./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_73-funloop_hard_racefree.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_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/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_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_73-funloop_hard_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/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_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/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 c8af2e9e80aefb6a93651d6c869df13510f679bd9566c8571973545c9393aab5 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 11:24:06,281 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:24:06,284 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:24:06,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:24:06,325 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:24:06,329 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:24:06,332 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:24:06,335 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:24:06,340 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:24:06,343 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:24:06,345 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:24:06,347 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:24:06,348 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:24:06,353 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:24:06,354 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:24:06,356 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:24:06,358 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:24:06,359 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:24:06,361 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:24:06,367 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:24:06,369 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:24:06,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:24:06,381 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:24:06,382 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:24:06,391 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:24:06,393 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:24:06,393 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:24:06,395 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:24:06,395 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:24:06,398 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:24:06,398 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:24:06,399 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:24:06,401 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:24:06,401 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:24:06,402 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:24:06,403 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:24:06,403 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:24:06,403 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:24:06,404 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:24:06,405 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:24:06,418 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:24:06,419 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:24:06,438 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:24:06,438 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:24:06,439 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:24:06,439 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:24:06,439 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:24:06,440 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:24:06,440 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:24:06,440 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:24:06,441 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:24:06,441 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:24:06,441 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:24:06,441 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:24:06,441 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:24:06,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:24:06,442 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:24:06,442 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:24:06,442 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:24:06,442 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:24:06,442 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:24:06,443 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:24:06,443 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:24:06,443 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:24:06,443 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:24:06,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:24:06,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:24:06,444 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:24:06,444 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:24:06,444 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:24:06,444 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:24:06,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:24:06,445 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:24:06,445 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:24:06,445 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:24:06,445 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_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8af2e9e80aefb6a93651d6c869df13510f679bd9566c8571973545c9393aab5 [2022-11-20 11:24:06,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:24:06,741 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:24:06,744 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:24:06,745 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:24:06,745 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:24:06,746 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/goblint-regression/28-race_reach_73-funloop_hard_racefree.i [2022-11-20 11:24:09,801 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:24:10,158 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:24:10,159 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/sv-benchmarks/c/goblint-regression/28-race_reach_73-funloop_hard_racefree.i [2022-11-20 11:24:10,179 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/data/faa817225/be229e10c95f4f31bc08d73af8ebc455/FLAG538250634 [2022-11-20 11:24:10,195 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/data/faa817225/be229e10c95f4f31bc08d73af8ebc455 [2022-11-20 11:24:10,197 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:24:10,200 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:24:10,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:24:10,206 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:24:10,210 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:24:10,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:24:10" (1/1) ... [2022-11-20 11:24:10,211 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e5b76b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:24:10, skipping insertion in model container [2022-11-20 11:24:10,211 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:24:10" (1/1) ... [2022-11-20 11:24:10,219 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:24:10,278 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:24:10,888 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_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/sv-benchmarks/c/goblint-regression/28-race_reach_73-funloop_hard_racefree.i[41323,41336] [2022-11-20 11:24:10,936 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:24:10,950 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:24:10,984 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_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/sv-benchmarks/c/goblint-regression/28-race_reach_73-funloop_hard_racefree.i[41323,41336] [2022-11-20 11:24:10,996 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:24:11,052 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:24:11,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:24:11 WrapperNode [2022-11-20 11:24:11,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:24:11,054 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:24:11,054 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:24:11,054 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:24:11,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:24:11" (1/1) ... [2022-11-20 11:24:11,078 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:24:11" (1/1) ... [2022-11-20 11:24:11,106 INFO L138 Inliner]: procedures = 271, calls = 41, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 247 [2022-11-20 11:24:11,106 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:24:11,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:24:11,107 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:24:11,107 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:24:11,117 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:24:11" (1/1) ... [2022-11-20 11:24:11,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:24:11" (1/1) ... [2022-11-20 11:24:11,121 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:24:11" (1/1) ... [2022-11-20 11:24:11,122 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:24:11" (1/1) ... [2022-11-20 11:24:11,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:24:11" (1/1) ... [2022-11-20 11:24:11,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:24:11" (1/1) ... [2022-11-20 11:24:11,140 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:24:11" (1/1) ... [2022-11-20 11:24:11,142 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:24:11" (1/1) ... [2022-11-20 11:24:11,146 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:24:11,146 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:24:11,147 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:24:11,147 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:24:11,148 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:24:11" (1/1) ... [2022-11-20 11:24:11,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:24:11,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:24:11,204 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:24:11,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:24:11,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:24:11,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:24:11,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:24:11,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:24:11,245 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-20 11:24:11,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:24:11,245 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-20 11:24:11,246 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-20 11:24:11,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:24:11,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:24:11,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:24:11,248 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 11:24:11,389 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:24:11,391 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:24:11,806 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:24:11,814 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:24:11,815 INFO L300 CfgBuilder]: Removed 35 assume(true) statements. [2022-11-20 11:24:11,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:24:11 BoogieIcfgContainer [2022-11-20 11:24:11,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:24:11,820 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:24:11,820 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:24:11,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:24:11,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:24:10" (1/3) ... [2022-11-20 11:24:11,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60e0eace and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:24:11, skipping insertion in model container [2022-11-20 11:24:11,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:24:11" (2/3) ... [2022-11-20 11:24:11,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60e0eace and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:24:11, skipping insertion in model container [2022-11-20 11:24:11,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:24:11" (3/3) ... [2022-11-20 11:24:11,826 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_73-funloop_hard_racefree.i [2022-11-20 11:24:11,834 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 11:24:11,845 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:24:11,846 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-11-20 11:24:11,846 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 11:24:11,924 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-20 11:24:11,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 255 transitions, 518 flow [2022-11-20 11:24:12,151 INFO L130 PetriNetUnfolder]: 73/394 cut-off events. [2022-11-20 11:24:12,151 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 11:24:12,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 394 events. 73/394 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1784 event pairs, 0 based on Foata normal form. 0/313 useless extension candidates. Maximal degree in co-relation 215. Up to 8 conditions per place. [2022-11-20 11:24:12,168 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 255 transitions, 518 flow [2022-11-20 11:24:12,177 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 250 transitions, 505 flow [2022-11-20 11:24:12,187 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:24:12,194 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;@68fae2aa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:24:12,194 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-20 11:24:12,220 INFO L130 PetriNetUnfolder]: 17/143 cut-off events. [2022-11-20 11:24:12,220 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:24:12,221 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:24:12,221 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] [2022-11-20 11:24:12,222 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 11:24:12,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:24:12,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1488741163, now seen corresponding path program 1 times [2022-11-20 11:24:12,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:24:12,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578136152] [2022-11-20 11:24:12,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:12,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:24:12,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:12,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:24:12,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:24:12,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578136152] [2022-11-20 11:24:12,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578136152] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:24:12,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:24:12,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:24:12,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484604781] [2022-11-20 11:24:12,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:24:12,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:24:12,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:24:12,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:24:12,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:24:12,553 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 255 [2022-11-20 11:24:12,560 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 250 transitions, 505 flow. Second operand has 2 states, 2 states have (on average 213.0) internal successors, (426), 2 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:12,560 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:24:12,560 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 255 [2022-11-20 11:24:12,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:24:12,688 INFO L130 PetriNetUnfolder]: 9/321 cut-off events. [2022-11-20 11:24:12,689 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 11:24:12,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 321 events. 9/321 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1413 event pairs, 0 based on Foata normal form. 63/366 useless extension candidates. Maximal degree in co-relation 177. Up to 4 conditions per place. [2022-11-20 11:24:12,694 INFO L137 encePairwiseOnDemand]: 217/255 looper letters, 1 selfloop transitions, 0 changer transitions 0/209 dead transitions. [2022-11-20 11:24:12,695 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 209 transitions, 425 flow [2022-11-20 11:24:12,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:24:12,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:24:12,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 463 transitions. [2022-11-20 11:24:12,709 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.907843137254902 [2022-11-20 11:24:12,710 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 463 transitions. [2022-11-20 11:24:12,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 463 transitions. [2022-11-20 11:24:12,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:24:12,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 463 transitions. [2022-11-20 11:24:12,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 231.5) internal successors, (463), 2 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:12,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:12,726 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:12,728 INFO L175 Difference]: Start difference. First operand has 209 places, 250 transitions, 505 flow. Second operand 2 states and 463 transitions. [2022-11-20 11:24:12,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 209 transitions, 425 flow [2022-11-20 11:24:12,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 209 transitions, 425 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:24:12,737 INFO L231 Difference]: Finished difference. Result has 207 places, 209 transitions, 423 flow [2022-11-20 11:24:12,739 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=423, PETRI_PLACES=207, PETRI_TRANSITIONS=209} [2022-11-20 11:24:12,743 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, -2 predicate places. [2022-11-20 11:24:12,743 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 209 transitions, 423 flow [2022-11-20 11:24:12,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 213.0) internal successors, (426), 2 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:12,744 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:24:12,744 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] [2022-11-20 11:24:12,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:24:12,745 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 11:24:12,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:24:12,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1961754262, now seen corresponding path program 1 times [2022-11-20 11:24:12,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:24:12,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573332226] [2022-11-20 11:24:12,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:12,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:24:12,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:12,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:24:12,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:24:12,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573332226] [2022-11-20 11:24:12,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573332226] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:24:12,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:24:12,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:24:12,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441489704] [2022-11-20 11:24:12,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:24:12,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:24:12,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:24:12,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:24:12,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:24:12,869 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 255 [2022-11-20 11:24:12,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 209 transitions, 423 flow. Second operand has 3 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:12,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:24:12,871 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 255 [2022-11-20 11:24:12,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:24:12,942 INFO L130 PetriNetUnfolder]: 9/325 cut-off events. [2022-11-20 11:24:12,942 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 11:24:12,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344 conditions, 325 events. 9/325 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1411 event pairs, 0 based on Foata normal form. 0/307 useless extension candidates. Maximal degree in co-relation 340. Up to 9 conditions per place. [2022-11-20 11:24:12,946 INFO L137 encePairwiseOnDemand]: 252/255 looper letters, 10 selfloop transitions, 2 changer transitions 0/213 dead transitions. [2022-11-20 11:24:12,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 213 transitions, 455 flow [2022-11-20 11:24:12,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:24:12,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:24:12,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 628 transitions. [2022-11-20 11:24:12,949 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8209150326797385 [2022-11-20 11:24:12,949 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 628 transitions. [2022-11-20 11:24:12,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 628 transitions. [2022-11-20 11:24:12,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:24:12,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 628 transitions. [2022-11-20 11:24:12,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:12,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:12,955 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:12,956 INFO L175 Difference]: Start difference. First operand has 207 places, 209 transitions, 423 flow. Second operand 3 states and 628 transitions. [2022-11-20 11:24:12,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 213 transitions, 455 flow [2022-11-20 11:24:12,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 213 transitions, 455 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:24:12,961 INFO L231 Difference]: Finished difference. Result has 210 places, 210 transitions, 435 flow [2022-11-20 11:24:12,961 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=435, PETRI_PLACES=210, PETRI_TRANSITIONS=210} [2022-11-20 11:24:12,962 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, 1 predicate places. [2022-11-20 11:24:12,963 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 210 transitions, 435 flow [2022-11-20 11:24:12,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:12,963 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:24:12,964 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, 1, 1, 1] [2022-11-20 11:24:12,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:24:12,964 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 11:24:12,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:24:12,965 INFO L85 PathProgramCache]: Analyzing trace with hash -929438698, now seen corresponding path program 1 times [2022-11-20 11:24:12,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:24:12,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341239042] [2022-11-20 11:24:12,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:12,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:24:12,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:13,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:24:13,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:24:13,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341239042] [2022-11-20 11:24:13,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341239042] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:24:13,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494786121] [2022-11-20 11:24:13,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:13,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:24:13,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:24:13,274 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:24:13,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:24:13,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:13,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:24:13,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:24:13,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:24:13,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:24:13,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:24:13,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494786121] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:24:13,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:24:13,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:24:13,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926479719] [2022-11-20 11:24:13,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:24:13,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:24:13,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:24:13,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:24:13,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:24:13,504 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 255 [2022-11-20 11:24:13,506 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 210 transitions, 435 flow. Second operand has 10 states, 10 states have (on average 206.1) internal successors, (2061), 10 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:13,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:24:13,507 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 255 [2022-11-20 11:24:13,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:24:13,647 INFO L130 PetriNetUnfolder]: 9/332 cut-off events. [2022-11-20 11:24:13,648 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 11:24:13,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 332 events. 9/332 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1405 event pairs, 0 based on Foata normal form. 2/317 useless extension candidates. Maximal degree in co-relation 361. Up to 6 conditions per place. [2022-11-20 11:24:13,652 INFO L137 encePairwiseOnDemand]: 249/255 looper letters, 11 selfloop transitions, 9 changer transitions 0/220 dead transitions. [2022-11-20 11:24:13,652 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 220 transitions, 497 flow [2022-11-20 11:24:13,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:24:13,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:24:13,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1858 transitions. [2022-11-20 11:24:13,657 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8095860566448801 [2022-11-20 11:24:13,658 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1858 transitions. [2022-11-20 11:24:13,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1858 transitions. [2022-11-20 11:24:13,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:24:13,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1858 transitions. [2022-11-20 11:24:13,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 206.44444444444446) internal successors, (1858), 9 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:13,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 255.0) internal successors, (2550), 10 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:13,671 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 255.0) internal successors, (2550), 10 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:13,672 INFO L175 Difference]: Start difference. First operand has 210 places, 210 transitions, 435 flow. Second operand 9 states and 1858 transitions. [2022-11-20 11:24:13,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 220 transitions, 497 flow [2022-11-20 11:24:13,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 220 transitions, 495 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:24:13,678 INFO L231 Difference]: Finished difference. Result has 220 places, 216 transitions, 483 flow [2022-11-20 11:24:13,679 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=483, PETRI_PLACES=220, PETRI_TRANSITIONS=216} [2022-11-20 11:24:13,680 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, 11 predicate places. [2022-11-20 11:24:13,680 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 216 transitions, 483 flow [2022-11-20 11:24:13,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 206.1) internal successors, (2061), 10 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:13,682 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:24:13,683 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 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] [2022-11-20 11:24:13,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:24:13,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:24:13,889 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 11:24:13,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:24:13,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1473481706, now seen corresponding path program 2 times [2022-11-20 11:24:13,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:24:13,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181599867] [2022-11-20 11:24:13,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:13,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:24:13,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:14,156 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:24:14,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:24:14,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181599867] [2022-11-20 11:24:14,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181599867] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:24:14,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559741617] [2022-11-20 11:24:14,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:24:14,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:24:14,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:24:14,160 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:24:14,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:24:14,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:24:14,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:24:14,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:24:14,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:24:14,320 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:24:14,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:24:14,480 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:24:14,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559741617] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:24:14,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:24:14,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 11:24:14,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963731735] [2022-11-20 11:24:14,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:24:14,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:24:14,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:24:14,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:24:14,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:24:14,489 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 255 [2022-11-20 11:24:14,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 216 transitions, 483 flow. Second operand has 18 states, 18 states have (on average 206.27777777777777) internal successors, (3713), 18 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:14,494 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:24:14,494 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 255 [2022-11-20 11:24:14,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:24:14,829 INFO L130 PetriNetUnfolder]: 9/352 cut-off events. [2022-11-20 11:24:14,830 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-11-20 11:24:14,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 456 conditions, 352 events. 9/352 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1404 event pairs, 0 based on Foata normal form. 4/339 useless extension candidates. Maximal degree in co-relation 448. Up to 11 conditions per place. [2022-11-20 11:24:14,833 INFO L137 encePairwiseOnDemand]: 249/255 looper letters, 19 selfloop transitions, 21 changer transitions 0/240 dead transitions. [2022-11-20 11:24:14,833 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 240 transitions, 671 flow [2022-11-20 11:24:14,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:24:14,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 11:24:14,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4328 transitions. [2022-11-20 11:24:14,842 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8082166199813259 [2022-11-20 11:24:14,842 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4328 transitions. [2022-11-20 11:24:14,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4328 transitions. [2022-11-20 11:24:14,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:24:14,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4328 transitions. [2022-11-20 11:24:14,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 206.0952380952381) internal successors, (4328), 21 states have internal predecessors, (4328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:14,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 255.0) internal successors, (5610), 22 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:14,865 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 255.0) internal successors, (5610), 22 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:14,865 INFO L175 Difference]: Start difference. First operand has 220 places, 216 transitions, 483 flow. Second operand 21 states and 4328 transitions. [2022-11-20 11:24:14,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 240 transitions, 671 flow [2022-11-20 11:24:14,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 240 transitions, 657 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 11:24:14,872 INFO L231 Difference]: Finished difference. Result has 244 places, 229 transitions, 607 flow [2022-11-20 11:24:14,872 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=607, PETRI_PLACES=244, PETRI_TRANSITIONS=229} [2022-11-20 11:24:14,873 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, 35 predicate places. [2022-11-20 11:24:14,873 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 229 transitions, 607 flow [2022-11-20 11:24:14,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 206.27777777777777) internal successors, (3713), 18 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:14,875 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:24:14,876 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 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] [2022-11-20 11:24:14,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:24:15,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:24:15,081 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 11:24:15,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:24:15,082 INFO L85 PathProgramCache]: Analyzing trace with hash -898264042, now seen corresponding path program 3 times [2022-11-20 11:24:15,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:24:15,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154101531] [2022-11-20 11:24:15,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:15,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:24:15,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:15,534 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:24:15,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:24:15,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154101531] [2022-11-20 11:24:15,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154101531] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:24:15,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976089601] [2022-11-20 11:24:15,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:24:15,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:24:15,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:24:15,537 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:24:15,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:24:15,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-20 11:24:15,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:24:15,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:24:15,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:24:15,819 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:24:15,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:24:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:24:16,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976089601] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:24:16,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:24:16,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-11-20 11:24:16,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078198748] [2022-11-20 11:24:16,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:24:16,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 11:24:16,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:24:16,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 11:24:16,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-11-20 11:24:16,099 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 255 [2022-11-20 11:24:16,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 229 transitions, 607 flow. Second operand has 23 states, 23 states have (on average 206.43478260869566) internal successors, (4748), 23 states have internal predecessors, (4748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:16,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:24:16,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 255 [2022-11-20 11:24:16,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:24:16,547 INFO L130 PetriNetUnfolder]: 9/367 cut-off events. [2022-11-20 11:24:16,547 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-11-20 11:24:16,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 557 conditions, 367 events. 9/367 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1402 event pairs, 0 based on Foata normal form. 3/353 useless extension candidates. Maximal degree in co-relation 544. Up to 17 conditions per place. [2022-11-20 11:24:16,551 INFO L137 encePairwiseOnDemand]: 249/255 looper letters, 25 selfloop transitions, 30 changer transitions 0/255 dead transitions. [2022-11-20 11:24:16,551 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 255 transitions, 863 flow [2022-11-20 11:24:16,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-20 11:24:16,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-20 11:24:16,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 6178 transitions. [2022-11-20 11:24:16,565 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8075816993464052 [2022-11-20 11:24:16,565 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 6178 transitions. [2022-11-20 11:24:16,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 6178 transitions. [2022-11-20 11:24:16,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:24:16,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 6178 transitions. [2022-11-20 11:24:16,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 205.93333333333334) internal successors, (6178), 30 states have internal predecessors, (6178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:16,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 255.0) internal successors, (7905), 31 states have internal predecessors, (7905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:16,611 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 255.0) internal successors, (7905), 31 states have internal predecessors, (7905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:16,611 INFO L175 Difference]: Start difference. First operand has 244 places, 229 transitions, 607 flow. Second operand 30 states and 6178 transitions. [2022-11-20 11:24:16,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 255 transitions, 863 flow [2022-11-20 11:24:16,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 255 transitions, 833 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-11-20 11:24:16,620 INFO L231 Difference]: Finished difference. Result has 271 places, 239 transitions, 735 flow [2022-11-20 11:24:16,620 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=735, PETRI_PLACES=271, PETRI_TRANSITIONS=239} [2022-11-20 11:24:16,621 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, 62 predicate places. [2022-11-20 11:24:16,621 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 239 transitions, 735 flow [2022-11-20 11:24:16,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 206.43478260869566) internal successors, (4748), 23 states have internal predecessors, (4748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:16,633 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:24:16,633 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 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] [2022-11-20 11:24:16,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-20 11:24:16,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:24:16,838 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 11:24:16,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:24:16,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1658269334, now seen corresponding path program 4 times [2022-11-20 11:24:16,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:24:16,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476434153] [2022-11-20 11:24:16,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:16,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:24:16,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:24:16,915 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:24:16,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:24:16,984 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:24:16,984 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:24:16,985 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-20 11:24:16,987 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-20 11:24:16,987 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-20 11:24:16,988 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-20 11:24:16,988 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-20 11:24:16,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 11:24:16,988 INFO L444 BasicCegarLoop]: Path program histogram: [4, 1, 1] [2022-11-20 11:24:16,991 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:24:16,991 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-20 11:24:17,032 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 11:24:17,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 328 transitions, 674 flow [2022-11-20 11:24:17,140 INFO L130 PetriNetUnfolder]: 118/631 cut-off events. [2022-11-20 11:24:17,140 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-20 11:24:17,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 645 conditions, 631 events. 118/631 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3239 event pairs, 0 based on Foata normal form. 0/501 useless extension candidates. Maximal degree in co-relation 396. Up to 12 conditions per place. [2022-11-20 11:24:17,147 INFO L82 GeneralOperation]: Start removeDead. Operand has 273 places, 328 transitions, 674 flow [2022-11-20 11:24:17,154 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 273 places, 328 transitions, 674 flow [2022-11-20 11:24:17,155 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:24:17,156 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;@68fae2aa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:24:17,156 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-20 11:24:17,170 INFO L130 PetriNetUnfolder]: 21/187 cut-off events. [2022-11-20 11:24:17,170 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 11:24:17,171 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:24:17,171 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] [2022-11-20 11:24:17,171 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-20 11:24:17,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:24:17,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1114127539, now seen corresponding path program 1 times [2022-11-20 11:24:17,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:24:17,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59699547] [2022-11-20 11:24:17,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:17,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:24:17,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:17,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:24:17,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59699547] [2022-11-20 11:24:17,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59699547] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:24:17,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:24:17,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:24:17,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146590654] [2022-11-20 11:24:17,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:24:17,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:24:17,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:24:17,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:24:17,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:24:17,206 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 328 [2022-11-20 11:24:17,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 328 transitions, 674 flow. Second operand has 2 states, 2 states have (on average 271.5) internal successors, (543), 2 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:17,207 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:24:17,207 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 328 [2022-11-20 11:24:17,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:24:17,317 INFO L130 PetriNetUnfolder]: 17/522 cut-off events. [2022-11-20 11:24:17,317 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-20 11:24:17,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543 conditions, 522 events. 17/522 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2735 event pairs, 0 based on Foata normal form. 126/619 useless extension candidates. Maximal degree in co-relation 330. Up to 7 conditions per place. [2022-11-20 11:24:17,325 INFO L137 encePairwiseOnDemand]: 278/328 looper letters, 4 selfloop transitions, 0 changer transitions 0/274 dead transitions. [2022-11-20 11:24:17,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 274 transitions, 574 flow [2022-11-20 11:24:17,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:24:17,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:24:17,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 594 transitions. [2022-11-20 11:24:17,327 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9054878048780488 [2022-11-20 11:24:17,327 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 594 transitions. [2022-11-20 11:24:17,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 594 transitions. [2022-11-20 11:24:17,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:24:17,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 594 transitions. [2022-11-20 11:24:17,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 297.0) internal successors, (594), 2 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:17,330 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 11:24:17,331 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 11:24:17,331 INFO L175 Difference]: Start difference. First operand has 273 places, 328 transitions, 674 flow. Second operand 2 states and 594 transitions. [2022-11-20 11:24:17,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 274 transitions, 574 flow [2022-11-20 11:24:17,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 274 transitions, 574 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:24:17,338 INFO L231 Difference]: Finished difference. Result has 270 places, 274 transitions, 566 flow [2022-11-20 11:24:17,338 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=269, 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=566, PETRI_PLACES=270, PETRI_TRANSITIONS=274} [2022-11-20 11:24:17,341 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, -3 predicate places. [2022-11-20 11:24:17,341 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 274 transitions, 566 flow [2022-11-20 11:24:17,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 271.5) internal successors, (543), 2 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:17,343 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:24:17,344 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] [2022-11-20 11:24:17,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 11:24:17,344 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-20 11:24:17,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:24:17,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1958084880, now seen corresponding path program 1 times [2022-11-20 11:24:17,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:24:17,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080146814] [2022-11-20 11:24:17,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:17,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:24:17,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:17,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:17,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:24:17,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080146814] [2022-11-20 11:24:17,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080146814] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:24:17,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:24:17,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:24:17,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060059393] [2022-11-20 11:24:17,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:24:17,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:24:17,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:24:17,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:24:17,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:24:17,392 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 328 [2022-11-20 11:24:17,393 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 274 transitions, 566 flow. Second operand has 3 states, 3 states have (on average 264.0) internal successors, (792), 3 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:17,393 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:24:17,393 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 328 [2022-11-20 11:24:17,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:24:17,520 INFO L130 PetriNetUnfolder]: 17/526 cut-off events. [2022-11-20 11:24:17,520 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-20 11:24:17,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 559 conditions, 526 events. 17/526 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2745 event pairs, 0 based on Foata normal form. 0/497 useless extension candidates. Maximal degree in co-relation 554. Up to 14 conditions per place. [2022-11-20 11:24:17,527 INFO L137 encePairwiseOnDemand]: 325/328 looper letters, 13 selfloop transitions, 2 changer transitions 0/278 dead transitions. [2022-11-20 11:24:17,527 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 278 transitions, 604 flow [2022-11-20 11:24:17,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:24:17,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:24:17,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 805 transitions. [2022-11-20 11:24:17,530 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.818089430894309 [2022-11-20 11:24:17,530 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 805 transitions. [2022-11-20 11:24:17,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 805 transitions. [2022-11-20 11:24:17,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:24:17,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 805 transitions. [2022-11-20 11:24:17,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 268.3333333333333) internal successors, (805), 3 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:17,534 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 11:24:17,535 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 11:24:17,535 INFO L175 Difference]: Start difference. First operand has 270 places, 274 transitions, 566 flow. Second operand 3 states and 805 transitions. [2022-11-20 11:24:17,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 278 transitions, 604 flow [2022-11-20 11:24:17,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 278 transitions, 604 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:24:17,546 INFO L231 Difference]: Finished difference. Result has 273 places, 275 transitions, 578 flow [2022-11-20 11:24:17,546 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=270, 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=578, PETRI_PLACES=273, PETRI_TRANSITIONS=275} [2022-11-20 11:24:17,549 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, 0 predicate places. [2022-11-20 11:24:17,549 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 275 transitions, 578 flow [2022-11-20 11:24:17,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 264.0) internal successors, (792), 3 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:17,549 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:24:17,549 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] [2022-11-20 11:24:17,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 11:24:17,550 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-20 11:24:17,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:24:17,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1150478808, now seen corresponding path program 1 times [2022-11-20 11:24:17,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:24:17,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408280221] [2022-11-20 11:24:17,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:17,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:24:17,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:17,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:17,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:24:17,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408280221] [2022-11-20 11:24:17,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408280221] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:24:17,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623345524] [2022-11-20 11:24:17,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:17,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:24:17,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:24:17,643 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:24:17,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:24:17,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:17,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:24:17,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:24:17,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:24:17,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:24:17,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623345524] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:24:17,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:24:17,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-20 11:24:17,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554067023] [2022-11-20 11:24:17,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:24:17,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:24:17,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:24:17,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:24:17,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:24:17,765 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 328 [2022-11-20 11:24:17,766 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 275 transitions, 578 flow. Second operand has 3 states, 3 states have (on average 264.0) internal successors, (792), 3 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:17,766 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:24:17,766 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 328 [2022-11-20 11:24:17,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:24:17,862 INFO L130 PetriNetUnfolder]: 13/427 cut-off events. [2022-11-20 11:24:17,862 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-11-20 11:24:17,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 470 conditions, 427 events. 13/427 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1983 event pairs, 0 based on Foata normal form. 0/405 useless extension candidates. Maximal degree in co-relation 463. Up to 16 conditions per place. [2022-11-20 11:24:17,870 INFO L137 encePairwiseOnDemand]: 325/328 looper letters, 13 selfloop transitions, 2 changer transitions 0/279 dead transitions. [2022-11-20 11:24:17,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 279 transitions, 616 flow [2022-11-20 11:24:17,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:24:17,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:24:17,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 805 transitions. [2022-11-20 11:24:17,874 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.818089430894309 [2022-11-20 11:24:17,874 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 805 transitions. [2022-11-20 11:24:17,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 805 transitions. [2022-11-20 11:24:17,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:24:17,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 805 transitions. [2022-11-20 11:24:17,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 268.3333333333333) internal successors, (805), 3 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:17,878 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 11:24:17,879 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 11:24:17,879 INFO L175 Difference]: Start difference. First operand has 273 places, 275 transitions, 578 flow. Second operand 3 states and 805 transitions. [2022-11-20 11:24:17,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 279 transitions, 616 flow [2022-11-20 11:24:17,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 279 transitions, 614 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:24:17,884 INFO L231 Difference]: Finished difference. Result has 275 places, 276 transitions, 588 flow [2022-11-20 11:24:17,885 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=588, PETRI_PLACES=275, PETRI_TRANSITIONS=276} [2022-11-20 11:24:17,887 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, 2 predicate places. [2022-11-20 11:24:17,888 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 276 transitions, 588 flow [2022-11-20 11:24:17,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 264.0) internal successors, (792), 3 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:17,888 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:24:17,888 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, 1, 1, 1] [2022-11-20 11:24:17,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:24:18,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:24:18,094 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-20 11:24:18,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:24:18,095 INFO L85 PathProgramCache]: Analyzing trace with hash -930708873, now seen corresponding path program 1 times [2022-11-20 11:24:18,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:24:18,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527230794] [2022-11-20 11:24:18,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:18,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:24:18,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:18,157 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 11:24:18,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:24:18,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527230794] [2022-11-20 11:24:18,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527230794] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:24:18,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112772629] [2022-11-20 11:24:18,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:18,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:24:18,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:24:18,159 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:24:18,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:24:18,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:18,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:24:18,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:24:18,296 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 11:24:18,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:24:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 11:24:18,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112772629] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:24:18,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:24:18,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:24:18,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655906510] [2022-11-20 11:24:18,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:24:18,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:24:18,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:24:18,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:24:18,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:24:18,330 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 328 [2022-11-20 11:24:18,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 276 transitions, 588 flow. Second operand has 10 states, 10 states have (on average 264.2) internal successors, (2642), 10 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:18,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:24:18,333 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 328 [2022-11-20 11:24:18,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:24:18,497 INFO L130 PetriNetUnfolder]: 13/434 cut-off events. [2022-11-20 11:24:18,497 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-20 11:24:18,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 489 conditions, 434 events. 13/434 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1978 event pairs, 0 based on Foata normal form. 2/416 useless extension candidates. Maximal degree in co-relation 481. Up to 11 conditions per place. [2022-11-20 11:24:18,505 INFO L137 encePairwiseOnDemand]: 322/328 looper letters, 14 selfloop transitions, 9 changer transitions 0/286 dead transitions. [2022-11-20 11:24:18,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 286 transitions, 656 flow [2022-11-20 11:24:18,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:24:18,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:24:18,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2383 transitions. [2022-11-20 11:24:18,511 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8072493224932249 [2022-11-20 11:24:18,511 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2383 transitions. [2022-11-20 11:24:18,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2383 transitions. [2022-11-20 11:24:18,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:24:18,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2383 transitions. [2022-11-20 11:24:18,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 264.77777777777777) internal successors, (2383), 9 states have internal predecessors, (2383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:18,522 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 11:24:18,524 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 11:24:18,524 INFO L175 Difference]: Start difference. First operand has 275 places, 276 transitions, 588 flow. Second operand 9 states and 2383 transitions. [2022-11-20 11:24:18,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 286 transitions, 656 flow [2022-11-20 11:24:18,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 286 transitions, 654 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:24:18,530 INFO L231 Difference]: Finished difference. Result has 285 places, 282 transitions, 636 flow [2022-11-20 11:24:18,530 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=636, PETRI_PLACES=285, PETRI_TRANSITIONS=282} [2022-11-20 11:24:18,531 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, 12 predicate places. [2022-11-20 11:24:18,531 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 282 transitions, 636 flow [2022-11-20 11:24:18,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 264.2) internal successors, (2642), 10 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:18,532 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:24:18,533 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 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] [2022-11-20 11:24:18,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:24:18,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 11:24:18,739 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-20 11:24:18,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:24:18,739 INFO L85 PathProgramCache]: Analyzing trace with hash 951543159, now seen corresponding path program 2 times [2022-11-20 11:24:18,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:24:18,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97038968] [2022-11-20 11:24:18,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:18,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:24:18,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:18,893 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 11:24:18,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:24:18,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97038968] [2022-11-20 11:24:18,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97038968] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:24:18,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053280517] [2022-11-20 11:24:18,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:24:18,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:24:18,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:24:18,896 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:24:18,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:24:19,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:24:19,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:24:19,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:24:19,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:24:19,065 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 11:24:19,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:24:19,178 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 11:24:19,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053280517] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:24:19,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:24:19,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 11:24:19,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070613474] [2022-11-20 11:24:19,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:24:19,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:24:19,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:24:19,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:24:19,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:24:19,188 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 328 [2022-11-20 11:24:19,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 282 transitions, 636 flow. Second operand has 18 states, 18 states have (on average 264.3333333333333) internal successors, (4758), 18 states have internal predecessors, (4758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:19,193 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:24:19,193 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 328 [2022-11-20 11:24:19,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:24:19,539 INFO L130 PetriNetUnfolder]: 13/454 cut-off events. [2022-11-20 11:24:19,539 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2022-11-20 11:24:19,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 454 events. 13/454 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1980 event pairs, 0 based on Foata normal form. 4/438 useless extension candidates. Maximal degree in co-relation 568. Up to 11 conditions per place. [2022-11-20 11:24:19,545 INFO L137 encePairwiseOnDemand]: 322/328 looper letters, 22 selfloop transitions, 21 changer transitions 0/306 dead transitions. [2022-11-20 11:24:19,545 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 306 transitions, 830 flow [2022-11-20 11:24:19,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:24:19,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 11:24:19,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5549 transitions. [2022-11-20 11:24:19,556 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8056039488966318 [2022-11-20 11:24:19,556 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5549 transitions. [2022-11-20 11:24:19,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5549 transitions. [2022-11-20 11:24:19,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:24:19,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5549 transitions. [2022-11-20 11:24:19,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 264.23809523809524) internal successors, (5549), 21 states have internal predecessors, (5549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:19,580 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 11:24:19,583 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 11:24:19,583 INFO L175 Difference]: Start difference. First operand has 285 places, 282 transitions, 636 flow. Second operand 21 states and 5549 transitions. [2022-11-20 11:24:19,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 306 transitions, 830 flow [2022-11-20 11:24:19,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 306 transitions, 816 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 11:24:19,591 INFO L231 Difference]: Finished difference. Result has 309 places, 295 transitions, 760 flow [2022-11-20 11:24:19,591 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=630, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=760, PETRI_PLACES=309, PETRI_TRANSITIONS=295} [2022-11-20 11:24:19,592 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, 36 predicate places. [2022-11-20 11:24:19,592 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 295 transitions, 760 flow [2022-11-20 11:24:19,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 264.3333333333333) internal successors, (4758), 18 states have internal predecessors, (4758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:19,594 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:24:19,594 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 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] [2022-11-20 11:24:19,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:24:19,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:24:19,800 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-20 11:24:19,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:24:19,801 INFO L85 PathProgramCache]: Analyzing trace with hash 290057079, now seen corresponding path program 3 times [2022-11-20 11:24:19,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:24:19,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656005240] [2022-11-20 11:24:19,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:19,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:24:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:20,132 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 11:24:20,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:24:20,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656005240] [2022-11-20 11:24:20,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656005240] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:24:20,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973547489] [2022-11-20 11:24:20,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:24:20,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:24:20,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:24:20,135 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:24:20,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:24:20,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-20 11:24:20,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:24:20,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:24:20,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:24:20,432 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 11:24:20,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:24:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 11:24:20,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973547489] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:24:20,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:24:20,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-11-20 11:24:20,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432587165] [2022-11-20 11:24:20,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:24:20,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 11:24:20,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:24:20,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 11:24:20,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-11-20 11:24:20,673 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 328 [2022-11-20 11:24:20,709 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 295 transitions, 760 flow. Second operand has 23 states, 23 states have (on average 264.4782608695652) internal successors, (6083), 23 states have internal predecessors, (6083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:20,709 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:24:20,709 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 328 [2022-11-20 11:24:20,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:24:21,177 INFO L130 PetriNetUnfolder]: 13/469 cut-off events. [2022-11-20 11:24:21,177 INFO L131 PetriNetUnfolder]: For 126/126 co-relation queries the response was YES. [2022-11-20 11:24:21,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 679 conditions, 469 events. 13/469 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1978 event pairs, 0 based on Foata normal form. 3/452 useless extension candidates. Maximal degree in co-relation 664. Up to 17 conditions per place. [2022-11-20 11:24:21,186 INFO L137 encePairwiseOnDemand]: 322/328 looper letters, 28 selfloop transitions, 30 changer transitions 0/321 dead transitions. [2022-11-20 11:24:21,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 321 transitions, 1022 flow [2022-11-20 11:24:21,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-20 11:24:21,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-20 11:24:21,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 7921 transitions. [2022-11-20 11:24:21,198 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8049796747967479 [2022-11-20 11:24:21,198 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 7921 transitions. [2022-11-20 11:24:21,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 7921 transitions. [2022-11-20 11:24:21,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:24:21,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 7921 transitions. [2022-11-20 11:24:21,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 264.03333333333336) internal successors, (7921), 30 states have internal predecessors, (7921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:21,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 328.0) internal successors, (10168), 31 states have internal predecessors, (10168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:21,234 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 328.0) internal successors, (10168), 31 states have internal predecessors, (10168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:21,234 INFO L175 Difference]: Start difference. First operand has 309 places, 295 transitions, 760 flow. Second operand 30 states and 7921 transitions. [2022-11-20 11:24:21,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 321 transitions, 1022 flow [2022-11-20 11:24:21,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 321 transitions, 992 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-11-20 11:24:21,242 INFO L231 Difference]: Finished difference. Result has 336 places, 305 transitions, 888 flow [2022-11-20 11:24:21,243 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=888, PETRI_PLACES=336, PETRI_TRANSITIONS=305} [2022-11-20 11:24:21,244 INFO L288 CegarLoopForPetriNet]: 273 programPoint places, 63 predicate places. [2022-11-20 11:24:21,244 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 305 transitions, 888 flow [2022-11-20 11:24:21,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 264.4782608695652) internal successors, (6083), 23 states have internal predecessors, (6083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:21,246 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:24:21,246 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 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] [2022-11-20 11:24:21,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-20 11:24:21,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:24:21,455 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-20 11:24:21,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:24:21,455 INFO L85 PathProgramCache]: Analyzing trace with hash 686461615, now seen corresponding path program 4 times [2022-11-20 11:24:21,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:24:21,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038715793] [2022-11-20 11:24:21,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:21,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:24:21,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:24:21,506 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:24:21,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:24:21,556 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:24:21,557 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:24:21,557 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-20 11:24:21,557 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-20 11:24:21,557 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-11-20 11:24:21,557 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-20 11:24:21,558 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-20 11:24:21,558 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-20 11:24:21,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 11:24:21,559 INFO L444 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2022-11-20 11:24:21,560 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:24:21,561 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-20 11:24:21,627 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-20 11:24:21,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 333 places, 401 transitions, 832 flow [2022-11-20 11:24:21,863 INFO L130 PetriNetUnfolder]: 168/901 cut-off events. [2022-11-20 11:24:21,863 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-20 11:24:21,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 929 conditions, 901 events. 168/901 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4919 event pairs, 1 based on Foata normal form. 0/718 useless extension candidates. Maximal degree in co-relation 639. Up to 16 conditions per place. [2022-11-20 11:24:21,881 INFO L82 GeneralOperation]: Start removeDead. Operand has 333 places, 401 transitions, 832 flow [2022-11-20 11:24:21,899 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 333 places, 401 transitions, 832 flow [2022-11-20 11:24:21,900 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:24:21,901 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;@68fae2aa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:24:21,901 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-20 11:24:21,921 INFO L130 PetriNetUnfolder]: 21/187 cut-off events. [2022-11-20 11:24:21,922 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 11:24:21,922 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:24:21,922 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] [2022-11-20 11:24:21,922 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 11:24:21,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:24:21,923 INFO L85 PathProgramCache]: Analyzing trace with hash 490789389, now seen corresponding path program 1 times [2022-11-20 11:24:21,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:24:21,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647904605] [2022-11-20 11:24:21,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:21,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:24:21,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:21,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:21,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:24:21,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647904605] [2022-11-20 11:24:21,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647904605] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:24:21,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:24:21,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:24:21,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996993860] [2022-11-20 11:24:21,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:24:21,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:24:21,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:24:21,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:24:21,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:24:21,952 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 401 [2022-11-20 11:24:21,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 401 transitions, 832 flow. Second operand has 2 states, 2 states have (on average 329.5) internal successors, (659), 2 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:21,954 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:24:21,954 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 401 [2022-11-20 11:24:21,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:24:22,155 INFO L130 PetriNetUnfolder]: 27/749 cut-off events. [2022-11-20 11:24:22,155 INFO L131 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-11-20 11:24:22,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 793 conditions, 749 events. 27/749 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4225 event pairs, 1 based on Foata normal form. 256/963 useless extension candidates. Maximal degree in co-relation 536. Up to 16 conditions per place. [2022-11-20 11:24:22,173 INFO L137 encePairwiseOnDemand]: 339/401 looper letters, 6 selfloop transitions, 0 changer transitions 0/334 dead transitions. [2022-11-20 11:24:22,173 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 334 transitions, 710 flow [2022-11-20 11:24:22,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:24:22,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:24:22,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 724 transitions. [2022-11-20 11:24:22,175 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9027431421446384 [2022-11-20 11:24:22,175 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 724 transitions. [2022-11-20 11:24:22,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 724 transitions. [2022-11-20 11:24:22,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:24:22,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 724 transitions. [2022-11-20 11:24:22,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 362.0) internal successors, (724), 2 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:22,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 401.0) internal successors, (1203), 3 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:22,179 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 401.0) internal successors, (1203), 3 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:22,180 INFO L175 Difference]: Start difference. First operand has 333 places, 401 transitions, 832 flow. Second operand 2 states and 724 transitions. [2022-11-20 11:24:22,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 334 transitions, 710 flow [2022-11-20 11:24:22,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 334 transitions, 710 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:24:22,186 INFO L231 Difference]: Finished difference. Result has 329 places, 334 transitions, 698 flow [2022-11-20 11:24:22,187 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=698, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=698, PETRI_PLACES=329, PETRI_TRANSITIONS=334} [2022-11-20 11:24:22,188 INFO L288 CegarLoopForPetriNet]: 333 programPoint places, -4 predicate places. [2022-11-20 11:24:22,188 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 334 transitions, 698 flow [2022-11-20 11:24:22,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 329.5) internal successors, (659), 2 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:22,189 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:24:22,189 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] [2022-11-20 11:24:22,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 11:24:22,189 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 11:24:22,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:24:22,190 INFO L85 PathProgramCache]: Analyzing trace with hash -731965488, now seen corresponding path program 1 times [2022-11-20 11:24:22,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:24:22,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395298701] [2022-11-20 11:24:22,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:22,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:24:22,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:22,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:22,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:24:22,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395298701] [2022-11-20 11:24:22,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395298701] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:24:22,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:24:22,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:24:22,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82326] [2022-11-20 11:24:22,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:24:22,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:24:22,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:24:22,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:24:22,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:24:22,233 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 401 [2022-11-20 11:24:22,234 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 334 transitions, 698 flow. Second operand has 3 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:22,234 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:24:22,234 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 401 [2022-11-20 11:24:22,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:24:22,423 INFO L130 PetriNetUnfolder]: 27/753 cut-off events. [2022-11-20 11:24:22,423 INFO L131 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-11-20 11:24:22,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 809 conditions, 753 events. 27/753 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4235 event pairs, 1 based on Foata normal form. 0/711 useless extension candidates. Maximal degree in co-relation 803. Up to 23 conditions per place. [2022-11-20 11:24:22,438 INFO L137 encePairwiseOnDemand]: 398/401 looper letters, 15 selfloop transitions, 2 changer transitions 0/338 dead transitions. [2022-11-20 11:24:22,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 338 transitions, 740 flow [2022-11-20 11:24:22,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:24:22,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:24:22,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 981 transitions. [2022-11-20 11:24:22,444 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8154613466334164 [2022-11-20 11:24:22,444 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 981 transitions. [2022-11-20 11:24:22,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 981 transitions. [2022-11-20 11:24:22,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:24:22,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 981 transitions. [2022-11-20 11:24:22,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 327.0) internal successors, (981), 3 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:22,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:22,450 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:22,450 INFO L175 Difference]: Start difference. First operand has 329 places, 334 transitions, 698 flow. Second operand 3 states and 981 transitions. [2022-11-20 11:24:22,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 338 transitions, 740 flow [2022-11-20 11:24:22,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 338 transitions, 740 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:24:22,457 INFO L231 Difference]: Finished difference. Result has 332 places, 335 transitions, 710 flow [2022-11-20 11:24:22,458 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=698, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=710, PETRI_PLACES=332, PETRI_TRANSITIONS=335} [2022-11-20 11:24:22,459 INFO L288 CegarLoopForPetriNet]: 333 programPoint places, -1 predicate places. [2022-11-20 11:24:22,459 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 335 transitions, 710 flow [2022-11-20 11:24:22,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:22,460 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:24:22,460 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] [2022-11-20 11:24:22,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 11:24:22,460 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 11:24:22,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:24:22,461 INFO L85 PathProgramCache]: Analyzing trace with hash 798570601, now seen corresponding path program 1 times [2022-11-20 11:24:22,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:24:22,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724209722] [2022-11-20 11:24:22,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:22,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:24:22,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:22,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:22,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:24:22,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724209722] [2022-11-20 11:24:22,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724209722] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:24:22,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997347025] [2022-11-20 11:24:22,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:22,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:24:22,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:24:22,529 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:24:22,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:24:22,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:22,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:24:22,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:24:22,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:24:22,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:24:22,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997347025] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:24:22,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:24:22,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-20 11:24:22,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22510990] [2022-11-20 11:24:22,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:24:22,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:24:22,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:24:22,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:24:22,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:24:22,659 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 401 [2022-11-20 11:24:22,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 335 transitions, 710 flow. Second operand has 3 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:22,660 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:24:22,660 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 401 [2022-11-20 11:24:22,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:24:22,831 INFO L130 PetriNetUnfolder]: 23/654 cut-off events. [2022-11-20 11:24:22,831 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2022-11-20 11:24:22,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 725 conditions, 654 events. 23/654 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3491 event pairs, 1 based on Foata normal form. 0/619 useless extension candidates. Maximal degree in co-relation 717. Up to 30 conditions per place. [2022-11-20 11:24:22,849 INFO L137 encePairwiseOnDemand]: 398/401 looper letters, 15 selfloop transitions, 2 changer transitions 0/339 dead transitions. [2022-11-20 11:24:22,849 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 339 transitions, 752 flow [2022-11-20 11:24:22,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:24:22,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:24:22,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 981 transitions. [2022-11-20 11:24:22,851 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8154613466334164 [2022-11-20 11:24:22,852 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 981 transitions. [2022-11-20 11:24:22,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 981 transitions. [2022-11-20 11:24:22,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:24:22,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 981 transitions. [2022-11-20 11:24:22,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 327.0) internal successors, (981), 3 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:22,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:22,858 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:22,858 INFO L175 Difference]: Start difference. First operand has 332 places, 335 transitions, 710 flow. Second operand 3 states and 981 transitions. [2022-11-20 11:24:22,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 339 transitions, 752 flow [2022-11-20 11:24:22,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 339 transitions, 750 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:24:22,865 INFO L231 Difference]: Finished difference. Result has 334 places, 336 transitions, 720 flow [2022-11-20 11:24:22,866 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=720, PETRI_PLACES=334, PETRI_TRANSITIONS=336} [2022-11-20 11:24:22,867 INFO L288 CegarLoopForPetriNet]: 333 programPoint places, 1 predicate places. [2022-11-20 11:24:22,868 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 336 transitions, 720 flow [2022-11-20 11:24:22,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:22,868 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:24:22,869 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] [2022-11-20 11:24:22,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 11:24:23,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 11:24:23,079 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 11:24:23,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:24:23,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1599524314, now seen corresponding path program 1 times [2022-11-20 11:24:23,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:24:23,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397853325] [2022-11-20 11:24:23,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:23,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:24:23,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:23,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:24:23,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:24:23,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397853325] [2022-11-20 11:24:23,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397853325] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:24:23,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455848315] [2022-11-20 11:24:23,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:23,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:24:23,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:24:23,146 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:24:23,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 11:24:23,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:23,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:24:23,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:24:23,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:24:23,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:24:23,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455848315] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:24:23,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:24:23,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-20 11:24:23,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802280487] [2022-11-20 11:24:23,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:24:23,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:24:23,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:24:23,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:24:23,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:24:23,295 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 401 [2022-11-20 11:24:23,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 336 transitions, 720 flow. Second operand has 3 states, 3 states have (on average 321.6666666666667) internal successors, (965), 3 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:23,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:24:23,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 401 [2022-11-20 11:24:23,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:24:23,532 INFO L130 PetriNetUnfolder]: 26/807 cut-off events. [2022-11-20 11:24:23,532 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-20 11:24:23,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 899 conditions, 807 events. 26/807 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 4009 event pairs, 1 based on Foata normal form. 0/769 useless extension candidates. Maximal degree in co-relation 890. Up to 36 conditions per place. [2022-11-20 11:24:23,553 INFO L137 encePairwiseOnDemand]: 398/401 looper letters, 16 selfloop transitions, 2 changer transitions 0/340 dead transitions. [2022-11-20 11:24:23,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 340 transitions, 764 flow [2022-11-20 11:24:23,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:24:23,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:24:23,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 979 transitions. [2022-11-20 11:24:23,555 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8137988362427265 [2022-11-20 11:24:23,556 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 979 transitions. [2022-11-20 11:24:23,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 979 transitions. [2022-11-20 11:24:23,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:24:23,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 979 transitions. [2022-11-20 11:24:23,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 326.3333333333333) internal successors, (979), 3 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:23,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:23,561 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:23,561 INFO L175 Difference]: Start difference. First operand has 334 places, 336 transitions, 720 flow. Second operand 3 states and 979 transitions. [2022-11-20 11:24:23,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 340 transitions, 764 flow [2022-11-20 11:24:23,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 340 transitions, 762 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:24:23,568 INFO L231 Difference]: Finished difference. Result has 336 places, 337 transitions, 730 flow [2022-11-20 11:24:23,569 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=718, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=730, PETRI_PLACES=336, PETRI_TRANSITIONS=337} [2022-11-20 11:24:23,570 INFO L288 CegarLoopForPetriNet]: 333 programPoint places, 3 predicate places. [2022-11-20 11:24:23,570 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 337 transitions, 730 flow [2022-11-20 11:24:23,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 321.6666666666667) internal successors, (965), 3 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:23,571 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:24:23,571 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] [2022-11-20 11:24:23,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 11:24:23,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 11:24:23,777 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 11:24:23,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:24:23,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1194190247, now seen corresponding path program 1 times [2022-11-20 11:24:23,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:24:23,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991473567] [2022-11-20 11:24:23,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:23,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:24:23,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:23,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:24:23,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991473567] [2022-11-20 11:24:23,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991473567] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:24:23,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136931105] [2022-11-20 11:24:23,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:23,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:24:23,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:24:23,839 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:24:23,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 11:24:23,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:23,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:24:23,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:24:23,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:23,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:24:24,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:24,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136931105] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:24:24,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:24:24,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:24:24,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599944887] [2022-11-20 11:24:24,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:24:24,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:24:24,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:24:24,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:24:24,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:24:24,038 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 401 [2022-11-20 11:24:24,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 337 transitions, 730 flow. Second operand has 10 states, 10 states have (on average 322.1) internal successors, (3221), 10 states have internal predecessors, (3221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:24,042 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:24:24,042 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 401 [2022-11-20 11:24:24,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:24:24,364 INFO L130 PetriNetUnfolder]: 26/814 cut-off events. [2022-11-20 11:24:24,365 INFO L131 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2022-11-20 11:24:24,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 814 events. 26/814 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 3982 event pairs, 1 based on Foata normal form. 2/781 useless extension candidates. Maximal degree in co-relation 899. Up to 20 conditions per place. [2022-11-20 11:24:24,384 INFO L137 encePairwiseOnDemand]: 395/401 looper letters, 16 selfloop transitions, 9 changer transitions 0/347 dead transitions. [2022-11-20 11:24:24,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 347 transitions, 802 flow [2022-11-20 11:24:24,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:24:24,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:24:24,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2907 transitions. [2022-11-20 11:24:24,389 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8054862842892768 [2022-11-20 11:24:24,389 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2907 transitions. [2022-11-20 11:24:24,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2907 transitions. [2022-11-20 11:24:24,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:24:24,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2907 transitions. [2022-11-20 11:24:24,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 323.0) internal successors, (2907), 9 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:24,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 401.0) internal successors, (4010), 10 states have internal predecessors, (4010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:24,405 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 401.0) internal successors, (4010), 10 states have internal predecessors, (4010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:24,405 INFO L175 Difference]: Start difference. First operand has 336 places, 337 transitions, 730 flow. Second operand 9 states and 2907 transitions. [2022-11-20 11:24:24,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 347 transitions, 802 flow [2022-11-20 11:24:24,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 347 transitions, 800 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:24:24,412 INFO L231 Difference]: Finished difference. Result has 346 places, 343 transitions, 778 flow [2022-11-20 11:24:24,413 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=778, PETRI_PLACES=346, PETRI_TRANSITIONS=343} [2022-11-20 11:24:24,413 INFO L288 CegarLoopForPetriNet]: 333 programPoint places, 13 predicate places. [2022-11-20 11:24:24,413 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 343 transitions, 778 flow [2022-11-20 11:24:24,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 322.1) internal successors, (3221), 10 states have internal predecessors, (3221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:24,415 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:24:24,415 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 11:24:24,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 11:24:24,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 11:24:24,621 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 11:24:24,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:24:24,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1855352505, now seen corresponding path program 2 times [2022-11-20 11:24:24,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:24:24,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099498711] [2022-11-20 11:24:24,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:24,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:24:24,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:24,740 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:24,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:24:24,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099498711] [2022-11-20 11:24:24,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099498711] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:24:24,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312414553] [2022-11-20 11:24:24,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:24:24,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:24:24,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:24:24,743 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:24:24,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa470c12-ba19-4a1e-8e06-2625e16c8e4a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 11:24:24,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:24:24,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:24:24,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:24:24,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:24:24,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-20 11:24:25,100 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:24:25,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 11:24:25,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-20 11:24:25,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 11:24:25,321 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 11:24:25,322 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:24:25,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312414553] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:24:25,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:24:25,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [9] total 19 [2022-11-20 11:24:25,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176607162] [2022-11-20 11:24:25,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:24:25,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:24:25,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:24:25,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:24:25,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:24:25,327 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 401 [2022-11-20 11:24:25,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 343 transitions, 778 flow. Second operand has 12 states, 12 states have (on average 268.3333333333333) internal successors, (3220), 12 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:25,330 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:24:25,330 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 401 [2022-11-20 11:24:25,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand