./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8 --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 3c0354ee6107efc04d15102ecf9eef73430e38e14b70f16419cd07cd733fd0df --- 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-2329fc7 [2022-12-13 14:58:07,600 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 14:58:07,601 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 14:58:07,615 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 14:58:07,615 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 14:58:07,616 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 14:58:07,617 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 14:58:07,618 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 14:58:07,619 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 14:58:07,619 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 14:58:07,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 14:58:07,621 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 14:58:07,621 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 14:58:07,622 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 14:58:07,622 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 14:58:07,623 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 14:58:07,624 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 14:58:07,625 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 14:58:07,626 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 14:58:07,627 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 14:58:07,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 14:58:07,629 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 14:58:07,630 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 14:58:07,630 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 14:58:07,633 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 14:58:07,633 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 14:58:07,633 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 14:58:07,634 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 14:58:07,634 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 14:58:07,635 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 14:58:07,635 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 14:58:07,636 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 14:58:07,636 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 14:58:07,637 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 14:58:07,637 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 14:58:07,638 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 14:58:07,638 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 14:58:07,638 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 14:58:07,638 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 14:58:07,639 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 14:58:07,639 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 14:58:07,640 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 14:58:07,654 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 14:58:07,655 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 14:58:07,655 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 14:58:07,655 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 14:58:07,655 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 14:58:07,655 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 14:58:07,656 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 14:58:07,656 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 14:58:07,656 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 14:58:07,656 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 14:58:07,656 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 14:58:07,657 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 14:58:07,657 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 14:58:07,657 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 14:58:07,657 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 14:58:07,657 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 14:58:07,657 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 14:58:07,657 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 14:58:07,657 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 14:58:07,657 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 14:58:07,658 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 14:58:07,658 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 14:58:07,658 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 14:58:07,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 14:58:07,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:58:07,658 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 14:58:07,658 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 14:58:07,658 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 14:58:07,659 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 14:58:07,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 14:58:07,659 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 14:58:07,659 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 14:58:07,659 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 14:58:07,659 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 14:58:07,659 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 14:58:07,659 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c0354ee6107efc04d15102ecf9eef73430e38e14b70f16419cd07cd733fd0df [2022-12-13 14:58:07,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 14:58:07,837 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 14:58:07,839 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 14:58:07,840 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 14:58:07,840 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 14:58:07,841 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2022-12-13 14:58:10,380 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 14:58:10,541 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 14:58:10,542 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2022-12-13 14:58:10,551 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/data/334db9b03/55f957ca288b4cecbd7c09799b275921/FLAG32960e6d7 [2022-12-13 14:58:10,561 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/data/334db9b03/55f957ca288b4cecbd7c09799b275921 [2022-12-13 14:58:10,563 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 14:58:10,564 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 14:58:10,565 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 14:58:10,565 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 14:58:10,568 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 14:58:10,568 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:58:10" (1/1) ... [2022-12-13 14:58:10,569 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e837681 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:58:10, skipping insertion in model container [2022-12-13 14:58:10,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:58:10" (1/1) ... [2022-12-13 14:58:10,574 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 14:58:10,604 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 14:58:10,898 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_487c8397-508d-48fa-942e-52cbdd9890dd/sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i[41323,41336] [2022-12-13 14:58:10,917 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:58:10,929 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 14:58:10,954 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_487c8397-508d-48fa-942e-52cbdd9890dd/sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i[41323,41336] [2022-12-13 14:58:10,963 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:58:11,017 INFO L208 MainTranslator]: Completed translation [2022-12-13 14:58:11,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:58:11 WrapperNode [2022-12-13 14:58:11,017 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 14:58:11,018 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 14:58:11,018 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 14:58:11,018 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 14:58:11,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:58:11" (1/1) ... [2022-12-13 14:58:11,046 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:58:11" (1/1) ... [2022-12-13 14:58:11,071 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 186 [2022-12-13 14:58:11,072 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 14:58:11,073 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 14:58:11,073 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 14:58:11,073 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 14:58:11,082 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:58:11" (1/1) ... [2022-12-13 14:58:11,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:58:11" (1/1) ... [2022-12-13 14:58:11,087 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:58:11" (1/1) ... [2022-12-13 14:58:11,087 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:58:11" (1/1) ... [2022-12-13 14:58:11,095 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:58:11" (1/1) ... [2022-12-13 14:58:11,101 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:58:11" (1/1) ... [2022-12-13 14:58:11,103 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:58:11" (1/1) ... [2022-12-13 14:58:11,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:58:11" (1/1) ... [2022-12-13 14:58:11,107 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 14:58:11,108 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 14:58:11,108 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 14:58:11,109 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 14:58:11,109 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:58:11" (1/1) ... [2022-12-13 14:58:11,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:58:11,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:58:11,137 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 14:58:11,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 14:58:11,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 14:58:11,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 14:58:11,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 14:58:11,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 14:58:11,172 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 14:58:11,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 14:58:11,173 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 14:58:11,173 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 14:58:11,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 14:58:11,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 14:58:11,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 14:58:11,175 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 14:58:11,285 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 14:58:11,287 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 14:58:11,517 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 14:58:11,526 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 14:58:11,526 INFO L300 CfgBuilder]: Removed 23 assume(true) statements. [2022-12-13 14:58:11,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:58:11 BoogieIcfgContainer [2022-12-13 14:58:11,529 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 14:58:11,532 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 14:58:11,532 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 14:58:11,535 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 14:58:11,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 02:58:10" (1/3) ... [2022-12-13 14:58:11,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78b44e0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:58:11, skipping insertion in model container [2022-12-13 14:58:11,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:58:11" (2/3) ... [2022-12-13 14:58:11,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78b44e0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:58:11, skipping insertion in model container [2022-12-13 14:58:11,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:58:11" (3/3) ... [2022-12-13 14:58:11,538 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_75-tricky_address2_racefree.i [2022-12-13 14:58:11,546 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 14:58:11,557 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 14:58:11,558 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-13 14:58:11,558 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 14:58:11,620 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-13 14:58:11,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 197 transitions, 402 flow [2022-12-13 14:58:11,729 INFO L130 PetriNetUnfolder]: 45/269 cut-off events. [2022-12-13 14:58:11,729 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-12-13 14:58:11,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 269 events. 45/269 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 853 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 147. Up to 8 conditions per place. [2022-12-13 14:58:11,735 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 197 transitions, 402 flow [2022-12-13 14:58:11,739 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 192 transitions, 389 flow [2022-12-13 14:58:11,742 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:58:11,750 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 165 places, 192 transitions, 389 flow [2022-12-13 14:58:11,752 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 165 places, 192 transitions, 389 flow [2022-12-13 14:58:11,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 192 transitions, 389 flow [2022-12-13 14:58:11,785 INFO L130 PetriNetUnfolder]: 44/264 cut-off events. [2022-12-13 14:58:11,785 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:58:11,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 264 events. 44/264 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 820 event pairs, 0 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 147. Up to 8 conditions per place. [2022-12-13 14:58:11,789 INFO L119 LiptonReduction]: Number of co-enabled transitions 10920 [2022-12-13 14:58:13,865 INFO L134 LiptonReduction]: Checked pairs total: 17377 [2022-12-13 14:58:13,865 INFO L136 LiptonReduction]: Total number of compositions: 162 [2022-12-13 14:58:13,876 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:58:13,880 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;@65cd0a01, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:58:13,880 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-13 14:58:13,883 INFO L130 PetriNetUnfolder]: 7/25 cut-off events. [2022-12-13 14:58:13,884 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:58:13,884 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:58:13,884 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 14:58:13,885 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 14:58:13,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:58:13,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1509455897, now seen corresponding path program 1 times [2022-12-13 14:58:13,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:58:13,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848276603] [2022-12-13 14:58:13,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:58:13,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:58:13,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:58:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:58:14,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:58:14,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848276603] [2022-12-13 14:58:14,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848276603] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:58:14,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:58:14,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:58:14,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630687439] [2022-12-13 14:58:14,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:58:14,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:58:14,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:58:14,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:58:14,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:58:14,098 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 359 [2022-12-13 14:58:14,101 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 66 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:14,102 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:58:14,102 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 359 [2022-12-13 14:58:14,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:58:14,225 INFO L130 PetriNetUnfolder]: 322/705 cut-off events. [2022-12-13 14:58:14,225 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:58:14,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1339 conditions, 705 events. 322/705 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3462 event pairs, 285 based on Foata normal form. 91/682 useless extension candidates. Maximal degree in co-relation 1281. Up to 627 conditions per place. [2022-12-13 14:58:14,228 INFO L137 encePairwiseOnDemand]: 335/359 looper letters, 37 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2022-12-13 14:58:14,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 46 transitions, 175 flow [2022-12-13 14:58:14,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:58:14,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:58:14,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 547 transitions. [2022-12-13 14:58:14,239 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5078922934076138 [2022-12-13 14:58:14,239 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 547 transitions. [2022-12-13 14:58:14,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 547 transitions. [2022-12-13 14:58:14,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:58:14,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 547 transitions. [2022-12-13 14:58:14,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:14,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:14,257 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:14,259 INFO L175 Difference]: Start difference. First operand has 45 places, 66 transitions, 137 flow. Second operand 3 states and 547 transitions. [2022-12-13 14:58:14,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 46 transitions, 175 flow [2022-12-13 14:58:14,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 46 transitions, 175 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 14:58:14,262 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 107 flow [2022-12-13 14:58:14,263 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2022-12-13 14:58:14,266 INFO L288 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2022-12-13 14:58:14,266 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 107 flow [2022-12-13 14:58:14,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:14,267 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:58:14,267 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:58:14,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 14:58:14,267 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 14:58:14,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:58:14,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1191534850, now seen corresponding path program 1 times [2022-12-13 14:58:14,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:58:14,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477174857] [2022-12-13 14:58:14,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:58:14,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:58:14,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:58:14,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:58:14,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:58:14,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477174857] [2022-12-13 14:58:14,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477174857] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:58:14,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617889248] [2022-12-13 14:58:14,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:58:14,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:58:14,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:58:14,339 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:58:14,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 14:58:14,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:58:14,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 14:58:14,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:58:14,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:58:14,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:58:14,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617889248] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:58:14,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:58:14,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 14:58:14,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001657862] [2022-12-13 14:58:14,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:58:14,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:58:14,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:58:14,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:58:14,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:58:14,428 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 359 [2022-12-13 14:58:14,429 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:14,429 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:58:14,429 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 359 [2022-12-13 14:58:14,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:58:14,559 INFO L130 PetriNetUnfolder]: 321/695 cut-off events. [2022-12-13 14:58:14,559 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:58:14,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1326 conditions, 695 events. 321/695 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3435 event pairs, 126 based on Foata normal form. 0/589 useless extension candidates. Maximal degree in co-relation 1314. Up to 593 conditions per place. [2022-12-13 14:58:14,562 INFO L137 encePairwiseOnDemand]: 356/359 looper letters, 53 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2022-12-13 14:58:14,562 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 62 transitions, 249 flow [2022-12-13 14:58:14,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:58:14,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:58:14,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 541 transitions. [2022-12-13 14:58:14,566 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5023212627669452 [2022-12-13 14:58:14,566 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 541 transitions. [2022-12-13 14:58:14,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 541 transitions. [2022-12-13 14:58:14,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:58:14,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 541 transitions. [2022-12-13 14:58:14,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:14,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:14,572 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:14,572 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 107 flow. Second operand 3 states and 541 transitions. [2022-12-13 14:58:14,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 62 transitions, 249 flow [2022-12-13 14:58:14,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 62 transitions, 245 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 14:58:14,574 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 111 flow [2022-12-13 14:58:14,575 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2022-12-13 14:58:14,575 INFO L288 CegarLoopForPetriNet]: 45 programPoint places, 5 predicate places. [2022-12-13 14:58:14,576 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 111 flow [2022-12-13 14:58:14,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:14,576 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:58:14,576 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-12-13 14:58:14,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 14:58:14,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:58:14,778 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 14:58:14,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:58:14,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1691969618, now seen corresponding path program 1 times [2022-12-13 14:58:14,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:58:14,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360235554] [2022-12-13 14:58:14,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:58:14,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:58:14,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:58:14,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 14:58:14,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:58:14,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360235554] [2022-12-13 14:58:14,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360235554] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:58:14,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508412965] [2022-12-13 14:58:14,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:58:14,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:58:14,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:58:14,853 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:58:14,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 14:58:14,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:58:14,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 14:58:14,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:58:14,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 14:58:14,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:58:14,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 14:58:14,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508412965] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:58:14,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:58:14,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 14:58:14,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210320809] [2022-12-13 14:58:14,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:58:14,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 14:58:14,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:58:14,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 14:58:14,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:58:14,975 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 359 [2022-12-13 14:58:14,976 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 111 flow. Second operand has 7 states, 7 states have (on average 162.57142857142858) internal successors, (1138), 7 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:14,976 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:58:14,976 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 359 [2022-12-13 14:58:14,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:58:15,119 INFO L130 PetriNetUnfolder]: 320/687 cut-off events. [2022-12-13 14:58:15,119 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2022-12-13 14:58:15,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1365 conditions, 687 events. 320/687 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3275 event pairs, 285 based on Foata normal form. 3/596 useless extension candidates. Maximal degree in co-relation 1338. Up to 610 conditions per place. [2022-12-13 14:58:15,121 INFO L137 encePairwiseOnDemand]: 356/359 looper letters, 37 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2022-12-13 14:58:15,121 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 49 transitions, 207 flow [2022-12-13 14:58:15,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:58:15,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 14:58:15,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1011 transitions. [2022-12-13 14:58:15,124 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46935933147632314 [2022-12-13 14:58:15,124 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1011 transitions. [2022-12-13 14:58:15,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1011 transitions. [2022-12-13 14:58:15,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:58:15,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1011 transitions. [2022-12-13 14:58:15,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 168.5) internal successors, (1011), 6 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:15,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 359.0) internal successors, (2513), 7 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:15,130 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 359.0) internal successors, (2513), 7 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:15,130 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 111 flow. Second operand 6 states and 1011 transitions. [2022-12-13 14:58:15,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 49 transitions, 207 flow [2022-12-13 14:58:15,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 49 transitions, 203 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 14:58:15,131 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 143 flow [2022-12-13 14:58:15,132 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=143, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2022-12-13 14:58:15,132 INFO L288 CegarLoopForPetriNet]: 45 programPoint places, 11 predicate places. [2022-12-13 14:58:15,132 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 143 flow [2022-12-13 14:58:15,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 162.57142857142858) internal successors, (1138), 7 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:15,133 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:58:15,133 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2022-12-13 14:58:15,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-13 14:58:15,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:58:15,334 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 14:58:15,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:58:15,334 INFO L85 PathProgramCache]: Analyzing trace with hash 2037631319, now seen corresponding path program 2 times [2022-12-13 14:58:15,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:58:15,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431538426] [2022-12-13 14:58:15,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:58:15,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:58:15,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:58:15,417 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 14:58:15,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:58:15,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431538426] [2022-12-13 14:58:15,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431538426] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:58:15,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781135489] [2022-12-13 14:58:15,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:58:15,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:58:15,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:58:15,419 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:58:15,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 14:58:15,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:58:15,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:58:15,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 14:58:15,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:58:15,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 14:58:15,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:58:15,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 14:58:15,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781135489] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:58:15,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:58:15,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 14:58:15,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378335611] [2022-12-13 14:58:15,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:58:15,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 14:58:15,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:58:15,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 14:58:15,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 14:58:15,567 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 359 [2022-12-13 14:58:15,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 143 flow. Second operand has 13 states, 13 states have (on average 162.30769230769232) internal successors, (2110), 13 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:15,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:58:15,571 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 359 [2022-12-13 14:58:15,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:58:15,728 INFO L130 PetriNetUnfolder]: 320/693 cut-off events. [2022-12-13 14:58:15,728 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-12-13 14:58:15,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1387 conditions, 693 events. 320/693 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3292 event pairs, 285 based on Foata normal form. 6/605 useless extension candidates. Maximal degree in co-relation 1328. Up to 610 conditions per place. [2022-12-13 14:58:15,730 INFO L137 encePairwiseOnDemand]: 356/359 looper letters, 37 selfloop transitions, 11 changer transitions 0/55 dead transitions. [2022-12-13 14:58:15,730 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 55 transitions, 275 flow [2022-12-13 14:58:15,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 14:58:15,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 14:58:15,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1986 transitions. [2022-12-13 14:58:15,733 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4610027855153203 [2022-12-13 14:58:15,733 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1986 transitions. [2022-12-13 14:58:15,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1986 transitions. [2022-12-13 14:58:15,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:58:15,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1986 transitions. [2022-12-13 14:58:15,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 165.5) internal successors, (1986), 12 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:15,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 359.0) internal successors, (4667), 13 states have internal predecessors, (4667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:15,742 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 359.0) internal successors, (4667), 13 states have internal predecessors, (4667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:15,742 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 143 flow. Second operand 12 states and 1986 transitions. [2022-12-13 14:58:15,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 55 transitions, 275 flow [2022-12-13 14:58:15,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 55 transitions, 261 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 14:58:15,744 INFO L231 Difference]: Finished difference. Result has 72 places, 55 transitions, 213 flow [2022-12-13 14:58:15,744 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=213, PETRI_PLACES=72, PETRI_TRANSITIONS=55} [2022-12-13 14:58:15,744 INFO L288 CegarLoopForPetriNet]: 45 programPoint places, 27 predicate places. [2022-12-13 14:58:15,744 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 55 transitions, 213 flow [2022-12-13 14:58:15,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 162.30769230769232) internal successors, (2110), 13 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:15,745 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:58:15,745 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2022-12-13 14:58:15,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-13 14:58:15,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:58:15,946 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 14:58:15,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:58:15,946 INFO L85 PathProgramCache]: Analyzing trace with hash 281073527, now seen corresponding path program 3 times [2022-12-13 14:58:15,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:58:15,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940200577] [2022-12-13 14:58:15,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:58:15,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:58:15,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:58:15,970 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 14:58:15,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:58:15,993 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 14:58:15,994 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 14:58:15,994 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-12-13 14:58:15,996 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-12-13 14:58:15,996 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-12-13 14:58:15,996 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-12-13 14:58:15,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 14:58:15,996 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2022-12-13 14:58:15,998 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 14:58:15,998 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 14:58:16,023 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 14:58:16,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 269 transitions, 556 flow [2022-12-13 14:58:16,070 INFO L130 PetriNetUnfolder]: 75/438 cut-off events. [2022-12-13 14:58:16,070 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2022-12-13 14:58:16,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 438 events. 75/438 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1742 event pairs, 0 based on Foata normal form. 0/354 useless extension candidates. Maximal degree in co-relation 271. Up to 12 conditions per place. [2022-12-13 14:58:16,072 INFO L82 GeneralOperation]: Start removeDead. Operand has 229 places, 269 transitions, 556 flow [2022-12-13 14:58:16,074 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 229 places, 269 transitions, 556 flow [2022-12-13 14:58:16,074 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:58:16,075 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 229 places, 269 transitions, 556 flow [2022-12-13 14:58:16,075 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 229 places, 269 transitions, 556 flow [2022-12-13 14:58:16,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 269 transitions, 556 flow [2022-12-13 14:58:16,111 INFO L130 PetriNetUnfolder]: 75/438 cut-off events. [2022-12-13 14:58:16,111 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2022-12-13 14:58:16,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 438 events. 75/438 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1742 event pairs, 0 based on Foata normal form. 0/354 useless extension candidates. Maximal degree in co-relation 271. Up to 12 conditions per place. [2022-12-13 14:58:16,124 INFO L119 LiptonReduction]: Number of co-enabled transitions 33180 [2022-12-13 14:58:18,590 INFO L134 LiptonReduction]: Checked pairs total: 56073 [2022-12-13 14:58:18,590 INFO L136 LiptonReduction]: Total number of compositions: 226 [2022-12-13 14:58:18,593 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:58:18,594 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;@65cd0a01, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:58:18,594 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-13 14:58:18,596 INFO L130 PetriNetUnfolder]: 7/23 cut-off events. [2022-12-13 14:58:18,596 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:58:18,596 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:58:18,597 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 14:58:18,597 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 14:58:18,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:58:18,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1187084905, now seen corresponding path program 1 times [2022-12-13 14:58:18,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:58:18,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336879543] [2022-12-13 14:58:18,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:58:18,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:58:18,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:58:18,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:58:18,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:58:18,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336879543] [2022-12-13 14:58:18,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336879543] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:58:18,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:58:18,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:58:18,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942459375] [2022-12-13 14:58:18,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:58:18,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:58:18,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:58:18,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:58:18,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:58:18,628 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 495 [2022-12-13 14:58:18,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 100 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 221.0) internal successors, (663), 3 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:18,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:58:18,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 495 [2022-12-13 14:58:18,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:58:19,669 INFO L130 PetriNetUnfolder]: 9850/15331 cut-off events. [2022-12-13 14:58:19,670 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-12-13 14:58:19,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29854 conditions, 15331 events. 9850/15331 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 100038 event pairs, 9172 based on Foata normal form. 3033/15939 useless extension candidates. Maximal degree in co-relation 12903. Up to 14424 conditions per place. [2022-12-13 14:58:19,721 INFO L137 encePairwiseOnDemand]: 461/495 looper letters, 55 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2022-12-13 14:58:19,721 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 272 flow [2022-12-13 14:58:19,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:58:19,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:58:19,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 746 transitions. [2022-12-13 14:58:19,723 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5023569023569023 [2022-12-13 14:58:19,723 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 746 transitions. [2022-12-13 14:58:19,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 746 transitions. [2022-12-13 14:58:19,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:58:19,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 746 transitions. [2022-12-13 14:58:19,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:19,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:19,727 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:19,727 INFO L175 Difference]: Start difference. First operand has 68 places, 100 transitions, 218 flow. Second operand 3 states and 746 transitions. [2022-12-13 14:58:19,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 272 flow [2022-12-13 14:58:19,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 272 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 14:58:19,728 INFO L231 Difference]: Finished difference. Result has 71 places, 70 transitions, 168 flow [2022-12-13 14:58:19,729 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=71, PETRI_TRANSITIONS=70} [2022-12-13 14:58:19,729 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2022-12-13 14:58:19,729 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 70 transitions, 168 flow [2022-12-13 14:58:19,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.0) internal successors, (663), 3 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:19,730 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:58:19,730 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:58:19,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 14:58:19,730 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 14:58:19,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:58:19,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1279435676, now seen corresponding path program 1 times [2022-12-13 14:58:19,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:58:19,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493772623] [2022-12-13 14:58:19,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:58:19,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:58:19,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:58:19,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:58:19,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:58:19,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493772623] [2022-12-13 14:58:19,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493772623] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:58:19,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415748720] [2022-12-13 14:58:19,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:58:19,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:58:19,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:58:19,770 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:58:19,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 14:58:19,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:58:19,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 14:58:19,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:58:19,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:58:19,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:58:19,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415748720] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:58:19,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:58:19,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 14:58:19,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640978396] [2022-12-13 14:58:19,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:58:19,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:58:19,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:58:19,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:58:19,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:58:19,838 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 495 [2022-12-13 14:58:19,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:19,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:58:19,839 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 495 [2022-12-13 14:58:19,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:58:20,816 INFO L130 PetriNetUnfolder]: 9700/15333 cut-off events. [2022-12-13 14:58:20,816 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2022-12-13 14:58:20,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29865 conditions, 15333 events. 9700/15333 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 103279 event pairs, 4384 based on Foata normal form. 0/12909 useless extension candidates. Maximal degree in co-relation 29852. Up to 14394 conditions per place. [2022-12-13 14:58:20,870 INFO L137 encePairwiseOnDemand]: 492/495 looper letters, 71 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2022-12-13 14:58:20,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 86 transitions, 346 flow [2022-12-13 14:58:20,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:58:20,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:58:20,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 730 transitions. [2022-12-13 14:58:20,872 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49158249158249157 [2022-12-13 14:58:20,872 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 730 transitions. [2022-12-13 14:58:20,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 730 transitions. [2022-12-13 14:58:20,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:58:20,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 730 transitions. [2022-12-13 14:58:20,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.33333333333334) internal successors, (730), 3 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:20,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:20,876 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:20,877 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 168 flow. Second operand 3 states and 730 transitions. [2022-12-13 14:58:20,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 86 transitions, 346 flow [2022-12-13 14:58:20,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 86 transitions, 342 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 14:58:20,879 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 176 flow [2022-12-13 14:58:20,879 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2022-12-13 14:58:20,879 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 5 predicate places. [2022-12-13 14:58:20,879 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 176 flow [2022-12-13 14:58:20,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:20,880 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:58:20,880 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:58:20,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 14:58:21,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:58:21,081 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 14:58:21,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:58:21,081 INFO L85 PathProgramCache]: Analyzing trace with hash 827475966, now seen corresponding path program 1 times [2022-12-13 14:58:21,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:58:21,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003910194] [2022-12-13 14:58:21,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:58:21,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:58:21,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:58:21,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:58:21,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:58:21,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003910194] [2022-12-13 14:58:21,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003910194] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:58:21,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078668891] [2022-12-13 14:58:21,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:58:21,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:58:21,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:58:21,120 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:58:21,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 14:58:21,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:58:21,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 14:58:21,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:58:21,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:58:21,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:58:21,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:58:21,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078668891] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:58:21,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:58:21,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 14:58:21,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868596121] [2022-12-13 14:58:21,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:58:21,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 14:58:21,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:58:21,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 14:58:21,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:58:21,211 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 495 [2022-12-13 14:58:21,212 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 176 flow. Second operand has 7 states, 7 states have (on average 219.85714285714286) internal successors, (1539), 7 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:21,212 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:58:21,212 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 495 [2022-12-13 14:58:21,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:58:22,197 INFO L130 PetriNetUnfolder]: 9952/15468 cut-off events. [2022-12-13 14:58:22,197 INFO L131 PetriNetUnfolder]: For 640/640 co-relation queries the response was YES. [2022-12-13 14:58:22,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30545 conditions, 15468 events. 9952/15468 cut-off events. For 640/640 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 100520 event pairs, 9172 based on Foata normal form. 3/13278 useless extension candidates. Maximal degree in co-relation 30517. Up to 14410 conditions per place. [2022-12-13 14:58:22,234 INFO L137 encePairwiseOnDemand]: 492/495 looper letters, 56 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2022-12-13 14:58:22,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 74 transitions, 310 flow [2022-12-13 14:58:22,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:58:22,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 14:58:22,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1371 transitions. [2022-12-13 14:58:22,237 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4616161616161616 [2022-12-13 14:58:22,237 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1371 transitions. [2022-12-13 14:58:22,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1371 transitions. [2022-12-13 14:58:22,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:58:22,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1371 transitions. [2022-12-13 14:58:22,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 228.5) internal successors, (1371), 6 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:22,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 495.0) internal successors, (3465), 7 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:22,242 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 495.0) internal successors, (3465), 7 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:22,242 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 176 flow. Second operand 6 states and 1371 transitions. [2022-12-13 14:58:22,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 74 transitions, 310 flow [2022-12-13 14:58:22,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 74 transitions, 308 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:58:22,244 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 210 flow [2022-12-13 14:58:22,245 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=80, PETRI_TRANSITIONS=74} [2022-12-13 14:58:22,245 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 12 predicate places. [2022-12-13 14:58:22,245 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 210 flow [2022-12-13 14:58:22,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 219.85714285714286) internal successors, (1539), 7 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:22,246 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:58:22,246 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:58:22,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 14:58:22,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:58:22,446 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 14:58:22,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:58:22,447 INFO L85 PathProgramCache]: Analyzing trace with hash -178871221, now seen corresponding path program 2 times [2022-12-13 14:58:22,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:58:22,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725749601] [2022-12-13 14:58:22,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:58:22,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:58:22,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:58:22,519 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:58:22,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:58:22,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725749601] [2022-12-13 14:58:22,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725749601] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:58:22,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367339091] [2022-12-13 14:58:22,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:58:22,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:58:22,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:58:22,521 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:58:22,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 14:58:22,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 14:58:22,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:58:22,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 14:58:22,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:58:22,611 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 [2022-12-13 14:58:22,654 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 14:58:22,654 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 [2022-12-13 14:58:22,675 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 [2022-12-13 14:58:22,726 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 14:58:22,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:58:22,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367339091] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:58:22,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:58:22,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2022-12-13 14:58:22,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512608668] [2022-12-13 14:58:22,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:58:22,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 14:58:22,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:58:22,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 14:58:22,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-12-13 14:58:22,891 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 495 [2022-12-13 14:58:22,893 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 210 flow. Second operand has 6 states, 6 states have (on average 211.33333333333334) internal successors, (1268), 6 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:22,893 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:58:22,893 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 495 [2022-12-13 14:58:22,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:58:24,277 INFO L130 PetriNetUnfolder]: 10040/16222 cut-off events. [2022-12-13 14:58:24,278 INFO L131 PetriNetUnfolder]: For 630/630 co-relation queries the response was YES. [2022-12-13 14:58:24,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32031 conditions, 16222 events. 10040/16222 cut-off events. For 630/630 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 113856 event pairs, 2280 based on Foata normal form. 0/14279 useless extension candidates. Maximal degree in co-relation 31995. Up to 12027 conditions per place. [2022-12-13 14:58:24,326 INFO L137 encePairwiseOnDemand]: 485/495 looper letters, 124 selfloop transitions, 14 changer transitions 14/165 dead transitions. [2022-12-13 14:58:24,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 165 transitions, 727 flow [2022-12-13 14:58:24,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:58:24,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 14:58:24,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1413 transitions. [2022-12-13 14:58:24,329 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47575757575757577 [2022-12-13 14:58:24,329 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1413 transitions. [2022-12-13 14:58:24,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1413 transitions. [2022-12-13 14:58:24,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:58:24,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1413 transitions. [2022-12-13 14:58:24,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 235.5) internal successors, (1413), 6 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:24,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 495.0) internal successors, (3465), 7 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:24,334 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 495.0) internal successors, (3465), 7 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:24,335 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 210 flow. Second operand 6 states and 1413 transitions. [2022-12-13 14:58:24,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 165 transitions, 727 flow [2022-12-13 14:58:24,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 165 transitions, 713 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 14:58:24,338 INFO L231 Difference]: Finished difference. Result has 88 places, 86 transitions, 293 flow [2022-12-13 14:58:24,338 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=293, PETRI_PLACES=88, PETRI_TRANSITIONS=86} [2022-12-13 14:58:24,338 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 20 predicate places. [2022-12-13 14:58:24,338 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 86 transitions, 293 flow [2022-12-13 14:58:24,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 211.33333333333334) internal successors, (1268), 6 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:24,339 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:58:24,339 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2022-12-13 14:58:24,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 14:58:24,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:58:24,540 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 14:58:24,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:58:24,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1493798899, now seen corresponding path program 1 times [2022-12-13 14:58:24,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:58:24,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691024047] [2022-12-13 14:58:24,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:58:24,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:58:24,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:58:24,625 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 14:58:24,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:58:24,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691024047] [2022-12-13 14:58:24,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691024047] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:58:24,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096391085] [2022-12-13 14:58:24,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:58:24,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:58:24,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:58:24,627 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:58:24,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 14:58:24,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:58:24,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 14:58:24,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:58:24,705 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 14:58:24,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:58:24,735 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 14:58:24,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096391085] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:58:24,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:58:24,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 14:58:24,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664817615] [2022-12-13 14:58:24,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:58:24,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 14:58:24,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:58:24,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 14:58:24,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 14:58:24,752 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 495 [2022-12-13 14:58:24,754 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 86 transitions, 293 flow. Second operand has 13 states, 13 states have (on average 219.3846153846154) internal successors, (2852), 13 states have internal predecessors, (2852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:24,754 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:58:24,754 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 495 [2022-12-13 14:58:24,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:58:25,926 INFO L130 PetriNetUnfolder]: 10038/16042 cut-off events. [2022-12-13 14:58:25,926 INFO L131 PetriNetUnfolder]: For 5280/5280 co-relation queries the response was YES. [2022-12-13 14:58:25,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35732 conditions, 16042 events. 10038/16042 cut-off events. For 5280/5280 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 110017 event pairs, 8795 based on Foata normal form. 6/15030 useless extension candidates. Maximal degree in co-relation 35673. Up to 15139 conditions per place. [2022-12-13 14:58:25,978 INFO L137 encePairwiseOnDemand]: 492/495 looper letters, 68 selfloop transitions, 11 changer transitions 0/92 dead transitions. [2022-12-13 14:58:25,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 92 transitions, 487 flow [2022-12-13 14:58:25,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 14:58:25,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 14:58:25,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2688 transitions. [2022-12-13 14:58:25,983 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45252525252525255 [2022-12-13 14:58:25,983 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2688 transitions. [2022-12-13 14:58:25,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2688 transitions. [2022-12-13 14:58:25,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:58:25,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2688 transitions. [2022-12-13 14:58:25,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 224.0) internal successors, (2688), 12 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:25,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 495.0) internal successors, (6435), 13 states have internal predecessors, (6435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:25,994 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 495.0) internal successors, (6435), 13 states have internal predecessors, (6435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:25,994 INFO L175 Difference]: Start difference. First operand has 88 places, 86 transitions, 293 flow. Second operand 12 states and 2688 transitions. [2022-12-13 14:58:25,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 92 transitions, 487 flow [2022-12-13 14:58:26,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 92 transitions, 487 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 14:58:26,008 INFO L231 Difference]: Finished difference. Result has 105 places, 92 transitions, 377 flow [2022-12-13 14:58:26,008 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=377, PETRI_PLACES=105, PETRI_TRANSITIONS=92} [2022-12-13 14:58:26,009 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 37 predicate places. [2022-12-13 14:58:26,009 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 92 transitions, 377 flow [2022-12-13 14:58:26,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 219.3846153846154) internal successors, (2852), 13 states have internal predecessors, (2852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:26,011 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:58:26,011 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2022-12-13 14:58:26,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 14:58:26,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:58:26,212 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 14:58:26,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:58:26,213 INFO L85 PathProgramCache]: Analyzing trace with hash 2070631187, now seen corresponding path program 2 times [2022-12-13 14:58:26,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:58:26,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377172092] [2022-12-13 14:58:26,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:58:26,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:58:26,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:58:26,269 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 14:58:26,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:58:26,288 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 14:58:26,288 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 14:58:26,289 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-12-13 14:58:26,289 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-12-13 14:58:26,289 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-12-13 14:58:26,289 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-12-13 14:58:26,289 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-12-13 14:58:26,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 14:58:26,289 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2022-12-13 14:58:26,290 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 14:58:26,290 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 14:58:26,318 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 14:58:26,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 289 places, 341 transitions, 712 flow [2022-12-13 14:58:26,382 INFO L130 PetriNetUnfolder]: 110/640 cut-off events. [2022-12-13 14:58:26,383 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2022-12-13 14:58:26,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 640 events. 110/640 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2803 event pairs, 1 based on Foata normal form. 0/519 useless extension candidates. Maximal degree in co-relation 446. Up to 16 conditions per place. [2022-12-13 14:58:26,387 INFO L82 GeneralOperation]: Start removeDead. Operand has 289 places, 341 transitions, 712 flow [2022-12-13 14:58:26,390 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 289 places, 341 transitions, 712 flow [2022-12-13 14:58:26,390 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:58:26,390 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 289 places, 341 transitions, 712 flow [2022-12-13 14:58:26,390 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 289 places, 341 transitions, 712 flow [2022-12-13 14:58:26,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 289 places, 341 transitions, 712 flow [2022-12-13 14:58:26,452 INFO L130 PetriNetUnfolder]: 110/640 cut-off events. [2022-12-13 14:58:26,452 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2022-12-13 14:58:26,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 640 events. 110/640 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2803 event pairs, 1 based on Foata normal form. 0/519 useless extension candidates. Maximal degree in co-relation 446. Up to 16 conditions per place. [2022-12-13 14:58:26,477 INFO L119 LiptonReduction]: Number of co-enabled transitions 65100 [2022-12-13 14:58:29,365 INFO L134 LiptonReduction]: Checked pairs total: 110720 [2022-12-13 14:58:29,365 INFO L136 LiptonReduction]: Total number of compositions: 282 [2022-12-13 14:58:29,366 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:58:29,367 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;@65cd0a01, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:58:29,367 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-13 14:58:29,369 INFO L130 PetriNetUnfolder]: 8/30 cut-off events. [2022-12-13 14:58:29,369 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:58:29,369 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:58:29,369 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 14:58:29,369 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 14:58:29,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:58:29,369 INFO L85 PathProgramCache]: Analyzing trace with hash 304633241, now seen corresponding path program 1 times [2022-12-13 14:58:29,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:58:29,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128194326] [2022-12-13 14:58:29,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:58:29,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:58:29,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:58:29,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:58:29,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:58:29,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128194326] [2022-12-13 14:58:29,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128194326] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:58:29,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:58:29,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:58:29,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570387139] [2022-12-13 14:58:29,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:58:29,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:58:29,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:58:29,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:58:29,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:58:29,394 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 623 [2022-12-13 14:58:29,395 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 133 transitions, 296 flow. Second operand has 3 states, 3 states have (on average 278.0) internal successors, (834), 3 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:29,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:58:29,396 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 623 [2022-12-13 14:58:29,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:58:47,069 INFO L130 PetriNetUnfolder]: 211193/301478 cut-off events. [2022-12-13 14:58:47,069 INFO L131 PetriNetUnfolder]: For 3280/3280 co-relation queries the response was YES. [2022-12-13 14:58:47,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 579962 conditions, 301478 events. 211193/301478 cut-off events. For 3280/3280 co-relation queries the response was YES. Maximal size of possible extension queue 8128. Compared 2426955 event pairs, 200610 based on Foata normal form. 63086/318618 useless extension candidates. Maximal degree in co-relation 39853. Up to 276498 conditions per place. [2022-12-13 14:58:48,634 INFO L137 encePairwiseOnDemand]: 578/623 looper letters, 70 selfloop transitions, 2 changer transitions 0/91 dead transitions. [2022-12-13 14:58:48,634 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 91 transitions, 356 flow [2022-12-13 14:58:48,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:58:48,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:58:48,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 943 transitions. [2022-12-13 14:58:48,638 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5045478865703584 [2022-12-13 14:58:48,638 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 943 transitions. [2022-12-13 14:58:48,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 943 transitions. [2022-12-13 14:58:48,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:58:48,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 943 transitions. [2022-12-13 14:58:48,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 314.3333333333333) internal successors, (943), 3 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:48,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 623.0) internal successors, (2492), 4 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:48,645 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 623.0) internal successors, (2492), 4 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:48,645 INFO L175 Difference]: Start difference. First operand has 90 places, 133 transitions, 296 flow. Second operand 3 states and 943 transitions. [2022-12-13 14:58:48,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 91 transitions, 356 flow [2022-12-13 14:58:48,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 91 transitions, 356 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 14:58:48,648 INFO L231 Difference]: Finished difference. Result has 92 places, 91 transitions, 222 flow [2022-12-13 14:58:48,648 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=623, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=92, PETRI_TRANSITIONS=91} [2022-12-13 14:58:48,649 INFO L288 CegarLoopForPetriNet]: 90 programPoint places, 2 predicate places. [2022-12-13 14:58:48,649 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 91 transitions, 222 flow [2022-12-13 14:58:48,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 278.0) internal successors, (834), 3 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:48,649 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:58:48,649 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:58:48,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 14:58:48,650 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 14:58:48,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:58:48,650 INFO L85 PathProgramCache]: Analyzing trace with hash -3565673, now seen corresponding path program 1 times [2022-12-13 14:58:48,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:58:48,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947166899] [2022-12-13 14:58:48,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:58:48,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:58:48,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:58:48,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:58:48,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:58:48,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947166899] [2022-12-13 14:58:48,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947166899] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:58:48,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216072136] [2022-12-13 14:58:48,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:58:48,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:58:48,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:58:48,684 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:58:48,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 14:58:48,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:58:48,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 14:58:48,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:58:48,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:58:48,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:58:48,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216072136] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:58:48,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:58:48,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 14:58:48,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44261082] [2022-12-13 14:58:48,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:58:48,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:58:48,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:58:48,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:58:48,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:58:48,760 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 623 [2022-12-13 14:58:48,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 91 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 278.3333333333333) internal successors, (835), 3 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:48,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:58:48,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 623 [2022-12-13 14:58:48,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:59:05,842 INFO L130 PetriNetUnfolder]: 211748/302066 cut-off events. [2022-12-13 14:59:05,842 INFO L131 PetriNetUnfolder]: For 3212/3212 co-relation queries the response was YES. [2022-12-13 14:59:06,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 580789 conditions, 302066 events. 211748/302066 cut-off events. For 3212/3212 co-relation queries the response was YES. Maximal size of possible extension queue 8052. Compared 2425927 event pairs, 131408 based on Foata normal form. 0/255655 useless extension candidates. Maximal degree in co-relation 580775. Up to 276678 conditions per place. [2022-12-13 14:59:07,122 INFO L137 encePairwiseOnDemand]: 620/623 looper letters, 86 selfloop transitions, 2 changer transitions 0/107 dead transitions. [2022-12-13 14:59:07,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 107 transitions, 430 flow [2022-12-13 14:59:07,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:59:07,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:59:07,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 916 transitions. [2022-12-13 14:59:07,125 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4901016586409845 [2022-12-13 14:59:07,125 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 916 transitions. [2022-12-13 14:59:07,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 916 transitions. [2022-12-13 14:59:07,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:59:07,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 916 transitions. [2022-12-13 14:59:07,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 305.3333333333333) internal successors, (916), 3 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:59:07,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 623.0) internal successors, (2492), 4 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:59:07,129 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 623.0) internal successors, (2492), 4 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:59:07,129 INFO L175 Difference]: Start difference. First operand has 92 places, 91 transitions, 222 flow. Second operand 3 states and 916 transitions. [2022-12-13 14:59:07,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 107 transitions, 430 flow [2022-12-13 14:59:07,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 107 transitions, 426 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 14:59:07,132 INFO L231 Difference]: Finished difference. Result has 94 places, 92 transitions, 230 flow [2022-12-13 14:59:07,132 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=623, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=230, PETRI_PLACES=94, PETRI_TRANSITIONS=92} [2022-12-13 14:59:07,133 INFO L288 CegarLoopForPetriNet]: 90 programPoint places, 4 predicate places. [2022-12-13 14:59:07,133 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 92 transitions, 230 flow [2022-12-13 14:59:07,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 278.3333333333333) internal successors, (835), 3 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:59:07,133 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:59:07,133 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:59:07,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 14:59:07,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:59:07,335 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 14:59:07,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:59:07,336 INFO L85 PathProgramCache]: Analyzing trace with hash 144274078, now seen corresponding path program 1 times [2022-12-13 14:59:07,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:59:07,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198728485] [2022-12-13 14:59:07,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:59:07,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:59:07,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:59:07,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:59:07,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:59:07,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198728485] [2022-12-13 14:59:07,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198728485] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:59:07,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754291586] [2022-12-13 14:59:07,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:59:07,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:59:07,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:59:07,374 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:59:07,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 14:59:07,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:59:07,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 14:59:07,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:59:07,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:59:07,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:59:07,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:59:07,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754291586] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:59:07,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:59:07,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 14:59:07,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705782915] [2022-12-13 14:59:07,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:59:07,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 14:59:07,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:59:07,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 14:59:07,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:59:07,482 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 623 [2022-12-13 14:59:07,483 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 92 transitions, 230 flow. Second operand has 7 states, 7 states have (on average 276.85714285714283) internal successors, (1938), 7 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:59:07,483 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:59:07,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 623 [2022-12-13 14:59:07,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:59:25,210 INFO L130 PetriNetUnfolder]: 213192/303010 cut-off events. [2022-12-13 14:59:25,210 INFO L131 PetriNetUnfolder]: For 10848/10848 co-relation queries the response was YES. [2022-12-13 14:59:25,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589398 conditions, 303010 events. 213192/303010 cut-off events. For 10848/10848 co-relation queries the response was YES. Maximal size of possible extension queue 8021. Compared 2414555 event pairs, 200610 based on Foata normal form. 3/260369 useless extension candidates. Maximal degree in co-relation 589369. Up to 276694 conditions per place. [2022-12-13 14:59:26,537 INFO L137 encePairwiseOnDemand]: 620/623 looper letters, 71 selfloop transitions, 5 changer transitions 0/95 dead transitions. [2022-12-13 14:59:26,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 95 transitions, 394 flow [2022-12-13 14:59:26,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:59:26,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 14:59:26,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1728 transitions. [2022-12-13 14:59:26,541 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4622792937399679 [2022-12-13 14:59:26,541 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1728 transitions. [2022-12-13 14:59:26,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1728 transitions. [2022-12-13 14:59:26,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:59:26,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1728 transitions. [2022-12-13 14:59:26,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 288.0) internal successors, (1728), 6 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:59:26,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 623.0) internal successors, (4361), 7 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:59:26,547 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 623.0) internal successors, (4361), 7 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:59:26,548 INFO L175 Difference]: Start difference. First operand has 94 places, 92 transitions, 230 flow. Second operand 6 states and 1728 transitions. [2022-12-13 14:59:26,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 95 transitions, 394 flow [2022-12-13 14:59:26,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 95 transitions, 392 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:59:26,559 INFO L231 Difference]: Finished difference. Result has 101 places, 95 transitions, 264 flow [2022-12-13 14:59:26,559 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=623, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=264, PETRI_PLACES=101, PETRI_TRANSITIONS=95} [2022-12-13 14:59:26,559 INFO L288 CegarLoopForPetriNet]: 90 programPoint places, 11 predicate places. [2022-12-13 14:59:26,560 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 95 transitions, 264 flow [2022-12-13 14:59:26,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 276.85714285714283) internal successors, (1938), 7 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:59:26,560 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:59:26,560 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:59:26,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 14:59:26,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 14:59:26,762 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 14:59:26,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:59:26,763 INFO L85 PathProgramCache]: Analyzing trace with hash 735733664, now seen corresponding path program 2 times [2022-12-13 14:59:26,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:59:26,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007669644] [2022-12-13 14:59:26,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:59:26,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:59:26,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:59:26,841 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:59:26,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:59:26,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007669644] [2022-12-13 14:59:26,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007669644] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:59:26,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217863103] [2022-12-13 14:59:26,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:59:26,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:59:26,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:59:26,843 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:59:26,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 14:59:26,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 14:59:26,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:59:26,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 14:59:26,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:59:26,928 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 [2022-12-13 14:59:27,006 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 14:59:27,006 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 [2022-12-13 14:59:27,023 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 [2022-12-13 14:59:27,061 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 14:59:27,061 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:59:27,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217863103] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:59:27,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:59:27,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2022-12-13 14:59:27,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687685264] [2022-12-13 14:59:27,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:59:27,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 14:59:27,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:59:27,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 14:59:27,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-12-13 14:59:27,206 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 623 [2022-12-13 14:59:27,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 95 transitions, 264 flow. Second operand has 6 states, 6 states have (on average 266.3333333333333) internal successors, (1598), 6 states have internal predecessors, (1598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:59:27,207 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:59:27,207 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 623 [2022-12-13 14:59:27,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:59:47,513 INFO L130 PetriNetUnfolder]: 218490/315497 cut-off events. [2022-12-13 14:59:47,513 INFO L131 PetriNetUnfolder]: For 10926/10926 co-relation queries the response was YES. [2022-12-13 14:59:48,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 617928 conditions, 315497 events. 218490/315497 cut-off events. For 10926/10926 co-relation queries the response was YES. Maximal size of possible extension queue 9051. Compared 2637498 event pairs, 48395 based on Foata normal form. 0/276962 useless extension candidates. Maximal degree in co-relation 617891. Up to 249081 conditions per place. [2022-12-13 14:59:48,930 INFO L137 encePairwiseOnDemand]: 611/623 looper letters, 191 selfloop transitions, 18 changer transitions 0/228 dead transitions. [2022-12-13 14:59:48,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 228 transitions, 999 flow [2022-12-13 14:59:48,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:59:48,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 14:59:48,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1804 transitions. [2022-12-13 14:59:48,933 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4826110219368646 [2022-12-13 14:59:48,934 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1804 transitions. [2022-12-13 14:59:48,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1804 transitions. [2022-12-13 14:59:48,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:59:48,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1804 transitions. [2022-12-13 14:59:48,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 300.6666666666667) internal successors, (1804), 6 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:59:48,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 623.0) internal successors, (4361), 7 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:59:48,939 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 623.0) internal successors, (4361), 7 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:59:48,940 INFO L175 Difference]: Start difference. First operand has 101 places, 95 transitions, 264 flow. Second operand 6 states and 1804 transitions. [2022-12-13 14:59:48,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 228 transitions, 999 flow [2022-12-13 14:59:48,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 228 transitions, 985 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 14:59:48,947 INFO L231 Difference]: Finished difference. Result has 109 places, 111 transitions, 377 flow [2022-12-13 14:59:48,947 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=623, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=377, PETRI_PLACES=109, PETRI_TRANSITIONS=111} [2022-12-13 14:59:48,948 INFO L288 CegarLoopForPetriNet]: 90 programPoint places, 19 predicate places. [2022-12-13 14:59:48,948 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 111 transitions, 377 flow [2022-12-13 14:59:48,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 266.3333333333333) internal successors, (1598), 6 states have internal predecessors, (1598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:59:48,948 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:59:48,948 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2022-12-13 14:59:48,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 14:59:49,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 14:59:49,150 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 14:59:49,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:59:49,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1102679891, now seen corresponding path program 1 times [2022-12-13 14:59:49,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:59:49,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433909809] [2022-12-13 14:59:49,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:59:49,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:59:49,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:59:49,216 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 14:59:49,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:59:49,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433909809] [2022-12-13 14:59:49,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433909809] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:59:49,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163703865] [2022-12-13 14:59:49,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:59:49,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:59:49,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:59:49,217 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:59:49,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 14:59:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:59:49,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 14:59:49,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:59:49,316 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 14:59:49,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:59:49,352 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 14:59:49,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163703865] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:59:49,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:59:49,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 14:59:49,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122397924] [2022-12-13 14:59:49,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:59:49,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 14:59:49,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:59:49,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 14:59:49,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 14:59:49,378 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 623 [2022-12-13 14:59:49,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 111 transitions, 377 flow. Second operand has 13 states, 13 states have (on average 276.46153846153845) internal successors, (3594), 13 states have internal predecessors, (3594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:59:49,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:59:49,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 623 [2022-12-13 14:59:49,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:00:12,907 INFO L130 PetriNetUnfolder]: 218965/315022 cut-off events. [2022-12-13 15:00:12,908 INFO L131 PetriNetUnfolder]: For 120203/120203 co-relation queries the response was YES. [2022-12-13 15:00:13,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 696176 conditions, 315022 events. 218965/315022 cut-off events. For 120203/120203 co-relation queries the response was YES. Maximal size of possible extension queue 9035. Compared 2601309 event pairs, 193374 based on Foata normal form. 6/294818 useless extension candidates. Maximal degree in co-relation 696116. Up to 291891 conditions per place. [2022-12-13 15:00:14,596 INFO L137 encePairwiseOnDemand]: 620/623 looper letters, 87 selfloop transitions, 11 changer transitions 0/117 dead transitions. [2022-12-13 15:00:14,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 117 transitions, 609 flow [2022-12-13 15:00:14,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 15:00:14,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 15:00:14,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3387 transitions. [2022-12-13 15:00:14,602 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4530497592295345 [2022-12-13 15:00:14,603 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3387 transitions. [2022-12-13 15:00:14,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3387 transitions. [2022-12-13 15:00:14,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:00:14,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3387 transitions. [2022-12-13 15:00:14,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 282.25) internal successors, (3387), 12 states have internal predecessors, (3387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:00:14,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 623.0) internal successors, (8099), 13 states have internal predecessors, (8099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:00:14,614 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 623.0) internal successors, (8099), 13 states have internal predecessors, (8099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:00:14,614 INFO L175 Difference]: Start difference. First operand has 109 places, 111 transitions, 377 flow. Second operand 12 states and 3387 transitions. [2022-12-13 15:00:14,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 117 transitions, 609 flow [2022-12-13 15:00:14,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 117 transitions, 609 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 15:00:15,000 INFO L231 Difference]: Finished difference. Result has 126 places, 117 transitions, 461 flow [2022-12-13 15:00:15,001 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=623, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=461, PETRI_PLACES=126, PETRI_TRANSITIONS=117} [2022-12-13 15:00:15,001 INFO L288 CegarLoopForPetriNet]: 90 programPoint places, 36 predicate places. [2022-12-13 15:00:15,001 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 117 transitions, 461 flow [2022-12-13 15:00:15,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 276.46153846153845) internal successors, (3594), 13 states have internal predecessors, (3594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:00:15,001 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:15,002 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2022-12-13 15:00:15,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 15:00:15,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487c8397-508d-48fa-942e-52cbdd9890dd/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 15:00:15,203 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 15:00:15,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:15,203 INFO L85 PathProgramCache]: Analyzing trace with hash -859320685, now seen corresponding path program 2 times [2022-12-13 15:00:15,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:15,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670588910] [2022-12-13 15:00:15,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:15,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:15,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:00:15,228 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 15:00:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:00:15,243 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 15:00:15,244 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 15:00:15,244 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-12-13 15:00:15,244 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-12-13 15:00:15,244 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-12-13 15:00:15,244 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-12-13 15:00:15,244 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-12-13 15:00:15,244 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-12-13 15:00:15,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 15:00:15,244 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2022-12-13 15:00:15,245 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 15:00:15,245 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 15:00:15,276 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 15:00:15,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 349 places, 413 transitions, 870 flow [2022-12-13 15:00:15,426 INFO L130 PetriNetUnfolder]: 157/910 cut-off events. [2022-12-13 15:00:15,426 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2022-12-13 15:00:15,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 965 conditions, 910 events. 157/910 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4351 event pairs, 6 based on Foata normal form. 0/744 useless extension candidates. Maximal degree in co-relation 660. Up to 32 conditions per place. [2022-12-13 15:00:15,435 INFO L82 GeneralOperation]: Start removeDead. Operand has 349 places, 413 transitions, 870 flow [2022-12-13 15:00:15,441 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 349 places, 413 transitions, 870 flow [2022-12-13 15:00:15,441 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 15:00:15,442 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 349 places, 413 transitions, 870 flow [2022-12-13 15:00:15,442 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 349 places, 413 transitions, 870 flow [2022-12-13 15:00:15,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 349 places, 413 transitions, 870 flow [2022-12-13 15:00:15,556 INFO L130 PetriNetUnfolder]: 157/910 cut-off events. [2022-12-13 15:00:15,556 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2022-12-13 15:00:15,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 965 conditions, 910 events. 157/910 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4351 event pairs, 6 based on Foata normal form. 0/744 useless extension candidates. Maximal degree in co-relation 660. Up to 32 conditions per place. [2022-12-13 15:00:15,603 INFO L119 LiptonReduction]: Number of co-enabled transitions 107240 [2022-12-13 15:00:18,728 INFO L134 LiptonReduction]: Checked pairs total: 189001 [2022-12-13 15:00:18,728 INFO L136 LiptonReduction]: Total number of compositions: 342 [2022-12-13 15:00:18,729 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:00:18,730 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;@65cd0a01, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:00:18,730 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 15:00:18,731 INFO L130 PetriNetUnfolder]: 7/23 cut-off events. [2022-12-13 15:00:18,731 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:00:18,731 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:00:18,731 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 15:00:18,731 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 15:00:18,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:00:18,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1074874861, now seen corresponding path program 1 times [2022-12-13 15:00:18,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:00:18,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671493996] [2022-12-13 15:00:18,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:00:18,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:00:18,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:00:18,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:00:18,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:00:18,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671493996] [2022-12-13 15:00:18,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671493996] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:00:18,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:00:18,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:00:18,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176407442] [2022-12-13 15:00:18,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:00:18,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:00:18,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:00:18,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:00:18,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:00:18,756 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 333 out of 755 [2022-12-13 15:00:18,757 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 165 transitions, 374 flow. Second operand has 3 states, 3 states have (on average 335.0) internal successors, (1005), 3 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:00:18,757 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:00:18,757 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 333 of 755 [2022-12-13 15:00:18,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand