/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 PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-atomic_szymanski_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 04:42:15,001 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 04:42:15,066 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 04:42:15,071 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 04:42:15,072 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 04:42:15,073 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 04:42:15,073 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 04:42:15,110 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 04:42:15,110 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 04:42:15,114 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 04:42:15,115 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 04:42:15,115 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 04:42:15,116 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 04:42:15,117 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 04:42:15,117 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 04:42:15,118 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 04:42:15,118 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 04:42:15,118 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 04:42:15,118 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 04:42:15,118 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 04:42:15,119 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 04:42:15,119 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 04:42:15,119 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 04:42:15,119 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 04:42:15,120 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 04:42:15,120 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 04:42:15,120 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 04:42:15,121 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 04:42:15,121 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 04:42:15,121 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 04:42:15,122 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 04:42:15,122 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 04:42:15,122 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 04:42:15,122 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 04:42:15,123 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 04:42:15,123 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 04:42:15,123 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 04:42:15,123 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 04:42:15,123 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 04:42:15,123 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 04:42:15,123 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 04:42:15,124 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 04:42:15,361 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 04:42:15,388 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 04:42:15,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 04:42:15,391 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 04:42:15,392 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 04:42:15,393 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-atomic_szymanski_bound2.i [2023-08-04 04:42:16,494 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 04:42:16,732 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 04:42:16,739 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-atomic_szymanski_bound2.i [2023-08-04 04:42:16,763 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa9f1b4e5/b060a0f5599a4db09799d5f6a9eb6ce5/FLAG3b67e2d99 [2023-08-04 04:42:16,779 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa9f1b4e5/b060a0f5599a4db09799d5f6a9eb6ce5 [2023-08-04 04:42:16,784 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 04:42:16,787 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 04:42:16,790 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 04:42:16,790 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 04:42:16,793 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 04:42:16,794 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 04:42:16" (1/1) ... [2023-08-04 04:42:16,795 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7932a33b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:42:16, skipping insertion in model container [2023-08-04 04:42:16,795 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 04:42:16" (1/1) ... [2023-08-04 04:42:16,847 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 04:42:17,000 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-04 04:42:17,148 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-atomic_szymanski_bound2.i[31505,31518] [2023-08-04 04:42:17,154 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-atomic_szymanski_bound2.i[32915,32928] [2023-08-04 04:42:17,172 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 04:42:17,182 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 04:42:17,206 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-04 04:42:17,217 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [265] [2023-08-04 04:42:17,219 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [265] [2023-08-04 04:42:17,228 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-atomic_szymanski_bound2.i[31505,31518] [2023-08-04 04:42:17,242 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-atomic_szymanski_bound2.i[32915,32928] [2023-08-04 04:42:17,252 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 04:42:17,279 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 04:42:17,280 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 04:42:17,280 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 04:42:17,285 INFO L206 MainTranslator]: Completed translation [2023-08-04 04:42:17,286 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:42:17 WrapperNode [2023-08-04 04:42:17,286 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 04:42:17,286 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 04:42:17,287 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 04:42:17,287 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 04:42:17,292 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:42:17" (1/1) ... [2023-08-04 04:42:17,305 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:42:17" (1/1) ... [2023-08-04 04:42:17,334 INFO L138 Inliner]: procedures = 171, calls = 75, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 74 [2023-08-04 04:42:17,334 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 04:42:17,335 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 04:42:17,335 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 04:42:17,335 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 04:42:17,342 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:42:17" (1/1) ... [2023-08-04 04:42:17,342 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:42:17" (1/1) ... [2023-08-04 04:42:17,356 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:42:17" (1/1) ... [2023-08-04 04:42:17,357 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:42:17" (1/1) ... [2023-08-04 04:42:17,364 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:42:17" (1/1) ... [2023-08-04 04:42:17,368 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:42:17" (1/1) ... [2023-08-04 04:42:17,375 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:42:17" (1/1) ... [2023-08-04 04:42:17,376 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:42:17" (1/1) ... [2023-08-04 04:42:17,380 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 04:42:17,380 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 04:42:17,381 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 04:42:17,381 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 04:42:17,381 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:42:17" (1/1) ... [2023-08-04 04:42:17,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 04:42:17,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:42:17,418 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 04:42:17,428 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 04:42:17,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 04:42:17,456 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-08-04 04:42:17,457 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-08-04 04:42:17,457 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-04 04:42:17,457 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-04 04:42:17,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 04:42:17,457 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 04:42:17,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 04:42:17,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 04:42:17,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 04:42:17,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 04:42:17,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 04:42:17,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 04:42:17,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 04:42:17,460 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 04:42:17,609 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 04:42:17,611 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 04:42:17,868 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 04:42:17,873 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 04:42:17,874 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-08-04 04:42:17,876 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 04:42:17 BoogieIcfgContainer [2023-08-04 04:42:17,876 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 04:42:17,878 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 04:42:17,878 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 04:42:17,881 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 04:42:17,882 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 04:42:16" (1/3) ... [2023-08-04 04:42:17,882 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629a1326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 04:42:17, skipping insertion in model container [2023-08-04 04:42:17,882 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:42:17" (2/3) ... [2023-08-04 04:42:17,883 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629a1326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 04:42:17, skipping insertion in model container [2023-08-04 04:42:17,883 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 04:42:17" (3/3) ... [2023-08-04 04:42:17,884 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-atomic_szymanski_bound2.i [2023-08-04 04:42:17,891 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 04:42:17,925 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 04:42:17,926 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-04 04:42:17,926 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 04:42:18,003 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 04:42:18,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 120 places, 143 transitions, 308 flow [2023-08-04 04:42:18,110 INFO L124 PetriNetUnfolderBase]: 52/282 cut-off events. [2023-08-04 04:42:18,110 INFO L125 PetriNetUnfolderBase]: For 8/14 co-relation queries the response was YES. [2023-08-04 04:42:18,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 282 events. 52/282 cut-off events. For 8/14 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1051 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 152. Up to 8 conditions per place. [2023-08-04 04:42:18,126 INFO L82 GeneralOperation]: Start removeDead. Operand has 120 places, 143 transitions, 308 flow [2023-08-04 04:42:18,131 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 120 places, 143 transitions, 308 flow [2023-08-04 04:42:18,134 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:42:18,142 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 120 places, 143 transitions, 308 flow [2023-08-04 04:42:18,145 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 120 places, 143 transitions, 308 flow [2023-08-04 04:42:18,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 120 places, 143 transitions, 308 flow [2023-08-04 04:42:18,203 INFO L124 PetriNetUnfolderBase]: 52/282 cut-off events. [2023-08-04 04:42:18,204 INFO L125 PetriNetUnfolderBase]: For 8/14 co-relation queries the response was YES. [2023-08-04 04:42:18,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 282 events. 52/282 cut-off events. For 8/14 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1051 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 152. Up to 8 conditions per place. [2023-08-04 04:42:18,213 INFO L119 LiptonReduction]: Number of co-enabled transitions 9216 [2023-08-04 04:42:20,122 INFO L134 LiptonReduction]: Checked pairs total: 18870 [2023-08-04 04:42:20,123 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-08-04 04:42:20,135 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 04:42:20,142 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;@755f9785, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:42:20,143 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 04:42:20,151 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:42:20,151 INFO L124 PetriNetUnfolderBase]: 10/70 cut-off events. [2023-08-04 04:42:20,151 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:42:20,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:42:20,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:42:20,152 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:42:20,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:42:20,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1483150745, now seen corresponding path program 1 times [2023-08-04 04:42:20,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:42:20,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673175486] [2023-08-04 04:42:20,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:42:20,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:42:20,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:42:20,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:42:20,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:42:20,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673175486] [2023-08-04 04:42:20,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673175486] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:42:20,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:42:20,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:42:20,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737667171] [2023-08-04 04:42:20,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:42:20,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:42:20,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:42:20,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:42:20,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:42:20,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 244 [2023-08-04 04:42:20,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 62 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 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 04:42:20,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:42:20,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 244 [2023-08-04 04:42:20,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:42:20,925 INFO L124 PetriNetUnfolderBase]: 3846/6090 cut-off events. [2023-08-04 04:42:20,926 INFO L125 PetriNetUnfolderBase]: For 125/125 co-relation queries the response was YES. [2023-08-04 04:42:20,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11543 conditions, 6090 events. 3846/6090 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 34654 event pairs, 1156 based on Foata normal form. 0/3662 useless extension candidates. Maximal degree in co-relation 10683. Up to 3341 conditions per place. [2023-08-04 04:42:20,969 INFO L140 encePairwiseOnDemand]: 238/244 looper letters, 66 selfloop transitions, 3 changer transitions 5/89 dead transitions. [2023-08-04 04:42:20,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 89 transitions, 358 flow [2023-08-04 04:42:20,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:42:20,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:42:20,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 430 transitions. [2023-08-04 04:42:20,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.587431693989071 [2023-08-04 04:42:20,988 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 430 transitions. [2023-08-04 04:42:20,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 430 transitions. [2023-08-04 04:42:20,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:42:20,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 430 transitions. [2023-08-04 04:42:20,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 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 04:42:21,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 244.0) internal successors, (976), 4 states have internal predecessors, (976), 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 04:42:21,004 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 244.0) internal successors, (976), 4 states have internal predecessors, (976), 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 04:42:21,006 INFO L175 Difference]: Start difference. First operand has 52 places, 62 transitions, 146 flow. Second operand 3 states and 430 transitions. [2023-08-04 04:42:21,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 89 transitions, 358 flow [2023-08-04 04:42:21,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 89 transitions, 358 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 04:42:21,016 INFO L231 Difference]: Finished difference. Result has 56 places, 61 transitions, 160 flow [2023-08-04 04:42:21,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=244, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=56, PETRI_TRANSITIONS=61} [2023-08-04 04:42:21,022 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 4 predicate places. [2023-08-04 04:42:21,022 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 61 transitions, 160 flow [2023-08-04 04:42:21,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 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 04:42:21,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:42:21,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:42:21,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 04:42:21,023 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr2Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:42:21,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:42:21,024 INFO L85 PathProgramCache]: Analyzing trace with hash -383756943, now seen corresponding path program 1 times [2023-08-04 04:42:21,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:42:21,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953859844] [2023-08-04 04:42:21,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:42:21,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:42:21,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:42:21,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:42:21,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:42:21,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953859844] [2023-08-04 04:42:21,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953859844] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:42:21,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:42:21,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:42:21,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550882609] [2023-08-04 04:42:21,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:42:21,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:42:21,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:42:21,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:42:21,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:42:21,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 244 [2023-08-04 04:42:21,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 61 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 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 04:42:21,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:42:21,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 244 [2023-08-04 04:42:21,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:42:21,545 INFO L124 PetriNetUnfolderBase]: 3541/5740 cut-off events. [2023-08-04 04:42:21,545 INFO L125 PetriNetUnfolderBase]: For 798/798 co-relation queries the response was YES. [2023-08-04 04:42:21,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11470 conditions, 5740 events. 3541/5740 cut-off events. For 798/798 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 35121 event pairs, 1422 based on Foata normal form. 0/3917 useless extension candidates. Maximal degree in co-relation 10698. Up to 4945 conditions per place. [2023-08-04 04:42:21,584 INFO L140 encePairwiseOnDemand]: 241/244 looper letters, 56 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-08-04 04:42:21,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 74 transitions, 304 flow [2023-08-04 04:42:21,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:42:21,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:42:21,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 415 transitions. [2023-08-04 04:42:21,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5669398907103825 [2023-08-04 04:42:21,586 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 415 transitions. [2023-08-04 04:42:21,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 415 transitions. [2023-08-04 04:42:21,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:42:21,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 415 transitions. [2023-08-04 04:42:21,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 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 04:42:21,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 244.0) internal successors, (976), 4 states have internal predecessors, (976), 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 04:42:21,590 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 244.0) internal successors, (976), 4 states have internal predecessors, (976), 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 04:42:21,590 INFO L175 Difference]: Start difference. First operand has 56 places, 61 transitions, 160 flow. Second operand 3 states and 415 transitions. [2023-08-04 04:42:21,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 74 transitions, 304 flow [2023-08-04 04:42:21,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 74 transitions, 295 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 04:42:21,599 INFO L231 Difference]: Finished difference. Result has 55 places, 61 transitions, 159 flow [2023-08-04 04:42:21,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=244, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=159, PETRI_PLACES=55, PETRI_TRANSITIONS=61} [2023-08-04 04:42:21,600 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2023-08-04 04:42:21,600 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 61 transitions, 159 flow [2023-08-04 04:42:21,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 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 04:42:21,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:42:21,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:42:21,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 04:42:21,601 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr2Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:42:21,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:42:21,602 INFO L85 PathProgramCache]: Analyzing trace with hash -881396036, now seen corresponding path program 1 times [2023-08-04 04:42:21,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:42:21,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432430070] [2023-08-04 04:42:21,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:42:21,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:42:21,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:42:21,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:42:21,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:42:21,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432430070] [2023-08-04 04:42:21,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432430070] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:42:21,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994535213] [2023-08-04 04:42:21,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:42:21,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:42:21,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:42:21,679 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 04:42:21,701 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 04:42:21,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:42:21,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 04:42:21,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:42:21,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:42:21,798 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 04:42:21,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994535213] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:42:21,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 04:42:21,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 04:42:21,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177418862] [2023-08-04 04:42:21,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:42:21,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:42:21,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:42:21,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:42:21,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:42:21,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 244 [2023-08-04 04:42:21,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 61 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 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 04:42:21,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:42:21,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 244 [2023-08-04 04:42:21,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:42:22,300 INFO L124 PetriNetUnfolderBase]: 3352/5435 cut-off events. [2023-08-04 04:42:22,300 INFO L125 PetriNetUnfolderBase]: For 343/343 co-relation queries the response was YES. [2023-08-04 04:42:22,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10725 conditions, 5435 events. 3352/5435 cut-off events. For 343/343 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 32343 event pairs, 1170 based on Foata normal form. 150/3807 useless extension candidates. Maximal degree in co-relation 8575. Up to 3218 conditions per place. [2023-08-04 04:42:22,325 INFO L140 encePairwiseOnDemand]: 240/244 looper letters, 61 selfloop transitions, 2 changer transitions 8/86 dead transitions. [2023-08-04 04:42:22,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 86 transitions, 361 flow [2023-08-04 04:42:22,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:42:22,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:42:22,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 421 transitions. [2023-08-04 04:42:22,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575136612021858 [2023-08-04 04:42:22,327 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 421 transitions. [2023-08-04 04:42:22,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 421 transitions. [2023-08-04 04:42:22,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:42:22,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 421 transitions. [2023-08-04 04:42:22,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 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 04:42:22,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 244.0) internal successors, (976), 4 states have internal predecessors, (976), 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 04:42:22,331 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 244.0) internal successors, (976), 4 states have internal predecessors, (976), 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 04:42:22,332 INFO L175 Difference]: Start difference. First operand has 55 places, 61 transitions, 159 flow. Second operand 3 states and 421 transitions. [2023-08-04 04:42:22,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 86 transitions, 361 flow [2023-08-04 04:42:22,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 86 transitions, 357 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 04:42:22,335 INFO L231 Difference]: Finished difference. Result has 56 places, 61 transitions, 165 flow [2023-08-04 04:42:22,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=244, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=56, PETRI_TRANSITIONS=61} [2023-08-04 04:42:22,335 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 4 predicate places. [2023-08-04 04:42:22,336 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 61 transitions, 165 flow [2023-08-04 04:42:22,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 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 04:42:22,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:42:22,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:42:22,346 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 04:42:22,542 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 04:42:22,542 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:42:22,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:42:22,543 INFO L85 PathProgramCache]: Analyzing trace with hash 883338761, now seen corresponding path program 1 times [2023-08-04 04:42:22,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:42:22,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142470382] [2023-08-04 04:42:22,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:42:22,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:42:22,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:42:22,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:42:22,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:42:22,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142470382] [2023-08-04 04:42:22,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142470382] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:42:22,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324818539] [2023-08-04 04:42:22,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:42:22,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:42:22,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:42:22,605 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 04:42:22,608 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 04:42:22,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:42:22,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 04:42:22,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:42:22,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:42:22,711 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:42:22,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:42:22,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324818539] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:42:22,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:42:22,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-04 04:42:22,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049593583] [2023-08-04 04:42:22,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:42:22,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 04:42:22,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:42:22,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 04:42:22,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 04:42:22,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 244 [2023-08-04 04:42:22,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 61 transitions, 165 flow. Second operand has 4 states, 4 states have (on average 122.0) internal successors, (488), 4 states have internal predecessors, (488), 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 04:42:22,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:42:22,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 244 [2023-08-04 04:42:22,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:42:22,783 INFO L124 PetriNetUnfolderBase]: 41/83 cut-off events. [2023-08-04 04:42:22,783 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-08-04 04:42:22,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 83 events. 41/83 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 206 event pairs, 5 based on Foata normal form. 13/75 useless extension candidates. Maximal degree in co-relation 177. Up to 61 conditions per place. [2023-08-04 04:42:22,784 INFO L140 encePairwiseOnDemand]: 241/244 looper letters, 0 selfloop transitions, 0 changer transitions 35/35 dead transitions. [2023-08-04 04:42:22,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 35 transitions, 142 flow [2023-08-04 04:42:22,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 04:42:22,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 04:42:22,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 502 transitions. [2023-08-04 04:42:22,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.514344262295082 [2023-08-04 04:42:22,786 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 502 transitions. [2023-08-04 04:42:22,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 502 transitions. [2023-08-04 04:42:22,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:42:22,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 502 transitions. [2023-08-04 04:42:22,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 125.5) internal successors, (502), 4 states have internal predecessors, (502), 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 04:42:22,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 244.0) internal successors, (1220), 5 states have internal predecessors, (1220), 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 04:42:22,791 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 244.0) internal successors, (1220), 5 states have internal predecessors, (1220), 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 04:42:22,791 INFO L175 Difference]: Start difference. First operand has 56 places, 61 transitions, 165 flow. Second operand 4 states and 502 transitions. [2023-08-04 04:42:22,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 35 transitions, 142 flow [2023-08-04 04:42:22,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 35 transitions, 130 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-04 04:42:22,792 INFO L231 Difference]: Finished difference. Result has 24 places, 0 transitions, 0 flow [2023-08-04 04:42:22,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=244, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=24, PETRI_TRANSITIONS=0} [2023-08-04 04:42:22,793 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -28 predicate places. [2023-08-04 04:42:22,793 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 0 transitions, 0 flow [2023-08-04 04:42:22,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 122.0) internal successors, (488), 4 states have internal predecessors, (488), 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 04:42:22,796 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-04 04:42:22,796 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-04 04:42:22,797 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-04 04:42:22,797 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-04 04:42:22,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 04:42:23,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-04 04:42:23,003 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 04:42:23,005 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-04 04:42:23,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 120 places, 143 transitions, 308 flow [2023-08-04 04:42:23,040 INFO L124 PetriNetUnfolderBase]: 52/282 cut-off events. [2023-08-04 04:42:23,040 INFO L125 PetriNetUnfolderBase]: For 8/14 co-relation queries the response was YES. [2023-08-04 04:42:23,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 282 events. 52/282 cut-off events. For 8/14 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1051 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 152. Up to 8 conditions per place. [2023-08-04 04:42:23,042 INFO L82 GeneralOperation]: Start removeDead. Operand has 120 places, 143 transitions, 308 flow [2023-08-04 04:42:23,047 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 120 places, 143 transitions, 308 flow [2023-08-04 04:42:23,047 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:42:23,047 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 120 places, 143 transitions, 308 flow [2023-08-04 04:42:23,048 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 120 places, 143 transitions, 308 flow [2023-08-04 04:42:23,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 120 places, 143 transitions, 308 flow [2023-08-04 04:42:23,074 INFO L124 PetriNetUnfolderBase]: 52/282 cut-off events. [2023-08-04 04:42:23,074 INFO L125 PetriNetUnfolderBase]: For 8/14 co-relation queries the response was YES. [2023-08-04 04:42:23,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 282 events. 52/282 cut-off events. For 8/14 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1051 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 152. Up to 8 conditions per place. [2023-08-04 04:42:23,082 INFO L119 LiptonReduction]: Number of co-enabled transitions 9216 [2023-08-04 04:42:24,789 INFO L134 LiptonReduction]: Checked pairs total: 18786 [2023-08-04 04:42:24,789 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-08-04 04:42:24,791 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 04:42:24,792 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;@755f9785, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:42:24,792 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 04:42:24,794 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:42:24,794 INFO L124 PetriNetUnfolderBase]: 2/26 cut-off events. [2023-08-04 04:42:24,794 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:42:24,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:42:24,794 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 04:42:24,795 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 04:42:24,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:42:24,795 INFO L85 PathProgramCache]: Analyzing trace with hash -273337576, now seen corresponding path program 1 times [2023-08-04 04:42:24,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:42:24,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027651060] [2023-08-04 04:42:24,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:42:24,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:42:24,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 04:42:24,831 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 04:42:24,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 04:42:24,865 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 04:42:24,865 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 04:42:24,866 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 04:42:24,866 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 04:42:24,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-04 04:42:24,866 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 04:42:24,867 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 04:42:24,867 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 04:42:24,867 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 04:42:24,906 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 04:42:24,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 221 transitions, 490 flow [2023-08-04 04:42:24,993 INFO L124 PetriNetUnfolderBase]: 181/879 cut-off events. [2023-08-04 04:42:24,994 INFO L125 PetriNetUnfolderBase]: For 72/88 co-relation queries the response was YES. [2023-08-04 04:42:25,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 976 conditions, 879 events. 181/879 cut-off events. For 72/88 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 4792 event pairs, 1 based on Foata normal form. 0/703 useless extension candidates. Maximal degree in co-relation 534. Up to 32 conditions per place. [2023-08-04 04:42:25,002 INFO L82 GeneralOperation]: Start removeDead. Operand has 178 places, 221 transitions, 490 flow [2023-08-04 04:42:25,009 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 178 places, 221 transitions, 490 flow [2023-08-04 04:42:25,009 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:42:25,009 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 178 places, 221 transitions, 490 flow [2023-08-04 04:42:25,010 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 178 places, 221 transitions, 490 flow [2023-08-04 04:42:25,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 221 transitions, 490 flow [2023-08-04 04:42:25,123 INFO L124 PetriNetUnfolderBase]: 181/879 cut-off events. [2023-08-04 04:42:25,123 INFO L125 PetriNetUnfolderBase]: For 72/88 co-relation queries the response was YES. [2023-08-04 04:42:25,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 976 conditions, 879 events. 181/879 cut-off events. For 72/88 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 4792 event pairs, 1 based on Foata normal form. 0/703 useless extension candidates. Maximal degree in co-relation 534. Up to 32 conditions per place. [2023-08-04 04:42:25,157 INFO L119 LiptonReduction]: Number of co-enabled transitions 30240 [2023-08-04 04:42:27,327 INFO L134 LiptonReduction]: Checked pairs total: 70961 [2023-08-04 04:42:27,327 INFO L136 LiptonReduction]: Total number of compositions: 147 [2023-08-04 04:42:27,329 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 04:42:27,329 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;@755f9785, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:42:27,330 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-04 04:42:27,338 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:42:27,339 INFO L124 PetriNetUnfolderBase]: 13/92 cut-off events. [2023-08-04 04:42:27,339 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-04 04:42:27,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:42:27,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:42:27,339 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-04 04:42:27,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:42:27,340 INFO L85 PathProgramCache]: Analyzing trace with hash -683654130, now seen corresponding path program 1 times [2023-08-04 04:42:27,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:42:27,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167682136] [2023-08-04 04:42:27,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:42:27,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:42:27,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:42:27,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:42:27,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:42:27,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167682136] [2023-08-04 04:42:27,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167682136] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:42:27,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:42:27,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:42:27,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523020784] [2023-08-04 04:42:27,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:42:27,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:42:27,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:42:27,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:42:27,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:42:27,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 368 [2023-08-04 04:42:27,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 107 transitions, 262 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 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 04:42:27,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:42:27,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 368 [2023-08-04 04:42:27,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand