./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-deagle/reorder_c11_bad-10.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec04e61-578a-46a5-9fd3-59bef409f15d/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec04e61-578a-46a5-9fd3-59bef409f15d/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec04e61-578a-46a5-9fd3-59bef409f15d/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec04e61-578a-46a5-9fd3-59bef409f15d/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-deagle/reorder_c11_bad-10.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec04e61-578a-46a5-9fd3-59bef409f15d/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec04e61-578a-46a5-9fd3-59bef409f15d/bin/uautomizer-vX5HgA9Q3a --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 10d5067d95273951a014725afb4753c98c29896d9675321f4fa3b00f339e7930 --- 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-b5237d8 [2022-11-21 16:45:31,965 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:45:31,967 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:45:31,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:45:31,992 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:45:31,993 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:45:31,994 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:45:31,997 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:45:31,999 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:45:32,000 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:45:32,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:45:32,003 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:45:32,004 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:45:32,005 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:45:32,006 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:45:32,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:45:32,009 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:45:32,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:45:32,014 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:45:32,016 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:45:32,018 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:45:32,028 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:45:32,029 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:45:32,030 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:45:32,034 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:45:32,035 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:45:32,035 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:45:32,037 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:45:32,037 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:45:32,049 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:45:32,049 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:45:32,050 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:45:32,051 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:45:32,052 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:45:32,053 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:45:32,054 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:45:32,054 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:45:32,055 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:45:32,055 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:45:32,056 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:45:32,057 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:45:32,061 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec04e61-578a-46a5-9fd3-59bef409f15d/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 16:45:32,101 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:45:32,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:45:32,102 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:45:32,102 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:45:32,110 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:45:32,110 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:45:32,111 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:45:32,111 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:45:32,111 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:45:32,112 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:45:32,113 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:45:32,113 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:45:32,113 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:45:32,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:45:32,113 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:45:32,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:45:32,114 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:45:32,114 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:45:32,114 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:45:32,114 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:45:32,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:45:32,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:45:32,115 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:45:32,116 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:45:32,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:45:32,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:45:32,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:45:32,116 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:45:32,117 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:45:32,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:45:32,117 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:45:32,117 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:45:32,118 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:45:32,118 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec04e61-578a-46a5-9fd3-59bef409f15d/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec04e61-578a-46a5-9fd3-59bef409f15d/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10d5067d95273951a014725afb4753c98c29896d9675321f4fa3b00f339e7930 [2022-11-21 16:45:32,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:45:32,434 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:45:32,437 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:45:32,439 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:45:32,440 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:45:32,441 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec04e61-578a-46a5-9fd3-59bef409f15d/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/pthread-deagle/reorder_c11_bad-10.i [2022-11-21 16:45:35,614 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:45:35,949 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:45:35,950 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec04e61-578a-46a5-9fd3-59bef409f15d/sv-benchmarks/c/pthread-deagle/reorder_c11_bad-10.i [2022-11-21 16:45:35,970 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec04e61-578a-46a5-9fd3-59bef409f15d/bin/uautomizer-vX5HgA9Q3a/data/62a1448e6/216f598f65724b0f9c0868703f39026c/FLAGd4a3df51b [2022-11-21 16:45:35,987 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec04e61-578a-46a5-9fd3-59bef409f15d/bin/uautomizer-vX5HgA9Q3a/data/62a1448e6/216f598f65724b0f9c0868703f39026c [2022-11-21 16:45:35,989 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:45:35,991 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:45:35,993 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:45:35,993 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:45:35,997 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:45:35,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:45:35" (1/1) ... [2022-11-21 16:45:36,000 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8ce02cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:45:36, skipping insertion in model container [2022-11-21 16:45:36,000 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:45:35" (1/1) ... [2022-11-21 16:45:36,009 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:45:36,074 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:45:36,394 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_3ec04e61-578a-46a5-9fd3-59bef409f15d/sv-benchmarks/c/pthread-deagle/reorder_c11_bad-10.i[30190,30203] [2022-11-21 16:45:36,415 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:45:36,424 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:45:36,483 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_3ec04e61-578a-46a5-9fd3-59bef409f15d/sv-benchmarks/c/pthread-deagle/reorder_c11_bad-10.i[30190,30203] [2022-11-21 16:45:36,500 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:45:36,534 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:45:36,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:45:36 WrapperNode [2022-11-21 16:45:36,535 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:45:36,536 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:45:36,536 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:45:36,537 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:45:36,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:45:36" (1/1) ... [2022-11-21 16:45:36,557 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:45:36" (1/1) ... [2022-11-21 16:45:36,578 INFO L138 Inliner]: procedures = 163, calls = 21, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 71 [2022-11-21 16:45:36,579 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:45:36,579 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:45:36,580 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:45:36,580 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:45:36,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:45:36" (1/1) ... [2022-11-21 16:45:36,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:45:36" (1/1) ... [2022-11-21 16:45:36,592 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:45:36" (1/1) ... [2022-11-21 16:45:36,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:45:36" (1/1) ... [2022-11-21 16:45:36,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:45:36" (1/1) ... [2022-11-21 16:45:36,603 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:45:36" (1/1) ... [2022-11-21 16:45:36,605 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:45:36" (1/1) ... [2022-11-21 16:45:36,606 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:45:36" (1/1) ... [2022-11-21 16:45:36,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:45:36,610 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:45:36,610 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:45:36,610 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:45:36,611 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:45:36" (1/1) ... [2022-11-21 16:45:36,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:45:36,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec04e61-578a-46a5-9fd3-59bef409f15d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:45:36,645 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec04e61-578a-46a5-9fd3-59bef409f15d/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:45:36,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec04e61-578a-46a5-9fd3-59bef409f15d/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:45:36,700 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 16:45:36,700 INFO L130 BoogieDeclarations]: Found specification of procedure setThread [2022-11-21 16:45:36,700 INFO L138 BoogieDeclarations]: Found implementation of procedure setThread [2022-11-21 16:45:36,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 16:45:36,701 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-21 16:45:36,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:45:36,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 16:45:36,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 16:45:36,705 INFO L130 BoogieDeclarations]: Found specification of procedure checkThread [2022-11-21 16:45:36,705 INFO L138 BoogieDeclarations]: Found implementation of procedure checkThread [2022-11-21 16:45:36,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:45:36,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-21 16:45:36,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:45:36,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:45:36,708 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 16:45:36,834 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:45:36,836 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:45:37,029 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:45:37,037 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:45:37,038 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-21 16:45:37,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:45:37 BoogieIcfgContainer [2022-11-21 16:45:37,041 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:45:37,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:45:37,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:45:37,048 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:45:37,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:45:35" (1/3) ... [2022-11-21 16:45:37,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b720930 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:45:37, skipping insertion in model container [2022-11-21 16:45:37,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:45:36" (2/3) ... [2022-11-21 16:45:37,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b720930 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:45:37, skipping insertion in model container [2022-11-21 16:45:37,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:45:37" (3/3) ... [2022-11-21 16:45:37,052 INFO L112 eAbstractionObserver]: Analyzing ICFG reorder_c11_bad-10.i [2022-11-21 16:45:37,071 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 16:45:37,083 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:45:37,083 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 16:45:37,083 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 16:45:37,160 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-21 16:45:37,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 91 transitions, 204 flow [2022-11-21 16:45:37,329 INFO L130 PetriNetUnfolder]: 24/202 cut-off events. [2022-11-21 16:45:37,330 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-21 16:45:37,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 202 events. 24/202 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 622 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 105. Up to 8 conditions per place. [2022-11-21 16:45:37,337 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 91 transitions, 204 flow [2022-11-21 16:45:37,343 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 89 transitions, 194 flow [2022-11-21 16:45:37,355 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:45:37,363 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;@2f3ee3ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:45:37,363 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-21 16:45:37,387 INFO L130 PetriNetUnfolder]: 4/64 cut-off events. [2022-11-21 16:45:37,387 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 16:45:37,387 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:45:37,388 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:45:37,389 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 16:45:37,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:37,395 INFO L85 PathProgramCache]: Analyzing trace with hash -211201094, now seen corresponding path program 1 times [2022-11-21 16:45:37,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:45:37,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206903113] [2022-11-21 16:45:37,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:37,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:45:37,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:37,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:45:37,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:45:37,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206903113] [2022-11-21 16:45:37,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206903113] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:45:37,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:45:37,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:45:37,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492216586] [2022-11-21 16:45:37,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:45:37,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 16:45:37,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:45:37,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 16:45:37,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:45:37,725 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 91 [2022-11-21 16:45:37,728 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 89 transitions, 194 flow. Second operand has 2 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:37,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:45:37,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 91 [2022-11-21 16:45:37,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:45:37,857 INFO L130 PetriNetUnfolder]: 4/172 cut-off events. [2022-11-21 16:45:37,857 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-11-21 16:45:37,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 172 events. 4/172 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 553 event pairs, 0 based on Foata normal form. 18/174 useless extension candidates. Maximal degree in co-relation 104. Up to 8 conditions per place. [2022-11-21 16:45:37,863 INFO L137 encePairwiseOnDemand]: 86/91 looper letters, 4 selfloop transitions, 0 changer transitions 0/83 dead transitions. [2022-11-21 16:45:37,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 83 transitions, 190 flow [2022-11-21 16:45:37,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 16:45:37,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 16:45:37,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 167 transitions. [2022-11-21 16:45:37,889 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9175824175824175 [2022-11-21 16:45:37,890 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 167 transitions. [2022-11-21 16:45:37,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 167 transitions. [2022-11-21 16:45:37,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:45:37,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 167 transitions. [2022-11-21 16:45:37,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 83.5) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:37,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:37,912 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:37,914 INFO L175 Difference]: Start difference. First operand has 87 places, 89 transitions, 194 flow. Second operand 2 states and 167 transitions. [2022-11-21 16:45:37,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 83 transitions, 190 flow [2022-11-21 16:45:37,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 83 transitions, 190 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 16:45:37,922 INFO L231 Difference]: Finished difference. Result has 87 places, 83 transitions, 182 flow [2022-11-21 16:45:37,931 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=182, PETRI_PLACES=87, PETRI_TRANSITIONS=83} [2022-11-21 16:45:37,935 INFO L288 CegarLoopForPetriNet]: 87 programPoint places, 0 predicate places. [2022-11-21 16:45:37,938 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 83 transitions, 182 flow [2022-11-21 16:45:37,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:37,939 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:45:37,939 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:45:37,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:45:37,941 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 16:45:37,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:37,944 INFO L85 PathProgramCache]: Analyzing trace with hash -407714599, now seen corresponding path program 1 times [2022-11-21 16:45:37,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:45:37,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971116249] [2022-11-21 16:45:37,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:37,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:45:38,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:38,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:45:38,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:45:38,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971116249] [2022-11-21 16:45:38,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971116249] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:45:38,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:45:38,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:45:38,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522039844] [2022-11-21 16:45:38,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:45:38,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:45:38,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:45:38,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:45:38,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:45:38,226 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 91 [2022-11-21 16:45:38,227 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 83 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:38,227 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:45:38,227 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 91 [2022-11-21 16:45:38,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:45:38,311 INFO L130 PetriNetUnfolder]: 0/80 cut-off events. [2022-11-21 16:45:38,311 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-21 16:45:38,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 80 events. 0/80 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-11-21 16:45:38,312 INFO L137 encePairwiseOnDemand]: 80/91 looper letters, 24 selfloop transitions, 7 changer transitions 0/76 dead transitions. [2022-11-21 16:45:38,312 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 76 transitions, 227 flow [2022-11-21 16:45:38,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:45:38,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 16:45:38,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 197 transitions. [2022-11-21 16:45:38,315 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7216117216117216 [2022-11-21 16:45:38,315 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 197 transitions. [2022-11-21 16:45:38,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 197 transitions. [2022-11-21 16:45:38,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:45:38,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 197 transitions. [2022-11-21 16:45:38,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:38,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:38,319 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:38,319 INFO L175 Difference]: Start difference. First operand has 87 places, 83 transitions, 182 flow. Second operand 3 states and 197 transitions. [2022-11-21 16:45:38,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 76 transitions, 227 flow [2022-11-21 16:45:38,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 76 transitions, 227 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 16:45:38,322 INFO L231 Difference]: Finished difference. Result has 78 places, 70 transitions, 180 flow [2022-11-21 16:45:38,323 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=78, PETRI_TRANSITIONS=70} [2022-11-21 16:45:38,324 INFO L288 CegarLoopForPetriNet]: 87 programPoint places, -9 predicate places. [2022-11-21 16:45:38,324 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 70 transitions, 180 flow [2022-11-21 16:45:38,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:38,324 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:45:38,325 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:45:38,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:45:38,325 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 16:45:38,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:38,326 INFO L85 PathProgramCache]: Analyzing trace with hash -121871665, now seen corresponding path program 1 times [2022-11-21 16:45:38,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:45:38,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706641770] [2022-11-21 16:45:38,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:38,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:45:38,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:45:38,364 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 16:45:38,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:45:38,434 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 16:45:38,441 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 16:45:38,442 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-21 16:45:38,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-21 16:45:38,445 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-11-21 16:45:38,446 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-21 16:45:38,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 16:45:38,447 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-21 16:45:38,456 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 16:45:38,456 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-21 16:45:38,494 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-11-21 16:45:38,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 110 transitions, 268 flow [2022-11-21 16:45:38,606 INFO L130 PetriNetUnfolder]: 107/656 cut-off events. [2022-11-21 16:45:38,606 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-11-21 16:45:38,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 753 conditions, 656 events. 107/656 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3163 event pairs, 2 based on Foata normal form. 0/556 useless extension candidates. Maximal degree in co-relation 395. Up to 32 conditions per place. [2022-11-21 16:45:38,612 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 110 transitions, 268 flow [2022-11-21 16:45:38,616 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 110 transitions, 268 flow [2022-11-21 16:45:38,618 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:45:38,619 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;@2f3ee3ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:45:38,620 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-21 16:45:38,628 INFO L130 PetriNetUnfolder]: 5/68 cut-off events. [2022-11-21 16:45:38,629 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 16:45:38,629 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:45:38,629 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:45:38,630 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:45:38,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:38,631 INFO L85 PathProgramCache]: Analyzing trace with hash -341074863, now seen corresponding path program 1 times [2022-11-21 16:45:38,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:45:38,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645534063] [2022-11-21 16:45:38,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:38,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:45:38,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:38,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:45:38,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:45:38,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645534063] [2022-11-21 16:45:38,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645534063] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:45:38,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:45:38,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:45:38,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571934479] [2022-11-21 16:45:38,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:45:38,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 16:45:38,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:45:38,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 16:45:38,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:45:38,679 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 110 [2022-11-21 16:45:38,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 110 transitions, 268 flow. Second operand has 2 states, 2 states have (on average 91.0) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:38,680 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:45:38,680 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 110 [2022-11-21 16:45:38,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:45:38,797 INFO L130 PetriNetUnfolder]: 57/600 cut-off events. [2022-11-21 16:45:38,798 INFO L131 PetriNetUnfolder]: For 212/212 co-relation queries the response was YES. [2022-11-21 16:45:38,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 600 events. 57/600 cut-off events. For 212/212 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3087 event pairs, 1 based on Foata normal form. 81/631 useless extension candidates. Maximal degree in co-relation 392. Up to 73 conditions per place. [2022-11-21 16:45:38,803 INFO L137 encePairwiseOnDemand]: 104/110 looper letters, 12 selfloop transitions, 0 changer transitions 0/102 dead transitions. [2022-11-21 16:45:38,804 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 102 transitions, 276 flow [2022-11-21 16:45:38,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 16:45:38,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 16:45:38,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 198 transitions. [2022-11-21 16:45:38,812 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9 [2022-11-21 16:45:38,812 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 198 transitions. [2022-11-21 16:45:38,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 198 transitions. [2022-11-21 16:45:38,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:45:38,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 198 transitions. [2022-11-21 16:45:38,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 99.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:38,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:38,820 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:38,820 INFO L175 Difference]: Start difference. First operand has 105 places, 110 transitions, 268 flow. Second operand 2 states and 198 transitions. [2022-11-21 16:45:38,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 102 transitions, 276 flow [2022-11-21 16:45:38,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 102 transitions, 276 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 16:45:38,828 INFO L231 Difference]: Finished difference. Result has 104 places, 102 transitions, 252 flow [2022-11-21 16:45:38,828 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=252, PETRI_PLACES=104, PETRI_TRANSITIONS=102} [2022-11-21 16:45:38,831 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, -1 predicate places. [2022-11-21 16:45:38,832 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 102 transitions, 252 flow [2022-11-21 16:45:38,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 91.0) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:38,832 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:45:38,832 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:45:38,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 16:45:38,833 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:45:38,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:38,834 INFO L85 PathProgramCache]: Analyzing trace with hash -537588368, now seen corresponding path program 1 times [2022-11-21 16:45:38,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:45:38,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650034418] [2022-11-21 16:45:38,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:38,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:45:38,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:38,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:45:38,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:45:38,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650034418] [2022-11-21 16:45:38,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650034418] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:45:38,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:45:38,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:45:38,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263240156] [2022-11-21 16:45:38,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:45:38,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:45:38,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:45:38,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:45:38,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:45:38,989 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 110 [2022-11-21 16:45:38,992 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 102 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:38,993 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:45:38,993 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 110 [2022-11-21 16:45:38,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:45:39,253 INFO L130 PetriNetUnfolder]: 58/575 cut-off events. [2022-11-21 16:45:39,253 INFO L131 PetriNetUnfolder]: For 90/90 co-relation queries the response was YES. [2022-11-21 16:45:39,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1028 conditions, 575 events. 58/575 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2885 event pairs, 0 based on Foata normal form. 0/539 useless extension candidates. Maximal degree in co-relation 1021. Up to 207 conditions per place. [2022-11-21 16:45:39,257 INFO L137 encePairwiseOnDemand]: 98/110 looper letters, 53 selfloop transitions, 8 changer transitions 0/126 dead transitions. [2022-11-21 16:45:39,257 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 126 transitions, 446 flow [2022-11-21 16:45:39,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:45:39,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 16:45:39,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 260 transitions. [2022-11-21 16:45:39,259 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7878787878787878 [2022-11-21 16:45:39,259 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 260 transitions. [2022-11-21 16:45:39,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 260 transitions. [2022-11-21 16:45:39,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:45:39,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 260 transitions. [2022-11-21 16:45:39,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:39,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:39,263 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:39,264 INFO L175 Difference]: Start difference. First operand has 104 places, 102 transitions, 252 flow. Second operand 3 states and 260 transitions. [2022-11-21 16:45:39,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 126 transitions, 446 flow [2022-11-21 16:45:39,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 126 transitions, 446 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 16:45:39,270 INFO L231 Difference]: Finished difference. Result has 107 places, 106 transitions, 300 flow [2022-11-21 16:45:39,271 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=300, PETRI_PLACES=107, PETRI_TRANSITIONS=106} [2022-11-21 16:45:39,273 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, 2 predicate places. [2022-11-21 16:45:39,273 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 106 transitions, 300 flow [2022-11-21 16:45:39,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:39,273 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:45:39,274 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:45:39,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 16:45:39,274 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:45:39,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:39,275 INFO L85 PathProgramCache]: Analyzing trace with hash 853052668, now seen corresponding path program 1 times [2022-11-21 16:45:39,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:45:39,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120058223] [2022-11-21 16:45:39,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:39,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:45:39,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:39,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:45:39,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:45:39,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120058223] [2022-11-21 16:45:39,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120058223] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:45:39,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273471341] [2022-11-21 16:45:39,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:39,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:45:39,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec04e61-578a-46a5-9fd3-59bef409f15d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:45:39,487 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec04e61-578a-46a5-9fd3-59bef409f15d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:45:39,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec04e61-578a-46a5-9fd3-59bef409f15d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:45:39,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:39,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 16:45:39,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:45:39,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:45:39,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:45:39,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:45:39,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273471341] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:45:39,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:45:39,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-21 16:45:39,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250516074] [2022-11-21 16:45:39,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:45:39,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 16:45:39,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:45:39,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 16:45:39,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:45:39,791 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 110 [2022-11-21 16:45:39,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 106 transitions, 300 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:39,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:45:39,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 110 [2022-11-21 16:45:39,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:45:39,886 INFO L130 PetriNetUnfolder]: 0/57 cut-off events. [2022-11-21 16:45:39,886 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-21 16:45:39,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 57 events. 0/57 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 20 event pairs, 0 based on Foata normal form. 2/59 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-11-21 16:45:39,887 INFO L137 encePairwiseOnDemand]: 105/110 looper letters, 10 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2022-11-21 16:45:39,887 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 51 transitions, 156 flow [2022-11-21 16:45:39,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:45:39,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-21 16:45:39,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 586 transitions. [2022-11-21 16:45:39,890 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.591919191919192 [2022-11-21 16:45:39,890 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 586 transitions. [2022-11-21 16:45:39,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 586 transitions. [2022-11-21 16:45:39,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:45:39,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 586 transitions. [2022-11-21 16:45:39,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 65.11111111111111) internal successors, (586), 9 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:39,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 110.0) internal successors, (1100), 10 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:39,895 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 110.0) internal successors, (1100), 10 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:39,896 INFO L175 Difference]: Start difference. First operand has 107 places, 106 transitions, 300 flow. Second operand 9 states and 586 transitions. [2022-11-21 16:45:39,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 51 transitions, 156 flow [2022-11-21 16:45:39,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 51 transitions, 152 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-21 16:45:39,898 INFO L231 Difference]: Finished difference. Result has 62 places, 47 transitions, 124 flow [2022-11-21 16:45:39,898 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=124, PETRI_PLACES=62, PETRI_TRANSITIONS=47} [2022-11-21 16:45:39,899 INFO L288 CegarLoopForPetriNet]: 105 programPoint places, -43 predicate places. [2022-11-21 16:45:39,899 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 47 transitions, 124 flow [2022-11-21 16:45:39,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:39,900 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:45:39,900 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:45:39,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec04e61-578a-46a5-9fd3-59bef409f15d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:45:40,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec04e61-578a-46a5-9fd3-59bef409f15d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-21 16:45:40,106 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:45:40,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:40,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1479036618, now seen corresponding path program 1 times [2022-11-21 16:45:40,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:45:40,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854408000] [2022-11-21 16:45:40,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:40,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:45:40,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:45:40,127 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 16:45:40,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:45:40,144 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 16:45:40,145 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 16:45:40,145 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-21 16:45:40,145 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-21 16:45:40,146 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2022-11-21 16:45:40,146 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-21 16:45:40,146 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-21 16:45:40,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 16:45:40,146 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-21 16:45:40,147 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 16:45:40,147 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-21 16:45:40,208 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2022-11-21 16:45:40,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 129 transitions, 336 flow [2022-11-21 16:45:40,570 INFO L130 PetriNetUnfolder]: 496/2280 cut-off events. [2022-11-21 16:45:40,572 INFO L131 PetriNetUnfolder]: For 419/419 co-relation queries the response was YES. [2022-11-21 16:45:40,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2731 conditions, 2280 events. 496/2280 cut-off events. For 419/419 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 14946 event pairs, 64 based on Foata normal form. 0/1960 useless extension candidates. Maximal degree in co-relation 1399. Up to 192 conditions per place. [2022-11-21 16:45:40,585 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 129 transitions, 336 flow [2022-11-21 16:45:40,600 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 129 transitions, 336 flow [2022-11-21 16:45:40,601 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:45:40,608 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;@2f3ee3ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:45:40,608 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-21 16:45:40,616 INFO L130 PetriNetUnfolder]: 5/67 cut-off events. [2022-11-21 16:45:40,616 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 16:45:40,617 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:45:40,617 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:45:40,619 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-21 16:45:40,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:40,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1295698664, now seen corresponding path program 1 times [2022-11-21 16:45:40,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:45:40,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576870526] [2022-11-21 16:45:40,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:40,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:45:40,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:40,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:45:40,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:45:40,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576870526] [2022-11-21 16:45:40,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576870526] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:45:40,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:45:40,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:45:40,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415371787] [2022-11-21 16:45:40,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:45:40,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 16:45:40,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:45:40,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 16:45:40,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:45:40,657 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 129 [2022-11-21 16:45:40,658 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 129 transitions, 336 flow. Second operand has 2 states, 2 states have (on average 102.0) internal successors, (204), 2 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:40,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:45:40,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 129 [2022-11-21 16:45:40,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:45:41,095 INFO L130 PetriNetUnfolder]: 336/2108 cut-off events. [2022-11-21 16:45:41,095 INFO L131 PetriNetUnfolder]: For 1217/1217 co-relation queries the response was YES. [2022-11-21 16:45:41,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2959 conditions, 2108 events. 336/2108 cut-off events. For 1217/1217 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 14781 event pairs, 32 based on Foata normal form. 358/2306 useless extension candidates. Maximal degree in co-relation 1473. Up to 400 conditions per place. [2022-11-21 16:45:41,111 INFO L137 encePairwiseOnDemand]: 122/129 looper letters, 18 selfloop transitions, 0 changer transitions 0/119 dead transitions. [2022-11-21 16:45:41,112 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 119 transitions, 352 flow [2022-11-21 16:45:41,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 16:45:41,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 16:45:41,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 227 transitions. [2022-11-21 16:45:41,113 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8798449612403101 [2022-11-21 16:45:41,113 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 227 transitions. [2022-11-21 16:45:41,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 227 transitions. [2022-11-21 16:45:41,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:45:41,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 227 transitions. [2022-11-21 16:45:41,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 113.5) internal successors, (227), 2 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:41,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:41,116 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:41,117 INFO L175 Difference]: Start difference. First operand has 123 places, 129 transitions, 336 flow. Second operand 2 states and 227 transitions. [2022-11-21 16:45:41,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 119 transitions, 352 flow [2022-11-21 16:45:41,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 119 transitions, 352 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 16:45:41,124 INFO L231 Difference]: Finished difference. Result has 121 places, 119 transitions, 316 flow [2022-11-21 16:45:41,125 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=316, PETRI_PLACES=121, PETRI_TRANSITIONS=119} [2022-11-21 16:45:41,126 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, -2 predicate places. [2022-11-21 16:45:41,127 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 119 transitions, 316 flow [2022-11-21 16:45:41,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 102.0) internal successors, (204), 2 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:41,127 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:45:41,127 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:45:41,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 16:45:41,128 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-21 16:45:41,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:41,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1099185159, now seen corresponding path program 1 times [2022-11-21 16:45:41,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:45:41,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004701139] [2022-11-21 16:45:41,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:41,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:45:41,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:41,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:45:41,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:45:41,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004701139] [2022-11-21 16:45:41,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004701139] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:45:41,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:45:41,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:45:41,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041715604] [2022-11-21 16:45:41,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:45:41,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:45:41,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:45:41,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:45:41,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:45:41,198 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 129 [2022-11-21 16:45:41,198 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 119 transitions, 316 flow. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:41,198 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:45:41,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 129 [2022-11-21 16:45:41,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:45:41,802 INFO L130 PetriNetUnfolder]: 444/2469 cut-off events. [2022-11-21 16:45:41,802 INFO L131 PetriNetUnfolder]: For 592/592 co-relation queries the response was YES. [2022-11-21 16:45:41,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4691 conditions, 2469 events. 444/2469 cut-off events. For 592/592 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 19494 event pairs, 10 based on Foata normal form. 0/2328 useless extension candidates. Maximal degree in co-relation 4682. Up to 1054 conditions per place. [2022-11-21 16:45:41,820 INFO L137 encePairwiseOnDemand]: 117/129 looper letters, 63 selfloop transitions, 8 changer transitions 0/147 dead transitions. [2022-11-21 16:45:41,820 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 147 transitions, 550 flow [2022-11-21 16:45:41,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:45:41,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 16:45:41,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 303 transitions. [2022-11-21 16:45:41,822 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7829457364341085 [2022-11-21 16:45:41,822 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 303 transitions. [2022-11-21 16:45:41,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 303 transitions. [2022-11-21 16:45:41,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:45:41,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 303 transitions. [2022-11-21 16:45:41,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:41,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:41,825 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:41,825 INFO L175 Difference]: Start difference. First operand has 121 places, 119 transitions, 316 flow. Second operand 3 states and 303 transitions. [2022-11-21 16:45:41,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 147 transitions, 550 flow [2022-11-21 16:45:41,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 147 transitions, 550 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 16:45:41,892 INFO L231 Difference]: Finished difference. Result has 124 places, 123 transitions, 364 flow [2022-11-21 16:45:41,892 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=364, PETRI_PLACES=124, PETRI_TRANSITIONS=123} [2022-11-21 16:45:41,892 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 1 predicate places. [2022-11-21 16:45:41,893 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 123 transitions, 364 flow [2022-11-21 16:45:41,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:41,893 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:45:41,893 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:45:41,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 16:45:41,893 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-21 16:45:41,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:41,894 INFO L85 PathProgramCache]: Analyzing trace with hash -524673210, now seen corresponding path program 1 times [2022-11-21 16:45:41,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:45:41,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884808406] [2022-11-21 16:45:41,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:41,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:45:41,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:42,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:45:42,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:45:42,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884808406] [2022-11-21 16:45:42,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884808406] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:45:42,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701951090] [2022-11-21 16:45:42,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:42,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:45:42,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec04e61-578a-46a5-9fd3-59bef409f15d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:45:42,015 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec04e61-578a-46a5-9fd3-59bef409f15d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:45:42,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec04e61-578a-46a5-9fd3-59bef409f15d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:45:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:42,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 16:45:42,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:45:42,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:45:42,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:45:42,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:45:42,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701951090] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:45:42,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:45:42,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-21 16:45:42,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718924012] [2022-11-21 16:45:42,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:45:42,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 16:45:42,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:45:42,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 16:45:42,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:45:42,229 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 129 [2022-11-21 16:45:42,230 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 123 transitions, 364 flow. Second operand has 10 states, 10 states have (on average 76.8) internal successors, (768), 10 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:42,230 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:45:42,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 129 [2022-11-21 16:45:42,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:45:42,995 INFO L130 PetriNetUnfolder]: 423/2263 cut-off events. [2022-11-21 16:45:42,995 INFO L131 PetriNetUnfolder]: For 683/683 co-relation queries the response was YES. [2022-11-21 16:45:43,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4772 conditions, 2263 events. 423/2263 cut-off events. For 683/683 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 17642 event pairs, 35 based on Foata normal form. 2/2262 useless extension candidates. Maximal degree in co-relation 4761. Up to 482 conditions per place. [2022-11-21 16:45:43,011 INFO L137 encePairwiseOnDemand]: 114/129 looper letters, 59 selfloop transitions, 21 changer transitions 0/154 dead transitions. [2022-11-21 16:45:43,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 154 transitions, 624 flow [2022-11-21 16:45:43,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 16:45:43,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-21 16:45:43,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 822 transitions. [2022-11-21 16:45:43,014 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6372093023255814 [2022-11-21 16:45:43,014 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 822 transitions. [2022-11-21 16:45:43,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 822 transitions. [2022-11-21 16:45:43,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:45:43,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 822 transitions. [2022-11-21 16:45:43,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 82.2) internal successors, (822), 10 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:43,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 129.0) internal successors, (1419), 11 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:43,020 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 129.0) internal successors, (1419), 11 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:43,020 INFO L175 Difference]: Start difference. First operand has 124 places, 123 transitions, 364 flow. Second operand 10 states and 822 transitions. [2022-11-21 16:45:43,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 154 transitions, 624 flow [2022-11-21 16:45:43,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 154 transitions, 616 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 16:45:43,026 INFO L231 Difference]: Finished difference. Result has 135 places, 132 transitions, 456 flow [2022-11-21 16:45:43,026 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=456, PETRI_PLACES=135, PETRI_TRANSITIONS=132} [2022-11-21 16:45:43,026 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 12 predicate places. [2022-11-21 16:45:43,027 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 132 transitions, 456 flow [2022-11-21 16:45:43,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 76.8) internal successors, (768), 10 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:43,027 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:45:43,027 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:45:43,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec04e61-578a-46a5-9fd3-59bef409f15d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 16:45:43,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec04e61-578a-46a5-9fd3-59bef409f15d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-21 16:45:43,233 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-21 16:45:43,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:43,234 INFO L85 PathProgramCache]: Analyzing trace with hash 531540147, now seen corresponding path program 1 times [2022-11-21 16:45:43,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:45:43,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794930113] [2022-11-21 16:45:43,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:43,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:45:43,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:45:43,261 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 16:45:43,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:45:43,300 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 16:45:43,300 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 16:45:43,301 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-21 16:45:43,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-21 16:45:43,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-11-21 16:45:43,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-21 16:45:43,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-21 16:45:43,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-21 16:45:43,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-21 16:45:43,302 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-21 16:45:43,303 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 16:45:43,303 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-21 16:45:43,366 INFO L144 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2022-11-21 16:45:43,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 148 transitions, 408 flow [2022-11-21 16:45:44,953 INFO L130 PetriNetUnfolder]: 2379/8746 cut-off events. [2022-11-21 16:45:44,954 INFO L131 PetriNetUnfolder]: For 2144/2144 co-relation queries the response was YES. [2022-11-21 16:45:45,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10911 conditions, 8746 events. 2379/8746 cut-off events. For 2144/2144 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 74818 event pairs, 626 based on Foata normal form. 0/7622 useless extension candidates. Maximal degree in co-relation 5388. Up to 1024 conditions per place. [2022-11-21 16:45:45,010 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 148 transitions, 408 flow [2022-11-21 16:45:45,066 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 148 transitions, 408 flow [2022-11-21 16:45:45,067 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:45:45,068 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;@2f3ee3ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:45:45,068 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-21 16:45:45,073 INFO L130 PetriNetUnfolder]: 4/65 cut-off events. [2022-11-21 16:45:45,074 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 16:45:45,074 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:45:45,074 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:45:45,074 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 16:45:45,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:45,075 INFO L85 PathProgramCache]: Analyzing trace with hash 404176023, now seen corresponding path program 1 times [2022-11-21 16:45:45,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:45:45,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949648806] [2022-11-21 16:45:45,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:45,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:45:45,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:45,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:45:45,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:45:45,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949648806] [2022-11-21 16:45:45,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949648806] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:45:45,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:45:45,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:45:45,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584023489] [2022-11-21 16:45:45,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:45:45,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 16:45:45,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:45:45,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 16:45:45,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:45:45,099 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 148 [2022-11-21 16:45:45,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 148 transitions, 408 flow. Second operand has 2 states, 2 states have (on average 113.0) internal successors, (226), 2 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:45,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:45:45,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 148 [2022-11-21 16:45:45,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:45:46,706 INFO L130 PetriNetUnfolder]: 1817/8164 cut-off events. [2022-11-21 16:45:46,707 INFO L131 PetriNetUnfolder]: For 6300/6300 co-relation queries the response was YES. [2022-11-21 16:45:46,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12402 conditions, 8164 events. 1817/8164 cut-off events. For 6300/6300 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 74512 event pairs, 313 based on Foata normal form. 1608/9210 useless extension candidates. Maximal degree in co-relation 5991. Up to 2073 conditions per place. [2022-11-21 16:45:46,782 INFO L137 encePairwiseOnDemand]: 140/148 looper letters, 24 selfloop transitions, 0 changer transitions 0/136 dead transitions. [2022-11-21 16:45:46,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 136 transitions, 432 flow [2022-11-21 16:45:46,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 16:45:46,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 16:45:46,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 256 transitions. [2022-11-21 16:45:46,784 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8648648648648649 [2022-11-21 16:45:46,784 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 256 transitions. [2022-11-21 16:45:46,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 256 transitions. [2022-11-21 16:45:46,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:45:46,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 256 transitions. [2022-11-21 16:45:46,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 128.0) internal successors, (256), 2 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:46,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:46,787 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:46,787 INFO L175 Difference]: Start difference. First operand has 141 places, 148 transitions, 408 flow. Second operand 2 states and 256 transitions. [2022-11-21 16:45:46,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 136 transitions, 432 flow [2022-11-21 16:45:46,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 136 transitions, 432 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 16:45:46,795 INFO L231 Difference]: Finished difference. Result has 138 places, 136 transitions, 384 flow [2022-11-21 16:45:46,795 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=384, PETRI_PLACES=138, PETRI_TRANSITIONS=136} [2022-11-21 16:45:46,797 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, -3 predicate places. [2022-11-21 16:45:46,797 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 136 transitions, 384 flow [2022-11-21 16:45:46,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 113.0) internal successors, (226), 2 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:46,797 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:45:46,798 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:45:46,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-21 16:45:46,798 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 16:45:46,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:46,799 INFO L85 PathProgramCache]: Analyzing trace with hash 207662518, now seen corresponding path program 1 times [2022-11-21 16:45:46,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:45:46,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327856261] [2022-11-21 16:45:46,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:46,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:45:46,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:46,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:45:46,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:45:46,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327856261] [2022-11-21 16:45:46,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327856261] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:45:46,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:45:46,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:45:46,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343594412] [2022-11-21 16:45:46,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:45:46,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:45:46,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:45:46,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:45:46,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:45:46,841 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 148 [2022-11-21 16:45:46,841 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 136 transitions, 384 flow. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:46,841 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:45:46,842 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 148 [2022-11-21 16:45:46,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:45:48,929 INFO L130 PetriNetUnfolder]: 2570/10361 cut-off events. [2022-11-21 16:45:48,929 INFO L131 PetriNetUnfolder]: For 3152/3152 co-relation queries the response was YES. [2022-11-21 16:45:48,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20629 conditions, 10361 events. 2570/10361 cut-off events. For 3152/3152 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 102809 event pairs, 152 based on Foata normal form. 0/9823 useless extension candidates. Maximal degree in co-relation 20618. Up to 4843 conditions per place. [2022-11-21 16:45:49,008 INFO L137 encePairwiseOnDemand]: 136/148 looper letters, 73 selfloop transitions, 8 changer transitions 0/168 dead transitions. [2022-11-21 16:45:49,008 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 168 transitions, 658 flow [2022-11-21 16:45:49,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:45:49,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 16:45:49,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 346 transitions. [2022-11-21 16:45:49,023 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7792792792792793 [2022-11-21 16:45:49,023 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 346 transitions. [2022-11-21 16:45:49,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 346 transitions. [2022-11-21 16:45:49,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:45:49,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 346 transitions. [2022-11-21 16:45:49,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:49,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:49,027 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:49,027 INFO L175 Difference]: Start difference. First operand has 138 places, 136 transitions, 384 flow. Second operand 3 states and 346 transitions. [2022-11-21 16:45:49,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 168 transitions, 658 flow [2022-11-21 16:45:49,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 168 transitions, 658 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 16:45:49,035 INFO L231 Difference]: Finished difference. Result has 141 places, 140 transitions, 432 flow [2022-11-21 16:45:49,037 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=432, PETRI_PLACES=141, PETRI_TRANSITIONS=140} [2022-11-21 16:45:49,038 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 0 predicate places. [2022-11-21 16:45:49,038 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 140 transitions, 432 flow [2022-11-21 16:45:49,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:49,038 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:45:49,039 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:45:49,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-21 16:45:49,039 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 16:45:49,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:49,040 INFO L85 PathProgramCache]: Analyzing trace with hash 676761736, now seen corresponding path program 1 times [2022-11-21 16:45:49,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:45:49,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595786221] [2022-11-21 16:45:49,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:49,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:45:49,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:49,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:45:49,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:45:49,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595786221] [2022-11-21 16:45:49,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595786221] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:45:49,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497971780] [2022-11-21 16:45:49,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:49,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:45:49,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec04e61-578a-46a5-9fd3-59bef409f15d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:45:49,168 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec04e61-578a-46a5-9fd3-59bef409f15d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:45:49,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec04e61-578a-46a5-9fd3-59bef409f15d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:45:49,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:49,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 16:45:49,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:45:49,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:45:49,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:45:49,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:45:49,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497971780] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:45:49,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:45:49,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-21 16:45:49,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052443458] [2022-11-21 16:45:49,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:45:49,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 16:45:49,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:45:49,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 16:45:49,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:45:49,373 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 148 [2022-11-21 16:45:49,374 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 140 transitions, 432 flow. Second operand has 10 states, 10 states have (on average 87.8) internal successors, (878), 10 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:49,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:45:49,375 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 148 [2022-11-21 16:45:49,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:45:51,384 INFO L130 PetriNetUnfolder]: 2538/10077 cut-off events. [2022-11-21 16:45:51,384 INFO L131 PetriNetUnfolder]: For 3601/3601 co-relation queries the response was YES. [2022-11-21 16:45:51,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21963 conditions, 10077 events. 2538/10077 cut-off events. For 3601/3601 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 103263 event pairs, 214 based on Foata normal form. 2/10071 useless extension candidates. Maximal degree in co-relation 21950. Up to 2161 conditions per place. [2022-11-21 16:45:51,456 INFO L137 encePairwiseOnDemand]: 133/148 looper letters, 69 selfloop transitions, 21 changer transitions 0/175 dead transitions. [2022-11-21 16:45:51,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 175 transitions, 732 flow [2022-11-21 16:45:51,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 16:45:51,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-21 16:45:51,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 942 transitions. [2022-11-21 16:45:51,460 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6364864864864865 [2022-11-21 16:45:51,460 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 942 transitions. [2022-11-21 16:45:51,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 942 transitions. [2022-11-21 16:45:51,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:45:51,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 942 transitions. [2022-11-21 16:45:51,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 94.2) internal successors, (942), 10 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:51,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 148.0) internal successors, (1628), 11 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:51,468 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 148.0) internal successors, (1628), 11 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:51,468 INFO L175 Difference]: Start difference. First operand has 141 places, 140 transitions, 432 flow. Second operand 10 states and 942 transitions. [2022-11-21 16:45:51,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 175 transitions, 732 flow [2022-11-21 16:45:51,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 175 transitions, 724 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 16:45:51,482 INFO L231 Difference]: Finished difference. Result has 152 places, 149 transitions, 524 flow [2022-11-21 16:45:51,483 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=524, PETRI_PLACES=152, PETRI_TRANSITIONS=149} [2022-11-21 16:45:51,483 INFO L288 CegarLoopForPetriNet]: 141 programPoint places, 11 predicate places. [2022-11-21 16:45:51,484 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 149 transitions, 524 flow [2022-11-21 16:45:51,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 87.8) internal successors, (878), 10 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:51,484 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:45:51,485 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:45:51,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec04e61-578a-46a5-9fd3-59bef409f15d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 16:45:51,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ec04e61-578a-46a5-9fd3-59bef409f15d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-21 16:45:51,691 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 16:45:51,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:51,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1377560969, now seen corresponding path program 1 times [2022-11-21 16:45:51,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:45:51,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597273200] [2022-11-21 16:45:51,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:51,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:45:51,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:51,840 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-21 16:45:51,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:45:51,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597273200] [2022-11-21 16:45:51,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597273200] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:45:51,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:45:51,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:45:51,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684393785] [2022-11-21 16:45:51,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:45:51,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:45:51,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:45:51,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:45:51,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:45:51,846 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 148 [2022-11-21 16:45:51,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 149 transitions, 524 flow. Second operand has 4 states, 4 states have (on average 95.75) internal successors, (383), 4 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:51,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:45:51,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 148 [2022-11-21 16:45:51,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand