/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_safe019_rmo.oepc_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 00:46:51,437 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 00:46:51,484 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 00:46:51,492 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 00:46:51,492 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 00:46:51,493 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 00:46:51,493 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 00:46:51,519 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 00:46:51,519 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 00:46:51,519 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 00:46:51,520 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 00:46:51,520 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 00:46:51,520 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 00:46:51,528 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 00:46:51,528 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 00:46:51,528 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 00:46:51,529 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 00:46:51,530 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 00:46:51,530 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 00:46:51,530 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 00:46:51,530 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 00:46:51,530 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 00:46:51,530 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 00:46:51,531 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 00:46:51,532 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 00:46:51,532 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 00:46:51,532 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 00:46:51,532 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 00:46:51,533 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 00:46:51,533 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 00:46:51,533 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:46:51,534 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 00:46:51,534 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 00:46:51,534 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 00:46:51,534 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 00:46:51,534 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 00:46:51,534 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 00:46:51,534 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 00:46:51,534 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 00:46:51,534 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 00:46:51,534 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 00:46:51,535 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 00:46:51,679 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 00:46:51,690 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 00:46:51,692 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 00:46:51,693 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 00:46:51,693 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 00:46:51,694 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe019_rmo.oepc_bound2.i [2023-08-04 00:46:52,589 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 00:46:52,764 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 00:46:52,764 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe019_rmo.oepc_bound2.i [2023-08-04 00:46:52,775 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fd6983c2/4293bc3cbbde49439a9688fe437475a8/FLAG2fab1fb43 [2023-08-04 00:46:52,783 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fd6983c2/4293bc3cbbde49439a9688fe437475a8 [2023-08-04 00:46:52,785 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 00:46:52,786 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 00:46:52,786 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 00:46:52,786 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 00:46:52,794 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 00:46:52,795 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:46:52" (1/1) ... [2023-08-04 00:46:52,795 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f49761f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:46:52, skipping insertion in model container [2023-08-04 00:46:52,796 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:46:52" (1/1) ... [2023-08-04 00:46:52,840 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 00:46:52,941 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_safe019_rmo.oepc_bound2.i[993,1006] [2023-08-04 00:46:53,036 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:46:53,046 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 00:46:53,059 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_safe019_rmo.oepc_bound2.i[993,1006] [2023-08-04 00:46:53,075 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 00:46:53,076 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 00:46:53,127 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:46:53,147 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:46:53,148 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:46:53,152 INFO L206 MainTranslator]: Completed translation [2023-08-04 00:46:53,152 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:46:53 WrapperNode [2023-08-04 00:46:53,152 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 00:46:53,153 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 00:46:53,153 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 00:46:53,153 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 00:46:53,157 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:46:53" (1/1) ... [2023-08-04 00:46:53,169 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:46:53" (1/1) ... [2023-08-04 00:46:53,186 INFO L138 Inliner]: procedures = 177, calls = 85, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 217 [2023-08-04 00:46:53,187 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 00:46:53,187 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 00:46:53,187 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 00:46:53,187 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 00:46:53,193 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:46:53" (1/1) ... [2023-08-04 00:46:53,193 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:46:53" (1/1) ... [2023-08-04 00:46:53,196 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:46:53" (1/1) ... [2023-08-04 00:46:53,196 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:46:53" (1/1) ... [2023-08-04 00:46:53,205 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:46:53" (1/1) ... [2023-08-04 00:46:53,207 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:46:53" (1/1) ... [2023-08-04 00:46:53,209 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:46:53" (1/1) ... [2023-08-04 00:46:53,210 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:46:53" (1/1) ... [2023-08-04 00:46:53,213 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 00:46:53,214 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 00:46:53,214 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 00:46:53,214 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 00:46:53,214 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:46:53" (1/1) ... [2023-08-04 00:46:53,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:46:53,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:46:53,235 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 00:46:53,238 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 00:46:53,255 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 00:46:53,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 00:46:53,256 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 00:46:53,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 00:46:53,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 00:46:53,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 00:46:53,256 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 00:46:53,256 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 00:46:53,256 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 00:46:53,256 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 00:46:53,256 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 00:46:53,256 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 00:46:53,257 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-04 00:46:53,257 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-04 00:46:53,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 00:46:53,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 00:46:53,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 00:46:53,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 00:46:53,258 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 00:46:53,360 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 00:46:53,361 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 00:46:53,664 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 00:46:53,826 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 00:46:53,827 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-04 00:46:53,829 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:46:53 BoogieIcfgContainer [2023-08-04 00:46:53,829 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 00:46:53,831 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 00:46:53,832 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 00:46:53,835 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 00:46:53,835 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 12:46:52" (1/3) ... [2023-08-04 00:46:53,835 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56135979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:46:53, skipping insertion in model container [2023-08-04 00:46:53,835 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:46:53" (2/3) ... [2023-08-04 00:46:53,835 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56135979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:46:53, skipping insertion in model container [2023-08-04 00:46:53,835 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:46:53" (3/3) ... [2023-08-04 00:46:53,836 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe019_rmo.oepc_bound2.i [2023-08-04 00:46:53,841 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 00:46:53,846 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 00:46:53,846 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 00:46:53,846 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 00:46:53,900 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:46:53,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 171 transitions, 362 flow [2023-08-04 00:46:54,111 INFO L124 PetriNetUnfolderBase]: 62/929 cut-off events. [2023-08-04 00:46:54,111 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:46:54,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 979 conditions, 929 events. 62/929 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5541 event pairs, 0 based on Foata normal form. 0/821 useless extension candidates. Maximal degree in co-relation 566. Up to 32 conditions per place. [2023-08-04 00:46:54,120 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 171 transitions, 362 flow [2023-08-04 00:46:54,125 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 146 places, 140 transitions, 300 flow [2023-08-04 00:46:54,127 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:46:54,137 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 146 places, 140 transitions, 300 flow [2023-08-04 00:46:54,139 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 146 places, 140 transitions, 300 flow [2023-08-04 00:46:54,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 140 transitions, 300 flow [2023-08-04 00:46:54,176 INFO L124 PetriNetUnfolderBase]: 14/433 cut-off events. [2023-08-04 00:46:54,176 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:46:54,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 483 conditions, 433 events. 14/433 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1829 event pairs, 0 based on Foata normal form. 0/405 useless extension candidates. Maximal degree in co-relation 318. Up to 16 conditions per place. [2023-08-04 00:46:54,182 INFO L119 LiptonReduction]: Number of co-enabled transitions 1960 [2023-08-04 00:46:58,517 INFO L134 LiptonReduction]: Checked pairs total: 4950 [2023-08-04 00:46:58,517 INFO L136 LiptonReduction]: Total number of compositions: 115 [2023-08-04 00:46:58,525 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:46:58,529 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;@378de05c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:46:58,529 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 00:46:58,533 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:46:58,534 INFO L124 PetriNetUnfolderBase]: 0/28 cut-off events. [2023-08-04 00:46:58,534 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:46:58,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:46:58,534 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 00:46:58,535 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 00:46:58,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:46:58,538 INFO L85 PathProgramCache]: Analyzing trace with hash 172399985, now seen corresponding path program 1 times [2023-08-04 00:46:58,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:46:58,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017493562] [2023-08-04 00:46:58,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:46:58,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:46:58,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:46:58,647 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 00:46:58,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:46:58,680 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 00:46:58,681 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 00:46:58,682 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 00:46:58,683 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 00:46:58,683 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 00:46:58,683 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 00:46:58,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 00:46:58,684 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 00:46:58,686 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (1/2) [2023-08-04 00:46:58,686 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 00:46:58,686 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 00:46:58,720 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:46:58,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 199 transitions, 446 flow [2023-08-04 00:46:59,172 INFO L124 PetriNetUnfolderBase]: 282/4219 cut-off events. [2023-08-04 00:46:59,172 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-04 00:46:59,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4508 conditions, 4219 events. 282/4219 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 40286 event pairs, 0 based on Foata normal form. 0/3736 useless extension candidates. Maximal degree in co-relation 3068. Up to 162 conditions per place. [2023-08-04 00:46:59,195 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 199 transitions, 446 flow [2023-08-04 00:46:59,200 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 182 places, 168 transitions, 384 flow [2023-08-04 00:46:59,200 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:46:59,200 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 182 places, 168 transitions, 384 flow [2023-08-04 00:46:59,200 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 182 places, 168 transitions, 384 flow [2023-08-04 00:46:59,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 168 transitions, 384 flow [2023-08-04 00:46:59,345 INFO L124 PetriNetUnfolderBase]: 39/1708 cut-off events. [2023-08-04 00:46:59,345 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-04 00:46:59,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1997 conditions, 1708 events. 39/1708 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 13082 event pairs, 0 based on Foata normal form. 0/1630 useless extension candidates. Maximal degree in co-relation 1394. Up to 81 conditions per place. [2023-08-04 00:46:59,373 INFO L119 LiptonReduction]: Number of co-enabled transitions 5260 [2023-08-04 00:47:03,859 INFO L134 LiptonReduction]: Checked pairs total: 15166 [2023-08-04 00:47:03,860 INFO L136 LiptonReduction]: Total number of compositions: 123 [2023-08-04 00:47:03,861 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:47:03,862 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;@378de05c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:47:03,862 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 00:47:03,868 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:47:03,868 INFO L124 PetriNetUnfolderBase]: 0/88 cut-off events. [2023-08-04 00:47:03,868 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-04 00:47:03,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:47:03,868 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:47:03,869 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 00:47:03,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:47:03,869 INFO L85 PathProgramCache]: Analyzing trace with hash -287519632, now seen corresponding path program 1 times [2023-08-04 00:47:03,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:47:03,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718137796] [2023-08-04 00:47:03,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:47:03,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:47:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:47:03,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:47:03,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:47:03,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718137796] [2023-08-04 00:47:03,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718137796] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:47:03,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:47:03,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:47:03,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910286526] [2023-08-04 00:47:03,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:47:03,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:47:03,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:47:04,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:47:04,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:47:04,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 322 [2023-08-04 00:47:04,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 51 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 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 00:47:04,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:47:04,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 322 [2023-08-04 00:47:04,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:48:15,463 INFO L124 PetriNetUnfolderBase]: 634776/801706 cut-off events. [2023-08-04 00:48:15,464 INFO L125 PetriNetUnfolderBase]: For 45504/45504 co-relation queries the response was YES. [2023-08-04 00:48:17,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1633275 conditions, 801706 events. 634776/801706 cut-off events. For 45504/45504 co-relation queries the response was YES. Maximal size of possible extension queue 17929. Compared 5269647 event pairs, 538458 based on Foata normal form. 0/788869 useless extension candidates. Maximal degree in co-relation 480206. Up to 779254 conditions per place. [2023-08-04 00:48:20,558 INFO L140 encePairwiseOnDemand]: 319/322 looper letters, 41 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-04 00:48:20,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 55 transitions, 244 flow [2023-08-04 00:48:20,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:48:20,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:48:20,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 560 transitions. [2023-08-04 00:48:20,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5797101449275363 [2023-08-04 00:48:20,583 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 560 transitions. [2023-08-04 00:48:20,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 560 transitions. [2023-08-04 00:48:20,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:48:20,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 560 transitions. [2023-08-04 00:48:20,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 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 00:48:20,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 322.0) internal successors, (1288), 4 states have internal predecessors, (1288), 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 00:48:20,592 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 322.0) internal successors, (1288), 4 states have internal predecessors, (1288), 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 00:48:20,593 INFO L175 Difference]: Start difference. First operand has 68 places, 51 transitions, 150 flow. Second operand 3 states and 560 transitions. [2023-08-04 00:48:20,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 55 transitions, 244 flow [2023-08-04 00:48:20,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 55 transitions, 236 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-04 00:48:20,637 INFO L231 Difference]: Finished difference. Result has 71 places, 52 transitions, 154 flow [2023-08-04 00:48:20,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=71, PETRI_TRANSITIONS=52} [2023-08-04 00:48:20,640 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-08-04 00:48:20,640 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 52 transitions, 154 flow [2023-08-04 00:48:20,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 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 00:48:20,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:48:20,641 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 00:48:20,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 00:48:20,641 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 00:48:20,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:48:20,641 INFO L85 PathProgramCache]: Analyzing trace with hash 120331161, now seen corresponding path program 1 times [2023-08-04 00:48:20,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:48:20,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094525770] [2023-08-04 00:48:20,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:48:20,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:48:20,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:48:20,726 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 00:48:20,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:48:20,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094525770] [2023-08-04 00:48:20,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094525770] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:48:20,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548007023] [2023-08-04 00:48:20,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:48:20,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:48:20,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:48:20,729 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 00:48:20,761 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 00:48:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:48:20,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:48:20,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:48:20,878 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 00:48:20,878 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:48:20,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548007023] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:48:20,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:48:20,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 00:48:20,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300342337] [2023-08-04 00:48:20,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:48:20,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:48:20,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:48:20,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:48:20,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:48:20,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 322 [2023-08-04 00:48:20,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 52 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 172.6) internal successors, (863), 5 states have internal predecessors, (863), 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 00:48:20,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:48:20,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 322 [2023-08-04 00:48:20,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:49:31,235 INFO L124 PetriNetUnfolderBase]: 634764/801649 cut-off events. [2023-08-04 00:49:31,235 INFO L125 PetriNetUnfolderBase]: For 43419/43419 co-relation queries the response was YES. [2023-08-04 00:49:34,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1631169 conditions, 801649 events. 634764/801649 cut-off events. For 43419/43419 co-relation queries the response was YES. Maximal size of possible extension queue 17799. Compared 5267120 event pairs, 466224 based on Foata normal form. 9/788866 useless extension candidates. Maximal degree in co-relation 575815. Up to 779207 conditions per place. [2023-08-04 00:49:36,645 INFO L140 encePairwiseOnDemand]: 318/322 looper letters, 44 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2023-08-04 00:49:36,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 59 transitions, 264 flow [2023-08-04 00:49:36,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:49:36,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:49:36,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 904 transitions. [2023-08-04 00:49:36,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5614906832298137 [2023-08-04 00:49:36,649 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 904 transitions. [2023-08-04 00:49:36,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 904 transitions. [2023-08-04 00:49:36,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:49:36,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 904 transitions. [2023-08-04 00:49:36,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 180.8) internal successors, (904), 5 states have internal predecessors, (904), 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 00:49:36,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 322.0) internal successors, (1932), 6 states have internal predecessors, (1932), 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 00:49:36,654 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 322.0) internal successors, (1932), 6 states have internal predecessors, (1932), 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 00:49:36,654 INFO L175 Difference]: Start difference. First operand has 71 places, 52 transitions, 154 flow. Second operand 5 states and 904 transitions. [2023-08-04 00:49:36,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 59 transitions, 264 flow [2023-08-04 00:49:36,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 59 transitions, 261 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 00:49:36,680 INFO L231 Difference]: Finished difference. Result has 74 places, 52 transitions, 168 flow [2023-08-04 00:49:36,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=168, PETRI_PLACES=74, PETRI_TRANSITIONS=52} [2023-08-04 00:49:36,680 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 6 predicate places. [2023-08-04 00:49:36,681 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 52 transitions, 168 flow [2023-08-04 00:49:36,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 172.6) internal successors, (863), 5 states have internal predecessors, (863), 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 00:49:36,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:49:36,681 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:49:36,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 00:49:36,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:49:36,882 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 00:49:36,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:49:36,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1800115022, now seen corresponding path program 1 times [2023-08-04 00:49:36,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:49:36,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164017081] [2023-08-04 00:49:36,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:49:36,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:49:36,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:49:36,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:49:36,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:49:36,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164017081] [2023-08-04 00:49:36,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164017081] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:49:36,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135931338] [2023-08-04 00:49:36,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:49:36,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:49:36,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:49:36,948 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:49:36,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 00:49:37,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:49:37,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:49:37,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:49:37,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:49:37,070 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:49:37,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135931338] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:49:37,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:49:37,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:49:37,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389330563] [2023-08-04 00:49:37,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:49:37,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:49:37,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:49:37,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:49:37,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:49:37,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 322 [2023-08-04 00:49:37,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 52 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 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 00:49:37,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:49:37,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 322 [2023-08-04 00:49:37,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand