14:45,544 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:45,545 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:45,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 12:14:45,546 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:14:45,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:45,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1889734253, now seen corresponding path program 1 times [2022-11-20 12:14:45,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:45,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621443759] [2022-11-20 12:14:45,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:45,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:45,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:14:45,615 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 12:14:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:14:45,710 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 12:14:45,710 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 12:14:45,712 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 12:14:45,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 12:14:45,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 12:14:45,718 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-20 12:14:45,721 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 12:14:45,723 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-20 12:14:45,785 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 12:14:45,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 163 transitions, 344 flow [2022-11-20 12:14:45,906 INFO L130 PetriNetUnfolder]: 51/304 cut-off events. [2022-11-20 12:14:45,906 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-20 12:14:45,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 304 events. 51/304 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1036 event pairs, 0 based on Foata normal form. 0/246 useless extension candidates. Maximal degree in co-relation 190. Up to 9 conditions per place. [2022-11-20 12:14:45,912 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 163 transitions, 344 flow [2022-11-20 12:14:45,918 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 163 transitions, 344 flow [2022-11-20 12:14:45,920 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:14:45,923 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;@50917d7f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:14:45,928 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 12:14:45,952 INFO L130 PetriNetUnfolder]: 10/103 cut-off events. [2022-11-20 12:14:45,953 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 12:14:45,953 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:45,953 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] [2022-11-20 12:14:45,954 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:14:45,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:45,961 INFO L85 PathProgramCache]: Analyzing trace with hash 613293600, now seen corresponding path program 1 times [2022-11-20 12:14:45,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:45,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822123953] [2022-11-20 12:14:45,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:45,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:46,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:46,091 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 12:14:46,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:46,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822123953] [2022-11-20 12:14:46,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822123953] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:14:46,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:14:46,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:14:46,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116268116] [2022-11-20 12:14:46,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:14:46,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 12:14:46,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:46,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 12:14:46,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 12:14:46,110 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 163 [2022-11-20 12:14:46,110 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 163 transitions, 344 flow. Second operand has 2 states, 2 states have (on average 136.0) internal successors, (272), 2 states have internal predecessors, (272), 0 states have call successors, (0), 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 12:14:46,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:14:46,111 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 163 [2022-11-20 12:14:46,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:14:46,185 INFO L130 PetriNetUnfolder]: 5/255 cut-off events. [2022-11-20 12:14:46,185 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-20 12:14:46,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 255 events. 5/255 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 654 event pairs, 0 based on Foata normal form. 60/303 useless extension candidates. Maximal degree in co-relation 162. Up to 7 conditions per place. [2022-11-20 12:14:46,189 INFO L137 encePairwiseOnDemand]: 140/163 looper letters, 4 selfloop transitions, 0 changer transitions 0/139 dead transitions. [2022-11-20 12:14:46,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 139 transitions, 304 flow [2022-11-20 12:14:46,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 12:14:46,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 12:14:46,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 297 transitions. [2022-11-20 12:14:46,197 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.911042944785276 [2022-11-20 12:14:46,197 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 297 transitions. [2022-11-20 12:14:46,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 297 transitions. [2022-11-20 12:14:46,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:14:46,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 297 transitions. [2022-11-20 12:14:46,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 148.5) internal successors, (297), 2 states have internal predecessors, (297), 0 states have call successors, (0), 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 12:14:46,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 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 12:14:46,202 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 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 12:14:46,202 INFO L175 Difference]: Start difference. First operand has 141 places, 163 transitions, 344 flow. Second operand 2 states and 297 transitions. [2022-11-20 12:14:46,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 139 transitions, 304 flow [2022-11-20 12:14:46,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 139 transitions, 304 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:14:46,210 INFO L231 Difference]: Finished difference. Result has 141 places, 139 transitions, 296 flow [2022-11-20 12:14:46,210 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=296, PETRI_PLACES=141, PETRI_TRANSITIONS=139} [2022-11-20 12:14:46,211 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 0 predicate places. [2022-11-20 12:14:46,212 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 139 transitions, 296 flow [2022-11-20 12:14:46,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 136.0) internal successors, (272), 2 states have internal predecessors, (272), 0 states have call successors, (0), 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 12:14:46,212 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:46,213 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:46,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 12:14:46,213 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:14:46,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:46,214 INFO L85 PathProgramCache]: Analyzing trace with hash -348807653, now seen corresponding path program 1 times [2022-11-20 12:14:46,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:46,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251019077] [2022-11-20 12:14:46,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:46,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:46,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:14:46,285 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 12:14:46,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:14:46,312 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 12:14:46,312 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 12:14:46,312 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 12:14:46,313 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 12:14:46,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 12:14:46,313 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-20 12:14:46,314 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 12:14:46,314 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-20 12:14:46,342 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-20 12:14:46,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 196 transitions, 422 flow [2022-11-20 12:14:46,415 INFO L130 PetriNetUnfolder]: 77/453 cut-off events. [2022-11-20 12:14:46,415 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-20 12:14:46,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 453 events. 77/453 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1692 event pairs, 1 based on Foata normal form. 0/368 useless extension candidates. Maximal degree in co-relation 312. Up to 16 conditions per place. [2022-11-20 12:14:46,419 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 196 transitions, 422 flow [2022-11-20 12:14:46,423 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 168 places, 196 transitions, 422 flow [2022-11-20 12:14:46,425 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:14:46,426 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;@50917d7f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:14:46,426 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 12:14:46,437 INFO L130 PetriNetUnfolder]: 10/103 cut-off events. [2022-11-20 12:14:46,437 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 12:14:46,437 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:46,438 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] [2022-11-20 12:14:46,438 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:14:46,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:46,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1996567780, now seen corresponding path program 1 times [2022-11-20 12:14:46,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:46,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574976991] [2022-11-20 12:14:46,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:46,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:46,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:46,514 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 12:14:46,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:46,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574976991] [2022-11-20 12:14:46,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574976991] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:14:46,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:14:46,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:14:46,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986163487] [2022-11-20 12:14:46,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:14:46,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 12:14:46,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:46,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 12:14:46,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 12:14:46,518 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 196 [2022-11-20 12:14:46,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 196 transitions, 422 flow. Second operand has 2 states, 2 states have (on average 161.0) internal successors, (322), 2 states have internal predecessors, (322), 0 states have call successors, (0), 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 12:14:46,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:14:46,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 196 [2022-11-20 12:14:46,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:14:46,627 INFO L130 PetriNetUnfolder]: 11/383 cut-off events. [2022-11-20 12:14:46,627 INFO L131 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-11-20 12:14:46,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 427 conditions, 383 events. 11/383 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1223 event pairs, 1 based on Foata normal form. 129/493 useless extension candidates. Maximal degree in co-relation 269. Up to 16 conditions per place. [2022-11-20 12:14:46,652 INFO L137 encePairwiseOnDemand]: 167/196 looper letters, 6 selfloop transitions, 0 changer transitions 0/166 dead transitions. [2022-11-20 12:14:46,653 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 166 transitions, 374 flow [2022-11-20 12:14:46,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 12:14:46,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 12:14:46,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 355 transitions. [2022-11-20 12:14:46,658 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9056122448979592 [2022-11-20 12:14:46,659 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 355 transitions. [2022-11-20 12:14:46,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 355 transitions. [2022-11-20 12:14:46,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:14:46,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 355 transitions. [2022-11-20 12:14:46,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 177.5) internal successors, (355), 2 states have internal predecessors, (355), 0 states have call successors, (0), 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 12:14:46,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 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 12:14:46,662 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 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 12:14:46,662 INFO L175 Difference]: Start difference. First operand has 168 places, 196 transitions, 422 flow. Second operand 2 states and 355 transitions. [2022-11-20 12:14:46,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 166 transitions, 374 flow [2022-11-20 12:14:46,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 166 transitions, 374 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:14:46,674 INFO L231 Difference]: Finished difference. Result has 168 places, 166 transitions, 362 flow [2022-11-20 12:14:46,675 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=362, PETRI_PLACES=168, PETRI_TRANSITIONS=166} [2022-11-20 12:14:46,679 INFO L288 CegarLoopForPetriNet]: 168 programPoint places, 0 predicate places. [2022-11-20 12:14:46,679 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 166 transitions, 362 flow [2022-11-20 12:14:46,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 161.0) internal successors, (322), 2 states have internal predecessors, (322), 0 states have call successors, (0), 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 12:14:46,680 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:46,680 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] [2022-11-20 12:14:46,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 12:14:46,681 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:14:46,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:46,681 INFO L85 PathProgramCache]: Analyzing trace with hash 196412074, now seen corresponding path program 1 times [2022-11-20 12:14:46,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:46,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369511228] [2022-11-20 12:14:46,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:46,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:46,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:46,824 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 12:14:46,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:46,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369511228] [2022-11-20 12:14:46,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369511228] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:14:46,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:14:46,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:14:46,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374226880] [2022-11-20 12:14:46,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:14:46,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:14:46,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:46,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:14:46,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:14:46,831 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 196 [2022-11-20 12:14:46,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 166 transitions, 362 flow. Second operand has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 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 12:14:46,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:14:46,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 196 [2022-11-20 12:14:46,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:14:46,938 INFO L130 PetriNetUnfolder]: 10/350 cut-off events. [2022-11-20 12:14:46,938 INFO L131 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-11-20 12:14:46,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 350 events. 10/350 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1022 event pairs, 1 based on Foata normal form. 0/333 useless extension candidates. Maximal degree in co-relation 408. Up to 30 conditions per place. [2022-11-20 12:14:46,942 INFO L137 encePairwiseOnDemand]: 193/196 looper letters, 15 selfloop transitions, 2 changer transitions 0/170 dead transitions. [2022-11-20 12:14:46,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 170 transitions, 404 flow [2022-11-20 12:14:46,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:14:46,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 12:14:46,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 477 transitions. [2022-11-20 12:14:46,944 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8112244897959183 [2022-11-20 12:14:46,944 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 477 transitions. [2022-11-20 12:14:46,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 477 transitions. [2022-11-20 12:14:46,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:14:46,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 477 transitions. [2022-11-20 12:14:46,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 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 12:14:46,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 0 states have call successors, (0), 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 12:14:46,951 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 0 states have call successors, (0), 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 12:14:46,951 INFO L175 Difference]: Start difference. First operand has 168 places, 166 transitions, 362 flow. Second operand 3 states and 477 transitions. [2022-11-20 12:14:46,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 170 transitions, 404 flow [2022-11-20 12:14:46,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 170 transitions, 404 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:14:46,958 INFO L231 Difference]: Finished difference. Result has 171 places, 167 transitions, 374 flow [2022-11-20 12:14:46,958 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=374, PETRI_PLACES=171, PETRI_TRANSITIONS=167} [2022-11-20 12:14:46,962 INFO L288 CegarLoopForPetriNet]: 168 programPoint places, 3 predicate places. [2022-11-20 12:14:46,962 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 167 transitions, 374 flow [2022-11-20 12:14:46,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 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 12:14:46,963 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:46,963 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:46,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 12:14:46,963 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:14:46,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:46,964 INFO L85 PathProgramCache]: Analyzing trace with hash 882026184, now seen corresponding path program 1 times [2022-11-20 12:14:46,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:46,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258601205] [2022-11-20 12:14:46,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:46,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:47,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:14:47,018 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 12:14:47,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:14:47,064 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 12:14:47,065 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 12:14:47,065 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 12:14:47,065 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 12:14:47,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 12:14:47,066 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-20 12:14:47,066 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 12:14:47,067 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-20 12:14:47,138 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-20 12:14:47,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 229 transitions, 502 flow [2022-11-20 12:14:47,320 INFO L130 PetriNetUnfolder]: 115/670 cut-off events. [2022-11-20 12:14:47,320 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-20 12:14:47,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 725 conditions, 670 events. 115/670 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2766 event pairs, 6 based on Foata normal form. 0/550 useless extension candidates. Maximal degree in co-relation 473. Up to 32 conditions per place. [2022-11-20 12:14:47,326 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 229 transitions, 502 flow [2022-11-20 12:14:47,335 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 229 transitions, 502 flow [2022-11-20 12:14:47,336 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:14:47,347 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;@50917d7f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:14:47,348 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 12:14:47,364 INFO L130 PetriNetUnfolder]: 10/103 cut-off events. [2022-11-20 12:14:47,364 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 12:14:47,364 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:47,367 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] [2022-11-20 12:14:47,367 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:14:47,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:47,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1208141495, now seen corresponding path program 1 times [2022-11-20 12:14:47,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:47,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630867894] [2022-11-20 12:14:47,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:47,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:47,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:47,405 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 12:14:47,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:47,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630867894] [2022-11-20 12:14:47,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630867894] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:14:47,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:14:47,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:14:47,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681222200] [2022-11-20 12:14:47,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:14:47,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 12:14:47,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:47,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 12:14:47,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 12:14:47,411 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 229 [2022-11-20 12:14:47,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 229 transitions, 502 flow. Second operand has 2 states, 2 states have (on average 186.0) internal successors, (372), 2 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:47,413 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:14:47,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 229 [2022-11-20 12:14:47,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:14:47,591 INFO L130 PetriNetUnfolder]: 25/575 cut-off events. [2022-11-20 12:14:47,591 INFO L131 PetriNetUnfolder]: For 122/122 co-relation queries the response was YES. [2022-11-20 12:14:47,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 667 conditions, 575 events. 25/575 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2202 event pairs, 6 based on Foata normal form. 280/825 useless extension candidates. Maximal degree in co-relation 418. Up to 37 conditions per place. [2022-11-20 12:14:47,598 INFO L137 encePairwiseOnDemand]: 194/229 looper letters, 8 selfloop transitions, 0 changer transitions 0/193 dead transitions. [2022-11-20 12:14:47,598 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 193 transitions, 446 flow [2022-11-20 12:14:47,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 12:14:47,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 12:14:47,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 413 transitions. [2022-11-20 12:14:47,603 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9017467248908297 [2022-11-20 12:14:47,603 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 413 transitions. [2022-11-20 12:14:47,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 413 transitions. [2022-11-20 12:14:47,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:14:47,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 413 transitions. [2022-11-20 12:14:47,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 206.5) internal successors, (413), 2 states have internal predecessors, (413), 0 states have call successors, (0), 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 12:14:47,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 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 12:14:47,607 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 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 12:14:47,607 INFO L175 Difference]: Start difference. First operand has 195 places, 229 transitions, 502 flow. Second operand 2 states and 413 transitions. [2022-11-20 12:14:47,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 193 transitions, 446 flow [2022-11-20 12:14:47,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 193 transitions, 446 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:14:47,613 INFO L231 Difference]: Finished difference. Result has 195 places, 193 transitions, 430 flow [2022-11-20 12:14:47,613 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=430, PETRI_PLACES=195, PETRI_TRANSITIONS=193} [2022-11-20 12:14:47,615 INFO L288 CegarLoopForPetriNet]: 195 programPoint places, 0 predicate places. [2022-11-20 12:14:47,616 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 193 transitions, 430 flow [2022-11-20 12:14:47,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 186.0) internal successors, (372), 2 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:47,616 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:47,616 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] [2022-11-20 12:14:47,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 12:14:47,617 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:14:47,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:47,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1286607914, now seen corresponding path program 1 times [2022-11-20 12:14:47,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:47,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729666749] [2022-11-20 12:14:47,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:47,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:47,701 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 12:14:47,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:47,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729666749] [2022-11-20 12:14:47,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729666749] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:14:47,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:14:47,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:14:47,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618251030] [2022-11-20 12:14:47,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:14:47,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:14:47,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:47,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:14:47,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:14:47,707 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 229 [2022-11-20 12:14:47,708 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 193 transitions, 430 flow. Second operand has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 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 12:14:47,708 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:14:47,708 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 229 [2022-11-20 12:14:47,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:14:47,920 INFO L130 PetriNetUnfolder]: 24/542 cut-off events. [2022-11-20 12:14:47,921 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-11-20 12:14:47,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 659 conditions, 542 events. 24/542 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2014 event pairs, 6 based on Foata normal form. 0/514 useless extension candidates. Maximal degree in co-relation 652. Up to 56 conditions per place. [2022-11-20 12:14:47,926 INFO L137 encePairwiseOnDemand]: 226/229 looper letters, 17 selfloop transitions, 2 changer transitions 0/197 dead transitions. [2022-11-20 12:14:47,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 197 transitions, 476 flow [2022-11-20 12:14:47,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:14:47,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 12:14:47,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 554 transitions. [2022-11-20 12:14:47,928 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8064046579330422 [2022-11-20 12:14:47,928 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 554 transitions. [2022-11-20 12:14:47,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 554 transitions. [2022-11-20 12:14:47,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:14:47,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 554 transitions. [2022-11-20 12:14:47,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 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 12:14:47,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 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 12:14:47,932 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 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 12:14:47,933 INFO L175 Difference]: Start difference. First operand has 195 places, 193 transitions, 430 flow. Second operand 3 states and 554 transitions. [2022-11-20 12:14:47,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 197 transitions, 476 flow [2022-11-20 12:14:47,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 197 transitions, 476 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:14:47,939 INFO L231 Difference]: Finished difference. Result has 198 places, 194 transitions, 442 flow [2022-11-20 12:14:47,939 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=442, PETRI_PLACES=198, PETRI_TRANSITIONS=194} [2022-11-20 12:14:47,943 INFO L288 CegarLoopForPetriNet]: 195 programPoint places, 3 predicate places. [2022-11-20 12:14:47,943 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 194 transitions, 442 flow [2022-11-20 12:14:47,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 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 12:14:47,944 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:47,944 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] [2022-11-20 12:14:47,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 12:14:47,944 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:14:47,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:47,945 INFO L85 PathProgramCache]: Analyzing trace with hash 956024503, now seen corresponding path program 1 times [2022-11-20 12:14:47,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:47,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048822273] [2022-11-20 12:14:47,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:47,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:47,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:48,097 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 12:14:48,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:48,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048822273] [2022-11-20 12:14:48,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048822273] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:14:48,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944250332] [2022-11-20 12:14:48,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:48,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:48,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:14:48,103 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:14:48,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 12:14:48,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:48,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 12:14:48,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:14:48,317 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 12:14:48,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:14:48,368 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 12:14:48,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944250332] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:14:48,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:14:48,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 12:14:48,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318262774] [2022-11-20 12:14:48,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:14:48,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 12:14:48,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:48,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 12:14:48,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:14:48,373 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 229 [2022-11-20 12:14:48,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 194 transitions, 442 flow. Second operand has 10 states, 10 states have (on average 179.3) internal successors, (1793), 10 states have internal predecessors, (1793), 0 states have call successors, (0), 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 12:14:48,376 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:14:48,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 229 [2022-11-20 12:14:48,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:14:48,603 INFO L130 PetriNetUnfolder]: 22/476 cut-off events. [2022-11-20 12:14:48,604 INFO L131 PetriNetUnfolder]: For 115/115 co-relation queries the response was YES. [2022-11-20 12:14:48,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 605 conditions, 476 events. 22/476 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1582 event pairs, 10 based on Foata normal form. 2/456 useless extension candidates. Maximal degree in co-relation 596. Up to 40 conditions per place. [2022-11-20 12:14:48,610 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 18 selfloop transitions, 9 changer transitions 0/204 dead transitions. [2022-11-20 12:14:48,610 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 204 transitions, 518 flow [2022-11-20 12:14:48,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:14:48,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 12:14:48,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1622 transitions. [2022-11-20 12:14:48,615 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7869966035904901 [2022-11-20 12:14:48,615 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1622 transitions. [2022-11-20 12:14:48,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1622 transitions. [2022-11-20 12:14:48,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:14:48,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1622 transitions. [2022-11-20 12:14:48,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 180.22222222222223) internal successors, (1622), 9 states have internal predecessors, (1622), 0 states have call successors, (0), 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 12:14:48,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 229.0) internal successors, (2290), 10 states have internal predecessors, (2290), 0 states have call successors, (0), 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 12:14:48,626 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 229.0) internal successors, (2290), 10 states have internal predecessors, (2290), 0 states have call successors, (0), 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 12:14:48,627 INFO L175 Difference]: Start difference. First operand has 198 places, 194 transitions, 442 flow. Second operand 9 states and 1622 transitions. [2022-11-20 12:14:48,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 204 transitions, 518 flow [2022-11-20 12:14:48,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 204 transitions, 516 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 12:14:48,633 INFO L231 Difference]: Finished difference. Result has 208 places, 200 transitions, 490 flow [2022-11-20 12:14:48,633 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=490, PETRI_PLACES=208, PETRI_TRANSITIONS=200} [2022-11-20 12:14:48,634 INFO L288 CegarLoopForPetriNet]: 195 programPoint places, 13 predicate places. [2022-11-20 12:14:48,634 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 200 transitions, 490 flow [2022-11-20 12:14:48,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 179.3) internal successors, (1793), 10 states have internal predecessors, (1793), 0 states have call successors, (0), 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 12:14:48,635 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:48,636 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:48,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 12:14:48,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 12:14:48,842 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:14:48,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:48,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1196007636, now seen corresponding path program 1 times [2022-11-20 12:14:48,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:48,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698091034] [2022-11-20 12:14:48,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:48,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:48,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:14:48,873 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 12:14:48,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:14:48,918 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 12:14:48,923 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 12:14:48,923 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 12:14:48,924 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 12:14:48,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 12:14:48,924 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-20 12:14:48,925 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 12:14:48,925 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-20 12:14:48,975 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-11-20 12:14:48,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 262 transitions, 584 flow [2022-11-20 12:14:49,234 INFO L130 PetriNetUnfolder]: 181/1027 cut-off events. [2022-11-20 12:14:49,234 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-11-20 12:14:49,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1138 conditions, 1027 events. 181/1027 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4847 event pairs, 23 based on Foata normal form. 0/856 useless extension candidates. Maximal degree in co-relation 715. Up to 80 conditions per place. [2022-11-20 12:14:49,247 INFO L82 GeneralOperation]: Start removeDead. Operand has 222 places, 262 transitions, 584 flow [2022-11-20 12:14:49,263 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 222 places, 262 transitions, 584 flow [2022-11-20 12:14:49,265 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:14:49,266 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;@50917d7f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:14:49,266 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 12:14:49,275 INFO L130 PetriNetUnfolder]: 10/103 cut-off events. [2022-11-20 12:14:49,275 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 12:14:49,276 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:49,276 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] [2022-11-20 12:14:49,276 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:14:49,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:49,277 INFO L85 PathProgramCache]: Analyzing trace with hash -410899633, now seen corresponding path program 1 times [2022-11-20 12:14:49,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:49,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846694646] [2022-11-20 12:14:49,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:49,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:49,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:49,318 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 12:14:49,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:49,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846694646] [2022-11-20 12:14:49,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846694646] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:14:49,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:14:49,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:14:49,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804894149] [2022-11-20 12:14:49,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:14:49,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 12:14:49,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:49,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 12:14:49,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 12:14:49,339 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 262 [2022-11-20 12:14:49,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 262 transitions, 584 flow. Second operand has 2 states, 2 states have (on average 211.0) internal successors, (422), 2 states have internal predecessors, (422), 0 states have call successors, (0), 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 12:14:49,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:14:49,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 262 [2022-11-20 12:14:49,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:14:49,642 INFO L130 PetriNetUnfolder]: 59/899 cut-off events. [2022-11-20 12:14:49,642 INFO L131 PetriNetUnfolder]: For 285/285 co-relation queries the response was YES. [2022-11-20 12:14:49,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1096 conditions, 899 events. 59/899 cut-off events. For 285/285 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4137 event pairs, 23 based on Foata normal form. 613/1463 useless extension candidates. Maximal degree in co-relation 656. Up to 86 conditions per place. [2022-11-20 12:14:49,654 INFO L137 encePairwiseOnDemand]: 221/262 looper letters, 10 selfloop transitions, 0 changer transitions 0/220 dead transitions. [2022-11-20 12:14:49,655 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 220 transitions, 520 flow [2022-11-20 12:14:49,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 12:14:49,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 12:14:49,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 471 transitions. [2022-11-20 12:14:49,657 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.898854961832061 [2022-11-20 12:14:49,657 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 471 transitions. [2022-11-20 12:14:49,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 471 transitions. [2022-11-20 12:14:49,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:14:49,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 471 transitions. [2022-11-20 12:14:49,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 235.5) internal successors, (471), 2 states have internal predecessors, (471), 0 states have call successors, (0), 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 12:14:49,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 262.0) internal successors, (786), 3 states have internal predecessors, (786), 0 states have call successors, (0), 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 12:14:49,662 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 262.0) internal successors, (786), 3 states have internal predecessors, (786), 0 states have call successors, (0), 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 12:14:49,662 INFO L175 Difference]: Start difference. First operand has 222 places, 262 transitions, 584 flow. Second operand 2 states and 471 transitions. [2022-11-20 12:14:49,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 220 transitions, 520 flow [2022-11-20 12:14:49,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 220 transitions, 520 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:14:49,675 INFO L231 Difference]: Finished difference. Result has 222 places, 220 transitions, 500 flow [2022-11-20 12:14:49,676 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=500, PETRI_PLACES=222, PETRI_TRANSITIONS=220} [2022-11-20 12:14:49,678 INFO L288 CegarLoopForPetriNet]: 222 programPoint places, 0 predicate places. [2022-11-20 12:14:49,678 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 220 transitions, 500 flow [2022-11-20 12:14:49,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 211.0) internal successors, (422), 2 states have internal predecessors, (422), 0 states have call successors, (0), 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 12:14:49,679 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:49,679 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] [2022-11-20 12:14:49,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 12:14:49,680 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:14:49,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:49,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1352321322, now seen corresponding path program 1 times [2022-11-20 12:14:49,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:49,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080484125] [2022-11-20 12:14:49,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:49,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:49,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:49,762 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 12:14:49,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:49,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080484125] [2022-11-20 12:14:49,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080484125] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:14:49,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:14:49,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:14:49,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023953451] [2022-11-20 12:14:49,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:14:49,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:14:49,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:49,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:14:49,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:14:49,766 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 262 [2022-11-20 12:14:49,767 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 220 transitions, 500 flow. Second operand has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 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 12:14:49,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:14:49,767 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 262 [2022-11-20 12:14:49,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:14:50,075 INFO L130 PetriNetUnfolder]: 58/866 cut-off events. [2022-11-20 12:14:50,075 INFO L131 PetriNetUnfolder]: For 270/270 co-relation queries the response was YES. [2022-11-20 12:14:50,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 866 events. 58/866 cut-off events. For 270/270 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3976 event pairs, 23 based on Foata normal form. 0/819 useless extension candidates. Maximal degree in co-relation 1085. Up to 110 conditions per place. [2022-11-20 12:14:50,087 INFO L137 encePairwiseOnDemand]: 259/262 looper letters, 19 selfloop transitions, 2 changer transitions 0/224 dead transitions. [2022-11-20 12:14:50,087 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 224 transitions, 550 flow [2022-11-20 12:14:50,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:14:50,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 12:14:50,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 631 transitions. [2022-11-20 12:14:50,090 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8027989821882952 [2022-11-20 12:14:50,091 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 631 transitions. [2022-11-20 12:14:50,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 631 transitions. [2022-11-20 12:14:50,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:14:50,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 631 transitions. [2022-11-20 12:14:50,094 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 12:14:50,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 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 12:14:50,096 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 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 12:14:50,097 INFO L175 Difference]: Start difference. First operand has 222 places, 220 transitions, 500 flow. Second operand 3 states and 631 transitions. [2022-11-20 12:14:50,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 224 transitions, 550 flow [2022-11-20 12:14:50,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 224 transitions, 550 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:14:50,103 INFO L231 Difference]: Finished difference. Result has 225 places, 221 transitions, 512 flow [2022-11-20 12:14:50,104 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=512, PETRI_PLACES=225, PETRI_TRANSITIONS=221} [2022-11-20 12:14:50,105 INFO L288 CegarLoopForPetriNet]: 222 programPoint places, 3 predicate places. [2022-11-20 12:14:50,105 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 221 transitions, 512 flow [2022-11-20 12:14:50,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 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 12:14:50,106 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:50,106 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] [2022-11-20 12:14:50,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 12:14:50,107 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:14:50,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:50,107 INFO L85 PathProgramCache]: Analyzing trace with hash -752041066, now seen corresponding path program 1 times [2022-11-20 12:14:50,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:50,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282077229] [2022-11-20 12:14:50,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:50,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:50,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:50,221 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 12:14:50,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:50,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282077229] [2022-11-20 12:14:50,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282077229] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:14:50,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756619751] [2022-11-20 12:14:50,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:50,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:50,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:14:50,224 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:14:50,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 12:14:50,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:50,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 12:14:50,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:14:50,424 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 12:14:50,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:14:50,480 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 12:14:50,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756619751] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:14:50,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:14:50,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 12:14:50,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80559413] [2022-11-20 12:14:50,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:14:50,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 12:14:50,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:50,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 12:14:50,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:14:50,490 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 262 [2022-11-20 12:14:50,493 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 221 transitions, 512 flow. Second operand has 10 states, 10 states have (on average 204.3) internal successors, (2043), 10 states have internal predecessors, (2043), 0 states have call successors, (0), 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 12:14:50,493 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:14:50,493 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 262 [2022-11-20 12:14:50,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:14:50,826 INFO L130 PetriNetUnfolder]: 56/800 cut-off events. [2022-11-20 12:14:50,826 INFO L131 PetriNetUnfolder]: For 273/273 co-relation queries the response was YES. [2022-11-20 12:14:50,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1042 conditions, 800 events. 56/800 cut-off events. For 273/273 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3545 event pairs, 27 based on Foata normal form. 2/762 useless extension candidates. Maximal degree in co-relation 1032. Up to 91 conditions per place. [2022-11-20 12:14:50,840 INFO L137 encePairwiseOnDemand]: 256/262 looper letters, 20 selfloop transitions, 9 changer transitions 0/231 dead transitions. [2022-11-20 12:14:50,840 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 231 transitions, 592 flow [2022-11-20 12:14:50,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:14:50,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 12:14:50,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1849 transitions. [2022-11-20 12:14:50,846 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7841391009329941 [2022-11-20 12:14:50,846 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1849 transitions. [2022-11-20 12:14:50,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1849 transitions. [2022-11-20 12:14:50,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:14:50,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1849 transitions. [2022-11-20 12:14:50,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 205.44444444444446) internal successors, (1849), 9 states have internal predecessors, (1849), 0 states have call successors, (0), 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 12:14:50,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 262.0) internal successors, (2620), 10 states have internal predecessors, (2620), 0 states have call successors, (0), 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 12:14:50,859 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 262.0) internal successors, (2620), 10 states have internal predecessors, (2620), 0 states have call successors, (0), 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 12:14:50,859 INFO L175 Difference]: Start difference. First operand has 225 places, 221 transitions, 512 flow. Second operand 9 states and 1849 transitions. [2022-11-20 12:14:50,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 231 transitions, 592 flow [2022-11-20 12:14:50,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 231 transitions, 590 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 12:14:50,866 INFO L231 Difference]: Finished difference. Result has 235 places, 227 transitions, 560 flow [2022-11-20 12:14:50,867 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=560, PETRI_PLACES=235, PETRI_TRANSITIONS=227} [2022-11-20 12:14:50,868 INFO L288 CegarLoopForPetriNet]: 222 programPoint places, 13 predicate places. [2022-11-20 12:14:50,868 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 227 transitions, 560 flow [2022-11-20 12:14:50,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 204.3) internal successors, (2043), 10 states have internal predecessors, (2043), 0 states have call successors, (0), 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 12:14:50,869 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:50,870 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:14:50,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 12:14:51,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:51,077 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:14:51,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:51,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1501799583, now seen corresponding path program 1 times [2022-11-20 12:14:51,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:51,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384706888] [2022-11-20 12:14:51,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:51,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:51,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:14:51,102 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 12:14:51,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:14:51,141 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 12:14:51,142 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 12:14:51,142 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 12:14:51,142 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 12:14:51,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 12:14:51,143 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-20 12:14:51,143 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 12:14:51,143 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-11-20 12:14:51,189 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-11-20 12:14:51,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 249 places, 295 transitions, 668 flow [2022-11-20 12:14:51,580 INFO L130 PetriNetUnfolder]: 311/1672 cut-off events. [2022-11-20 12:14:51,580 INFO L131 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2022-11-20 12:14:51,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1904 conditions, 1672 events. 311/1672 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 9401 event pairs, 72 based on Foata normal form. 0/1418 useless extension candidates. Maximal degree in co-relation 1126. Up to 192 conditions per place. [2022-11-20 12:14:51,607 INFO L82 GeneralOperation]: Start removeDead. Operand has 249 places, 295 transitions, 668 flow [2022-11-20 12:14:51,629 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 249 places, 295 transitions, 668 flow [2022-11-20 12:14:51,630 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:14:51,630 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;@50917d7f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:14:51,631 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 12:14:51,639 INFO L130 PetriNetUnfolder]: 10/103 cut-off events. [2022-11-20 12:14:51,639 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 12:14:51,640 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:51,640 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] [2022-11-20 12:14:51,640 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:14:51,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:51,641 INFO L85 PathProgramCache]: Analyzing trace with hash 93326070, now seen corresponding path program 1 times [2022-11-20 12:14:51,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:51,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006347156] [2022-11-20 12:14:51,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:51,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:51,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:51,679 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 12:14:51,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:51,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006347156] [2022-11-20 12:14:51,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006347156] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:14:51,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:14:51,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:14:51,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704366449] [2022-11-20 12:14:51,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:14:51,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 12:14:51,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:51,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 12:14:51,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 12:14:51,683 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 295 [2022-11-20 12:14:51,684 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 295 transitions, 668 flow. Second operand has 2 states, 2 states have (on average 236.0) internal successors, (472), 2 states have internal predecessors, (472), 0 states have call successors, (0), 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 12:14:51,684 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:14:51,684 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 295 [2022-11-20 12:14:51,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:14:52,118 INFO L130 PetriNetUnfolder]: 141/1495 cut-off events. [2022-11-20 12:14:52,119 INFO L131 PetriNetUnfolder]: For 647/647 co-relation queries the response was YES. [2022-11-20 12:14:52,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1926 conditions, 1495 events. 141/1495 cut-off events. For 647/647 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 8494 event pairs, 72 based on Foata normal form. 1352/2763 useless extension candidates. Maximal degree in co-relation 1083. Up to 199 conditions per place. [2022-11-20 12:14:52,147 INFO L137 encePairwiseOnDemand]: 248/295 looper letters, 12 selfloop transitions, 0 changer transitions 0/247 dead transitions. [2022-11-20 12:14:52,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 247 transitions, 596 flow [2022-11-20 12:14:52,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 12:14:52,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 12:14:52,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 529 transitions. [2022-11-20 12:14:52,150 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8966101694915254 [2022-11-20 12:14:52,150 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 529 transitions. [2022-11-20 12:14:52,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 529 transitions. [2022-11-20 12:14:52,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:14:52,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 529 transitions. [2022-11-20 12:14:52,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 264.5) internal successors, (529), 2 states have internal predecessors, (529), 0 states have call successors, (0), 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 12:14:52,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 295.0) internal successors, (885), 3 states have internal predecessors, (885), 0 states have call successors, (0), 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 12:14:52,154 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 295.0) internal successors, (885), 3 states have internal predecessors, (885), 0 states have call successors, (0), 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 12:14:52,155 INFO L175 Difference]: Start difference. First operand has 249 places, 295 transitions, 668 flow. Second operand 2 states and 529 transitions. [2022-11-20 12:14:52,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 247 transitions, 596 flow [2022-11-20 12:14:52,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 247 transitions, 596 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:14:52,160 INFO L231 Difference]: Finished difference. Result has 249 places, 247 transitions, 572 flow [2022-11-20 12:14:52,161 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=572, PETRI_PLACES=249, PETRI_TRANSITIONS=247} [2022-11-20 12:14:52,162 INFO L288 CegarLoopForPetriNet]: 249 programPoint places, 0 predicate places. [2022-11-20 12:14:52,162 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 247 transitions, 572 flow [2022-11-20 12:14:52,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 236.0) internal successors, (472), 2 states have internal predecessors, (472), 0 states have call successors, (0), 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 12:14:52,162 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:52,163 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] [2022-11-20 12:14:52,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 12:14:52,163 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:14:52,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:52,164 INFO L85 PathProgramCache]: Analyzing trace with hash 393552298, now seen corresponding path program 1 times [2022-11-20 12:14:52,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:52,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279205094] [2022-11-20 12:14:52,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:52,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:52,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:52,226 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 12:14:52,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:52,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279205094] [2022-11-20 12:14:52,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279205094] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:14:52,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:14:52,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:14:52,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665885191] [2022-11-20 12:14:52,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:14:52,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:14:52,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:52,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:14:52,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:14:52,230 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 295 [2022-11-20 12:14:52,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 247 transitions, 572 flow. Second operand has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 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 12:14:52,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:14:52,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 295 [2022-11-20 12:14:52,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:14:52,660 INFO L130 PetriNetUnfolder]: 140/1462 cut-off events. [2022-11-20 12:14:52,660 INFO L131 PetriNetUnfolder]: For 626/626 co-relation queries the response was YES. [2022-11-20 12:14:52,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1928 conditions, 1462 events. 140/1462 cut-off events. For 626/626 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 8321 event pairs, 72 based on Foata normal form. 0/1380 useless extension candidates. Maximal degree in co-relation 1919. Up to 228 conditions per place. [2022-11-20 12:14:52,728 INFO L137 encePairwiseOnDemand]: 292/295 looper letters, 21 selfloop transitions, 2 changer transitions 0/251 dead transitions. [2022-11-20 12:14:52,728 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 251 transitions, 626 flow [2022-11-20 12:14:52,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:14:52,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 12:14:52,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 708 transitions. [2022-11-20 12:14:52,731 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8 [2022-11-20 12:14:52,731 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 708 transitions. [2022-11-20 12:14:52,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 708 transitions. [2022-11-20 12:14:52,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:14:52,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 708 transitions. [2022-11-20 12:14:52,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 0 states have call successors, (0), 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 12:14:52,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 0 states have call successors, (0), 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 12:14:52,736 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 0 states have call successors, (0), 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 12:14:52,736 INFO L175 Difference]: Start difference. First operand has 249 places, 247 transitions, 572 flow. Second operand 3 states and 708 transitions. [2022-11-20 12:14:52,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 251 transitions, 626 flow [2022-11-20 12:14:52,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 251 transitions, 626 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:14:52,742 INFO L231 Difference]: Finished difference. Result has 252 places, 248 transitions, 584 flow [2022-11-20 12:14:52,743 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=584, PETRI_PLACES=252, PETRI_TRANSITIONS=248} [2022-11-20 12:14:52,743 INFO L288 CegarLoopForPetriNet]: 249 programPoint places, 3 predicate places. [2022-11-20 12:14:52,743 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 248 transitions, 584 flow [2022-11-20 12:14:52,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 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 12:14:52,744 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:52,744 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] [2022-11-20 12:14:52,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 12:14:52,745 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:14:52,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:52,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1411004267, now seen corresponding path program 1 times [2022-11-20 12:14:52,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:52,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530547434] [2022-11-20 12:14:52,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:52,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:52,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:52,828 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 12:14:52,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:52,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530547434] [2022-11-20 12:14:52,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530547434] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:14:52,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124504671] [2022-11-20 12:14:52,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:52,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:52,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:14:52,830 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:14:52,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 12:14:52,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:52,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 12:14:52,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:14:53,014 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 12:14:53,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:14:53,056 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 12:14:53,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124504671] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:14:53,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:14:53,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 12:14:53,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20336373] [2022-11-20 12:14:53,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:14:53,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 12:14:53,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:53,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 12:14:53,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:14:53,061 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 295 [2022-11-20 12:14:53,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 248 transitions, 584 flow. Second operand has 10 states, 10 states have (on average 229.3) internal successors, (2293), 10 states have internal predecessors, (2293), 0 states have call successors, (0), 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 12:14:53,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:14:53,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 295 [2022-11-20 12:14:53,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:14:53,599 INFO L130 PetriNetUnfolder]: 138/1396 cut-off events. [2022-11-20 12:14:53,600 INFO L131 PetriNetUnfolder]: For 629/629 co-relation queries the response was YES. [2022-11-20 12:14:53,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1880 conditions, 1396 events. 138/1396 cut-off events. For 629/629 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 7877 event pairs, 76 based on Foata normal form. 2/1324 useless extension candidates. Maximal degree in co-relation 1869. Up to 206 conditions per place. [2022-11-20 12:14:53,625 INFO L137 encePairwiseOnDemand]: 289/295 looper letters, 22 selfloop transitions, 9 changer transitions 0/258 dead transitions. [2022-11-20 12:14:53,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 258 transitions, 668 flow [2022-11-20 12:14:53,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:14:53,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 12:14:53,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2076 transitions. [2022-11-20 12:14:53,631 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7819209039548023 [2022-11-20 12:14:53,631 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2076 transitions. [2022-11-20 12:14:53,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2076 transitions. [2022-11-20 12:14:53,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:14:53,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2076 transitions. [2022-11-20 12:14:53,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 230.66666666666666) internal successors, (2076), 9 states have internal predecessors, (2076), 0 states have call successors, (0), 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 12:14:53,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 295.0) internal successors, (2950), 10 states have internal predecessors, (2950), 0 states have call successors, (0), 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 12:14:53,645 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 295.0) internal successors, (2950), 10 states have internal predecessors, (2950), 0 states have call successors, (0), 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 12:14:53,645 INFO L175 Difference]: Start difference. First operand has 252 places, 248 transitions, 584 flow. Second operand 9 states and 2076 transitions. [2022-11-20 12:14:53,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 258 transitions, 668 flow [2022-11-20 12:14:53,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 258 transitions, 666 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 12:14:53,651 INFO L231 Difference]: Finished difference. Result has 262 places, 254 transitions, 632 flow [2022-11-20 12:14:53,652 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=632, PETRI_PLACES=262, PETRI_TRANSITIONS=254} [2022-11-20 12:14:53,653 INFO L288 CegarLoopForPetriNet]: 249 programPoint places, 13 predicate places. [2022-11-20 12:14:53,653 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 254 transitions, 632 flow [2022-11-20 12:14:53,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 229.3) internal successors, (2293), 10 states have internal predecessors, (2293), 0 states have call successors, (0), 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 12:14:53,654 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:53,655 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:53,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 12:14:53,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 12:14:53,861 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:14:53,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:53,861 INFO L85 PathProgramCache]: Analyzing trace with hash 187363310, now seen corresponding path program 1 times [2022-11-20 12:14:53,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:53,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455382734] [2022-11-20 12:14:53,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:53,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:53,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:54,050 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:14:54,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:54,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455382734] [2022-11-20 12:14:54,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455382734] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:14:54,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935062382] [2022-11-20 12:14:54,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:54,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:54,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:14:54,052 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:14:54,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 12:14:54,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:54,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 12:14:54,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:14:54,299 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:14:54,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:14:54,461 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:14:54,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935062382] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:14:54,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:14:54,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 12:14:54,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708719989] [2022-11-20 12:14:54,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:14:54,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 12:14:54,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:54,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 12:14:54,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 12:14:54,467 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 295 [2022-11-20 12:14:54,472 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 254 transitions, 632 flow. Second operand has 18 states, 18 states have (on average 229.61111111111111) internal successors, (4133), 18 states have internal predecessors, (4133), 0 states have call successors, (0), 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 12:14:54,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:14:54,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 295 [2022-11-20 12:14:54,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:14:54,801 INFO L130 PetriNetUnfolder]: 6/244 cut-off events. [2022-11-20 12:14:54,801 INFO L131 PetriNetUnfolder]: For 75/75 co-relation queries the response was YES. [2022-11-20 12:14:54,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373 conditions, 244 events. 6/244 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 464 event pairs, 0 based on Foata normal form. 4/242 useless extension candidates. Maximal degree in co-relation 360. Up to 9 conditions per place. [2022-11-20 12:14:54,804 INFO L137 encePairwiseOnDemand]: 290/295 looper letters, 21 selfloop transitions, 19 changer transitions 0/222 dead transitions. [2022-11-20 12:14:54,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 222 transitions, 670 flow [2022-11-20 12:14:54,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 12:14:54,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 12:14:54,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4811 transitions. [2022-11-20 12:14:54,816 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7765940274414851 [2022-11-20 12:14:54,817 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4811 transitions. [2022-11-20 12:14:54,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4811 transitions. [2022-11-20 12:14:54,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:14:54,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4811 transitions. [2022-11-20 12:14:54,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 229.0952380952381) internal successors, (4811), 21 states have internal predecessors, (4811), 0 states have call successors, (0), 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 12:14:54,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 295.0) internal successors, (6490), 22 states have internal predecessors, (6490), 0 states have call successors, (0), 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 12:14:54,853 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 295.0) internal successors, (6490), 22 states have internal predecessors, (6490), 0 states have call successors, (0), 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 12:14:54,853 INFO L175 Difference]: Start difference. First operand has 262 places, 254 transitions, 632 flow. Second operand 21 states and 4811 transitions. [2022-11-20 12:14:54,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 222 transitions, 670 flow [2022-11-20 12:14:54,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 222 transitions, 615 flow, removed 20 selfloop flow, removed 4 redundant places. [2022-11-20 12:14:54,860 INFO L231 Difference]: Finished difference. Result has 232 places, 211 transitions, 538 flow [2022-11-20 12:14:54,860 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=538, PETRI_PLACES=232, PETRI_TRANSITIONS=211} [2022-11-20 12:14:54,861 INFO L288 CegarLoopForPetriNet]: 249 programPoint places, -17 predicate places. [2022-11-20 12:14:54,861 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 211 transitions, 538 flow [2022-11-20 12:14:54,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 229.61111111111111) internal successors, (4133), 18 states have internal predecessors, (4133), 0 states have call successors, (0), 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 12:14:54,863 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:54,863 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:14:54,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 12:14:55,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:55,070 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:14:55,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:55,071 INFO L85 PathProgramCache]: Analyzing trace with hash -661165431, now seen corresponding path program 1 times [2022-11-20 12:14:55,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:55,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356510958] [2022-11-20 12:14:55,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:55,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:55,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:14:55,112 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 12:14:55,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:14:55,159 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 12:14:55,160 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 12:14:55,160 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 12:14:55,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 12:14:55,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-20 12:14:55,162 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-20 12:14:55,164 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 12:14:55,164 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-11-20 12:14:55,209 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2022-11-20 12:14:55,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 328 transitions, 754 flow [2022-11-20 12:14:56,009 INFO L130 PetriNetUnfolder]: 585/2909 cut-off events. [2022-11-20 12:14:56,010 INFO L131 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2022-11-20 12:14:56,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3407 conditions, 2909 events. 585/2909 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 19578 event pairs, 201 based on Foata normal form. 0/2508 useless extension candidates. Maximal degree in co-relation 1890. Up to 448 conditions per place. [2022-11-20 12:14:56,056 INFO L82 GeneralOperation]: Start removeDead. Operand has 276 places, 328 transitions, 754 flow [2022-11-20 12:14:56,096 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 276 places, 328 transitions, 754 flow [2022-11-20 12:14:56,097 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:14:56,098 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;@50917d7f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:14:56,098 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 12:14:56,106 INFO L130 PetriNetUnfolder]: 10/103 cut-off events. [2022-11-20 12:14:56,106 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 12:14:56,106 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:56,106 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] [2022-11-20 12:14:56,107 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:14:56,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:56,107 INFO L85 PathProgramCache]: Analyzing trace with hash 304535614, now seen corresponding path program 1 times [2022-11-20 12:14:56,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:56,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182059114] [2022-11-20 12:14:56,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:56,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:56,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:56,129 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 12:14:56,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:56,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182059114] [2022-11-20 12:14:56,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182059114] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:14:56,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:14:56,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:14:56,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496713257] [2022-11-20 12:14:56,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:14:56,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 12:14:56,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:56,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 12:14:56,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 12:14:56,132 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 328 [2022-11-20 12:14:56,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 328 transitions, 754 flow. Second operand has 2 states, 2 states have (on average 261.0) internal successors, (522), 2 states have internal predecessors, (522), 0 states have call successors, (0), 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 12:14:56,133 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:14:56,133 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 328 [2022-11-20 12:14:56,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:14:57,114 INFO L130 PetriNetUnfolder]: 335/2651 cut-off events. [2022-11-20 12:14:57,114 INFO L131 PetriNetUnfolder]: For 1449/1449 co-relation queries the response was YES. [2022-11-20 12:14:57,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3605 conditions, 2651 events. 335/2651 cut-off events. For 1449/1449 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 18370 event pairs, 201 based on Foata normal form. 2993/5493 useless extension candidates. Maximal degree in co-relation 1911. Up to 456 conditions per place. [2022-11-20 12:14:57,171 INFO L137 encePairwiseOnDemand]: 275/328 looper letters, 14 selfloop transitions, 0 changer transitions 0/274 dead transitions. [2022-11-20 12:14:57,171 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 274 transitions, 674 flow [2022-11-20 12:14:57,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 12:14:57,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 12:14:57,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 587 transitions. [2022-11-20 12:14:57,174 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8948170731707317 [2022-11-20 12:14:57,174 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 587 transitions. [2022-11-20 12:14:57,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 587 transitions. [2022-11-20 12:14:57,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:14:57,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 587 transitions. [2022-11-20 12:14:57,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 293.5) internal successors, (587), 2 states have internal predecessors, (587), 0 states have call successors, (0), 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 12:14:57,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 328.0) internal successors, (984), 3 states have internal predecessors, (984), 0 states have call successors, (0), 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 12:14:57,180 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 328.0) internal successors, (984), 3 states have internal predecessors, (984), 0 states have call successors, (0), 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 12:14:57,180 INFO L175 Difference]: Start difference. First operand has 276 places, 328 transitions, 754 flow. Second operand 2 states and 587 transitions. [2022-11-20 12:14:57,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 274 transitions, 674 flow [2022-11-20 12:14:57,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 274 transitions, 674 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:14:57,188 INFO L231 Difference]: Finished difference. Result has 276 places, 274 transitions, 646 flow [2022-11-20 12:14:57,189 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=646, PETRI_PLACES=276, PETRI_TRANSITIONS=274} [2022-11-20 12:14:57,190 INFO L288 CegarLoopForPetriNet]: 276 programPoint places, 0 predicate places. [2022-11-20 12:14:57,190 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 274 transitions, 646 flow [2022-11-20 12:14:57,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 261.0) internal successors, (522), 2 states have internal predecessors, (522), 0 states have call successors, (0), 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 12:14:57,191 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:57,191 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] [2022-11-20 12:14:57,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-20 12:14:57,191 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:14:57,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:57,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1589699158, now seen corresponding path program 1 times [2022-11-20 12:14:57,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:57,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321687643] [2022-11-20 12:14:57,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:57,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:57,260 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 12:14:57,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:57,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321687643] [2022-11-20 12:14:57,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321687643] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:14:57,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:14:57,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:14:57,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720475093] [2022-11-20 12:14:57,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:14:57,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:14:57,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:57,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:14:57,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:14:57,266 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 328 [2022-11-20 12:14:57,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 274 transitions, 646 flow. Second operand has 3 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 0 states have call successors, (0), 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 12:14:57,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:14:57,268 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 328 [2022-11-20 12:14:57,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:14:58,230 INFO L130 PetriNetUnfolder]: 334/2618 cut-off events. [2022-11-20 12:14:58,231 INFO L131 PetriNetUnfolder]: For 1421/1421 co-relation queries the response was YES. [2022-11-20 12:14:58,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3612 conditions, 2618 events. 334/2618 cut-off events. For 1421/1421 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 18127 event pairs, 201 based on Foata normal form. 0/2469 useless extension candidates. Maximal degree in co-relation 3602. Up to 490 conditions per place. [2022-11-20 12:14:58,286 INFO L137 encePairwiseOnDemand]: 325/328 looper letters, 23 selfloop transitions, 2 changer transitions 0/278 dead transitions. [2022-11-20 12:14:58,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 278 transitions, 704 flow [2022-11-20 12:14:58,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:14:58,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 12:14:58,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 785 transitions. [2022-11-20 12:14:58,289 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7977642276422764 [2022-11-20 12:14:58,290 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 785 transitions. [2022-11-20 12:14:58,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 785 transitions. [2022-11-20 12:14:58,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:14:58,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 785 transitions. [2022-11-20 12:14:58,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 261.6666666666667) internal successors, (785), 3 states have internal predecessors, (785), 0 states have call successors, (0), 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 12:14:58,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 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 12:14:58,295 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 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 12:14:58,295 INFO L175 Difference]: Start difference. First operand has 276 places, 274 transitions, 646 flow. Second operand 3 states and 785 transitions. [2022-11-20 12:14:58,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 278 transitions, 704 flow [2022-11-20 12:14:58,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 278 transitions, 704 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:14:58,301 INFO L231 Difference]: Finished difference. Result has 279 places, 275 transitions, 658 flow [2022-11-20 12:14:58,302 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=658, PETRI_PLACES=279, PETRI_TRANSITIONS=275} [2022-11-20 12:14:58,302 INFO L288 CegarLoopForPetriNet]: 276 programPoint places, 3 predicate places. [2022-11-20 12:14:58,303 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 275 transitions, 658 flow [2022-11-20 12:14:58,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 0 states have call successors, (0), 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 12:14:58,303 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:58,303 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] [2022-11-20 12:14:58,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-20 12:14:58,304 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:14:58,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:58,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1020865100, now seen corresponding path program 1 times [2022-11-20 12:14:58,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:58,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279631043] [2022-11-20 12:14:58,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:58,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:58,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:58,411 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 12:14:58,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:58,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279631043] [2022-11-20 12:14:58,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279631043] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:14:58,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142806747] [2022-11-20 12:14:58,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:58,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:58,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:14:58,414 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:14:58,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 12:14:58,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:58,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 12:14:58,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:14:58,628 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 12:14:58,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:14:58,670 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 12:14:58,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142806747] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:14:58,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:14:58,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 12:14:58,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422481066] [2022-11-20 12:14:58,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:14:58,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 12:14:58,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:58,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 12:14:58,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:14:58,677 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 328 [2022-11-20 12:14:58,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 275 transitions, 658 flow. Second operand has 10 states, 10 states have (on average 254.3) internal successors, (2543), 10 states have internal predecessors, (2543), 0 states have call successors, (0), 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 12:14:58,680 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:14:58,680 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 328 [2022-11-20 12:14:58,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:14:59,729 INFO L130 PetriNetUnfolder]: 332/2552 cut-off events. [2022-11-20 12:14:59,730 INFO L131 PetriNetUnfolder]: For 1424/1424 co-relation queries the response was YES. [2022-11-20 12:14:59,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3567 conditions, 2552 events. 332/2552 cut-off events. For 1424/1424 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 17818 event pairs, 205 based on Foata normal form. 2/2414 useless extension candidates. Maximal degree in co-relation 3555. Up to 465 conditions per place. [2022-11-20 12:14:59,924 INFO L137 encePairwiseOnDemand]: 322/328 looper letters, 24 selfloop transitions, 9 changer transitions 0/285 dead transitions. [2022-11-20 12:14:59,924 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 285 transitions, 746 flow [2022-11-20 12:14:59,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:14:59,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 12:14:59,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2303 transitions. [2022-11-20 12:14:59,929 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7801490514905149 [2022-11-20 12:14:59,930 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2303 transitions. [2022-11-20 12:14:59,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2303 transitions. [2022-11-20 12:14:59,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:14:59,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2303 transitions. [2022-11-20 12:14:59,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 255.88888888888889) internal successors, (2303), 9 states have internal predecessors, (2303), 0 states have call successors, (0), 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 12:14:59,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 0 states have call successors, (0), 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 12:14:59,945 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 0 states have call successors, (0), 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 12:14:59,945 INFO L175 Difference]: Start difference. First operand has 279 places, 275 transitions, 658 flow. Second operand 9 states and 2303 transitions. [2022-11-20 12:14:59,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 285 transitions, 746 flow [2022-11-20 12:14:59,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 285 transitions, 744 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 12:14:59,951 INFO L231 Difference]: Finished difference. Result has 289 places, 281 transitions, 706 flow [2022-11-20 12:14:59,952 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=706, PETRI_PLACES=289, PETRI_TRANSITIONS=281} [2022-11-20 12:14:59,953 INFO L288 CegarLoopForPetriNet]: 276 programPoint places, 13 predicate places. [2022-11-20 12:14:59,953 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 281 transitions, 706 flow [2022-11-20 12:14:59,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 254.3) internal successors, (2543), 10 states have internal predecessors, (2543), 0 states have call successors, (0), 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 12:14:59,955 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:59,955 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:59,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-20 12:15:00,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-20 12:15:00,161 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:15:00,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:00,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1719812341, now seen corresponding path program 1 times [2022-11-20 12:15:00,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:00,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664281633] [2022-11-20 12:15:00,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:00,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:00,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:00,357 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:15:00,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:15:00,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664281633] [2022-11-20 12:15:00,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664281633] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:15:00,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60723566] [2022-11-20 12:15:00,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:00,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:15:00,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:15:00,360 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:15:00,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 12:15:00,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:00,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 12:15:00,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:15:00,620 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:15:00,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:15:00,784 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:15:00,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60723566] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:15:00,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:15:00,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 12:15:00,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520665003] [2022-11-20 12:15:00,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:15:00,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 12:15:00,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:15:00,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 12:15:00,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 12:15:00,791 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 328 [2022-11-20 12:15:00,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 281 transitions, 706 flow. Second operand has 18 states, 18 states have (on average 254.61111111111111) internal successors, (4583), 18 states have internal predecessors, (4583), 0 states have call successors, (0), 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 12:15:00,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:15:00,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 328 [2022-11-20 12:15:00,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:15:01,750 INFO L130 PetriNetUnfolder]: 328/2420 cut-off events. [2022-11-20 12:15:01,750 INFO L131 PetriNetUnfolder]: For 1451/1451 co-relation queries the response was YES. [2022-11-20 12:15:01,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3472 conditions, 2420 events. 328/2420 cut-off events. For 1451/1451 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 17832 event pairs, 321 based on Foata normal form. 4/2288 useless extension candidates. Maximal degree in co-relation 3458. Up to 453 conditions per place. [2022-11-20 12:15:01,799 INFO L137 encePairwiseOnDemand]: 322/328 looper letters, 32 selfloop transitions, 21 changer transitions 0/305 dead transitions. [2022-11-20 12:15:01,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 305 transitions, 920 flow [2022-11-20 12:15:01,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 12:15:01,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 12:15:01,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5349 transitions. [2022-11-20 12:15:01,812 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7765679442508711 [2022-11-20 12:15:01,813 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5349 transitions. [2022-11-20 12:15:01,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5349 transitions. [2022-11-20 12:15:01,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:15:01,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5349 transitions. [2022-11-20 12:15:01,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 254.71428571428572) internal successors, (5349), 21 states have internal predecessors, (5349), 0 states have call successors, (0), 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 12:15:01,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 328.0) internal successors, (7216), 22 states have internal predecessors, (7216), 0 states have call successors, (0), 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 12:15:01,853 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 328.0) internal successors, (7216), 22 states have internal predecessors, (7216), 0 states have call successors, (0), 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 12:15:01,853 INFO L175 Difference]: Start difference. First operand has 289 places, 281 transitions, 706 flow. Second operand 21 states and 5349 transitions. [2022-11-20 12:15:01,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 305 transitions, 920 flow [2022-11-20 12:15:01,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 305 transitions, 906 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 12:15:01,862 INFO L231 Difference]: Finished difference. Result has 313 places, 294 transitions, 830 flow [2022-11-20 12:15:01,863 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=830, PETRI_PLACES=313, PETRI_TRANSITIONS=294} [2022-11-20 12:15:01,863 INFO L288 CegarLoopForPetriNet]: 276 programPoint places, 37 predicate places. [2022-11-20 12:15:01,864 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 294 transitions, 830 flow [2022-11-20 12:15:01,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 254.61111111111111) internal successors, (4583), 18 states have internal predecessors, (4583), 0 states have call successors, (0), 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 12:15:01,866 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:15:01,866 INFO L209 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:15:01,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 12:15:02,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-20 12:15:02,072 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:15:02,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:02,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1742910734, now seen corresponding path program 1 times [2022-11-20 12:15:02,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:02,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816501400] [2022-11-20 12:15:02,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:02,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:02,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:15:02,100 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 12:15:02,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:15:02,131 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 12:15:02,131 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 12:15:02,131 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 12:15:02,132 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 12:15:02,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-20 12:15:02,132 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-20 12:15:02,133 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 12:15:02,133 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-11-20 12:15:02,172 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-11-20 12:15:02,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 303 places, 361 transitions, 842 flow [2022-11-20 12:15:03,402 INFO L130 PetriNetUnfolder]: 1179/5362 cut-off events. [2022-11-20 12:15:03,402 INFO L131 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2022-11-20 12:15:03,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6447 conditions, 5362 events. 1179/5362 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 42490 event pairs, 522 based on Foata normal form. 0/4686 useless extension candidates. Maximal degree in co-relation 3391. Up to 1024 conditions per place. [2022-11-20 12:15:03,497 INFO L82 GeneralOperation]: Start removeDead. Operand has 303 places, 361 transitions, 842 flow [2022-11-20 12:15:03,715 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 303 places, 361 transitions, 842 flow [2022-11-20 12:15:03,716 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:15:03,717 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;@50917d7f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:15:03,717 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 12:15:03,746 INFO L130 PetriNetUnfolder]: 10/103 cut-off events. [2022-11-20 12:15:03,746 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 12:15:03,747 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:15:03,747 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] [2022-11-20 12:15:03,747 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:15:03,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:03,748 INFO L85 PathProgramCache]: Analyzing trace with hash 222728999, now seen corresponding path program 1 times [2022-11-20 12:15:03,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:03,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228725366] [2022-11-20 12:15:03,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:03,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:03,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:03,780 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 12:15:03,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:15:03,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228725366] [2022-11-20 12:15:03,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228725366] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:15:03,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:15:03,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:15:03,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637497090] [2022-11-20 12:15:03,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:15:03,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 12:15:03,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:15:03,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 12:15:03,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 12:15:03,791 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 361 [2022-11-20 12:15:03,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 361 transitions, 842 flow. Second operand has 2 states, 2 states have (on average 286.0) internal successors, (572), 2 states have internal predecessors, (572), 0 states have call successors, (0), 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 12:15:03,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:15:03,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 361 [2022-11-20 12:15:03,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:15:05,311 INFO L130 PetriNetUnfolder]: 785/4959 cut-off events. [2022-11-20 12:15:05,311 INFO L131 PetriNetUnfolder]: For 3220/3220 co-relation queries the response was YES. [2022-11-20 12:15:05,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7077 conditions, 4959 events. 785/4959 cut-off events. For 3220/3220 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 41190 event pairs, 522 based on Foata normal form. 6624/11301 useless extension candidates. Maximal degree in co-relation 3588. Up to 1033 conditions per place. [2022-11-20 12:15:05,503 INFO L137 encePairwiseOnDemand]: 302/361 looper letters, 16 selfloop transitions, 0 changer transitions 0/301 dead transitions. [2022-11-20 12:15:05,504 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 301 transitions, 754 flow [2022-11-20 12:15:05,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 12:15:05,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 12:15:05,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 645 transitions. [2022-11-20 12:15:05,508 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8933518005540166 [2022-11-20 12:15:05,508 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 645 transitions. [2022-11-20 12:15:05,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 645 transitions. [2022-11-20 12:15:05,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:15:05,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 645 transitions. [2022-11-20 12:15:05,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 322.5) internal successors, (645), 2 states have internal predecessors, (645), 0 states have call successors, (0), 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 12:15:05,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 361.0) internal successors, (1083), 3 states have internal predecessors, (1083), 0 states have call successors, (0), 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 12:15:05,512 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 361.0) internal successors, (1083), 3 states have internal predecessors, (1083), 0 states have call successors, (0), 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 12:15:05,512 INFO L175 Difference]: Start difference. First operand has 303 places, 361 transitions, 842 flow. Second operand 2 states and 645 transitions. [2022-11-20 12:15:05,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 301 transitions, 754 flow [2022-11-20 12:15:05,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 301 transitions, 754 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:15:05,519 INFO L231 Difference]: Finished difference. Result has 303 places, 301 transitions, 722 flow [2022-11-20 12:15:05,520 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=722, PETRI_PLACES=303, PETRI_TRANSITIONS=301} [2022-11-20 12:15:05,520 INFO L288 CegarLoopForPetriNet]: 303 programPoint places, 0 predicate places. [2022-11-20 12:15:05,520 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 301 transitions, 722 flow [2022-11-20 12:15:05,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 286.0) internal successors, (572), 2 states have internal predecessors, (572), 0 states have call successors, (0), 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 12:15:05,521 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:15:05,521 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] [2022-11-20 12:15:05,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-20 12:15:05,521 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:15:05,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:05,522 INFO L85 PathProgramCache]: Analyzing trace with hash -302465750, now seen corresponding path program 1 times [2022-11-20 12:15:05,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:05,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264954111] [2022-11-20 12:15:05,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:05,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:05,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:05,563 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 12:15:05,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:15:05,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264954111] [2022-11-20 12:15:05,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264954111] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:15:05,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:15:05,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:15:05,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613469150] [2022-11-20 12:15:05,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:15:05,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:15:05,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:15:05,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:15:05,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:15:05,570 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 361 [2022-11-20 12:15:05,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 301 transitions, 722 flow. Second operand has 3 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 0 states have call successors, (0), 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 12:15:05,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:15:05,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 361 [2022-11-20 12:15:05,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:15:07,237 INFO L130 PetriNetUnfolder]: 784/4926 cut-off events. [2022-11-20 12:15:07,238 INFO L131 PetriNetUnfolder]: For 3184/3184 co-relation queries the response was YES. [2022-11-20 12:15:07,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7089 conditions, 4926 events. 784/4926 cut-off events. For 3184/3184 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 40955 event pairs, 522 based on Foata normal form. 0/4646 useless extension candidates. Maximal degree in co-relation 7078. Up to 1072 conditions per place. [2022-11-20 12:15:07,319 INFO L137 encePairwiseOnDemand]: 358/361 looper letters, 25 selfloop transitions, 2 changer transitions 0/305 dead transitions. [2022-11-20 12:15:07,320 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 305 transitions, 784 flow [2022-11-20 12:15:07,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:15:07,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 12:15:07,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 862 transitions. [2022-11-20 12:15:07,322 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7959372114496768 [2022-11-20 12:15:07,322 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 862 transitions. [2022-11-20 12:15:07,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 862 transitions. [2022-11-20 12:15:07,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:15:07,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 862 transitions. [2022-11-20 12:15:07,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 287.3333333333333) internal successors, (862), 3 states have internal predecessors, (862), 0 states have call successors, (0), 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 12:15:07,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 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 12:15:07,328 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 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 12:15:07,329 INFO L175 Difference]: Start difference. First operand has 303 places, 301 transitions, 722 flow. Second operand 3 states and 862 transitions. [2022-11-20 12:15:07,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 305 transitions, 784 flow [2022-11-20 12:15:07,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 305 transitions, 784 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:15:07,336 INFO L231 Difference]: Finished difference. Result has 306 places, 302 transitions, 734 flow [2022-11-20 12:15:07,336 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=734, PETRI_PLACES=306, PETRI_TRANSITIONS=302} [2022-11-20 12:15:07,337 INFO L288 CegarLoopForPetriNet]: 303 programPoint places, 3 predicate places. [2022-11-20 12:15:07,337 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 302 transitions, 734 flow [2022-11-20 12:15:07,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 0 states have call successors, (0), 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 12:15:07,337 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:15:07,338 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] [2022-11-20 12:15:07,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-20 12:15:07,338 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:15:07,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:07,339 INFO L85 PathProgramCache]: Analyzing trace with hash 418376435, now seen corresponding path program 1 times [2022-11-20 12:15:07,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:07,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963595801] [2022-11-20 12:15:07,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:07,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:07,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:07,410 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 12:15:07,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:15:07,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963595801] [2022-11-20 12:15:07,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963595801] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:15:07,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527871730] [2022-11-20 12:15:07,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:07,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:15:07,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:15:07,415 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:15:07,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 12:15:07,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:07,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 12:15:07,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:15:07,614 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 12:15:07,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:15:07,664 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 12:15:07,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527871730] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:15:07,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:15:07,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 12:15:07,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128242251] [2022-11-20 12:15:07,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:15:07,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 12:15:07,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:15:07,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 12:15:07,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:15:07,670 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 361 [2022-11-20 12:15:07,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 302 transitions, 734 flow. Second operand has 10 states, 10 states have (on average 279.3) internal successors, (2793), 10 states have internal predecessors, (2793), 0 states have call successors, (0), 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 12:15:07,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:15:07,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 361 [2022-11-20 12:15:07,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:15:09,047 INFO L130 PetriNetUnfolder]: 782/4860 cut-off events. [2022-11-20 12:15:09,047 INFO L131 PetriNetUnfolder]: For 3187/3187 co-relation queries the response was YES. [2022-11-20 12:15:09,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7047 conditions, 4860 events. 782/4860 cut-off events. For 3187/3187 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 40684 event pairs, 526 based on Foata normal form. 2/4592 useless extension candidates. Maximal degree in co-relation 7034. Up to 1044 conditions per place. [2022-11-20 12:15:09,135 INFO L137 encePairwiseOnDemand]: 355/361 looper letters, 26 selfloop transitions, 9 changer transitions 0/312 dead transitions. [2022-11-20 12:15:09,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 312 transitions, 826 flow [2022-11-20 12:15:09,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:15:09,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 12:15:09,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2530 transitions. [2022-11-20 12:15:09,143 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7787011388119421 [2022-11-20 12:15:09,144 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2530 transitions. [2022-11-20 12:15:09,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2530 transitions. [2022-11-20 12:15:09,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:15:09,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2530 transitions. [2022-11-20 12:15:09,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 281.1111111111111) internal successors, (2530), 9 states have internal predecessors, (2530), 0 states have call successors, (0), 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 12:15:09,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 361.0) internal successors, (3610), 10 states have internal predecessors, (3610), 0 states have call successors, (0), 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 12:15:09,158 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 361.0) internal successors, (3610), 10 states have internal predecessors, (3610), 0 states have call successors, (0), 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 12:15:09,158 INFO L175 Difference]: Start difference. First operand has 306 places, 302 transitions, 734 flow. Second operand 9 states and 2530 transitions. [2022-11-20 12:15:09,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 312 transitions, 826 flow [2022-11-20 12:15:09,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 312 transitions, 824 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 12:15:09,166 INFO L231 Difference]: Finished difference. Result has 316 places, 308 transitions, 782 flow [2022-11-20 12:15:09,167 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=782, PETRI_PLACES=316, PETRI_TRANSITIONS=308} [2022-11-20 12:15:09,168 INFO L288 CegarLoopForPetriNet]: 303 programPoint places, 13 predicate places. [2022-11-20 12:15:09,168 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 308 transitions, 782 flow [2022-11-20 12:15:09,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 279.3) internal successors, (2793), 10 states have internal predecessors, (2793), 0 states have call successors, (0), 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 12:15:09,169 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:15:09,169 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:15:09,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-20 12:15:09,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:15:09,376 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:15:09,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:09,376 INFO L85 PathProgramCache]: Analyzing trace with hash 130779016, now seen corresponding path program 1 times [2022-11-20 12:15:09,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:09,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161436598] [2022-11-20 12:15:09,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:09,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:09,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:09,538 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:15:09,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:15:09,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161436598] [2022-11-20 12:15:09,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161436598] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:15:09,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797882905] [2022-11-20 12:15:09,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:09,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:15:09,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:15:09,541 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:15:09,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 12:15:09,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:09,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 12:15:09,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:15:09,824 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:15:09,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:15:09,955 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:15:09,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797882905] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:15:09,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:15:09,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 12:15:09,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853966774] [2022-11-20 12:15:09,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:15:09,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 12:15:09,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:15:09,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 12:15:09,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 12:15:09,963 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 361 [2022-11-20 12:15:09,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 308 transitions, 782 flow. Second operand has 18 states, 18 states have (on average 279.6111111111111) internal successors, (5033), 18 states have internal predecessors, (5033), 0 states have call successors, (0), 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 12:15:09,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:15:09,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 361 [2022-11-20 12:15:09,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:15:11,841 INFO L130 PetriNetUnfolder]: 778/4728 cut-off events. [2022-11-20 12:15:11,841 INFO L131 PetriNetUnfolder]: For 3219/3219 co-relation queries the response was YES. [2022-11-20 12:15:11,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6960 conditions, 4728 events. 778/4728 cut-off events. For 3219/3219 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 42315 event pairs, 642 based on Foata normal form. 4/4466 useless extension candidates. Maximal degree in co-relation 6945. Up to 1032 conditions per place. [2022-11-20 12:15:11,922 INFO L137 encePairwiseOnDemand]: 355/361 looper letters, 34 selfloop transitions, 21 changer transitions 0/332 dead transitions. [2022-11-20 12:15:11,923 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 332 transitions, 1000 flow [2022-11-20 12:15:11,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 12:15:11,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 12:15:11,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5876 transitions. [2022-11-20 12:15:11,931 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7750956338213956 [2022-11-20 12:15:11,931 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5876 transitions. [2022-11-20 12:15:11,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5876 transitions. [2022-11-20 12:15:11,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:15:11,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5876 transitions. [2022-11-20 12:15:11,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 279.8095238095238) internal successors, (5876), 21 states have internal predecessors, (5876), 0 states have call successors, (0), 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 12:15:11,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 361.0) internal successors, (7942), 22 states have internal predecessors, (7942), 0 states have call successors, (0), 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 12:15:11,954 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 361.0) internal successors, (7942), 22 states have internal predecessors, (7942), 0 states have call successors, (0), 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 12:15:11,955 INFO L175 Difference]: Start difference. First operand has 316 places, 308 transitions, 782 flow. Second operand 21 states and 5876 transitions. [2022-11-20 12:15:11,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 332 transitions, 1000 flow [2022-11-20 12:15:11,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 332 transitions, 986 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 12:15:11,963 INFO L231 Difference]: Finished difference. Result has 340 places, 321 transitions, 906 flow [2022-11-20 12:15:11,963 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=906, PETRI_PLACES=340, PETRI_TRANSITIONS=321} [2022-11-20 12:15:11,964 INFO L288 CegarLoopForPetriNet]: 303 programPoint places, 37 predicate places. [2022-11-20 12:15:11,964 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 321 transitions, 906 flow [2022-11-20 12:15:11,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 279.6111111111111) internal successors, (5033), 18 states have internal predecessors, (5033), 0 states have call successors, (0), 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 12:15:11,965 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:15:11,966 INFO L209 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:15:11,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 12:15:12,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-20 12:15:12,172 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:15:12,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:12,172 INFO L85 PathProgramCache]: Analyzing trace with hash -729596358, now seen corresponding path program 1 times [2022-11-20 12:15:12,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:12,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649404464] [2022-11-20 12:15:12,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:12,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:12,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:15:12,209 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 12:15:12,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:15:12,238 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 12:15:12,238 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 12:15:12,238 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 12:15:12,238 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 12:15:12,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-20 12:15:12,239 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-20 12:15:12,242 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 12:15:12,242 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2022-11-20 12:15:12,286 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2022-11-20 12:15:12,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 330 places, 394 transitions, 932 flow [2022-11-20 12:15:15,059 INFO L130 PetriNetUnfolder]: 2477/10311 cut-off events. [2022-11-20 12:15:15,059 INFO L131 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2022-11-20 12:15:15,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12688 conditions, 10311 events. 2477/10311 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 95915 event pairs, 1291 based on Foata normal form. 0/9104 useless extension candidates. Maximal degree in co-relation 6429. Up to 2304 conditions per place. [2022-11-20 12:15:15,216 INFO L82 GeneralOperation]: Start removeDead. Operand has 330 places, 394 transitions, 932 flow [2022-11-20 12:15:15,543 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 330 places, 394 transitions, 932 flow [2022-11-20 12:15:15,544 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:15:15,544 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;@50917d7f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:15:15,545 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 12:15:15,551 INFO L130 PetriNetUnfolder]: 10/103 cut-off events. [2022-11-20 12:15:15,552 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 12:15:15,552 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:15:15,552 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] [2022-11-20 12:15:15,552 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:15:15,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:15,553 INFO L85 PathProgramCache]: Analyzing trace with hash -152093775, now seen corresponding path program 1 times [2022-11-20 12:15:15,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:15,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592769627] [2022-11-20 12:15:15,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:15,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:15,571 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 12:15:15,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:15:15,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592769627] [2022-11-20 12:15:15,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592769627] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:15:15,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:15:15,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:15:15,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506212818] [2022-11-20 12:15:15,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:15:15,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 12:15:15,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:15:15,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 12:15:15,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 12:15:15,575 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 394 [2022-11-20 12:15:15,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 394 transitions, 932 flow. Second operand has 2 states, 2 states have (on average 311.0) internal successors, (622), 2 states have internal predecessors, (622), 0 states have call successors, (0), 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 12:15:15,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:15:15,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 394 [2022-11-20 12:15:15,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:15:18,591 INFO L130 PetriNetUnfolder]: 1811/9635 cut-off events. [2022-11-20 12:15:18,591 INFO L131 PetriNetUnfolder]: For 7113/7113 co-relation queries the response was YES. [2022-11-20 12:15:18,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14326 conditions, 9635 events. 1811/9635 cut-off events. For 7113/7113 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 93041 event pairs, 1291 based on Foata normal form. 14613/23707 useless extension candidates. Maximal degree in co-relation 7058. Up to 2314 conditions per place. [2022-11-20 12:15:18,807 INFO L137 encePairwiseOnDemand]: 329/394 looper letters, 18 selfloop transitions, 0 changer transitions 0/328 dead transitions. [2022-11-20 12:15:18,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 328 transitions, 836 flow [2022-11-20 12:15:18,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 12:15:18,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 12:15:18,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 703 transitions. [2022-11-20 12:15:18,810 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8921319796954315 [2022-11-20 12:15:18,810 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 703 transitions. [2022-11-20 12:15:18,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 703 transitions. [2022-11-20 12:15:18,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:15:18,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 703 transitions. [2022-11-20 12:15:18,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 351.5) internal successors, (703), 2 states have internal predecessors, (703), 0 states have call successors, (0), 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 12:15:18,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 394.0) internal successors, (1182), 3 states have internal predecessors, (1182), 0 states have call successors, (0), 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 12:15:18,816 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 394.0) internal successors, (1182), 3 states have internal predecessors, (1182), 0 states have call successors, (0), 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 12:15:18,816 INFO L175 Difference]: Start difference. First operand has 330 places, 394 transitions, 932 flow. Second operand 2 states and 703 transitions. [2022-11-20 12:15:18,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 328 transitions, 836 flow [2022-11-20 12:15:18,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 328 transitions, 836 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:15:18,826 INFO L231 Difference]: Finished difference. Result has 330 places, 328 transitions, 800 flow [2022-11-20 12:15:18,827 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=800, PETRI_PLACES=330, PETRI_TRANSITIONS=328} [2022-11-20 12:15:18,828 INFO L288 CegarLoopForPetriNet]: 330 programPoint places, 0 predicate places. [2022-11-20 12:15:18,828 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 328 transitions, 800 flow [2022-11-20 12:15:18,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 311.0) internal successors, (622), 2 states have internal predecessors, (622), 0 states have call successors, (0), 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 12:15:18,829 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:15:18,829 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] [2022-11-20 12:15:18,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-20 12:15:18,829 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:15:18,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:18,830 INFO L85 PathProgramCache]: Analyzing trace with hash -39714774, now seen corresponding path program 1 times [2022-11-20 12:15:18,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:18,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888677659] [2022-11-20 12:15:18,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:18,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:18,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:18,884 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 12:15:18,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:15:18,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888677659] [2022-11-20 12:15:18,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888677659] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:15:18,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:15:18,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:15:18,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673348115] [2022-11-20 12:15:18,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:15:18,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:15:18,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:15:18,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:15:18,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:15:18,888 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 394 [2022-11-20 12:15:18,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 328 transitions, 800 flow. Second operand has 3 states, 3 states have (on average 304.0) internal successors, (912), 3 states have internal predecessors, (912), 0 states have call successors, (0), 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 12:15:18,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:15:18,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 394 [2022-11-20 12:15:18,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:15:22,266 INFO L130 PetriNetUnfolder]: 1810/9602 cut-off events. [2022-11-20 12:15:22,266 INFO L131 PetriNetUnfolder]: For 7068/7068 co-relation queries the response was YES. [2022-11-20 12:15:22,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14343 conditions, 9602 events. 1810/9602 cut-off events. For 7068/7068 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 92859 event pairs, 1291 based on Foata normal form. 0/9063 useless extension candidates. Maximal degree in co-relation 14331. Up to 2358 conditions per place. [2022-11-20 12:15:22,746 INFO L137 encePairwiseOnDemand]: 391/394 looper letters, 27 selfloop transitions, 2 changer transitions 0/332 dead transitions. [2022-11-20 12:15:22,746 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 332 transitions, 866 flow [2022-11-20 12:15:22,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:15:22,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 12:15:22,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 939 transitions. [2022-11-20 12:15:22,748 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7944162436548223 [2022-11-20 12:15:22,748 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 939 transitions. [2022-11-20 12:15:22,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 939 transitions. [2022-11-20 12:15:22,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:15:22,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 939 transitions. [2022-11-20 12:15:22,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 313.0) internal successors, (939), 3 states have internal predecessors, (939), 0 states have call successors, (0), 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 12:15:22,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 394.0) internal successors, (1576), 4 states have internal predecessors, (1576), 0 states have call successors, (0), 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 12:15:22,753 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 394.0) internal successors, (1576), 4 states have internal predecessors, (1576), 0 states have call successors, (0), 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 12:15:22,754 INFO L175 Difference]: Start difference. First operand has 330 places, 328 transitions, 800 flow. Second operand 3 states and 939 transitions. [2022-11-20 12:15:22,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 332 transitions, 866 flow [2022-11-20 12:15:22,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 332 transitions, 866 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:15:22,762 INFO L231 Difference]: Finished difference. Result has 333 places, 329 transitions, 812 flow [2022-11-20 12:15:22,762 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=812, PETRI_PLACES=333, PETRI_TRANSITIONS=329} [2022-11-20 12:15:22,763 INFO L288 CegarLoopForPetriNet]: 330 programPoint places, 3 predicate places. [2022-11-20 12:15:22,763 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 329 transitions, 812 flow [2022-11-20 12:15:22,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 304.0) internal successors, (912), 3 states have internal predecessors, (912), 0 states have call successors, (0), 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 12:15:22,763 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:15:22,764 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] [2022-11-20 12:15:22,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-20 12:15:22,764 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:15:22,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:22,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1388246958, now seen corresponding path program 1 times [2022-11-20 12:15:22,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:22,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4450313] [2022-11-20 12:15:22,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:22,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:22,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:22,836 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 12:15:22,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:15:22,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4450313] [2022-11-20 12:15:22,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4450313] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:15:22,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529290620] [2022-11-20 12:15:22,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:22,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:15:22,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:15:22,838 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:15:22,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 12:15:23,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:23,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 12:15:23,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:15:23,076 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 12:15:23,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:15:23,128 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 12:15:23,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529290620] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:15:23,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:15:23,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 12:15:23,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114901919] [2022-11-20 12:15:23,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:15:23,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 12:15:23,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:15:23,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 12:15:23,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:15:23,134 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 394 [2022-11-20 12:15:23,137 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 329 transitions, 812 flow. Second operand has 10 states, 10 states have (on average 304.3) internal successors, (3043), 10 states have internal predecessors, (3043), 0 states have call successors, (0), 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 12:15:23,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:15:23,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 394 [2022-11-20 12:15:23,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:15:26,394 INFO L130 PetriNetUnfolder]: 1808/9536 cut-off events. [2022-11-20 12:15:26,394 INFO L131 PetriNetUnfolder]: For 7071/7071 co-relation queries the response was YES. [2022-11-20 12:15:26,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14304 conditions, 9536 events. 1808/9536 cut-off events. For 7071/7071 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 92335 event pairs, 1295 based on Foata normal form. 2/9010 useless extension candidates. Maximal degree in co-relation 14290. Up to 2327 conditions per place. [2022-11-20 12:15:26,598 INFO L137 encePairwiseOnDemand]: 388/394 looper letters, 28 selfloop transitions, 9 changer transitions 0/339 dead transitions. [2022-11-20 12:15:26,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 339 transitions, 908 flow [2022-11-20 12:15:26,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:15:26,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 12:15:26,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2757 transitions. [2022-11-20 12:15:26,603 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7774957698815567 [2022-11-20 12:15:26,603 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2757 transitions. [2022-11-20 12:15:26,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2757 transitions. [2022-11-20 12:15:26,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:15:26,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2757 transitions. [2022-11-20 12:15:26,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 306.3333333333333) internal successors, (2757), 9 states have internal predecessors, (2757), 0 states have call successors, (0), 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 12:15:26,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 394.0) internal successors, (3940), 10 states have internal predecessors, (3940), 0 states have call successors, (0), 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 12:15:26,614 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 394.0) internal successors, (3940), 10 states have internal predecessors, (3940), 0 states have call successors, (0), 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 12:15:26,615 INFO L175 Difference]: Start difference. First operand has 333 places, 329 transitions, 812 flow. Second operand 9 states and 2757 transitions. [2022-11-20 12:15:26,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 339 transitions, 908 flow [2022-11-20 12:15:26,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 339 transitions, 906 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 12:15:26,624 INFO L231 Difference]: Finished difference. Result has 343 places, 335 transitions, 860 flow [2022-11-20 12:15:26,625 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=860, PETRI_PLACES=343, PETRI_TRANSITIONS=335} [2022-11-20 12:15:26,626 INFO L288 CegarLoopForPetriNet]: 330 programPoint places, 13 predicate places. [2022-11-20 12:15:26,626 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 335 transitions, 860 flow [2022-11-20 12:15:26,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 304.3) internal successors, (3043), 10 states have internal predecessors, (3043), 0 states have call successors, (0), 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 12:15:26,627 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:15:26,627 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:15:26,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 12:15:26,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:15:26,836 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:15:26,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:26,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1444170085, now seen corresponding path program 1 times [2022-11-20 12:15:26,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:26,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266576180] [2022-11-20 12:15:26,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:26,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:26,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:27,000 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:15:27,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:15:27,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266576180] [2022-11-20 12:15:27,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266576180] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:15:27,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162991060] [2022-11-20 12:15:27,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:27,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:15:27,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:15:27,003 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:15:27,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 12:15:27,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:27,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 12:15:27,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:15:27,280 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:15:27,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:15:27,406 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:15:27,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162991060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:15:27,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:15:27,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 12:15:27,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579771768] [2022-11-20 12:15:27,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:15:27,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 12:15:27,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:15:27,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 12:15:27,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 12:15:27,411 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 394 [2022-11-20 12:15:27,415 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 335 transitions, 860 flow. Second operand has 18 states, 18 states have (on average 304.6111111111111) internal successors, (5483), 18 states have internal predecessors, (5483), 0 states have call successors, (0), 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 12:15:27,415 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:15:27,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 394 [2022-11-20 12:15:27,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:15:30,858 INFO L130 PetriNetUnfolder]: 1804/9404 cut-off events. [2022-11-20 12:15:30,858 INFO L131 PetriNetUnfolder]: For 7108/7108 co-relation queries the response was YES. [2022-11-20 12:15:30,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14225 conditions, 9404 events. 1804/9404 cut-off events. For 7108/7108 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 95570 event pairs, 1411 based on Foata normal form. 4/8884 useless extension candidates. Maximal degree in co-relation 14209. Up to 2315 conditions per place. [2022-11-20 12:15:31,060 INFO L137 encePairwiseOnDemand]: 388/394 looper letters, 36 selfloop transitions, 21 changer transitions 0/359 dead transitions. [2022-11-20 12:15:31,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 359 transitions, 1082 flow [2022-11-20 12:15:31,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 12:15:31,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 12:15:31,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6403 transitions. [2022-11-20 12:15:31,070 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7738699540729997 [2022-11-20 12:15:31,070 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6403 transitions. [2022-11-20 12:15:31,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6403 transitions. [2022-11-20 12:15:31,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:15:31,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6403 transitions. [2022-11-20 12:15:31,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 304.9047619047619) internal successors, (6403), 21 states have internal predecessors, (6403), 0 states have call successors, (0), 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 12:15:31,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 394.0) internal successors, (8668), 22 states have internal predecessors, (8668), 0 states have call successors, (0), 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 12:15:31,100 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 394.0) internal successors, (8668), 22 states have internal predecessors, (8668), 0 states have call successors, (0), 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 12:15:31,101 INFO L175 Difference]: Start difference. First operand has 343 places, 335 transitions, 860 flow. Second operand 21 states and 6403 transitions. [2022-11-20 12:15:31,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 359 transitions, 1082 flow [2022-11-20 12:15:31,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 359 transitions, 1068 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 12:15:31,118 INFO L231 Difference]: Finished difference. Result has 367 places, 348 transitions, 984 flow [2022-11-20 12:15:31,119 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=984, PETRI_PLACES=367, PETRI_TRANSITIONS=348} [2022-11-20 12:15:31,119 INFO L288 CegarLoopForPetriNet]: 330 programPoint places, 37 predicate places. [2022-11-20 12:15:31,119 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 348 transitions, 984 flow [2022-11-20 12:15:31,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 304.6111111111111) internal successors, (5483), 18 states have internal predecessors, (5483), 0 states have call successors, (0), 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 12:15:31,121 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:15:31,121 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:15:31,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 12:15:31,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4657cfd4-7382-43d3-b3d3-0dc9473b9150/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-20 12:15:31,328 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:15:31,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:31,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1457464127, now seen corresponding path program 1 times [2022-11-20 12:15:31,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:31,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646166135] [2022-11-20 12:15:31,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:31,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:31,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:15:31,376 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 12:15:31,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:15:31,418 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 12:15:31,419 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 12:15:31,420 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 12:15:31,420 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 12:15:31,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-20 12:15:31,421 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-20 12:15:31,422 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 12:15:31,422 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2022-11-20 12:15:31,486 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2022-11-20 12:15:31,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 357 places, 427 transitions, 1024 flow [2022-11-20 12:15:38,219 INFO L130 PetriNetUnfolder]: 5311/20380 cut-off events. [2022-11-20 12:15:38,219 INFO L131 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2022-11-20 12:15:38,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25586 conditions, 20380 events. 5311/20380 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 214697 event pairs, 3084 based on Foata normal form. 0/18130 useless extension candidates. Maximal degree in co-relation 12668. Up to 5120 conditions per place. [2022-11-20 12:15:38,657 INFO L82 GeneralOperation]: Start removeDead. Operand has 357 places, 427 transitions, 1024 flow [2022-11-20 12:15:39,003 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 357 places, 427 transitions, 1024 flow [2022-11-20 12:15:39,004 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:15:39,005 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;@50917d7f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:15:39,005 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 12:15:39,015 INFO L130 PetriNetUnfolder]: 10/103 cut-off events. [2022-11-20 12:15:39,015 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 12:15:39,015 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:15:39,015 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] [2022-11-20 12:15:39,016 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:15:39,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:39,016 INFO L85 PathProgramCache]: Analyzing trace with hash -819932708, now seen corresponding path program 1 times [2022-11-20 12:15:39,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:39,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696383596] [2022-11-20 12:15:39,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:39,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:39,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:39,041 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 12:15:39,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:15:39,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696383596] [2022-11-20 12:15:39,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696383596] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:15:39,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:15:39,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:15:39,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937277714] [2022-11-20 12:15:39,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:15:39,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 12:15:39,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:15:39,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 12:15:39,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 12:15:39,045 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 335 out of 427 [2022-11-20 12:15:39,046 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 427 transitions, 1024 flow. Second operand has 2 states, 2 states have (on average 336.0) internal successors, (672), 2 states have internal predecessors, (672), 0 states have call successors, (0), 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 12:15:39,046 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:15:39,046 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 335 of 427 [2022-11-20 12:15:39,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:15:46,135 INFO L130 PetriNetUnfolder]: 4117/19175 cut-off events. [2022-11-20 12:15:46,135 INFO L131 PetriNetUnfolder]: For 15625/15625 co-relation queries the response was YES. [2022-11-20 12:15:46,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29512 conditions, 19175 events. 4117/19175 cut-off events. For 15625/15625 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 210021 event pairs, 3084 based on Foata normal form. 32080/50199 useless extension candidates. Maximal degree in co-relation 14305. Up to 5131 conditions per place.