/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe016_rmo.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 00:37:18,474 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 00:37:18,555 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 00:37:18,563 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 00:37:18,563 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 00:37:18,564 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 00:37:18,564 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 00:37:18,594 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 00:37:18,594 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 00:37:18,594 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 00:37:18,595 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 00:37:18,595 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 00:37:18,596 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 00:37:18,596 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 00:37:18,596 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 00:37:18,599 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 00:37:18,600 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 00:37:18,604 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 00:37:18,604 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 00:37:18,604 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 00:37:18,606 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 00:37:18,606 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 00:37:18,606 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 00:37:18,606 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 00:37:18,607 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 00:37:18,608 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 00:37:18,608 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 00:37:18,608 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 00:37:18,609 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 00:37:18,609 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 00:37:18,610 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:37:18,610 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 00:37:18,610 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 00:37:18,610 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 00:37:18,610 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 00:37:18,610 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 00:37:18,611 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 00:37:18,611 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 00:37:18,611 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 00:37:18,611 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 00:37:18,611 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 00:37:18,611 INFO L153 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 00:37:18,817 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 00:37:18,840 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 00:37:18,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 00:37:18,843 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 00:37:18,843 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 00:37:18,844 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe016_rmo.opt_bound2.i [2023-08-04 00:37:20,063 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 00:37:20,296 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 00:37:20,297 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe016_rmo.opt_bound2.i [2023-08-04 00:37:20,322 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cba1b8bf/03312fec6d51499294271aa99706b664/FLAGe8b494f51 [2023-08-04 00:37:20,334 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cba1b8bf/03312fec6d51499294271aa99706b664 [2023-08-04 00:37:20,336 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 00:37:20,338 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 00:37:20,339 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 00:37:20,339 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 00:37:20,345 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 00:37:20,345 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:37:20" (1/1) ... [2023-08-04 00:37:20,346 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10129020 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:37:20, skipping insertion in model container [2023-08-04 00:37:20,346 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:37:20" (1/1) ... [2023-08-04 00:37:20,395 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 00:37:20,541 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe016_rmo.opt_bound2.i[949,962] [2023-08-04 00:37:20,714 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:37:20,723 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 00:37:20,733 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe016_rmo.opt_bound2.i[949,962] [2023-08-04 00:37:20,740 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 00:37:20,742 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 00:37:20,808 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:37:20,834 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:37:20,834 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:37:20,839 INFO L206 MainTranslator]: Completed translation [2023-08-04 00:37:20,840 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:37:20 WrapperNode [2023-08-04 00:37:20,840 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 00:37:20,841 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 00:37:20,841 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 00:37:20,841 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 00:37:20,846 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:37:20" (1/1) ... [2023-08-04 00:37:20,862 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:37:20" (1/1) ... [2023-08-04 00:37:20,890 INFO L138 Inliner]: procedures = 177, calls = 89, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 216 [2023-08-04 00:37:20,891 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 00:37:20,893 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 00:37:20,893 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 00:37:20,893 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 00:37:20,903 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:37:20" (1/1) ... [2023-08-04 00:37:20,903 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:37:20" (1/1) ... [2023-08-04 00:37:20,909 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:37:20" (1/1) ... [2023-08-04 00:37:20,909 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:37:20" (1/1) ... [2023-08-04 00:37:20,920 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:37:20" (1/1) ... [2023-08-04 00:37:20,924 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:37:20" (1/1) ... [2023-08-04 00:37:20,927 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:37:20" (1/1) ... [2023-08-04 00:37:20,929 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:37:20" (1/1) ... [2023-08-04 00:37:20,933 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 00:37:20,934 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 00:37:20,934 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 00:37:20,934 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 00:37:20,935 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:37:20" (1/1) ... [2023-08-04 00:37:20,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:37:20,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:37:20,990 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 00:37:21,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 00:37:21,027 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 00:37:21,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 00:37:21,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 00:37:21,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 00:37:21,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 00:37:21,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 00:37:21,030 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 00:37:21,030 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 00:37:21,030 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 00:37:21,030 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 00:37:21,031 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 00:37:21,031 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 00:37:21,031 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-04 00:37:21,031 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-04 00:37:21,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 00:37:21,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 00:37:21,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 00:37:21,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 00:37:21,033 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 00:37:21,232 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 00:37:21,234 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 00:37:21,752 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 00:37:21,971 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 00:37:21,972 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-04 00:37:21,974 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:37:21 BoogieIcfgContainer [2023-08-04 00:37:21,974 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 00:37:21,976 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 00:37:21,976 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 00:37:21,979 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 00:37:21,979 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 12:37:20" (1/3) ... [2023-08-04 00:37:21,980 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f4b0f86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:37:21, skipping insertion in model container [2023-08-04 00:37:21,980 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:37:20" (2/3) ... [2023-08-04 00:37:21,980 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f4b0f86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:37:21, skipping insertion in model container [2023-08-04 00:37:21,981 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:37:21" (3/3) ... [2023-08-04 00:37:21,982 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe016_rmo.opt_bound2.i [2023-08-04 00:37:21,990 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 00:37:21,999 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 00:37:21,999 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 00:37:21,999 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 00:37:22,080 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:37:22,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 172 transitions, 364 flow [2023-08-04 00:37:22,393 INFO L124 PetriNetUnfolderBase]: 62/931 cut-off events. [2023-08-04 00:37:22,394 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:37:22,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 981 conditions, 931 events. 62/931 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5567 event pairs, 0 based on Foata normal form. 0/823 useless extension candidates. Maximal degree in co-relation 568. Up to 32 conditions per place. [2023-08-04 00:37:22,403 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 172 transitions, 364 flow [2023-08-04 00:37:22,431 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 147 places, 141 transitions, 302 flow [2023-08-04 00:37:22,434 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:37:22,446 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 147 places, 141 transitions, 302 flow [2023-08-04 00:37:22,450 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 147 places, 141 transitions, 302 flow [2023-08-04 00:37:22,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 141 transitions, 302 flow [2023-08-04 00:37:22,514 INFO L124 PetriNetUnfolderBase]: 14/435 cut-off events. [2023-08-04 00:37:22,514 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:37:22,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 485 conditions, 435 events. 14/435 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1860 event pairs, 0 based on Foata normal form. 0/407 useless extension candidates. Maximal degree in co-relation 320. Up to 16 conditions per place. [2023-08-04 00:37:22,523 INFO L119 LiptonReduction]: Number of co-enabled transitions 2226 [2023-08-04 00:37:27,625 INFO L134 LiptonReduction]: Checked pairs total: 5949 [2023-08-04 00:37:27,625 INFO L136 LiptonReduction]: Total number of compositions: 114 [2023-08-04 00:37:27,637 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:37:27,643 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;@30ad0baa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:37:27,643 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 00:37:27,649 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:37:27,649 INFO L124 PetriNetUnfolderBase]: 0/28 cut-off events. [2023-08-04 00:37:27,649 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:37:27,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:37:27,650 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 00:37:27,650 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 00:37:27,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:37:27,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1666189041, now seen corresponding path program 1 times [2023-08-04 00:37:27,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:37:27,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366069067] [2023-08-04 00:37:27,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:37:27,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:37:27,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:37:27,787 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 00:37:27,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:37:27,872 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 00:37:27,874 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 00:37:27,875 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 00:37:27,877 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 00:37:27,877 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 00:37:27,878 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 00:37:27,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 00:37:27,879 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 00:37:27,885 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (1/2) [2023-08-04 00:37:27,887 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 00:37:27,887 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 00:37:27,955 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:37:27,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 202 transitions, 452 flow [2023-08-04 00:37:28,642 INFO L124 PetriNetUnfolderBase]: 282/4226 cut-off events. [2023-08-04 00:37:28,642 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-04 00:37:28,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4515 conditions, 4226 events. 282/4226 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 40170 event pairs, 0 based on Foata normal form. 0/3743 useless extension candidates. Maximal degree in co-relation 3075. Up to 162 conditions per place. [2023-08-04 00:37:28,676 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 202 transitions, 452 flow [2023-08-04 00:37:28,683 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 185 places, 171 transitions, 390 flow [2023-08-04 00:37:28,684 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:37:28,684 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 185 places, 171 transitions, 390 flow [2023-08-04 00:37:28,684 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 185 places, 171 transitions, 390 flow [2023-08-04 00:37:28,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 185 places, 171 transitions, 390 flow [2023-08-04 00:37:28,920 INFO L124 PetriNetUnfolderBase]: 39/1715 cut-off events. [2023-08-04 00:37:28,921 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-04 00:37:28,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2004 conditions, 1715 events. 39/1715 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 13140 event pairs, 0 based on Foata normal form. 0/1637 useless extension candidates. Maximal degree in co-relation 1401. Up to 81 conditions per place. [2023-08-04 00:37:28,955 INFO L119 LiptonReduction]: Number of co-enabled transitions 6016 [2023-08-04 00:37:34,275 INFO L134 LiptonReduction]: Checked pairs total: 22388 [2023-08-04 00:37:34,275 INFO L136 LiptonReduction]: Total number of compositions: 122 [2023-08-04 00:37:34,278 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:37:34,284 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;@30ad0baa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:37:34,284 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 00:37:34,298 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:37:34,298 INFO L124 PetriNetUnfolderBase]: 0/86 cut-off events. [2023-08-04 00:37:34,298 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 00:37:34,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:37:34,299 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 00:37:34,299 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 00:37:34,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:37:34,300 INFO L85 PathProgramCache]: Analyzing trace with hash -798437937, now seen corresponding path program 1 times [2023-08-04 00:37:34,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:37:34,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989499548] [2023-08-04 00:37:34,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:37:34,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:37:34,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:37:34,514 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:37:34,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:37:34,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989499548] [2023-08-04 00:37:34,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989499548] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:37:34,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396803827] [2023-08-04 00:37:34,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:37:34,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:37:34,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:37:34,519 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:37:34,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 00:37:34,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:37:34,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:37:34,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:37:34,707 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:37:34,708 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:37:34,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396803827] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:37:34,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:37:34,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 00:37:34,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294859156] [2023-08-04 00:37:34,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:37:34,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:37:34,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:37:34,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:37:34,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:37:34,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 324 [2023-08-04 00:37:34,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 55 transitions, 158 flow. Second operand has 5 states, 5 states have (on average 171.6) internal successors, (858), 5 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:37:34,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:37:34,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 324 [2023-08-04 00:37:34,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand