./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945c972e-b43d-48f4-934d-6bf0576a505c/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945c972e-b43d-48f4-934d-6bf0576a505c/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945c972e-b43d-48f4-934d-6bf0576a505c/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945c972e-b43d-48f4-934d-6bf0576a505c/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945c972e-b43d-48f4-934d-6bf0576a505c/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945c972e-b43d-48f4-934d-6bf0576a505c/bin/uautomizer-ZsLfNo2U6R --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 1fe12ce8951e45860142b9cebaa325eef531c18fa917882c03ee5396afb187f5 --- 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-38b53e6 [2022-11-25 15:25:32,677 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:25:32,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:25:32,706 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:25:32,707 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:25:32,708 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:25:32,710 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:25:32,712 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:25:32,715 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:25:32,716 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:25:32,717 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:25:32,719 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:25:32,720 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:25:32,721 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:25:32,731 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:25:32,733 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:25:32,734 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:25:32,735 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:25:32,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:25:32,744 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:25:32,753 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:25:32,755 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:25:32,756 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:25:32,757 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:25:32,764 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:25:32,773 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:25:32,773 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:25:32,774 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:25:32,775 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:25:32,776 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:25:32,777 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:25:32,777 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:25:32,778 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:25:32,779 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:25:32,784 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:25:32,784 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:25:32,785 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:25:32,787 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:25:32,787 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:25:32,788 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:25:32,791 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:25:32,793 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945c972e-b43d-48f4-934d-6bf0576a505c/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 15:25:32,829 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:25:32,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:25:32,837 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:25:32,837 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:25:32,838 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:25:32,839 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:25:32,839 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:25:32,840 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:25:32,840 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:25:32,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:25:32,842 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:25:32,842 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:25:32,842 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:25:32,843 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:25:32,843 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 15:25:32,843 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:25:32,843 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 15:25:32,844 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:25:32,844 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 15:25:32,844 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:25:32,844 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 15:25:32,845 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:25:32,845 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:25:32,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:25:32,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:25:32,846 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:25:32,846 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:25:32,846 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 15:25:32,846 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:25:32,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:25:32,847 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:25:32,847 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 15:25:32,848 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:25:32,848 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:25:32,848 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945c972e-b43d-48f4-934d-6bf0576a505c/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945c972e-b43d-48f4-934d-6bf0576a505c/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fe12ce8951e45860142b9cebaa325eef531c18fa917882c03ee5396afb187f5 [2022-11-25 15:25:33,178 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:25:33,226 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:25:33,229 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:25:33,231 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:25:33,231 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:25:33,233 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945c972e-b43d-48f4-934d-6bf0576a505c/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i [2022-11-25 15:25:36,727 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:25:37,163 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:25:37,169 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945c972e-b43d-48f4-934d-6bf0576a505c/sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i [2022-11-25 15:25:37,193 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945c972e-b43d-48f4-934d-6bf0576a505c/bin/uautomizer-ZsLfNo2U6R/data/e1a72513c/24b6d56df49d408eb376189dc1955a5f/FLAGffb0b30e3 [2022-11-25 15:25:37,217 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945c972e-b43d-48f4-934d-6bf0576a505c/bin/uautomizer-ZsLfNo2U6R/data/e1a72513c/24b6d56df49d408eb376189dc1955a5f [2022-11-25 15:25:37,224 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:25:37,227 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:25:37,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:25:37,234 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:25:37,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:25:37,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:25:37" (1/1) ... [2022-11-25 15:25:37,243 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79197c74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:25:37, skipping insertion in model container [2022-11-25 15:25:37,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:25:37" (1/1) ... [2022-11-25 15:25:37,253 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:25:37,310 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:25:37,734 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_945c972e-b43d-48f4-934d-6bf0576a505c/sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i[30176,30189] [2022-11-25 15:25:37,780 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:25:37,795 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:25:37,865 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_945c972e-b43d-48f4-934d-6bf0576a505c/sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i[30176,30189] [2022-11-25 15:25:37,891 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:25:37,937 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:25:37,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:25:37 WrapperNode [2022-11-25 15:25:37,938 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:25:37,940 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:25:37,940 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:25:37,940 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:25:37,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:25:37" (1/1) ... [2022-11-25 15:25:37,989 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:25:37" (1/1) ... [2022-11-25 15:25:38,021 INFO L138 Inliner]: procedures = 172, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 106 [2022-11-25 15:25:38,026 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:25:38,027 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:25:38,027 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:25:38,027 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:25:38,041 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:25:37" (1/1) ... [2022-11-25 15:25:38,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:25:37" (1/1) ... [2022-11-25 15:25:38,044 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:25:37" (1/1) ... [2022-11-25 15:25:38,044 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:25:37" (1/1) ... [2022-11-25 15:25:38,052 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:25:37" (1/1) ... [2022-11-25 15:25:38,058 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:25:37" (1/1) ... [2022-11-25 15:25:38,060 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:25:37" (1/1) ... [2022-11-25 15:25:38,062 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:25:37" (1/1) ... [2022-11-25 15:25:38,065 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:25:38,066 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:25:38,066 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:25:38,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:25:38,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:25:37" (1/1) ... [2022-11-25 15:25:38,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:25:38,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945c972e-b43d-48f4-934d-6bf0576a505c/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:25:38,110 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945c972e-b43d-48f4-934d-6bf0576a505c/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:25:38,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945c972e-b43d-48f4-934d-6bf0576a505c/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:25:38,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 15:25:38,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 15:25:38,159 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 15:25:38,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:25:38,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 15:25:38,160 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-25 15:25:38,160 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-25 15:25:38,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 15:25:38,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 15:25:38,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:25:38,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:25:38,164 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 15:25:38,320 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:25:38,323 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:25:38,612 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:25:38,621 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:25:38,621 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-25 15:25:38,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:25:38 BoogieIcfgContainer [2022-11-25 15:25:38,637 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:25:38,640 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:25:38,640 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:25:38,661 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:25:38,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:25:37" (1/3) ... [2022-11-25 15:25:38,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c890c6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:25:38, skipping insertion in model container [2022-11-25 15:25:38,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:25:37" (2/3) ... [2022-11-25 15:25:38,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c890c6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:25:38, skipping insertion in model container [2022-11-25 15:25:38,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:25:38" (3/3) ... [2022-11-25 15:25:38,664 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_05-lockfuns_racefree.i [2022-11-25 15:25:38,675 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 15:25:38,698 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:25:38,698 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 15:25:38,698 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 15:25:38,853 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-25 15:25:38,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 115 transitions, 238 flow [2022-11-25 15:25:38,992 INFO L130 PetriNetUnfolder]: 17/156 cut-off events. [2022-11-25 15:25:38,993 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 15:25:39,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 156 events. 17/156 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 381 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 79. Up to 4 conditions per place. [2022-11-25 15:25:39,001 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 115 transitions, 238 flow [2022-11-25 15:25:39,007 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 110 transitions, 225 flow [2022-11-25 15:25:39,012 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:25:39,030 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 110 transitions, 225 flow [2022-11-25 15:25:39,035 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 110 transitions, 225 flow [2022-11-25 15:25:39,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 110 transitions, 225 flow [2022-11-25 15:25:39,083 INFO L130 PetriNetUnfolder]: 16/151 cut-off events. [2022-11-25 15:25:39,083 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:25:39,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 151 events. 16/151 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 370 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 79. Up to 4 conditions per place. [2022-11-25 15:25:39,088 INFO L119 LiptonReduction]: Number of co-enabled transitions 3102 [2022-11-25 15:25:43,494 INFO L134 LiptonReduction]: Checked pairs total: 4214 [2022-11-25 15:25:43,494 INFO L136 LiptonReduction]: Total number of compositions: 101 [2022-11-25 15:25:43,516 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:25:43,524 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;@2010e14d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:25:43,524 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-25 15:25:43,529 INFO L130 PetriNetUnfolder]: 1/9 cut-off events. [2022-11-25 15:25:43,529 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:25:43,530 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:25:43,531 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 15:25:43,531 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:25:43,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:25:43,538 INFO L85 PathProgramCache]: Analyzing trace with hash 13907935, now seen corresponding path program 1 times [2022-11-25 15:25:43,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:25:43,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669926403] [2022-11-25 15:25:43,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:25:43,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:25:43,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:25:43,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:25:43,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:25:43,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669926403] [2022-11-25 15:25:43,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669926403] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:25:43,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:25:43,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:25:43,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501246199] [2022-11-25 15:25:43,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:25:43,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:25:43,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:25:43,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:25:43,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:25:44,006 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 216 [2022-11-25 15:25:44,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 30 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:25:44,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:25:44,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 216 [2022-11-25 15:25:44,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:25:44,157 INFO L130 PetriNetUnfolder]: 72/174 cut-off events. [2022-11-25 15:25:44,157 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:25:44,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 352 conditions, 174 events. 72/174 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 699 event pairs, 0 based on Foata normal form. 10/166 useless extension candidates. Maximal degree in co-relation 323. Up to 154 conditions per place. [2022-11-25 15:25:44,166 INFO L137 encePairwiseOnDemand]: 204/216 looper letters, 22 selfloop transitions, 2 changer transitions 4/30 dead transitions. [2022-11-25 15:25:44,166 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 30 transitions, 121 flow [2022-11-25 15:25:44,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:25:44,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:25:44,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 335 transitions. [2022-11-25 15:25:44,195 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5169753086419753 [2022-11-25 15:25:44,196 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 335 transitions. [2022-11-25 15:25:44,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 335 transitions. [2022-11-25 15:25:44,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:25:44,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 335 transitions. [2022-11-25 15:25:44,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:25:44,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:25:44,214 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:25:44,216 INFO L175 Difference]: Start difference. First operand has 25 places, 30 transitions, 65 flow. Second operand 3 states and 335 transitions. [2022-11-25 15:25:44,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 30 transitions, 121 flow [2022-11-25 15:25:44,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 30 transitions, 121 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 15:25:44,229 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 47 flow [2022-11-25 15:25:44,232 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2022-11-25 15:25:44,236 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2022-11-25 15:25:44,240 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 47 flow [2022-11-25 15:25:44,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:25:44,241 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:25:44,242 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-11-25 15:25:44,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 15:25:44,242 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:25:44,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:25:44,245 INFO L85 PathProgramCache]: Analyzing trace with hash 452362413, now seen corresponding path program 1 times [2022-11-25 15:25:44,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:25:44,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541776513] [2022-11-25 15:25:44,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:25:44,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:25:44,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:25:44,288 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 15:25:44,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:25:44,363 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 15:25:44,364 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 15:25:44,366 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-25 15:25:44,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-25 15:25:44,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 15:25:44,369 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-25 15:25:44,373 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 15:25:44,373 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 15:25:44,411 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 15:25:44,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 150 transitions, 318 flow [2022-11-25 15:25:44,460 INFO L130 PetriNetUnfolder]: 31/257 cut-off events. [2022-11-25 15:25:44,460 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 15:25:44,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 257 events. 31/257 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 802 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 158. Up to 8 conditions per place. [2022-11-25 15:25:44,464 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 150 transitions, 318 flow [2022-11-25 15:25:44,466 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 150 transitions, 318 flow [2022-11-25 15:25:44,467 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:25:44,467 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 150 transitions, 318 flow [2022-11-25 15:25:44,468 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 150 transitions, 318 flow [2022-11-25 15:25:44,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 150 transitions, 318 flow [2022-11-25 15:25:44,508 INFO L130 PetriNetUnfolder]: 31/257 cut-off events. [2022-11-25 15:25:44,508 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 15:25:44,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 257 events. 31/257 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 802 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 158. Up to 8 conditions per place. [2022-11-25 15:25:44,520 INFO L119 LiptonReduction]: Number of co-enabled transitions 9108 [2022-11-25 15:25:48,837 INFO L134 LiptonReduction]: Checked pairs total: 17832 [2022-11-25 15:25:48,838 INFO L136 LiptonReduction]: Total number of compositions: 129 [2022-11-25 15:25:48,841 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:25:48,842 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;@2010e14d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:25:48,843 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-25 15:25:48,847 INFO L130 PetriNetUnfolder]: 1/9 cut-off events. [2022-11-25 15:25:48,847 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:25:48,847 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:25:48,848 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 15:25:48,848 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:25:48,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:25:48,849 INFO L85 PathProgramCache]: Analyzing trace with hash 23573773, now seen corresponding path program 1 times [2022-11-25 15:25:48,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:25:48,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123320898] [2022-11-25 15:25:48,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:25:48,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:25:48,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:25:48,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:25:48,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:25:48,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123320898] [2022-11-25 15:25:48,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123320898] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:25:48,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:25:48,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:25:48,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486271224] [2022-11-25 15:25:48,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:25:48,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:25:48,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:25:48,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:25:48,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:25:48,935 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 279 [2022-11-25 15:25:48,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:25:48,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:25:48,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 279 [2022-11-25 15:25:48,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:25:49,443 INFO L130 PetriNetUnfolder]: 1642/2913 cut-off events. [2022-11-25 15:25:49,444 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-25 15:25:49,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5667 conditions, 2913 events. 1642/2913 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 17145 event pairs, 752 based on Foata normal form. 214/2810 useless extension candidates. Maximal degree in co-relation 585. Up to 2673 conditions per place. [2022-11-25 15:25:49,457 INFO L137 encePairwiseOnDemand]: 262/279 looper letters, 32 selfloop transitions, 2 changer transitions 9/51 dead transitions. [2022-11-25 15:25:49,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 204 flow [2022-11-25 15:25:49,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:25:49,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:25:49,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 435 transitions. [2022-11-25 15:25:49,461 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5197132616487455 [2022-11-25 15:25:49,461 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 435 transitions. [2022-11-25 15:25:49,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 435 transitions. [2022-11-25 15:25:49,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:25:49,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 435 transitions. [2022-11-25 15:25:49,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:25:49,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 279.0) internal successors, (1116), 4 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:25:49,469 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 279.0) internal successors, (1116), 4 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:25:49,469 INFO L175 Difference]: Start difference. First operand has 44 places, 55 transitions, 128 flow. Second operand 3 states and 435 transitions. [2022-11-25 15:25:49,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 204 flow [2022-11-25 15:25:49,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 204 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 15:25:49,472 INFO L231 Difference]: Finished difference. Result has 47 places, 33 transitions, 88 flow [2022-11-25 15:25:49,472 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=47, PETRI_TRANSITIONS=33} [2022-11-25 15:25:49,473 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2022-11-25 15:25:49,473 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 33 transitions, 88 flow [2022-11-25 15:25:49,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:25:49,474 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:25:49,474 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:25:49,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 15:25:49,475 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:25:49,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:25:49,476 INFO L85 PathProgramCache]: Analyzing trace with hash -265148568, now seen corresponding path program 1 times [2022-11-25 15:25:49,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:25:49,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477577329] [2022-11-25 15:25:49,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:25:49,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:25:49,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:25:49,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:25:49,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:25:49,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477577329] [2022-11-25 15:25:49,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477577329] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:25:49,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407550719] [2022-11-25 15:25:49,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:25:49,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:25:49,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945c972e-b43d-48f4-934d-6bf0576a505c/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:25:49,565 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945c972e-b43d-48f4-934d-6bf0576a505c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:25:49,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945c972e-b43d-48f4-934d-6bf0576a505c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 15:25:49,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:25:49,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 15:25:49,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:25:49,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:25:49,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:25:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:25:49,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407550719] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:25:49,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:25:49,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 15:25:49,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835016249] [2022-11-25 15:25:49,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:25:49,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:25:49,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:25:49,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:25:49,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:25:49,864 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 279 [2022-11-25 15:25:49,866 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 33 transitions, 88 flow. Second operand has 7 states, 7 states have (on average 125.28571428571429) internal successors, (877), 7 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:25:49,882 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:25:49,883 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 279 [2022-11-25 15:25:49,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:25:50,141 INFO L130 PetriNetUnfolder]: 376/769 cut-off events. [2022-11-25 15:25:50,142 INFO L131 PetriNetUnfolder]: For 180/180 co-relation queries the response was YES. [2022-11-25 15:25:50,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1714 conditions, 769 events. 376/769 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3941 event pairs, 0 based on Foata normal form. 90/858 useless extension candidates. Maximal degree in co-relation 190. Up to 450 conditions per place. [2022-11-25 15:25:50,154 INFO L137 encePairwiseOnDemand]: 276/279 looper letters, 45 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2022-11-25 15:25:50,155 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 56 transitions, 228 flow [2022-11-25 15:25:50,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:25:50,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 15:25:50,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 665 transitions. [2022-11-25 15:25:50,159 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4767025089605735 [2022-11-25 15:25:50,160 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 665 transitions. [2022-11-25 15:25:50,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 665 transitions. [2022-11-25 15:25:50,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:25:50,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 665 transitions. [2022-11-25 15:25:50,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:25:50,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 279.0) internal successors, (1674), 6 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:25:50,175 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 279.0) internal successors, (1674), 6 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:25:50,176 INFO L175 Difference]: Start difference. First operand has 47 places, 33 transitions, 88 flow. Second operand 5 states and 665 transitions. [2022-11-25 15:25:50,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 56 transitions, 228 flow [2022-11-25 15:25:50,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 56 transitions, 224 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 15:25:50,184 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2022-11-25 15:25:50,184 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2022-11-25 15:25:50,187 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2022-11-25 15:25:50,188 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2022-11-25 15:25:50,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 125.28571428571429) internal successors, (877), 7 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:25:50,189 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:25:50,189 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-25 15:25:50,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945c972e-b43d-48f4-934d-6bf0576a505c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 15:25:50,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945c972e-b43d-48f4-934d-6bf0576a505c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:25:50,400 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:25:50,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:25:50,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1840533837, now seen corresponding path program 1 times [2022-11-25 15:25:50,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:25:50,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174513939] [2022-11-25 15:25:50,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:25:50,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:25:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:25:50,422 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 15:25:50,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:25:50,458 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 15:25:50,466 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 15:25:50,466 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-25 15:25:50,466 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-25 15:25:50,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 15:25:50,467 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-25 15:25:50,468 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 15:25:50,468 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-25 15:25:50,504 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 15:25:50,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 185 transitions, 400 flow [2022-11-25 15:25:50,590 INFO L130 PetriNetUnfolder]: 50/391 cut-off events. [2022-11-25 15:25:50,591 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-25 15:25:50,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 391 events. 50/391 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1347 event pairs, 1 based on Foata normal form. 0/333 useless extension candidates. Maximal degree in co-relation 265. Up to 16 conditions per place. [2022-11-25 15:25:50,595 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 185 transitions, 400 flow [2022-11-25 15:25:50,600 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 185 transitions, 400 flow [2022-11-25 15:25:50,601 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:25:50,601 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 166 places, 185 transitions, 400 flow [2022-11-25 15:25:50,601 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 166 places, 185 transitions, 400 flow [2022-11-25 15:25:50,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 185 transitions, 400 flow [2022-11-25 15:25:50,668 INFO L130 PetriNetUnfolder]: 50/391 cut-off events. [2022-11-25 15:25:50,669 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-25 15:25:50,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 391 events. 50/391 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1347 event pairs, 1 based on Foata normal form. 0/333 useless extension candidates. Maximal degree in co-relation 265. Up to 16 conditions per place. [2022-11-25 15:25:50,690 INFO L119 LiptonReduction]: Number of co-enabled transitions 17226 [2022-11-25 15:25:55,444 INFO L134 LiptonReduction]: Checked pairs total: 35234 [2022-11-25 15:25:55,444 INFO L136 LiptonReduction]: Total number of compositions: 156 [2022-11-25 15:25:55,447 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:25:55,448 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;@2010e14d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:25:55,449 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-25 15:25:55,451 INFO L130 PetriNetUnfolder]: 1/9 cut-off events. [2022-11-25 15:25:55,451 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:25:55,452 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:25:55,452 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 15:25:55,452 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:25:55,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:25:55,453 INFO L85 PathProgramCache]: Analyzing trace with hash 35145172, now seen corresponding path program 1 times [2022-11-25 15:25:55,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:25:55,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301431030] [2022-11-25 15:25:55,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:25:55,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:25:55,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:25:55,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:25:55,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:25:55,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301431030] [2022-11-25 15:25:55,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301431030] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:25:55,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:25:55,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:25:55,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275137916] [2022-11-25 15:25:55,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:25:55,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:25:55,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:25:55,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:25:55,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:25:55,506 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 341 [2022-11-25 15:25:55,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 74 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:25:55,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:25:55,507 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 341 [2022-11-25 15:25:55,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:25:59,600 INFO L130 PetriNetUnfolder]: 18748/29045 cut-off events. [2022-11-25 15:25:59,600 INFO L131 PetriNetUnfolder]: For 901/901 co-relation queries the response was YES. [2022-11-25 15:25:59,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56287 conditions, 29045 events. 18748/29045 cut-off events. For 901/901 co-relation queries the response was YES. Maximal size of possible extension queue 823. Compared 210066 event pairs, 12113 based on Foata normal form. 5272/31918 useless extension candidates. Maximal degree in co-relation 5135. Up to 26589 conditions per place. [2022-11-25 15:25:59,767 INFO L137 encePairwiseOnDemand]: 318/341 looper letters, 38 selfloop transitions, 2 changer transitions 10/63 dead transitions. [2022-11-25 15:25:59,768 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 63 transitions, 254 flow [2022-11-25 15:25:59,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:25:59,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:25:59,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 529 transitions. [2022-11-25 15:25:59,771 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5171065493646139 [2022-11-25 15:25:59,771 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 529 transitions. [2022-11-25 15:25:59,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 529 transitions. [2022-11-25 15:25:59,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:25:59,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 529 transitions. [2022-11-25 15:25:59,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:25:59,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:25:59,777 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:25:59,778 INFO L175 Difference]: Start difference. First operand has 58 places, 74 transitions, 178 flow. Second operand 3 states and 529 transitions. [2022-11-25 15:25:59,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 63 transitions, 254 flow [2022-11-25 15:25:59,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 63 transitions, 254 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 15:25:59,781 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 121 flow [2022-11-25 15:25:59,782 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2022-11-25 15:25:59,783 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2022-11-25 15:25:59,783 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 121 flow [2022-11-25 15:25:59,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:25:59,784 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:25:59,784 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:25:59,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 15:25:59,784 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:25:59,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:25:59,785 INFO L85 PathProgramCache]: Analyzing trace with hash 618614158, now seen corresponding path program 1 times [2022-11-25 15:25:59,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:25:59,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362128956] [2022-11-25 15:25:59,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:25:59,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:25:59,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:25:59,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:25:59,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:25:59,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362128956] [2022-11-25 15:25:59,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362128956] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:25:59,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706171664] [2022-11-25 15:25:59,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:25:59,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:25:59,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945c972e-b43d-48f4-934d-6bf0576a505c/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:25:59,871 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945c972e-b43d-48f4-934d-6bf0576a505c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:26:00,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945c972e-b43d-48f4-934d-6bf0576a505c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 15:26:00,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:26:00,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 15:26:00,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:26:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:26:00,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:26:00,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:26:00,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706171664] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:26:00,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:26:00,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 15:26:00,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245192825] [2022-11-25 15:26:00,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:26:00,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:26:00,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:26:00,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:26:00,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:26:00,173 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 341 [2022-11-25 15:26:00,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 121 flow. Second operand has 7 states, 7 states have (on average 152.28571428571428) internal successors, (1066), 7 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:26:00,175 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:26:00,175 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 341 [2022-11-25 15:26:00,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:26:01,096 INFO L130 PetriNetUnfolder]: 4342/7165 cut-off events. [2022-11-25 15:26:01,096 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2022-11-25 15:26:01,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16127 conditions, 7165 events. 4342/7165 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 47284 event pairs, 0 based on Foata normal form. 648/7812 useless extension candidates. Maximal degree in co-relation 2069. Up to 4192 conditions per place. [2022-11-25 15:26:01,152 INFO L137 encePairwiseOnDemand]: 338/341 looper letters, 72 selfloop transitions, 4 changer transitions 0/89 dead transitions. [2022-11-25 15:26:01,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 89 transitions, 361 flow [2022-11-25 15:26:01,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:26:01,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 15:26:01,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 979 transitions. [2022-11-25 15:26:01,157 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.478494623655914 [2022-11-25 15:26:01,157 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 979 transitions. [2022-11-25 15:26:01,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 979 transitions. [2022-11-25 15:26:01,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:26:01,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 979 transitions. [2022-11-25 15:26:01,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 163.16666666666666) internal successors, (979), 6 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:26:01,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 341.0) internal successors, (2387), 7 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:26:01,169 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 341.0) internal successors, (2387), 7 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:26:01,169 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 121 flow. Second operand 6 states and 979 transitions. [2022-11-25 15:26:01,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 89 transitions, 361 flow [2022-11-25 15:26:01,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 89 transitions, 353 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-11-25 15:26:01,183 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 117 flow [2022-11-25 15:26:01,183 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2022-11-25 15:26:01,185 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2022-11-25 15:26:01,186 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 117 flow [2022-11-25 15:26:01,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 152.28571428571428) internal successors, (1066), 7 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:26:01,187 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:26:01,188 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-25 15:26:01,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945c972e-b43d-48f4-934d-6bf0576a505c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-25 15:26:01,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945c972e-b43d-48f4-934d-6bf0576a505c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 15:26:01,395 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:26:01,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:26:01,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1102567103, now seen corresponding path program 1 times [2022-11-25 15:26:01,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:26:01,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421718544] [2022-11-25 15:26:01,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:26:01,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:26:01,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:26:01,426 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 15:26:01,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:26:01,457 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 15:26:01,460 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 15:26:01,460 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-25 15:26:01,461 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-25 15:26:01,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 15:26:01,461 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-25 15:26:01,463 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 15:26:01,463 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-25 15:26:01,497 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-25 15:26:01,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 196 places, 220 transitions, 484 flow [2022-11-25 15:26:01,612 INFO L130 PetriNetUnfolder]: 81/593 cut-off events. [2022-11-25 15:26:01,612 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-25 15:26:01,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 648 conditions, 593 events. 81/593 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2352 event pairs, 6 based on Foata normal form. 0/507 useless extension candidates. Maximal degree in co-relation 411. Up to 32 conditions per place. [2022-11-25 15:26:01,621 INFO L82 GeneralOperation]: Start removeDead. Operand has 196 places, 220 transitions, 484 flow [2022-11-25 15:26:01,628 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 196 places, 220 transitions, 484 flow [2022-11-25 15:26:01,628 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:26:01,628 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 196 places, 220 transitions, 484 flow [2022-11-25 15:26:01,628 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 196 places, 220 transitions, 484 flow [2022-11-25 15:26:01,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 196 places, 220 transitions, 484 flow [2022-11-25 15:26:01,768 INFO L130 PetriNetUnfolder]: 81/593 cut-off events. [2022-11-25 15:26:01,769 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-25 15:26:01,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 648 conditions, 593 events. 81/593 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2352 event pairs, 6 based on Foata normal form. 0/507 useless extension candidates. Maximal degree in co-relation 411. Up to 32 conditions per place. [2022-11-25 15:26:01,807 INFO L119 LiptonReduction]: Number of co-enabled transitions 27720 [2022-11-25 15:26:07,062 INFO L134 LiptonReduction]: Checked pairs total: 59612 [2022-11-25 15:26:07,062 INFO L136 LiptonReduction]: Total number of compositions: 183 [2022-11-25 15:26:07,064 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:26:07,065 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;@2010e14d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:26:07,065 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-25 15:26:07,068 INFO L130 PetriNetUnfolder]: 1/9 cut-off events. [2022-11-25 15:26:07,069 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:26:07,069 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:26:07,069 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 15:26:07,069 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:26:07,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:26:07,070 INFO L85 PathProgramCache]: Analyzing trace with hash 48629053, now seen corresponding path program 1 times [2022-11-25 15:26:07,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:26:07,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167300889] [2022-11-25 15:26:07,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:26:07,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:26:07,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:26:07,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:26:07,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:26:07,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167300889] [2022-11-25 15:26:07,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167300889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:26:07,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:26:07,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:26:07,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201257688] [2022-11-25 15:26:07,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:26:07,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:26:07,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:26:07,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:26:07,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:26:07,145 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 403 [2022-11-25 15:26:07,146 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 93 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:26:07,146 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:26:07,146 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 403 [2022-11-25 15:26:07,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:26:36,430 INFO L130 PetriNetUnfolder]: 209692/294597 cut-off events. [2022-11-25 15:26:36,431 INFO L131 PetriNetUnfolder]: For 12142/12142 co-relation queries the response was YES. [2022-11-25 15:26:36,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 576391 conditions, 294597 events. 209692/294597 cut-off events. For 12142/12142 co-relation queries the response was YES. Maximal size of possible extension queue 6902. Compared 2329490 event pairs, 154609 based on Foata normal form. 59490/333267 useless extension candidates. Maximal degree in co-relation 55518. Up to 274909 conditions per place. [2022-11-25 15:26:37,641 INFO L137 encePairwiseOnDemand]: 374/403 looper letters, 46 selfloop transitions, 2 changer transitions 11/76 dead transitions. [2022-11-25 15:26:37,641 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 76 transitions, 312 flow [2022-11-25 15:26:37,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:26:37,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:26:37,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 625 transitions. [2022-11-25 15:26:37,644 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5169561621174524 [2022-11-25 15:26:37,645 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 625 transitions. [2022-11-25 15:26:37,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 625 transitions. [2022-11-25 15:26:37,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:26:37,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 625 transitions. [2022-11-25 15:26:37,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.33333333333334) internal successors, (625), 3 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:26:37,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:26:37,652 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:26:37,652 INFO L175 Difference]: Start difference. First operand has 72 places, 93 transitions, 230 flow. Second operand 3 states and 625 transitions. [2022-11-25 15:26:37,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 76 transitions, 312 flow [2022-11-25 15:26:37,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 76 transitions, 312 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 15:26:37,657 INFO L231 Difference]: Finished difference. Result has 75 places, 57 transitions, 156 flow [2022-11-25 15:26:37,657 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=75, PETRI_TRANSITIONS=57} [2022-11-25 15:26:37,660 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2022-11-25 15:26:37,660 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 57 transitions, 156 flow [2022-11-25 15:26:37,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:26:37,661 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:26:37,661 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:26:37,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 15:26:37,661 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:26:37,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:26:37,662 INFO L85 PathProgramCache]: Analyzing trace with hash -485120313, now seen corresponding path program 1 times [2022-11-25 15:26:37,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:26:37,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948470829] [2022-11-25 15:26:37,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:26:37,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:26:37,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:26:37,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:26:37,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:26:37,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948470829] [2022-11-25 15:26:37,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948470829] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:26:37,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310376835] [2022-11-25 15:26:37,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:26:37,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:26:37,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945c972e-b43d-48f4-934d-6bf0576a505c/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:26:37,724 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945c972e-b43d-48f4-934d-6bf0576a505c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:26:37,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_945c972e-b43d-48f4-934d-6bf0576a505c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 15:26:37,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:26:37,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 15:26:37,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:26:37,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:26:37,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:26:37,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:26:37,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310376835] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:26:37,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:26:37,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 15:26:37,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028188685] [2022-11-25 15:26:37,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:26:37,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:26:37,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:26:37,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:26:37,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:26:37,880 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 403 [2022-11-25 15:26:37,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 57 transitions, 156 flow. Second operand has 7 states, 7 states have (on average 179.28571428571428) internal successors, (1255), 7 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:26:37,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:26:37,882 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 403 [2022-11-25 15:26:37,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand