/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-wmm_mix026_pso.opt_rmo.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 05:52:47,917 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 05:52:47,990 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 05:52:47,997 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 05:52:47,997 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 05:52:47,998 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 05:52:47,998 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 05:52:48,027 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 05:52:48,028 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 05:52:48,028 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 05:52:48,031 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 05:52:48,032 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 05:52:48,032 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 05:52:48,037 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 05:52:48,038 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 05:52:48,038 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 05:52:48,039 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 05:52:48,040 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 05:52:48,040 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 05:52:48,040 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 05:52:48,040 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 05:52:48,041 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 05:52:48,041 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 05:52:48,041 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 05:52:48,041 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 05:52:48,041 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 05:52:48,042 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 05:52:48,042 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 05:52:48,042 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 05:52:48,042 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 05:52:48,043 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 05:52:48,044 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 05:52:48,044 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 05:52:48,044 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 05:52:48,044 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 05:52:48,044 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 05:52:48,044 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 05:52:48,044 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 05:52:48,045 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 05:52:48,045 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 05:52:48,045 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 05:52:48,045 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 05:52:48,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 05:52:48,318 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 05:52:48,320 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 05:52:48,321 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 05:52:48,322 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 05:52:48,323 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix026_pso.opt_rmo.opt_bound2.i [2023-08-04 05:52:49,467 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 05:52:49,720 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 05:52:49,725 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix026_pso.opt_rmo.opt_bound2.i [2023-08-04 05:52:49,747 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b973e0a4/9a6bfda3c83b4054bcab6383a96b67e9/FLAG7539b2358 [2023-08-04 05:52:49,762 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b973e0a4/9a6bfda3c83b4054bcab6383a96b67e9 [2023-08-04 05:52:49,767 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 05:52:49,770 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 05:52:49,771 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 05:52:49,771 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 05:52:49,776 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 05:52:49,776 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 05:52:49" (1/1) ... [2023-08-04 05:52:49,777 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bbf2810 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:52:49, skipping insertion in model container [2023-08-04 05:52:49,777 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 05:52:49" (1/1) ... [2023-08-04 05:52:49,824 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 05:52:49,969 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_mix026_pso.opt_rmo.opt_bound2.i[956,969] [2023-08-04 05:52:50,109 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 05:52:50,118 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 05:52:50,129 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_mix026_pso.opt_rmo.opt_bound2.i[956,969] [2023-08-04 05:52:50,137 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 05:52:50,138 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 05:52:50,173 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 05:52:50,211 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 05:52:50,211 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 05:52:50,217 INFO L206 MainTranslator]: Completed translation [2023-08-04 05:52:50,219 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:52:50 WrapperNode [2023-08-04 05:52:50,220 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 05:52:50,221 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 05:52:50,221 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 05:52:50,221 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 05:52:50,227 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:52:50" (1/1) ... [2023-08-04 05:52:50,259 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:52:50" (1/1) ... [2023-08-04 05:52:50,306 INFO L138 Inliner]: procedures = 177, calls = 69, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 177 [2023-08-04 05:52:50,306 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 05:52:50,307 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 05:52:50,307 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 05:52:50,307 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 05:52:50,319 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:52:50" (1/1) ... [2023-08-04 05:52:50,320 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:52:50" (1/1) ... [2023-08-04 05:52:50,332 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:52:50" (1/1) ... [2023-08-04 05:52:50,332 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:52:50" (1/1) ... [2023-08-04 05:52:50,341 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:52:50" (1/1) ... [2023-08-04 05:52:50,346 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:52:50" (1/1) ... [2023-08-04 05:52:50,348 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:52:50" (1/1) ... [2023-08-04 05:52:50,350 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:52:50" (1/1) ... [2023-08-04 05:52:50,361 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 05:52:50,362 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 05:52:50,362 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 05:52:50,362 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 05:52:50,363 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:52:50" (1/1) ... [2023-08-04 05:52:50,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 05:52:50,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 05:52:50,396 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 05:52:50,422 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 05:52:50,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 05:52:50,442 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 05:52:50,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 05:52:50,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 05:52:50,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 05:52:50,443 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 05:52:50,444 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 05:52:50,444 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 05:52:50,444 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 05:52:50,445 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 05:52:50,445 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 05:52:50,445 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-04 05:52:50,445 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-04 05:52:50,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 05:52:50,445 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 05:52:50,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 05:52:50,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 05:52:50,447 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 05:52:50,573 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 05:52:50,575 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 05:52:50,877 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 05:52:50,988 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 05:52:50,989 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-04 05:52:50,991 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 05:52:50 BoogieIcfgContainer [2023-08-04 05:52:50,991 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 05:52:50,993 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 05:52:50,993 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 05:52:50,996 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 05:52:50,996 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 05:52:49" (1/3) ... [2023-08-04 05:52:50,997 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33e12c3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 05:52:50, skipping insertion in model container [2023-08-04 05:52:50,997 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:52:50" (2/3) ... [2023-08-04 05:52:50,998 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33e12c3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 05:52:50, skipping insertion in model container [2023-08-04 05:52:50,998 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 05:52:50" (3/3) ... [2023-08-04 05:52:50,999 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_mix026_pso.opt_rmo.opt_bound2.i [2023-08-04 05:52:51,007 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 05:52:51,016 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 05:52:51,016 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-04 05:52:51,016 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 05:52:51,092 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 05:52:51,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 160 places, 157 transitions, 334 flow [2023-08-04 05:52:51,342 INFO L124 PetriNetUnfolderBase]: 62/933 cut-off events. [2023-08-04 05:52:51,342 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 05:52:51,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 983 conditions, 933 events. 62/933 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5782 event pairs, 0 based on Foata normal form. 0/821 useless extension candidates. Maximal degree in co-relation 554. Up to 32 conditions per place. [2023-08-04 05:52:51,351 INFO L82 GeneralOperation]: Start removeDead. Operand has 160 places, 157 transitions, 334 flow [2023-08-04 05:52:51,361 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 158 places, 155 transitions, 326 flow [2023-08-04 05:52:51,364 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 05:52:51,377 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 158 places, 155 transitions, 326 flow [2023-08-04 05:52:51,381 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 158 places, 155 transitions, 326 flow [2023-08-04 05:52:51,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 155 transitions, 326 flow [2023-08-04 05:52:51,489 INFO L124 PetriNetUnfolderBase]: 62/930 cut-off events. [2023-08-04 05:52:51,490 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 05:52:51,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 977 conditions, 930 events. 62/930 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5745 event pairs, 0 based on Foata normal form. 0/818 useless extension candidates. Maximal degree in co-relation 548. Up to 32 conditions per place. [2023-08-04 05:52:51,510 INFO L119 LiptonReduction]: Number of co-enabled transitions 3984 [2023-08-04 05:52:55,410 INFO L134 LiptonReduction]: Checked pairs total: 9946 [2023-08-04 05:52:55,410 INFO L136 LiptonReduction]: Total number of compositions: 131 [2023-08-04 05:52:55,422 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 05:52:55,433 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;@b759d81, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 05:52:55,433 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 05:52:55,438 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 05:52:55,438 INFO L124 PetriNetUnfolderBase]: 1/28 cut-off events. [2023-08-04 05:52:55,438 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 05:52:55,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 05:52:55,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 05:52:55,440 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 05:52:55,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 05:52:55,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1963419240, now seen corresponding path program 1 times [2023-08-04 05:52:55,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 05:52:55,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474686102] [2023-08-04 05:52:55,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 05:52:55,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 05:52:55,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 05:52:55,740 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 05:52:55,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 05:52:55,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474686102] [2023-08-04 05:52:55,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474686102] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 05:52:55,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 05:52:55,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 05:52:55,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744599843] [2023-08-04 05:52:55,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 05:52:55,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 05:52:55,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 05:52:55,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 05:52:55,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 05:52:55,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 288 [2023-08-04 05:52:55,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 41 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 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 05:52:55,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 05:52:55,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 288 [2023-08-04 05:52:55,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 05:52:57,561 INFO L124 PetriNetUnfolderBase]: 10309/15013 cut-off events. [2023-08-04 05:52:57,561 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-08-04 05:52:57,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30087 conditions, 15013 events. 10309/15013 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 94074 event pairs, 7467 based on Foata normal form. 450/12955 useless extension candidates. Maximal degree in co-relation 30073. Up to 14573 conditions per place. [2023-08-04 05:52:57,653 INFO L140 encePairwiseOnDemand]: 284/288 looper letters, 34 selfloop transitions, 2 changer transitions 1/43 dead transitions. [2023-08-04 05:52:57,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 43 transitions, 176 flow [2023-08-04 05:52:57,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 05:52:57,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 05:52:57,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 447 transitions. [2023-08-04 05:52:57,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5173611111111112 [2023-08-04 05:52:57,666 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 447 transitions. [2023-08-04 05:52:57,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 447 transitions. [2023-08-04 05:52:57,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 05:52:57,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 447 transitions. [2023-08-04 05:52:57,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 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 05:52:57,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 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 05:52:57,678 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 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 05:52:57,680 INFO L175 Difference]: Start difference. First operand has 49 places, 41 transitions, 98 flow. Second operand 3 states and 447 transitions. [2023-08-04 05:52:57,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 43 transitions, 176 flow [2023-08-04 05:52:57,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 43 transitions, 176 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 05:52:57,685 INFO L231 Difference]: Finished difference. Result has 52 places, 40 transitions, 104 flow [2023-08-04 05:52:57,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=52, PETRI_TRANSITIONS=40} [2023-08-04 05:52:57,689 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-08-04 05:52:57,689 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 40 transitions, 104 flow [2023-08-04 05:52:57,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 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 05:52:57,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 05:52:57,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 05:52:57,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 05:52:57,691 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 05:52:57,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 05:52:57,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1601581756, now seen corresponding path program 1 times [2023-08-04 05:52:57,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 05:52:57,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113058707] [2023-08-04 05:52:57,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 05:52:57,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 05:52:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 05:52:57,802 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 05:52:57,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 05:52:57,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113058707] [2023-08-04 05:52:57,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113058707] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 05:52:57,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974295394] [2023-08-04 05:52:57,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 05:52:57,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 05:52:57,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 05:52:57,806 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 05:52:57,827 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 05:52:57,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 05:52:57,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 05:52:57,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 05:52:57,954 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 05:52:57,955 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 05:52:57,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974295394] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 05:52:57,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 05:52:57,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 05:52:57,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406696728] [2023-08-04 05:52:57,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 05:52:57,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 05:52:57,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 05:52:57,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 05:52:57,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 05:52:57,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 288 [2023-08-04 05:52:57,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 40 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 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 05:52:57,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 05:52:57,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 288 [2023-08-04 05:52:57,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 05:52:59,273 INFO L124 PetriNetUnfolderBase]: 8763/12549 cut-off events. [2023-08-04 05:52:59,275 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-04 05:52:59,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25159 conditions, 12549 events. 8763/12549 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 74092 event pairs, 6204 based on Foata normal form. 0/10544 useless extension candidates. Maximal degree in co-relation 25142. Up to 12159 conditions per place. [2023-08-04 05:52:59,360 INFO L140 encePairwiseOnDemand]: 285/288 looper letters, 37 selfloop transitions, 2 changer transitions 1/46 dead transitions. [2023-08-04 05:52:59,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 46 transitions, 196 flow [2023-08-04 05:52:59,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 05:52:59,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 05:52:59,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 449 transitions. [2023-08-04 05:52:59,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5196759259259259 [2023-08-04 05:52:59,363 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 449 transitions. [2023-08-04 05:52:59,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 449 transitions. [2023-08-04 05:52:59,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 05:52:59,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 449 transitions. [2023-08-04 05:52:59,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 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 05:52:59,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 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 05:52:59,368 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 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 05:52:59,368 INFO L175 Difference]: Start difference. First operand has 52 places, 40 transitions, 104 flow. Second operand 3 states and 449 transitions. [2023-08-04 05:52:59,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 46 transitions, 196 flow [2023-08-04 05:52:59,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 46 transitions, 192 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 05:52:59,370 INFO L231 Difference]: Finished difference. Result has 53 places, 40 transitions, 108 flow [2023-08-04 05:52:59,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=53, PETRI_TRANSITIONS=40} [2023-08-04 05:52:59,371 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2023-08-04 05:52:59,371 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 40 transitions, 108 flow [2023-08-04 05:52:59,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 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 05:52:59,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 05:52:59,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 05:52:59,384 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 05:52:59,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 05:52:59,579 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 05:52:59,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 05:52:59,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1245382906, now seen corresponding path program 1 times [2023-08-04 05:52:59,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 05:52:59,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151871900] [2023-08-04 05:52:59,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 05:52:59,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 05:52:59,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 05:52:59,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 05:52:59,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 05:52:59,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151871900] [2023-08-04 05:52:59,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151871900] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 05:52:59,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470936305] [2023-08-04 05:52:59,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 05:52:59,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 05:52:59,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 05:52:59,705 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 05:52:59,722 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 05:52:59,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 05:52:59,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 05:52:59,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 05:52:59,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 05:52:59,865 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 05:52:59,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 05:52:59,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470936305] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 05:52:59,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 05:52:59,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 05:52:59,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253007975] [2023-08-04 05:52:59,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 05:52:59,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 05:52:59,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 05:52:59,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 05:52:59,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 05:52:59,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 288 [2023-08-04 05:52:59,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 108 flow. Second operand has 5 states, 5 states have (on average 138.2) internal successors, (691), 5 states have internal predecessors, (691), 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 05:52:59,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 05:52:59,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 288 [2023-08-04 05:52:59,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 05:52:59,926 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-08-04 05:52:59,926 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 05:52:59,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 16 events. 4/16 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 0 based on Foata normal form. 3/19 useless extension candidates. Maximal degree in co-relation 36. Up to 10 conditions per place. [2023-08-04 05:52:59,927 INFO L140 encePairwiseOnDemand]: 285/288 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-04 05:52:59,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 10 transitions, 43 flow [2023-08-04 05:52:59,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 05:52:59,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 05:52:59,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 550 transitions. [2023-08-04 05:52:59,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4774305555555556 [2023-08-04 05:52:59,930 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 550 transitions. [2023-08-04 05:52:59,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 550 transitions. [2023-08-04 05:52:59,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 05:52:59,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 550 transitions. [2023-08-04 05:52:59,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 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 05:52:59,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 288.0) internal successors, (1440), 5 states have internal predecessors, (1440), 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 05:52:59,934 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 288.0) internal successors, (1440), 5 states have internal predecessors, (1440), 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 05:52:59,934 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 108 flow. Second operand 4 states and 550 transitions. [2023-08-04 05:52:59,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 10 transitions, 43 flow [2023-08-04 05:52:59,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 10 transitions, 41 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 05:52:59,935 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-04 05:52:59,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2023-08-04 05:52:59,936 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -31 predicate places. [2023-08-04 05:52:59,937 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-04 05:52:59,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 138.2) internal successors, (691), 5 states have internal predecessors, (691), 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 05:52:59,940 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-04 05:52:59,940 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-04 05:52:59,940 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-04 05:52:59,950 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 05:53:00,146 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,SelfDestructingSolverStorable2 [2023-08-04 05:53:00,146 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-04 05:53:00,148 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-08-04 05:53:00,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 160 places, 157 transitions, 334 flow [2023-08-04 05:53:00,236 INFO L124 PetriNetUnfolderBase]: 62/933 cut-off events. [2023-08-04 05:53:00,237 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 05:53:00,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 983 conditions, 933 events. 62/933 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5782 event pairs, 0 based on Foata normal form. 0/821 useless extension candidates. Maximal degree in co-relation 554. Up to 32 conditions per place. [2023-08-04 05:53:00,239 INFO L82 GeneralOperation]: Start removeDead. Operand has 160 places, 157 transitions, 334 flow [2023-08-04 05:53:00,241 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 132 places, 126 transitions, 272 flow [2023-08-04 05:53:00,241 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 05:53:00,241 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 132 places, 126 transitions, 272 flow [2023-08-04 05:53:00,241 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 132 places, 126 transitions, 272 flow [2023-08-04 05:53:00,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 126 transitions, 272 flow [2023-08-04 05:53:00,277 INFO L124 PetriNetUnfolderBase]: 14/437 cut-off events. [2023-08-04 05:53:00,278 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 05:53:00,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 487 conditions, 437 events. 14/437 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2005 event pairs, 0 based on Foata normal form. 0/405 useless extension candidates. Maximal degree in co-relation 306. Up to 16 conditions per place. [2023-08-04 05:53:00,283 INFO L119 LiptonReduction]: Number of co-enabled transitions 2284 [2023-08-04 05:53:03,524 INFO L134 LiptonReduction]: Checked pairs total: 5727 [2023-08-04 05:53:03,525 INFO L136 LiptonReduction]: Total number of compositions: 98 [2023-08-04 05:53:03,526 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 05:53:03,527 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;@b759d81, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 05:53:03,527 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 05:53:03,530 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 05:53:03,530 INFO L124 PetriNetUnfolderBase]: 0/19 cut-off events. [2023-08-04 05:53:03,530 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 05:53:03,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 05:53:03,530 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 05:53:03,530 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 05:53:03,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 05:53:03,530 INFO L85 PathProgramCache]: Analyzing trace with hash 566166387, now seen corresponding path program 1 times [2023-08-04 05:53:03,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 05:53:03,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151574472] [2023-08-04 05:53:03,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 05:53:03,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 05:53:03,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 05:53:03,550 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 05:53:03,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 05:53:03,571 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 05:53:03,574 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 05:53:03,575 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 05:53:03,575 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 05:53:03,575 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 05:53:03,575 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 05:53:03,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 05:53:03,576 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 05:53:03,576 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 05:53:03,577 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 05:53:03,577 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 05:53:03,607 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 05:53:03,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 189 transitions, 426 flow [2023-08-04 05:53:04,079 INFO L124 PetriNetUnfolderBase]: 282/4333 cut-off events. [2023-08-04 05:53:04,080 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-04 05:53:04,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4622 conditions, 4333 events. 282/4333 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 42162 event pairs, 0 based on Foata normal form. 0/3832 useless extension candidates. Maximal degree in co-relation 3128. Up to 162 conditions per place. [2023-08-04 05:53:04,110 INFO L82 GeneralOperation]: Start removeDead. Operand has 200 places, 189 transitions, 426 flow [2023-08-04 05:53:04,121 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 198 places, 187 transitions, 414 flow [2023-08-04 05:53:04,121 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 05:53:04,121 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 198 places, 187 transitions, 414 flow [2023-08-04 05:53:04,122 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 198 places, 187 transitions, 414 flow [2023-08-04 05:53:04,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 187 transitions, 414 flow [2023-08-04 05:53:04,595 INFO L124 PetriNetUnfolderBase]: 282/4329 cut-off events. [2023-08-04 05:53:04,596 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2023-08-04 05:53:04,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4610 conditions, 4329 events. 282/4329 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 42133 event pairs, 0 based on Foata normal form. 0/3828 useless extension candidates. Maximal degree in co-relation 3116. Up to 162 conditions per place. [2023-08-04 05:53:04,666 INFO L119 LiptonReduction]: Number of co-enabled transitions 9744 [2023-08-04 05:53:08,219 INFO L134 LiptonReduction]: Checked pairs total: 29191 [2023-08-04 05:53:08,219 INFO L136 LiptonReduction]: Total number of compositions: 140 [2023-08-04 05:53:08,221 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 05:53:08,222 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;@b759d81, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 05:53:08,222 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 05:53:08,224 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 05:53:08,224 INFO L124 PetriNetUnfolderBase]: 1/21 cut-off events. [2023-08-04 05:53:08,224 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 05:53:08,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 05:53:08,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 05:53:08,225 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 05:53:08,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 05:53:08,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1635706584, now seen corresponding path program 1 times [2023-08-04 05:53:08,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 05:53:08,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612831887] [2023-08-04 05:53:08,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 05:53:08,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 05:53:08,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 05:53:08,291 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 05:53:08,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 05:53:08,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612831887] [2023-08-04 05:53:08,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612831887] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 05:53:08,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 05:53:08,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 05:53:08,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130891660] [2023-08-04 05:53:08,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 05:53:08,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 05:53:08,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 05:53:08,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 05:53:08,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 05:53:08,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 329 [2023-08-04 05:53:08,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 65 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 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 05:53:08,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 05:53:08,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 329 [2023-08-04 05:53:08,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand